2009-05-29 01:55:04 +08:00
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#include "util.h"
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#include "../perf.h"
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2009-06-02 04:50:19 +08:00
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#include "string.h"
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2009-05-29 01:55:04 +08:00
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#include "symbol.h"
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2009-10-02 14:29:58 +08:00
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#include "thread.h"
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2009-05-29 01:55:04 +08:00
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2009-08-17 04:05:48 +08:00
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#include "debug.h"
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2009-05-29 01:55:04 +08:00
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#include <libelf.h>
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#include <gelf.h>
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#include <elf.h>
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2009-10-02 14:29:58 +08:00
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#include <sys/utsname.h>
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2009-08-05 20:05:16 +08:00
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2009-08-07 01:43:17 +08:00
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enum dso_origin {
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DSO__ORIG_KERNEL = 0,
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DSO__ORIG_JAVA_JIT,
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DSO__ORIG_FEDORA,
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DSO__ORIG_UBUNTU,
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DSO__ORIG_BUILDID,
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DSO__ORIG_DSO,
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2009-10-02 14:29:58 +08:00
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DSO__ORIG_KMODULE,
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2009-08-07 01:43:17 +08:00
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DSO__ORIG_NOT_FOUND,
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};
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2009-10-02 14:29:58 +08:00
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static void dsos__add(struct dso *dso);
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static struct dso *dsos__find(const char *name);
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2009-10-08 00:48:56 +08:00
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static struct map *map__new2(u64 start, struct dso *dso);
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static void kernel_maps__insert(struct map *map);
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2009-10-31 02:28:24 +08:00
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unsigned int symbol__priv_size;
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2009-10-02 14:29:58 +08:00
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2009-10-06 01:26:17 +08:00
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static struct rb_root kernel_maps;
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2009-10-08 00:48:56 +08:00
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static void dso__fixup_sym_end(struct dso *self)
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2009-10-06 01:26:17 +08:00
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{
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struct rb_node *nd, *prevnd = rb_first(&self->syms);
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2009-10-08 00:48:56 +08:00
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struct symbol *curr, *prev;
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2009-10-06 01:26:17 +08:00
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if (prevnd == NULL)
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return;
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2009-10-08 00:48:56 +08:00
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curr = rb_entry(prevnd, struct symbol, rb_node);
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2009-10-06 01:26:17 +08:00
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for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
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2009-10-08 00:48:56 +08:00
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prev = curr;
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curr = rb_entry(nd, struct symbol, rb_node);
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2009-10-06 01:26:17 +08:00
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if (prev->end == prev->start)
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prev->end = curr->start - 1;
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}
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2009-10-08 00:48:56 +08:00
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/* Last entry */
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if (curr->end == curr->start)
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curr->end = roundup(curr->start, 4096);
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2009-10-06 01:26:17 +08:00
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}
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2009-10-08 00:48:56 +08:00
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static void kernel_maps__fixup_end(void)
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2009-10-06 01:26:17 +08:00
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{
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struct map *prev, *curr;
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struct rb_node *nd, *prevnd = rb_first(&kernel_maps);
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if (prevnd == NULL)
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return;
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curr = rb_entry(prevnd, struct map, rb_node);
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for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
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prev = curr;
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curr = rb_entry(nd, struct map, rb_node);
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prev->end = curr->start - 1;
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2009-10-08 00:48:56 +08:00
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}
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nd = rb_last(&curr->dso->syms);
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if (nd) {
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struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
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curr->end = sym->end;
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2009-10-06 01:26:17 +08:00
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}
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}
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2009-10-31 02:28:24 +08:00
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static struct symbol *symbol__new(u64 start, u64 len, const char *name)
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2009-05-29 01:55:04 +08:00
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{
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2009-05-29 01:55:13 +08:00
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size_t namelen = strlen(name) + 1;
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2009-10-31 02:28:24 +08:00
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struct symbol *self = calloc(1, (symbol__priv_size +
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sizeof(*self) + namelen));
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perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
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if (!self)
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return NULL;
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2009-10-31 02:28:24 +08:00
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if (symbol__priv_size) {
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memset(self, 0, symbol__priv_size);
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self = ((void *)self) + symbol__priv_size;
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2009-05-29 01:55:04 +08:00
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}
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perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
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self->start = start;
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2009-07-02 14:08:36 +08:00
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self->end = len ? start + len - 1 : start;
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2009-10-21 00:25:40 +08:00
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2009-10-22 03:34:06 +08:00
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pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
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2009-10-21 00:25:40 +08:00
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perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
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memcpy(self->name, name, namelen);
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2009-05-29 01:55:04 +08:00
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return self;
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}
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2009-10-31 02:28:24 +08:00
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static void symbol__delete(struct symbol *self)
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2009-05-29 01:55:04 +08:00
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{
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2009-10-31 02:28:24 +08:00
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free(((void *)self) - symbol__priv_size);
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2009-05-29 01:55:04 +08:00
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}
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static size_t symbol__fprintf(struct symbol *self, FILE *fp)
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{
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2009-10-02 14:29:58 +08:00
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return fprintf(fp, " %llx-%llx %s\n",
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2009-05-29 01:55:04 +08:00
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self->start, self->end, self->name);
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}
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2009-11-18 01:40:53 +08:00
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static void dso__set_long_name(struct dso *self, char *name)
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{
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self->long_name = name;
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self->long_name_len = strlen(name);
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}
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static void dso__set_basename(struct dso *self)
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{
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self->short_name = basename(self->long_name);
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}
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2009-10-31 02:28:24 +08:00
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struct dso *dso__new(const char *name)
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2009-05-29 01:55:04 +08:00
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{
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struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
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if (self != NULL) {
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strcpy(self->name, name);
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2009-11-18 01:40:53 +08:00
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dso__set_long_name(self, self->name);
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2009-10-02 14:29:58 +08:00
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self->short_name = self->name;
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2009-05-29 01:55:04 +08:00
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self->syms = RB_ROOT;
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2009-06-05 20:04:59 +08:00
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self->find_symbol = dso__find_symbol;
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2009-07-11 09:47:28 +08:00
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self->slen_calculated = 0;
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2009-08-07 01:43:17 +08:00
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self->origin = DSO__ORIG_NOT_FOUND;
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perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
self->loaded = 0;
|
|
|
|
self->has_build_id = 0;
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return self;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dso__delete_symbols(struct dso *self)
|
|
|
|
{
|
|
|
|
struct symbol *pos;
|
|
|
|
struct rb_node *next = rb_first(&self->syms);
|
|
|
|
|
|
|
|
while (next) {
|
|
|
|
pos = rb_entry(next, struct symbol, rb_node);
|
|
|
|
next = rb_next(&pos->rb_node);
|
2009-06-02 04:50:57 +08:00
|
|
|
rb_erase(&pos->rb_node, &self->syms);
|
2009-10-31 02:28:24 +08:00
|
|
|
symbol__delete(pos);
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void dso__delete(struct dso *self)
|
|
|
|
{
|
|
|
|
dso__delete_symbols(self);
|
2009-10-02 14:29:58 +08:00
|
|
|
if (self->long_name != self->name)
|
|
|
|
free(self->long_name);
|
2009-05-29 01:55:04 +08:00
|
|
|
free(self);
|
|
|
|
}
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
void dso__set_build_id(struct dso *self, void *build_id)
|
|
|
|
{
|
|
|
|
memcpy(self->build_id, build_id, sizeof(self->build_id));
|
|
|
|
self->has_build_id = 1;
|
|
|
|
}
|
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
static void dso__insert_symbol(struct dso *self, struct symbol *sym)
|
|
|
|
{
|
|
|
|
struct rb_node **p = &self->syms.rb_node;
|
|
|
|
struct rb_node *parent = NULL;
|
perf_counter tools: Define and use our own u64, s64 etc. definitions
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 20:21:42 +08:00
|
|
|
const u64 ip = sym->start;
|
2009-05-29 01:55:04 +08:00
|
|
|
struct symbol *s;
|
|
|
|
|
|
|
|
while (*p != NULL) {
|
|
|
|
parent = *p;
|
|
|
|
s = rb_entry(parent, struct symbol, rb_node);
|
|
|
|
if (ip < s->start)
|
|
|
|
p = &(*p)->rb_left;
|
|
|
|
else
|
|
|
|
p = &(*p)->rb_right;
|
|
|
|
}
|
|
|
|
rb_link_node(&sym->rb_node, parent, p);
|
|
|
|
rb_insert_color(&sym->rb_node, &self->syms);
|
|
|
|
}
|
|
|
|
|
perf_counter tools: Define and use our own u64, s64 etc. definitions
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 20:21:42 +08:00
|
|
|
struct symbol *dso__find_symbol(struct dso *self, u64 ip)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
|
|
|
struct rb_node *n;
|
|
|
|
|
|
|
|
if (self == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
n = self->syms.rb_node;
|
|
|
|
|
|
|
|
while (n) {
|
|
|
|
struct symbol *s = rb_entry(n, struct symbol, rb_node);
|
|
|
|
|
|
|
|
if (ip < s->start)
|
|
|
|
n = n->rb_left;
|
|
|
|
else if (ip > s->end)
|
|
|
|
n = n->rb_right;
|
|
|
|
else
|
|
|
|
return s;
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
int build_id__sprintf(u8 *self, int len, char *bf)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
char *bid = bf;
|
|
|
|
u8 *raw = self;
|
|
|
|
int i;
|
2009-05-29 01:55:04 +08:00
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
for (i = 0; i < len; ++i) {
|
|
|
|
sprintf(bid, "%02x", *raw);
|
|
|
|
++raw;
|
|
|
|
bid += 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
return raw - self;
|
|
|
|
}
|
|
|
|
|
2009-11-17 02:32:44 +08:00
|
|
|
size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
{
|
|
|
|
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
|
|
|
|
|
|
|
|
build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
|
2009-11-17 02:32:44 +08:00
|
|
|
return fprintf(fp, "%s", sbuild_id);
|
|
|
|
}
|
|
|
|
|
|
|
|
size_t dso__fprintf(struct dso *self, FILE *fp)
|
|
|
|
{
|
|
|
|
struct rb_node *nd;
|
|
|
|
size_t ret = fprintf(fp, "dso: %s (", self->short_name);
|
|
|
|
|
|
|
|
ret += dso__fprintf_buildid(self, fp);
|
|
|
|
ret += fprintf(fp, ")\n");
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
|
|
|
|
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
|
|
|
|
ret += symbol__fprintf(pos, fp);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
/*
|
|
|
|
* Loads the function entries in /proc/kallsyms into kernel_map->dso,
|
|
|
|
* so that we can in the next step set the symbol ->end address and then
|
|
|
|
* call kernel_maps__split_kallsyms.
