Hi all
I just write a small MemoryHook library with c++ and use as preload.But
every time I start running, there is a big memory allocation,the size is
72704.I try to find all related library in ldd list, but no size is 72704.
The usage is like this:
LD_PRELOAD=./libPreload.so ./XXX
My initialize code:
* static void TraceInitialize()*
* {#ifdef _DEBUG fprintf( stderr, "call TraceInitialize\n" );
#endif pthread_mutex_lock( &s_mutexInit ); if ( s_status ==
TS_INITIALIZED ) { pthread_mutex_unlock( &s_mutexInit ); return; }
s_status = TS_INITIALIZING; MemoryManager::initialize();
s_pRealMalloc = (FUNC_MALLOC)dlsym(RTLD_NEXT, "malloc");
s_pRealCalloc = (FUNC_CALLOC)dlsym(RTLD_NEXT, "calloc");
s_pRealRealloc = (FUNC_REALLOC)dlsym(RTLD_NEXT, "realloc");
s_pRealMemalign = (FUNC_MEMALIGN)dlsym(RTLD_NEXT, "memalign");
s_pRealValloc = (FUNC_VALLOC)dlsym(RTLD_NEXT, "valloc");
s_pRealFree = (FUNC_FREE)dlsym(RTLD_NEXT, "free"); assert(
!( NULL == s_pRealMalloc || NULL == s_pRealCalloc || NULL == s_pRealRealloc
|| NULL == s_pRealMemalign || NULL == s_pRealValloc ||
NULL == s_pRealFree ) ); s_status = TS_INITIALIZED; //
printMap(); pthread_mutex_unlock( &s_mutexInit ); }*
and trace malloc call:
* static int s_no_hook = 0;*
* void* TraceMalloc( size_t size ) { if ( s_status ==
TS_INITIALIZING ) return mockMemory::_mockMalloc( size ); if (
s_status != TS_INITIALIZED ) TraceInitialize(); void* p =
_impMalloc( size, __sync_fetch_and_add( &s_no_hook, 1 ) );
__sync_fetch_and_sub( &s_no_hook, 1 ); return p; }*
And there is an additional problem that can't count the memory release of
static global variables.I can't find a suitable time to do this,even with
__attribute__ ((destructor(101))).
How can I fix these two bugs?
Complete code link:
https://github.com/ddkv587/MemoryHook
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