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tracing/stack-tracer: fix style issues 

Impact: cleanup

Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Török Edwin 2008-11-23 12:39:06 +02:00 committed by Ingo Molnar
parent b54d3de9f3
commit 8d7c6a9616
3 changed files with 33 additions and 27 deletions
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51
arch/x86/kernel/stacktrace.c
View File

@ -89,7 +89,7 @@ EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
struct stack_frame {
const void __user *next_fp;
unsigned long return_address;
unsigned long ret_addr;
};
static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
@ -108,33 +108,40 @@ static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
return ret;
}
static inline void __save_stack_trace_user(struct stack_trace *trace)
{
const struct pt_regs *regs = task_pt_regs(current);
const void __user *fp = (const void __user *)regs->bp;
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = regs->ip;
while (trace->nr_entries < trace->max_entries) {
struct stack_frame frame;
frame.next_fp = NULL;
frame.ret_addr = 0;
if (!copy_stack_frame(fp, &frame))
break;
if ((unsigned long)fp < regs->sp)
break;
if (frame.ret_addr) {
trace->entries[trace->nr_entries++] =
frame.ret_addr;
}
if (fp == frame.next_fp)
break;
fp = frame.next_fp;
}
}
void save_stack_trace_user(struct stack_trace *trace)
{
/*
* Trace user stack if we are not a kernel thread
*/
if (current->mm) {
const struct pt_regs *regs = task_pt_regs(current);
const void __user *fp = (const void __user *)regs->bp;
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = regs->ip;
while (trace->nr_entries < trace->max_entries) {
struct stack_frame frame;
frame.next_fp = NULL;
frame.return_address = 0;
if (!copy_stack_frame(fp, &frame))
break;
if ((unsigned long)fp < regs->sp)
break;
if (frame.return_address)
trace->entries[trace->nr_entries++] =
frame.return_address;
if (fp == frame.next_fp)
break;
fp = frame.next_fp;
}
__save_stack_trace_user(trace);
}
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;

2
include/linux/stacktrace.h
View File

@ -25,7 +25,7 @@ extern void save_stack_trace_user(struct stack_trace *trace);
#else
# define save_stack_trace(trace) do { } while (0)
# define save_stack_trace_tsk(tsk, trace) do { } while (0)
# define save_stack_trace_user(trace) do { } while (0)
# define save_stack_trace_user(trace) do { } while (0)
# define print_stack_trace(trace, spaces) do { } while (0)
#endif

7
kernel/trace/trace.c
View File

@ -948,9 +948,9 @@ static void ftrace_trace_userstack(struct trace_array *tr,
struct trace_array_cpu *data,
unsigned long flags, int pc)
{
struct ring_buffer_event *event;
struct userstack_entry *entry;
struct stack_trace trace;
struct ring_buffer_event *event;
unsigned long irq_flags;
if (!(trace_flags & TRACE_ITER_USERSTACKTRACE))
@ -1471,8 +1471,7 @@ static inline int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
if (file) {
ret = trace_seq_path(s, &file->f_path);
if (ret)
ret = trace_seq_printf(s, "[+0x%lx]",
ip - vmstart);
ret = trace_seq_printf(s, "[+0x%lx]", ip - vmstart);
}
if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
@ -1485,7 +1484,7 @@ seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
{
struct mm_struct *mm = NULL;
int ret = 1;
unsigned i;
unsigned int i;
if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
struct task_struct *task;