|
|
|
|
*/
|
2009-10-22 03:34:06 +08:00
|
|
|
static int kernel_maps__load_all_kallsyms(void)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
|
|
|
char *line = NULL;
|
|
|
|
size_t n;
|
|
|
|
FILE *file = fopen("/proc/kallsyms", "r");
|
|
|
|
|
|
|
|
if (file == NULL)
|
|
|
|
goto out_failure;
|
|
|
|
|
|
|
|
while (!feof(file)) {
|
perf_counter tools: Define and use our own u64, s64 etc. definitions
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 20:21:42 +08:00
|
|
|
u64 start;
|
2009-05-29 01:55:04 +08:00
|
|
|
struct symbol *sym;
|
|
|
|
int line_len, len;
|
|
|
|
char symbol_type;
|
2009-10-08 00:48:56 +08:00
|
|
|
char *symbol_name;
|
2009-05-29 01:55:04 +08:00
|
|
|
|
|
|
|
line_len = getline(&line, &n, file);
|
|
|
|
if (line_len < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (!line)
|
|
|
|
goto out_failure;
|
|
|
|
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
|
2009-06-02 04:50:19 +08:00
|
|
|
len = hex2u64(line, &start);
|
2009-05-29 01:55:04 +08:00
|
|
|
|
|
|
|
len++;
|
|
|
|
if (len + 2 >= line_len)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
symbol_type = toupper(line[len]);
|
|
|
|
/*
|
|
|
|
* We're interested only in code ('T'ext)
|
|
|
|
*/
|
|
|
|
if (symbol_type != 'T' && symbol_type != 'W')
|
|
|
|
continue;
|
2009-10-06 01:26:17 +08:00
|
|
|
|
|
|
|
symbol_name = line + len + 2;
|
2009-10-08 00:48:56 +08:00
|
|
|
/*
|
|
|
|
* Will fix up the end later, when we have all symbols sorted.
|
|
|
|
*/
|
2009-10-31 02:28:24 +08:00
|
|
|
sym = symbol__new(start, 0, symbol_name);
|
2009-10-06 01:26:17 +08:00
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
if (sym == NULL)
|
|
|
|
goto out_delete_line;
|
|
|
|
|
2009-11-16 23:48:11 +08:00
|
|
|
/*
|
|
|
|
* We will pass the symbols to the filter later, in
|
|
|
|
* kernel_maps__split_kallsyms, when we have split the
|
|
|
|
* maps per module
|
|
|
|
*/
|
2009-10-08 00:48:56 +08:00
|
|
|
dso__insert_symbol(kernel_map->dso, sym);
|
|
|
|
}
|
|
|
|
|
|
|
|
free(line);
|
|
|
|
fclose(file);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_delete_line:
|
|
|
|
free(line);
|
|
|
|
out_failure:
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Split the symbols into maps, making sure there are no overlaps, i.e. the
|
|
|
|
* kernel range is broken in several maps, named [kernel].N, as we don't have
|
|
|
|
* the original ELF section names vmlinux have.
|
|
|
|
*/
|
|
|
|
static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules)
|
|
|
|
{
|
|
|
|
struct map *map = kernel_map;
|
|
|
|
struct symbol *pos;
|
|
|
|
int count = 0;
|
|
|
|
struct rb_node *next = rb_first(&kernel_map->dso->syms);
|
|
|
|
int kernel_range = 0;
|
|
|
|
|
|
|
|
while (next) {
|
|
|
|
char *module;
|
|
|
|
|
|
|
|
pos = rb_entry(next, struct symbol, rb_node);
|
|
|
|
next = rb_next(&pos->rb_node);
|
|
|
|
|
|
|
|
module = strchr(pos->name, '\t');
|
|
|
|
if (module) {
|
2009-10-06 01:26:17 +08:00
|
|
|
if (!use_modules)
|
2009-10-08 00:48:56 +08:00
|
|
|
goto delete_symbol;
|
|
|
|
|
|
|
|
*module++ = '\0';
|
|
|
|
|
2009-10-06 01:26:17 +08:00
|
|
|
if (strcmp(map->dso->name, module)) {
|
|
|
|
map = kernel_maps__find_by_dso_name(module);
|
|
|
|
if (!map) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("/proc/{kallsyms,modules} "
|
|
|
|
"inconsistency!\n");
|
2009-10-06 01:26:17 +08:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
2009-10-08 00:48:56 +08:00
|
|
|
/*
|
|
|
|
* So that we look just like we get from .ko files,
|
|
|
|
* i.e. not prelinked, relative to map->start.
