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perf machine: Add a kallsyms loading constructor 

To reduce the boilerplate for searching for functions in the running
kernel and modules.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-93iqzayafpaxaguoiwjqezgz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-01-05 15:31:48 -03:00
parent d5f805c096
commit 7d132caaf9
2 changed files with 20 additions and 0 deletions
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19
tools/perf/util/machine.c
View File

@ -87,6 +87,25 @@ struct machine *machine__new_host(void)
return NULL;
}
struct machine *machine__new_kallsyms(void)
{
struct machine *machine = machine__new_host();
/*
* FIXME:
* 1) MAP__FUNCTION will go away when we stop loading separate maps for
* functions and data objects.
* 2) We should switch to machine__load_kallsyms(), i.e. not explicitely
* ask for not using the kcore parsing code, once this one is fixed
* to create a map per module.
*/
if (machine && __machine__load_kallsyms(machine, "/proc/kallsyms", MAP__FUNCTION, true) <= 0) {
machine__delete(machine);
machine = NULL;
}
return machine;
}
static void dsos__purge(struct dsos *dsos)
{
struct dso *pos, *n;

1
tools/perf/util/machine.h
View File

@ -129,6 +129,7 @@ char *machine__mmap_name(struct machine *machine, char *bf, size_t size);
void machines__set_comm_exec(struct machines *machines, bool comm_exec);
struct machine *machine__new_host(void);
struct machine *machine__new_kallsyms(void);
int machine__init(struct machine *machine, const char *root_dir, pid_t pid);
void machine__exit(struct machine *machine);
void machine__delete_threads(struct machine *machine);