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perf debug: Move dump_stack() and sighandler_dump_stack() to debug.h

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Two more out of util.h.

Link: http://lkml.kernel.org/n/tip-polkuxm1cpr06lbgue5pyqum@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-04-19 16:21:59 -03:00
parent bb8c16db43
commit 8c2b7cac78
4 changed files with 34 additions and 35 deletions
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32
tools/perf/util/debug.c
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@ -8,7 +8,9 @@
#include <stdio.h>
#include <api/debug.h>
#include <linux/time64.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
#endif
#include "cache.h"
#include "color.h"
#include "event.h"
@ -248,3 +250,31 @@ void perf_debug_setup(void)
{
libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
}
/* Obtain a backtrace and print it to stdout. */
#ifdef HAVE_BACKTRACE_SUPPORT
void dump_stack(void)
{
void *array[16];
size_t size = backtrace(array, ARRAY_SIZE(array));
char **strings = backtrace_symbols(array, size);
size_t i;
printf("Obtained %zd stack frames.\n", size);
for (i = 0; i < size; i++)
printf("%s\n", strings[i]);
free(strings);
}
#else
void dump_stack(void) {}
#endif
void sighandler_dump_stack(int sig)
{
psignal(sig, "perf");
dump_stack();
signal(sig, SIG_DFL);
raise(sig);
}

3
tools/perf/util/debug.h
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@ -56,4 +56,7 @@ int perf_debug_option(const char *str);
void perf_debug_setup(void);
int perf_quiet_option(void);
void dump_stack(void);
void sighandler_dump_stack(int sig);
#endif /* __PERF_DEBUG_H */

31
tools/perf/util/util.c
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@ -4,9 +4,6 @@
#include <api/fs/fs.h>
#include <sys/mman.h>
#include <sys/utsname.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
#endif
#include <dirent.h>
#include <inttypes.h>
#include <signal.h>
@ -353,34 +350,6 @@ int hex2u64(const char *ptr, u64 *long_val)
return p - ptr;
}
/* Obtain a backtrace and print it to stdout. */
#ifdef HAVE_BACKTRACE_SUPPORT
void dump_stack(void)
{
void *array[16];
size_t size = backtrace(array, ARRAY_SIZE(array));
char **strings = backtrace_symbols(array, size);
size_t i;
printf("Obtained %zd stack frames.\n", size);
for (i = 0; i < size; i++)
printf("%s\n", strings[i]);
free(strings);
}
#else
void dump_stack(void) {}
#endif
void sighandler_dump_stack(int sig)
{
psignal(sig, "perf");
dump_stack();
signal(sig, SIG_DFL);
raise(sig);
}
unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
{
struct parse_tag *i = tags;

3
tools/perf/util/util.h
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@ -80,9 +80,6 @@ void event_attr_init(struct perf_event_attr *attr);
size_t hex_width(u64 v);
int hex2u64(const char *ptr, u64 *val);
void dump_stack(void);
void sighandler_dump_stack(int sig);
extern unsigned int page_size;
extern int cacheline_size;
extern int sysctl_perf_event_max_stack;