|
|
|
|
*/
|
|
|
|
pos->start = map->map_ip(map, pos->start);
|
|
|
|
pos->end = map->map_ip(map, pos->end);
|
|
|
|
} else if (map != kernel_map) {
|
|
|
|
char dso_name[PATH_MAX];
|
|
|
|
struct dso *dso;
|
|
|
|
|
|
|
|
snprintf(dso_name, sizeof(dso_name), "[kernel].%d",
|
|
|
|
kernel_range++);
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
dso = dso__new(dso_name);
|
2009-10-08 00:48:56 +08:00
|
|
|
if (dso == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
map = map__new2(pos->start, dso);
|
|
|
|
if (map == NULL) {
|
|
|
|
dso__delete(dso);
|
|
|
|
return -1;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
|
2009-10-20 03:17:57 +08:00
|
|
|
map->map_ip = map->unmap_ip = identity__map_ip;
|
2009-10-08 00:48:56 +08:00
|
|
|
kernel_maps__insert(map);
|
|
|
|
++kernel_range;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
if (filter && filter(map, pos)) {
|
|
|
|
delete_symbol:
|
|
|
|
rb_erase(&pos->rb_node, &kernel_map->dso->syms);
|
2009-10-31 02:28:24 +08:00
|
|
|
symbol__delete(pos);
|
2009-10-08 00:48:56 +08:00
|
|
|
} else {
|
|
|
|
if (map != kernel_map) {
|
|
|
|
rb_erase(&pos->rb_node, &kernel_map->dso->syms);
|
|
|
|
dso__insert_symbol(map->dso, pos);
|
|
|
|
}
|
2009-07-02 14:05:58 +08:00
|
|
|
count++;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
|
2009-07-02 14:05:58 +08:00
|
|
|
return count;
|
2009-10-08 00:48:56 +08:00
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
static int kernel_maps__load_kallsyms(symbol_filter_t filter, int use_modules)
|
2009-10-08 00:48:56 +08:00
|
|
|
{
|
2009-10-22 03:34:06 +08:00
|
|
|
if (kernel_maps__load_all_kallsyms())
|
2009-10-08 00:48:56 +08:00
|
|
|
return -1;
|
|
|
|
|
|
|
|
dso__fixup_sym_end(kernel_map->dso);
|
|
|
|
|
|
|
|
return kernel_maps__split_kallsyms(filter, use_modules);
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
static size_t kernel_maps__fprintf(FILE *fp)
|
2009-10-06 01:26:17 +08:00
|
|
|
{
|
2009-10-22 03:34:06 +08:00
|
|
|
size_t printed = fprintf(fp, "Kernel maps:\n");
|
2009-10-06 01:26:17 +08:00
|
|
|
struct rb_node *nd;
|
|
|
|
|
|
|
|
for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
|
|
|
|
struct map *pos = rb_entry(nd, struct map, rb_node);
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
printed += fprintf(fp, "Map:");
|
2009-10-06 01:26:17 +08:00
|
|
|
printed += map__fprintf(pos, fp);
|
2009-10-22 03:34:06 +08:00
|
|
|
if (verbose > 1) {
|
2009-10-08 00:48:56 +08:00
|
|
|
printed += dso__fprintf(pos->dso, fp);
|
|
|
|
printed += fprintf(fp, "--\n");
|
|
|
|
}
|
2009-10-06 01:26:17 +08:00
|
|
|
}
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
return printed + fprintf(fp, "END kernel maps\n");
|
2009-10-06 01:26:17 +08:00
|
|
|
}
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
static int dso__load_perf_map(struct dso *self, struct map *map,
|
2009-10-22 03:34:06 +08:00
|
|
|
symbol_filter_t filter)
|
2009-06-09 02:12:48 +08:00
|
|
|
{
|
|
|
|
char *line = NULL;
|
|
|
|
size_t n;
|
|
|
|
FILE *file;
|
|
|
|
int nr_syms = 0;
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
file = fopen(self->long_name, "r");
|
2009-06-09 02:12:48 +08:00
|
|
|
if (file == NULL)
|
|
|
|
goto out_failure;
|
|
|
|
|
|
|
|
while (!feof(file)) {
|
perf_counter tools: Define and use our own u64, s64 etc. definitions
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 20:21:42 +08:00
|
|
|
u64 start, size;
|
2009-06-09 02:12:48 +08:00
|
|
|
struct symbol *sym;
|
|
|
|
int line_len, len;
|
|
|
|
|
|
|
|
line_len = getline(&line, &n, file);
|
|
|
|
if (line_len < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (!line)
|
|
|
|
goto out_failure;
|
|
|
|
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
|
|
|
|
len = hex2u64(line, &start);
|
|
|
|
|
|
|
|
len++;
|
|
|
|
if (len + 2 >= line_len)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
len += hex2u64(line + len, &size);
|
|
|
|
|
|
|
|
len++;
|
|
|
|
if (len + 2 >= line_len)
|
|
|
|
continue;
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
sym = symbol__new(start, size, line + len);
|
2009-06-09 02:12:48 +08:00
|
|
|
|
|
|
|
if (sym == NULL)
|
|
|
|
goto out_delete_line;
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (filter && filter(map, sym))
|
2009-10-31 02:28:24 +08:00
|
|
|
symbol__delete(sym);
|
2009-06-09 02:12:48 +08:00
|
|
|
else {
|
|
|
|
dso__insert_symbol(self, sym);
|
|
|
|
nr_syms++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
free(line);
|
|
|
|
fclose(file);
|
|
|
|
|
|
|
|
return nr_syms;
|
|
|
|
|
|
|
|
out_delete_line:
|
|
|
|
free(line);
|
|
|
|
out_failure:
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
/**
|
|
|
|
* elf_symtab__for_each_symbol - iterate thru all the symbols
|
|
|
|
*
|
|
|
|
* @self: struct elf_symtab instance to iterate
|
2009-08-15 18:26:57 +08:00
|
|
|
* @idx: uint32_t idx
|
2009-05-29 01:55:04 +08:00
|
|
|
* @sym: GElf_Sym iterator
|
|
|
|
*/
|
2009-08-15 18:26:57 +08:00
|
|
|
#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
|
|
|
|
for (idx = 0, gelf_getsym(syms, idx, &sym);\
|
|
|
|
idx < nr_syms; \
|
|
|
|
idx++, gelf_getsym(syms, idx, &sym))
|
2009-05-29 01:55:04 +08:00
|
|
|
|
|
|
|
static inline uint8_t elf_sym__type(const GElf_Sym *sym)
|
|
|
|
{
|
|
|
|
return GELF_ST_TYPE(sym->st_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int elf_sym__is_function(const GElf_Sym *sym)
|
|
|
|
{
|
|
|
|
return elf_sym__type(sym) == STT_FUNC &&
|
|
|
|
sym->st_name != 0 &&
|
2009-10-06 10:35:03 +08:00
|
|
|
sym->st_shndx != SHN_UNDEF;
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
|
2009-07-02 14:08:36 +08:00
|
|
|
static inline int elf_sym__is_label(const GElf_Sym *sym)
|
|
|
|
{
|
|
|
|
return elf_sym__type(sym) == STT_NOTYPE &&
|
|
|
|
sym->st_name != 0 &&
|
|
|
|
sym->st_shndx != SHN_UNDEF &&
|
|
|
|
sym->st_shndx != SHN_ABS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline const char *elf_sec__name(const GElf_Shdr *shdr,
|
|
|
|
const Elf_Data *secstrs)
|
|
|
|
{
|
|
|
|
return secstrs->d_buf + shdr->sh_name;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int elf_sec__is_text(const GElf_Shdr *shdr,
|
|
|
|
const Elf_Data *secstrs)
|
|
|
|
{
|
|
|
|
return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
|
|
|
|
}
|
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
static inline const char *elf_sym__name(const GElf_Sym *sym,
|
|
|
|
const Elf_Data *symstrs)
|
|
|
|
{
|
|
|
|
return symstrs->d_buf + sym->st_name;
|
|
|
|
}
|
|
|
|
|
|
|
|
static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
|
|
|
|
GElf_Shdr *shp, const char *name,
|
2009-08-15 18:26:57 +08:00
|
|
|
size_t *idx)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
|
|
|
Elf_Scn *sec = NULL;
|
|
|
|
size_t cnt = 1;
|
|
|
|
|
|
|
|
while ((sec = elf_nextscn(elf, sec)) != NULL) {
|
|
|
|
char *str;
|
|
|
|
|
|
|
|
gelf_getshdr(sec, shp);
|
|
|
|
str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
|
|
|
|
if (!strcmp(name, str)) {
|
2009-08-15 18:26:57 +08:00
|
|
|
if (idx)
|
|
|
|
*idx = cnt;
|
2009-05-29 01:55:04 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
++cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sec;
|
|
|
|
}
|
|
|
|
|
2009-06-03 11:54:33 +08:00
|
|
|
#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
|
|
|
|
for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
|
|
|
|
idx < nr_entries; \
|
|
|
|
++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
|
|
|
|
|
|
|
|
#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
|
|
|
|
for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
|
|
|
|
idx < nr_entries; \
|
|
|
|
++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
|
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
/*
|
|
|
|
* We need to check if we have a .dynsym, so that we can handle the
|
|
|
|
* .plt, synthesizing its symbols, that aren't on the symtabs (be it
|
|
|
|
* .dynsym or .symtab).
|
|
|
|
* And always look at the original dso, not at debuginfo packages, that
|
|
|
|
* have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
|
|
|
|
*/
|
2009-11-16 23:48:11 +08:00
|
|
|
static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
|
|
|
|
symbol_filter_t filter)
|
2009-06-03 11:54:33 +08:00
|
|
|
{
|
|
|
|
uint32_t nr_rel_entries, idx;
|
|
|
|
GElf_Sym sym;
|
perf_counter tools: Define and use our own u64, s64 etc. definitions
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 20:21:42 +08:00
|
|
|
u64 plt_offset;
|
2009-06-03 11:54:33 +08:00
|
|
|
GElf_Shdr shdr_plt;
|
|
|
|
struct symbol *f;
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
GElf_Shdr shdr_rel_plt, shdr_dynsym;
|
2009-06-03 11:54:33 +08:00
|
|
|
Elf_Data *reldata, *syms, *symstrs;
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
|
|
|
|
size_t dynsym_idx;
|
|
|
|
GElf_Ehdr ehdr;
|
2009-06-03 11:54:33 +08:00
|
|
|
char sympltname[1024];
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
Elf *elf;
|
|
|
|
int nr = 0, symidx, fd, err = 0;
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
fd = open(self->long_name, O_RDONLY);
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
if (fd < 0)
|
|
|
|
goto out;
|
|
|
|
|
2009-10-25 00:10:36 +08:00
|
|
|
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
if (elf == NULL)
|
|
|
|
goto out_close;
|
|
|
|
|
|
|
|
if (gelf_getehdr(elf, &ehdr) == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
|
|
|
|
".dynsym", &dynsym_idx);
|
|
|
|
if (scn_dynsym == NULL)
|
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
|
2009-06-03 11:54:33 +08:00
|
|
|
".rela.plt", NULL);
|
|
|
|
if (scn_plt_rel == NULL) {
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
|
2009-06-03 11:54:33 +08:00
|
|
|
".rel.plt", NULL);
|
|
|
|
if (scn_plt_rel == NULL)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
}
|
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
err = -1;
|
|
|
|
|
2009-06-03 11:54:33 +08:00
|
|
|
if (shdr_rel_plt.sh_link != dynsym_idx)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
|
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
|
|
|
/*
|
2009-08-15 18:26:57 +08:00
|
|
|
* Fetch the relocation section to find the idxes to the GOT
|
2009-06-03 11:54:33 +08:00
|
|
|
* and the symbols in the .dynsym they refer to.
