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Use __builtin_frame_address instead of poking into setjmp's jmp_buf to start the stack trace. b=323853 r+sr=bryner

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dbaron%dbaron.org 2006-03-22 07:29:45 +00:00
parent 45b704978a
commit 76010360ad
1 changed files with 4 additions and 17 deletions
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21
tools/jprof/stub/libmalloc.cpp
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@ -71,7 +71,6 @@
#include "jprof.h"
#include <string.h>
#include <errno.h>
#include <setjmp.h>
#include <dlfcn.h>
@ -82,12 +81,6 @@ extern r_debug _r_debug;
#include <link.h>
#endif
#ifdef NTO
#define JB_BP 0x08
#include <setjmp.h>
#endif
static int gLogFD = -1;
static pthread_t main_thread;
@ -98,13 +91,9 @@ static int enableRTCSignals(bool enable);
//----------------------------------------------------------------------
#if defined(i386) || defined(_i386)
static void CrawlStack(malloc_log_entry* me, jmp_buf jb, char* first)
static void CrawlStack(malloc_log_entry* me, void* frame_ptr, char* first)
{
#ifdef NTO
u_long* bp = (u_long*) (jb[0].__jmpbuf_un.__savearea[JB_BP]);
#else
u_long* bp = (u_long*) (jb[0].__jmpbuf[JB_BP]);
#endif
u_long* bp = (u_long*)frame_ptr;
u_long numpcs = 0;
#ifdef JPROF_PTHREAD_HACK
@ -191,9 +180,7 @@ Log(u_long aTime, char *first)
me.delTime = aTime;
jmp_buf jb;
setjmp(jb);
CrawlStack(&me, jb, first);
CrawlStack(&me, __builtin_frame_address(0), first);
#ifndef NTO
write(gLogFD, &me, offsetof(malloc_log_entry, pcs) + me.numpcs*sizeof(char*));
@ -340,7 +327,7 @@ void *mystry)
startSignalCounter(timerMiliSec);
}
void setupProfilingStuff(void)
NS_EXPORT_(void) setupProfilingStuff(void)
{
static int gFirstTime = 1;
if(gFirstTime && !(gFirstTime=0)) {