|
|
|
|
*/
|
|
|
|
reldata = elf_getdata(scn_plt_rel, NULL);
|
|
|
|
if (reldata == NULL)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
|
|
|
syms = elf_getdata(scn_dynsym, NULL);
|
|
|
|
if (syms == NULL)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
|
2009-06-03 11:54:33 +08:00
|
|
|
if (scn_symstrs == NULL)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
|
|
|
symstrs = elf_getdata(scn_symstrs, NULL);
|
|
|
|
if (symstrs == NULL)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
|
|
|
nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
|
|
|
|
plt_offset = shdr_plt.sh_offset;
|
|
|
|
|
|
|
|
if (shdr_rel_plt.sh_type == SHT_RELA) {
|
|
|
|
GElf_Rela pos_mem, *pos;
|
|
|
|
|
|
|
|
elf_section__for_each_rela(reldata, pos, pos_mem, idx,
|
|
|
|
nr_rel_entries) {
|
|
|
|
symidx = GELF_R_SYM(pos->r_info);
|
|
|
|
plt_offset += shdr_plt.sh_entsize;
|
|
|
|
gelf_getsym(syms, symidx, &sym);
|
|
|
|
snprintf(sympltname, sizeof(sympltname),
|
|
|
|
"%s@plt", elf_sym__name(&sym, symstrs));
|
|
|
|
|
|
|
|
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
|
2009-10-31 02:28:24 +08:00
|
|
|
sympltname);
|
2009-06-03 11:54:33 +08:00
|
|
|
if (!f)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
2009-11-16 23:48:11 +08:00
|
|
|
if (filter && filter(map, f))
|
|
|
|
symbol__delete(f);
|
|
|
|
else {
|
|
|
|
dso__insert_symbol(self, f);
|
|
|
|
++nr;
|
|
|
|
}
|
2009-06-03 11:54:33 +08:00
|
|
|
}
|
|
|
|
} else if (shdr_rel_plt.sh_type == SHT_REL) {
|
|
|
|
GElf_Rel pos_mem, *pos;
|
|
|
|
elf_section__for_each_rel(reldata, pos, pos_mem, idx,
|
|
|
|
nr_rel_entries) {
|
|
|
|
symidx = GELF_R_SYM(pos->r_info);
|
|
|
|
plt_offset += shdr_plt.sh_entsize;
|
|
|
|
gelf_getsym(syms, symidx, &sym);
|
|
|
|
snprintf(sympltname, sizeof(sympltname),
|
|
|
|
"%s@plt", elf_sym__name(&sym, symstrs));
|
|
|
|
|
|
|
|
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
|
2009-10-31 02:28:24 +08:00
|
|
|
sympltname);
|
2009-06-03 11:54:33 +08:00
|
|
|
if (!f)
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
goto out_elf_end;
|
2009-06-03 11:54:33 +08:00
|
|
|
|
2009-11-16 23:48:11 +08:00
|
|
|
if (filter && filter(map, f))
|
|
|
|
symbol__delete(f);
|
|
|
|
else {
|
|
|
|
dso__insert_symbol(self, f);
|
|
|
|
++nr;
|
|
|
|
}
|
2009-06-03 11:54:33 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
err = 0;
|
|
|
|
out_elf_end:
|
|
|
|
elf_end(elf);
|
|
|
|
out_close:
|
|
|
|
close(fd);
|
|
|
|
|
|
|
|
if (err == 0)
|
|
|
|
return nr;
|
|
|
|
out:
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_warning("%s: problems reading %s PLT info.\n",
|
|
|
|
__func__, self->long_name);
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
return 0;
|
2009-06-03 11:54:33 +08:00
|
|
|
}
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
static int dso__load_sym(struct dso *self, struct map *map, const char *name,
|
|
|
|
int fd, symbol_filter_t filter, int kernel,
|
2009-10-22 03:34:06 +08:00
|
|
|
int kmodule)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
2009-10-08 00:48:56 +08:00
|
|
|
struct map *curr_map = map;
|
|
|
|
struct dso *curr_dso = self;
|
|
|
|
size_t dso_name_len = strlen(self->short_name);
|
2009-07-02 14:08:36 +08:00
|
|
|
Elf_Data *symstrs, *secstrs;
|
2009-05-29 01:55:04 +08:00
|
|
|
uint32_t nr_syms;
|
|
|
|
int err = -1;
|
2009-08-15 18:26:57 +08:00
|
|
|
uint32_t idx;
|
2009-05-29 01:55:04 +08:00
|
|
|
GElf_Ehdr ehdr;
|
|
|
|
GElf_Shdr shdr;
|
|
|
|
Elf_Data *syms;
|
|
|
|
GElf_Sym sym;
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
Elf_Scn *sec, *sec_strndx;
|
2009-05-29 01:55:04 +08:00
|
|
|
Elf *elf;
|
2009-10-02 14:29:58 +08:00
|
|
|
int nr = 0;
|
2009-05-29 01:55:04 +08:00
|
|
|
|
2009-10-25 00:10:36 +08:00
|
|
|
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
|
2009-05-29 01:55:04 +08:00
|
|
|
if (elf == NULL) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("%s: cannot read %s ELF file.\n", __func__, name);
|
2009-05-29 01:55:04 +08:00
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (gelf_getehdr(elf, &ehdr) == NULL) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("%s: cannot get elf header.\n", __func__);
|
2009-05-29 01:55:04 +08:00
|
|
|
goto out_elf_end;
|
|
|
|
}
|
|
|
|
|
|
|
|
sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
|
2009-06-03 11:54:33 +08:00
|
|
|
if (sec == NULL) {
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
|
|
|
|
if (sec == NULL)
|
2009-06-03 11:54:33 +08:00
|
|
|
goto out_elf_end;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
|
|
|
|
syms = elf_getdata(sec, NULL);
|
|
|
|
if (syms == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
sec = elf_getscn(elf, shdr.sh_link);
|
|
|
|
if (sec == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
symstrs = elf_getdata(sec, NULL);
|
|
|
|
if (symstrs == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
2009-07-02 14:08:36 +08:00
|
|
|
sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
|
|
|
|
if (sec_strndx == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
secstrs = elf_getdata(sec_strndx, NULL);
|
2009-07-30 18:25:29 +08:00
|
|
|
if (secstrs == NULL)
|
2009-07-02 14:08:36 +08:00
|
|
|
goto out_elf_end;
|
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
nr_syms = shdr.sh_size / shdr.sh_entsize;
|
|
|
|
|
2009-06-07 03:22:33 +08:00
|
|
|
memset(&sym, 0, sizeof(sym));
|
2009-07-20 20:01:38 +08:00
|
|
|
if (!kernel) {
|
|
|
|
self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
|
2009-07-03 08:24:14 +08:00
|
|
|
elf_section_by_name(elf, &ehdr, &shdr,
|
|
|
|
".gnu.prelink_undo",
|
|
|
|
NULL) != NULL);
|
2009-07-20 20:01:38 +08:00
|
|
|
} else self->adjust_symbols = 0;
|
|
|
|
|
2009-08-15 18:26:57 +08:00
|
|
|
elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
|
2009-05-29 01:55:04 +08:00
|
|
|
struct symbol *f;
|
2009-08-15 18:26:57 +08:00
|
|
|
const char *elf_name;
|
2009-10-08 00:48:56 +08:00
|
|
|
char *demangled = NULL;
|
2009-07-02 14:08:36 +08:00
|
|
|
int is_label = elf_sym__is_label(&sym);
|
|
|
|
const char *section_name;
|
2009-05-29 01:55:04 +08:00
|
|
|
|
2009-07-02 14:08:36 +08:00
|
|
|
if (!is_label && !elf_sym__is_function(&sym))
|
2009-05-29 01:55:04 +08:00
|
|
|
continue;
|
|
|
|
|
|
|
|
sec = elf_getscn(elf, sym.st_shndx);
|
|
|
|
if (!sec)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
gelf_getshdr(sec, &shdr);
|
2009-07-02 14:08:36 +08:00
|
|
|
|
|
|
|
if (is_label && !elf_sec__is_text(&shdr, secstrs))
|
|
|
|
continue;
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
elf_name = elf_sym__name(&sym, symstrs);
|
2009-07-02 14:08:36 +08:00
|
|
|
section_name = elf_sec__name(&shdr, secstrs);
|
perf_counter tools: Add 'perf annotate' feature
Add new perf sub-command to display annotated source code:
$ perf annotate decode_tree_entry
------------------------------------------------
Percent | Source code & Disassembly of /home/mingo/git/git
------------------------------------------------
:
: /home/mingo/git/git: file format elf64-x86-64
:
:
: Disassembly of section .text:
:
: 00000000004a0da0 <decode_tree_entry>:
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
3.82 : 4a0da0: 41 54 push %r12
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx
: *modep = mode;
: return str;
: }
:
: static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size)
: {
0.00 : 4a0da6: 49 89 fc mov %rdi,%r12
0.00 : 4a0da9: 55 push %rbp
3.37 : 4a0daa: 53 push %rbx
: const char *path;
: unsigned int mode, len;
:
: if (size < 24 || buf[size - 21])
0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1)
3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80>
: static const char *get_mode(const char *str, unsigned int *modep)
: {
: unsigned char c;
: unsigned int mode = 0;
:
: if (*str == ' ')
1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax
0.39 : 4a0db7: 3c 20 cmp $0x20,%al
0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80>
: return NULL;
:
: while ((c = *str++) != ' ') {
0.06 : 4a0dbb: 89 c2 mov %eax,%edx
: if (c < '0' || c > '7')
1.99 : 4a0dbd: 31 ed xor %ebp,%ebp
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx
: if (c < '0' || c > '7')
0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax
0.17 : 4a0dc6: 3c 07 cmp $0x7,%al
0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37>
0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80>
0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax)
16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax
0.14 : 4a0dd3: 3c 07 cmp $0x7,%al
0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80>
: return NULL;
: mode = (mode << 3) + (c - '0');
3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax
: unsigned int mode = 0;
:
: if (*str == ' ')
: return NULL;
:
: while ((c = *str++) != ' ') {
0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx
16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx
: if (c < '0' || c > '7')
: return NULL;
: mode = (mode << 3) + (c - '0');
The first column is the percentage of samples that arrived on that
particular line - relative to the total cost of the function.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06 21:48:52 +08:00
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
if (kernel || kmodule) {
|
|
|
|
char dso_name[PATH_MAX];
|
|
|
|
|
|
|
|
if (strcmp(section_name,
|
|
|
|
curr_dso->short_name + dso_name_len) == 0)
|
|
|
|
goto new_symbol;
|
|
|
|
|
|
|
|
if (strcmp(section_name, ".text") == 0) {
|
|
|
|
curr_map = map;
|
|
|
|
curr_dso = self;
|
|
|
|
goto new_symbol;
|
|
|
|
}
|
|
|
|
|
|
|
|
snprintf(dso_name, sizeof(dso_name),
|
|
|
|
"%s%s", self->short_name, section_name);
|
|
|
|
|
|
|
|
curr_map = kernel_maps__find_by_dso_name(dso_name);
|
|
|
|
if (curr_map == NULL) {
|
|
|
|
u64 start = sym.st_value;
|
|
|
|
|
|
|
|
if (kmodule)
|
|
|
|
start += map->start + shdr.sh_offset;
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
curr_dso = dso__new(dso_name);
|
2009-10-08 00:48:56 +08:00
|
|
|
if (curr_dso == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
curr_map = map__new2(start, curr_dso);
|
|
|
|
if (curr_map == NULL) {
|
|
|
|
dso__delete(curr_dso);
|
|
|
|
goto out_elf_end;
|
|
|
|
}
|
2009-10-20 03:17:57 +08:00
|
|
|
curr_map->map_ip = identity__map_ip;
|
|
|
|
curr_map->unmap_ip = identity__map_ip;
|
2009-10-08 00:48:56 +08:00
|
|
|
curr_dso->origin = DSO__ORIG_KERNEL;
|
|
|
|
kernel_maps__insert(curr_map);
|
|
|
|
dsos__add(curr_dso);
|
|
|
|
} else
|
|
|
|
curr_dso = curr_map->dso;
|
|
|
|
|
|
|
|
goto new_symbol;
|
2009-10-06 01:26:17 +08:00
|
|
|
}
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
if (curr_dso->adjust_symbols) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_debug2("adjusting symbol: st_value: %Lx sh_addr: "
|
|
|
|
"%Lx sh_offset: %Lx\n", (u64)sym.st_value,
|
|
|
|
(u64)shdr.sh_addr, (u64)shdr.sh_offset);
|
2009-06-30 22:43:17 +08:00
|
|
|
sym.st_value -= shdr.sh_addr - shdr.sh_offset;
|
2009-10-06 01:26:17 +08:00
|
|
|
}
|
2009-07-21 01:14:12 +08:00
|
|
|
/*
|
|
|
|
* We need to figure out if the object was created from C++ sources
|
|
|
|
* DWARF DW_compile_unit has this, but we don't always have access
|
|
|
|
* to it...
|
|
|
|
*/
|
2009-08-15 18:26:57 +08:00
|
|
|
demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
|
2009-07-21 01:14:12 +08:00
|
|
|
if (demangled != NULL)
|
2009-08-15 18:26:57 +08:00
|
|
|
elf_name = demangled;
|
2009-10-08 00:48:56 +08:00
|
|
|
new_symbol:
|
2009-10-31 02:28:24 +08:00
|
|
|
f = symbol__new(sym.st_value, sym.st_size, elf_name);
|
2009-07-21 01:14:12 +08:00
|
|
|
free(demangled);
|
2009-05-29 01:55:04 +08:00
|
|
|
if (!f)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
if (filter && filter(curr_map, f))
|
2009-10-31 02:28:24 +08:00
|
|
|
symbol__delete(f);
|
2009-05-29 01:55:26 +08:00
|
|
|
else {
|
2009-10-08 00:48:56 +08:00
|
|
|
dso__insert_symbol(curr_dso, f);
|
2009-05-29 01:55:26 +08:00
|
|
|
nr++;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
/*
|
|
|
|
* For misannotated, zeroed, ASM function sizes.
|
|
|
|
*/
|
|
|
|
if (nr > 0)
|
|
|
|
dso__fixup_sym_end(self);
|
2009-05-29 01:55:04 +08:00
|
|
|
err = nr;
|
|
|
|
out_elf_end:
|
|
|
|
elf_end(elf);
|
|
|
|
out_close:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-11-11 11:51:04 +08:00
|
|
|
bool fetch_build_id_table(struct list_head *head)
|
|
|
|
{
|
|
|
|
bool have_buildid = false;
|
|
|
|
struct dso *pos;
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &dsos, node) {
|
|
|
|
struct build_id_list *new;
|
|
|
|
struct build_id_event b;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
if (filename__read_build_id(pos->long_name,
|
|
|
|
&b.build_id,
|
|
|
|
sizeof(b.build_id)) < 0)
|
|
|
|
continue;
|
|
|
|
have_buildid = true;
|
|
|
|
memset(&b.header, 0, sizeof(b.header));
|
2009-11-18 01:40:53 +08:00
|
|
|
len = pos->long_name_len + 1;
|
2009-11-11 11:51:04 +08:00
|
|
|
len = ALIGN(len, 64);
|
|
|
|
b.header.size = sizeof(b) + len;
|
|
|
|
|
|
|
|
new = malloc(sizeof(*new));
|
|
|
|
if (!new)
|
|
|
|
die("No memory\n");
|
|
|
|
|
|
|
|
memcpy(&new->event, &b, sizeof(b));
|
|
|
|
new->dso_name = pos->long_name;
|
|
|
|
new->len = len;
|
|
|
|
|
|
|
|
list_add_tail(&new->list, head);
|
|
|
|
}
|
|
|
|
|
|
|
|
return have_buildid;
|
|
|
|
}
|
|
|
|
|
2009-11-04 07:46:10 +08:00
|
|
|
int filename__read_build_id(const char *filename, void *bf, size_t size)
|
2009-08-06 06:02:49 +08:00
|
|
|
{
|
2009-11-04 07:46:10 +08:00
|
|
|
int fd, err = -1;
|
2009-08-06 06:02:49 +08:00
|
|
|
GElf_Ehdr ehdr;
|
|
|
|
GElf_Shdr shdr;
|
|
|
|
Elf_Data *build_id_data;
|
|
|
|
Elf_Scn *sec;
|
|
|
|
Elf *elf;
|
|
|
|
|
2009-11-04 07:46:10 +08:00
|
|
|
if (size < BUILD_ID_SIZE)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
fd = open(filename, O_RDONLY);
|
2009-08-06 06:02:49 +08:00
|
|
|
if (fd < 0)
|
|
|
|
goto out;
|
|
|
|
|
2009-10-25 00:10:36 +08:00
|
|
|
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
|
2009-08-06 06:02:49 +08:00
|
|
|
if (elf == NULL) {
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
|
2009-08-06 06:02:49 +08:00
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (gelf_getehdr(elf, &ehdr) == NULL) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("%s: cannot get elf header.\n", __func__);
|
2009-08-06 06:02:49 +08:00
|
|
|
goto out_elf_end;
|
|
|
|
}
|
|
|
|
|
2009-11-04 07:46:10 +08:00
|
|
|
sec = elf_section_by_name(elf, &ehdr, &shdr,
|
|
|
|
".note.gnu.build-id", NULL);
|
2009-08-06 06:02:49 +08:00
|
|
|
if (sec == NULL)
|
|
|
|
goto out_elf_end;
|
|
|
|
|
|
|
|
build_id_data = elf_getdata(sec, NULL);
|
|
|
|
if (build_id_data == NULL)
|
|
|
|
goto out_elf_end;
|
2009-11-04 07:46:10 +08:00
|
|
|
memcpy(bf, build_id_data->d_buf + 16, BUILD_ID_SIZE);
|
|
|
|
err = BUILD_ID_SIZE;
|
|
|
|
out_elf_end:
|
|
|
|
elf_end(elf);
|
|
|
|
out_close:
|
|
|
|
close(fd);
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-08-07 01:43:17 +08:00
|
|
|
char dso__symtab_origin(const struct dso *self)
|
|
|
|
{
|
|
|
|
static const char origin[] = {
|
|
|
|
[DSO__ORIG_KERNEL] = 'k',
|
|
|
|
[DSO__ORIG_JAVA_JIT] = 'j',
|
|
|
|
[DSO__ORIG_FEDORA] = 'f',
|
|
|
|
[DSO__ORIG_UBUNTU] = 'u',
|
|
|
|
[DSO__ORIG_BUILDID] = 'b',
|
|
|
|
[DSO__ORIG_DSO] = 'd',
|
2009-10-02 14:29:58 +08:00
|
|
|
[DSO__ORIG_KMODULE] = 'K',
|
2009-08-07 01:43:17 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
|
|
|
|
return '!';
|
|
|
|
return origin[self->origin];
|
|
|
|
}
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
2009-08-06 06:02:49 +08:00
|
|
|
int size = PATH_MAX;
|
2009-11-19 06:20:50 +08:00
|
|
|
char *name = malloc(size);
|
|
|
|
u8 build_id[BUILD_ID_SIZE];
|
2009-05-29 01:55:04 +08:00
|
|
|
int ret = -1;
|
|
|
|
int fd;
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
self->loaded = 1;
|
2009-10-29 07:51:21 +08:00
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
if (!name)
|
|
|
|
return -1;
|
|
|
|
|
2009-07-03 08:24:14 +08:00
|
|
|
self->adjust_symbols = 0;
|
2009-06-30 22:43:17 +08:00
|
|
|
|
2009-08-07 01:43:17 +08:00
|
|
|
if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
|
2009-10-22 03:34:06 +08:00
|
|
|
ret = dso__load_perf_map(self, map, filter);
|
2009-08-07 01:43:17 +08:00
|
|
|
self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
|
|
|
|
DSO__ORIG_NOT_FOUND;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
self->origin = DSO__ORIG_FEDORA - 1;
|
2009-06-09 02:12:48 +08:00
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
more:
|
|
|
|
do {
|
2009-08-07 01:43:17 +08:00
|
|
|
self->origin++;
|
|
|
|
switch (self->origin) {
|
|
|
|
case DSO__ORIG_FEDORA:
|
2009-10-02 14:29:58 +08:00
|
|
|
snprintf(name, size, "/usr/lib/debug%s.debug",
|
|
|
|
self->long_name);
|
2009-05-29 01:55:04 +08:00
|
|
|
break;
|
2009-08-07 01:43:17 +08:00
|
|
|
case DSO__ORIG_UBUNTU:
|
2009-10-02 14:29:58 +08:00
|
|
|
snprintf(name, size, "/usr/lib/debug%s",
|
|
|
|
self->long_name);
|
2009-05-29 01:55:04 +08:00
|
|
|
break;
|
2009-08-07 01:43:17 +08:00
|
|
|
case DSO__ORIG_BUILDID:
|
2009-11-19 06:20:50 +08:00
|
|
|
if (filename__read_build_id(self->long_name, build_id,
|
|
|
|
sizeof(build_id))) {
|
|
|
|
char build_id_hex[BUILD_ID_SIZE * 2 + 1];
|
|
|
|
|
|
|
|
build_id__sprintf(build_id, sizeof(build_id),
|
|
|
|
build_id_hex);
|
2009-08-06 06:02:49 +08:00
|
|
|
snprintf(name, size,
|
|
|
|
"/usr/lib/debug/.build-id/%.2s/%s.debug",
|
2009-11-19 06:20:50 +08:00
|
|
|
build_id_hex, build_id_hex + 2);
|
|
|
|
if (self->has_build_id)
|
|
|
|
goto compare_build_id;
|
|
|
|
break;
|
2009-08-06 06:02:49 +08:00
|
|
|
}
|
2009-08-07 01:43:17 +08:00
|
|
|
self->origin++;
|
2009-08-06 06:02:49 +08:00
|
|
|
/* Fall thru */
|
2009-08-07 01:43:17 +08:00
|
|
|
case DSO__ORIG_DSO:
|
2009-10-02 14:29:58 +08:00
|
|
|
snprintf(name, size, "%s", self->long_name);
|
2009-05-29 01:55:04 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
if (self->has_build_id) {
|
2009-11-19 06:20:50 +08:00
|
|
|
if (filename__read_build_id(name, build_id,
|
|
|
|
sizeof(build_id)) < 0)
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
goto more;
|
|
|
|
compare_build_id:
|
2009-11-19 06:20:50 +08:00
|
|
|
if (memcmp(build_id, self->build_id,
|
|
|
|
sizeof(self->build_id)) != 0)
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
goto more;
|
|
|
|
}
|
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
fd = open(name, O_RDONLY);
|
|
|
|
} while (fd < 0);
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
ret = dso__load_sym(self, map, name, fd, filter, 0, 0);
|
2009-05-29 01:55:04 +08:00
|
|
|
close(fd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
|
|
|
|
*/
|
|
|
|
if (!ret)
|
|
|
|
goto more;
|
|
|
|
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
if (ret > 0) {
|
2009-11-16 23:48:11 +08:00
|
|
|
int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
|
perf_counter tools: PLT info is stripped in -debuginfo packages
So we need to get the richer .symtab from the debuginfo
packages but the PLT info from the original DSO where we have
just the leaner .dynsym symtab.
Example:
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > before
| [acme@doppio pahole]$ perf report --sort comm,dso,symbol > after
| [acme@doppio pahole]$ diff -U1 before after
| --- before 2009-07-11 11:04:22.688595741 -0300
| +++ after 2009-07-11 11:04:33.380595676 -0300
| @@ -80,3 +80,2 @@
| 0.07% pahole ./build/pahole [.] pahole_stealer
| - 0.06% pahole /usr/lib64/libdw-0.141.so [.] 0x00000000007140
| 0.06% pahole /usr/lib64/libdw-0.141.so [.] __libdw_getabbrev
| @@ -91,2 +90,3 @@
| 0.06% pahole [kernel] [k] free_hot_cold_page
| + 0.06% pahole /usr/lib64/libdw-0.141.so [.] tfind@plt
| 0.05% pahole ./build/libdwarves.so.1.0.0 [.] ftype__add_parameter
| @@ -242,2 +242,3 @@
| 0.01% pahole [kernel] [k] account_group_user_time
| + 0.01% pahole /usr/lib64/libdw-0.141.so [.] strlen@plt
| 0.01% pahole ./build/pahole [.] strcmp@plt
| [acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1247325517-12272-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-11 23:18:36 +08:00
|
|
|
if (nr_plt > 0)
|
|
|
|
ret += nr_plt;
|
|
|
|
}
|
2009-05-29 01:55:04 +08:00
|
|
|
out:
|
|
|
|
free(name);
|
2009-08-12 04:04:36 +08:00
|
|
|
if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
|
|
|
|
return 0;
|
2009-05-29 01:55:04 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
struct map *kernel_map;
|
|
|
|
|
|
|
|
static void kernel_maps__insert(struct map *map)
|
2009-07-02 14:08:36 +08:00
|
|
|
{
|
2009-10-02 14:29:58 +08:00
|
|
|
maps__insert(&kernel_maps, map);
|
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp)
|
|
|
|
{
|
|
|
|
struct map *map = maps__find(&kernel_maps, ip);
|
2009-10-08 00:48:56 +08:00
|
|
|
|
|
|
|
if (mapp)
|
|
|
|
*mapp = map;
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
if (map) {
|
|
|
|
ip = map->map_ip(map, ip);
|
2009-10-08 00:48:56 +08:00
|
|
|
return map->dso->find_symbol(map->dso, ip);
|
2009-10-02 14:29:58 +08:00
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-08 00:48:56 +08:00
|
|
|
return NULL;
|
2009-10-02 14:29:58 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
struct map *kernel_maps__find_by_dso_name(const char *name)
|
|
|
|
{
|
|
|
|
struct rb_node *nd;
|
|
|
|
|
|
|
|
for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
|
|
|
|
struct map *map = rb_entry(nd, struct map, rb_node);
|
|
|
|
|
|
|
|
if (map->dso && strcmp(map->dso->name, name) == 0)
|
|
|
|
return map;
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dso__load_module_sym(struct dso *self, struct map *map,
|
2009-10-22 03:34:06 +08:00
|
|
|
symbol_filter_t filter)
|
2009-10-02 14:29:58 +08:00
|
|
|
{
|
|
|
|
int err = 0, fd = open(self->long_name, O_RDONLY);
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
self->loaded = 1;
|
2009-10-29 07:51:21 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (fd < 0) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("%s: cannot open %s\n", __func__, self->long_name);
|
2009-07-02 14:08:36 +08:00
|
|
|
return err;
|
2009-10-02 14:29:58 +08:00
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1);
|
2009-07-02 14:08:36 +08:00
|
|
|
close(fd);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter)
|
2009-07-02 14:08:36 +08:00
|
|
|
{
|
2009-10-02 14:29:58 +08:00
|
|
|
struct dirent *dent;
|
|
|
|
int nr_symbols = 0, err;
|
|
|
|
DIR *dir = opendir(dirname);
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (!dir) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_err("%s: cannot open %s dir\n", __func__, dirname);
|
2009-10-02 14:29:58 +08:00
|
|
|
return -1;
|
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
while ((dent = readdir(dir)) != NULL) {
|
|
|
|
char path[PATH_MAX];
|
|
|
|
|
|
|
|
if (dent->d_type == DT_DIR) {
|
|
|
|
if (!strcmp(dent->d_name, ".") ||
|
|
|
|
!strcmp(dent->d_name, ".."))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
snprintf(path, sizeof(path), "%s/%s",
|
|
|
|
dirname, dent->d_name);
|
2009-10-22 03:34:06 +08:00
|
|
|
err = dsos__load_modules_sym_dir(path, filter);
|
2009-10-02 14:29:58 +08:00
|
|
|
if (err < 0)
|
|
|
|
goto failure;
|
|
|
|
} else {
|
|
|
|
char *dot = strrchr(dent->d_name, '.'),
|
|
|
|
dso_name[PATH_MAX];
|
|
|
|
struct map *map;
|
|
|
|
struct rb_node *last;
|
2009-11-18 01:40:53 +08:00
|
|
|
char *long_name;
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
if (dot == NULL || strcmp(dot, ".ko"))
|
|
|
|
continue;
|
|
|
|
snprintf(dso_name, sizeof(dso_name), "[%.*s]",
|
|
|
|
(int)(dot - dent->d_name), dent->d_name);
|
|
|
|
|
2009-10-06 01:26:18 +08:00
|
|
|
strxfrchar(dso_name, '-', '_');
|
2009-10-02 14:29:58 +08:00
|
|
|
map = kernel_maps__find_by_dso_name(dso_name);
|
|
|
|
if (map == NULL)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
snprintf(path, sizeof(path), "%s/%s",
|
|
|
|
dirname, dent->d_name);
|
|
|
|
|
2009-11-18 01:40:53 +08:00
|
|
|
long_name = strdup(path);
|
|
|
|
if (long_name == NULL)
|
2009-10-02 14:29:58 +08:00
|
|
|
goto failure;
|
2009-11-18 01:40:53 +08:00
|
|
|
dso__set_long_name(map->dso, long_name);
|
|
|
|
dso__set_basename(map->dso);
|
2009-10-02 14:29:58 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
err = dso__load_module_sym(map->dso, map, filter);
|
2009-10-02 14:29:58 +08:00
|
|
|
if (err < 0)
|
|
|
|
goto failure;
|
|
|
|
last = rb_last(&map->dso->syms);
|
|
|
|
if (last) {
|
|
|
|
struct symbol *sym;
|
2009-10-08 00:48:56 +08:00
|
|
|
/*
|
|
|
|
* We do this here as well, even having the
|
|
|
|
* symbol size found in the symtab because
|
|
|
|
* misannotated ASM symbols may have the size
|
|
|
|
* set to zero.
|
|
|
|
*/
|
|
|
|
dso__fixup_sym_end(map->dso);
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
sym = rb_entry(last, struct symbol, rb_node);
|
|
|
|
map->end = map->start + sym->end;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
nr_symbols += err;
|
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
return nr_symbols;
|
|
|
|
failure:
|
|
|
|
closedir(dir);
|
|
|
|
return -1;
|
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
static int dsos__load_modules_sym(symbol_filter_t filter)
|
2009-10-02 14:29:58 +08:00
|
|
|
{
|
|
|
|
struct utsname uts;
|
|
|
|
char modules_path[PATH_MAX];
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (uname(&uts) < 0)
|
|
|
|
return -1;
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
|
|
|
|
uts.release);
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
return dsos__load_modules_sym_dir(modules_path, filter);
|
2009-07-02 14:08:36 +08:00
|
|
|
}
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
/*
|
|
|
|
* Constructor variant for modules (where we know from /proc/modules where
|
|
|
|
* they are loaded) and for vmlinux, where only after we load all the
|
|
|
|
* symbols we'll know where it starts and ends.
|
|
|
|
*/
|
|
|
|
static struct map *map__new2(u64 start, struct dso *dso)
|
2009-07-02 14:08:36 +08:00
|
|
|
{
|
2009-10-02 14:29:58 +08:00
|
|
|
struct map *self = malloc(sizeof(*self));
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (self != NULL) {
|
|
|
|
/*
|
2009-10-31 02:28:23 +08:00
|
|
|
* ->end will be filled after we load all the symbols
|
2009-10-02 14:29:58 +08:00
|
|
|
*/
|
2009-10-31 02:28:23 +08:00
|
|
|
map__init(self, start, 0, 0, dso);
|
2009-10-02 14:29:58 +08:00
|
|
|
}
|
2009-10-31 02:28:23 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
return self;
|
|
|
|
}
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
static int dsos__load_modules(void)
|
2009-10-02 14:29:58 +08:00
|
|
|
{
|
|
|
|
char *line = NULL;
|
|
|
|
size_t n;
|
|
|
|
FILE *file = fopen("/proc/modules", "r");
|
|
|
|
struct map *map;
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
if (file == NULL)
|
|
|
|
return -1;
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
while (!feof(file)) {
|
|
|
|
char name[PATH_MAX];
|
|
|
|
u64 start;
|
|
|
|
struct dso *dso;
|
|
|
|
char *sep;
|
|
|
|
int line_len;
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
line_len = getline(&line, &n, file);
|
|
|
|
if (line_len < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (!line)
|
|
|
|
goto out_failure;
|
|
|
|
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
|
|
|
|
sep = strrchr(line, 'x');
|
|
|
|
if (sep == NULL)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
hex2u64(sep + 1, &start);
|
|
|
|
|
|
|
|
sep = strchr(line, ' ');
|
|
|
|
if (sep == NULL)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
*sep = '\0';
|
|
|
|
|
|
|
|
snprintf(name, sizeof(name), "[%s]", line);
|
2009-10-31 02:28:24 +08:00
|
|
|
dso = dso__new(name);
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
if (dso == NULL)
|
|
|
|
goto out_delete_line;
|
|
|
|
|
|
|
|
map = map__new2(start, dso);
|
|
|
|
if (map == NULL) {
|
|
|
|
dso__delete(dso);
|
|
|
|
goto out_delete_line;
|
2009-07-02 14:08:36 +08:00
|
|
|
}
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
dso->origin = DSO__ORIG_KMODULE;
|
|
|
|
kernel_maps__insert(map);
|
|
|
|
dsos__add(dso);
|
2009-07-02 14:08:36 +08:00
|
|
|
}
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
free(line);
|
|
|
|
fclose(file);
|
|
|
|
|
2009-10-06 01:26:17 +08:00
|
|
|
return 0;
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
out_delete_line:
|
|
|
|
free(line);
|
|
|
|
out_failure:
|
|
|
|
return -1;
|
2009-07-02 14:08:36 +08:00
|
|
|
}
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
static int dso__load_vmlinux(struct dso *self, struct map *map,
|
2009-10-22 03:34:06 +08:00
|
|
|
const char *vmlinux, symbol_filter_t filter)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
|
|
|
int err, fd = open(vmlinux, O_RDONLY);
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
self->loaded = 1;
|
2009-10-29 07:51:21 +08:00
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
if (fd < 0)
|
|
|
|
return -1;
|
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0);
|
2009-07-02 14:08:36 +08:00
|
|
|
|
2009-05-29 01:55:04 +08:00
|
|
|
close(fd);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
int dsos__load_kernel(const char *vmlinux, symbol_filter_t filter,
|
|
|
|
int use_modules)
|
2009-05-29 01:55:19 +08:00
|
|
|
{
|
|
|
|
int err = -1;
|
2009-10-31 02:28:24 +08:00
|
|
|
struct dso *dso = dso__new(vmlinux);
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
if (dso == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
dso->short_name = "[kernel]";
|
|
|
|
kernel_map = map__new2(0, dso);
|
|
|
|
if (kernel_map == NULL)
|
|
|
|
goto out_delete_dso;
|
|
|
|
|
2009-10-20 03:17:57 +08:00
|
|
|
kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
|
2009-05-29 01:55:19 +08:00
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
if (use_modules && dsos__load_modules() < 0) {
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_warning("Failed to load list of modules in use! "
|
|
|
|
"Continuing...\n");
|
2009-10-06 01:26:17 +08:00
|
|
|
use_modules = 0;
|
|
|
|
}
|
|
|
|
|
2009-07-02 14:08:36 +08:00
|
|
|
if (vmlinux) {
|
2009-10-22 03:34:06 +08:00
|
|
|
err = dso__load_vmlinux(dso, kernel_map, vmlinux, filter);
|
2009-09-23 17:20:58 +08:00
|
|
|
if (err > 0 && use_modules) {
|
2009-10-22 03:34:06 +08:00
|
|
|
int syms = dsos__load_modules_sym(filter);
|
2009-09-23 17:20:58 +08:00
|
|
|
|
2009-10-06 01:26:17 +08:00
|
|
|
if (syms < 0)
|
2009-10-22 03:34:06 +08:00
|
|
|
pr_warning("Failed to read module symbols!"
|
|
|
|
" Continuing...\n");
|
2009-10-06 01:26:17 +08:00
|
|
|
else
|
|
|
|
err += syms;
|
2009-09-23 17:20:58 +08:00
|
|
|
}
|
2009-07-02 14:08:36 +08:00
|
|
|
}
|
2009-05-29 01:55:19 +08:00
|
|
|
|
2009-07-02 14:05:58 +08:00
|
|
|
if (err <= 0)
|
2009-10-22 03:34:06 +08:00
|
|
|
err = kernel_maps__load_kallsyms(filter, use_modules);
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
if (err > 0) {
|
|
|
|
struct rb_node *node = rb_first(&dso->syms);
|
|
|
|
struct symbol *sym = rb_entry(node, struct symbol, rb_node);
|
2009-05-29 01:55:19 +08:00
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
kernel_map->start = sym->start;
|
|
|
|
node = rb_last(&dso->syms);
|
|
|
|
sym = rb_entry(node, struct symbol, rb_node);
|
|
|
|
kernel_map->end = sym->end;
|
|
|
|
|
|
|
|
dso->origin = DSO__ORIG_KERNEL;
|
2009-10-08 00:48:56 +08:00
|
|
|
kernel_maps__insert(kernel_map);
|
2009-10-02 14:29:58 +08:00
|
|
|
/*
|
2009-10-08 00:48:56 +08:00
|
|
|
* Now that we have all sorted out, just set the ->end of all
|
|
|
|
* maps:
|
2009-10-02 14:29:58 +08:00
|
|
|
*/
|
2009-10-08 00:48:56 +08:00
|
|
|
kernel_maps__fixup_end();
|
2009-10-02 14:29:58 +08:00
|
|
|
dsos__add(dso);
|
2009-10-06 01:26:17 +08:00
|
|
|
|
2009-10-22 03:34:06 +08:00
|
|
|
if (verbose)
|
|
|
|
kernel_maps__fprintf(stderr);
|
2009-10-02 14:29:58 +08:00
|
|
|
}
|
2009-08-07 01:43:17 +08:00
|
|
|
|
2009-05-29 01:55:19 +08:00
|
|
|
return err;
|
2009-10-02 14:29:58 +08:00
|
|
|
|
|
|
|
out_delete_dso:
|
|
|
|
dso__delete(dso);
|
|
|
|
return -1;
|
2009-05-29 01:55:19 +08:00
|
|
|
}
|
|
|
|
|
2009-08-12 16:03:49 +08:00
|
|
|
LIST_HEAD(dsos);
|
|
|
|
struct dso *vdso;
|
|
|
|
|
2009-08-15 18:26:57 +08:00
|
|
|
const char *vmlinux_name = "vmlinux";
|
2009-08-12 16:03:49 +08:00
|
|
|
int modules;
|
|
|
|
|
|
|
|
static void dsos__add(struct dso *dso)
|
|
|
|
{
|
|
|
|
list_add_tail(&dso->node, &dsos);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct dso *dsos__find(const char *name)
|
|
|
|
{
|
|
|
|
struct dso *pos;
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &dsos, node)
|
|
|
|
if (strcmp(pos->name, name) == 0)
|
|
|
|
return pos;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
struct dso *dsos__findnew(const char *name)
|
2009-08-12 16:03:49 +08:00
|
|
|
{
|
|
|
|
struct dso *dso = dsos__find(name);
|
|
|
|
|
2009-10-21 00:25:40 +08:00
|
|
|
if (!dso) {
|
2009-10-31 02:28:24 +08:00
|
|
|
dso = dso__new(name);
|
2009-11-18 01:40:53 +08:00
|
|
|
if (dso != NULL) {
|
2009-10-21 00:25:40 +08:00
|
|
|
dsos__add(dso);
|
2009-11-18 01:40:53 +08:00
|
|
|
dso__set_basename(dso);
|
|
|
|
}
|
2009-10-29 07:51:21 +08:00
|
|
|
}
|
2009-08-12 16:03:49 +08:00
|
|
|
|
|
|
|
return dso;
|
|
|
|
}
|
|
|
|
|
|
|
|
void dsos__fprintf(FILE *fp)
|
|
|
|
{
|
|
|
|
struct dso *pos;
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &dsos, node)
|
|
|
|
dso__fprintf(pos, fp);
|
|
|
|
}
|
|
|
|
|
2009-11-17 02:32:44 +08:00
|
|
|
size_t dsos__fprintf_buildid(FILE *fp)
|
|
|
|
{
|
|
|
|
struct dso *pos;
|
|
|
|
size_t ret = 0;
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &dsos, node) {
|
|
|
|
ret += dso__fprintf_buildid(pos, fp);
|
2009-11-17 07:45:25 +08:00
|
|
|
ret += fprintf(fp, " %s\n", pos->long_name);
|
2009-11-17 02:32:44 +08:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
int load_kernel(symbol_filter_t filter)
|
2009-08-12 16:03:49 +08:00
|
|
|
{
|
2009-10-31 02:28:24 +08:00
|
|
|
if (dsos__load_kernel(vmlinux_name, filter, modules) <= 0)
|
2009-08-12 16:03:49 +08:00
|
|
|
return -1;
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
vdso = dso__new("[vdso]");
|
2009-08-12 16:03:49 +08:00
|
|
|
if (!vdso)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
dsos__add(vdso);
|
|
|
|
|
2009-10-02 14:29:58 +08:00
|
|
|
return 0;
|
2009-08-12 16:03:49 +08:00
|
|
|
}
|
|
|
|
|
2009-10-31 02:28:24 +08:00
|
|
|
void symbol__init(unsigned int priv_size)
|
2009-05-29 01:55:04 +08:00
|
|
|
{
|
|
|
|
elf_version(EV_CURRENT);
|
2009-10-31 02:28:24 +08:00
|
|
|
symbol__priv_size = priv_size;
|
2009-05-29 01:55:04 +08:00
|
|
|
}
|