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[TSan] Add interceptor for malloc_usable_size() 

llvm-svn: 176013
This commit is contained in:
Alexey Samsonov 2013-02-25 08:43:10 +00:00
parent 10bccda948
commit 85f0a7e644
5 changed files with 28 additions and 0 deletions
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5
compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
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@ -403,6 +403,11 @@ TSAN_INTERCEPTOR(void, cfree, void *p) {
user_free(thr, pc, p);
}
TSAN_INTERCEPTOR(uptr, malloc_usable_size, void *p) {
SCOPED_INTERCEPTOR_RAW(malloc_usable_size, p);
return user_alloc_usable_size(thr, pc, p);
}
#define OPERATOR_NEW_BODY(mangled_name) \
if (cur_thread()->in_symbolizer) \
return __libc_malloc(size); \

8
compiler-rt/lib/tsan/rtl/tsan_mman.cc
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@ -127,6 +127,14 @@ void *user_realloc(ThreadState *thr, uptr pc, void *p, uptr sz) {
return p2;
}
uptr user_alloc_usable_size(ThreadState *thr, uptr pc, void *p) {
CHECK_GT(thr->in_rtl, 0);
if (p == 0)
return 0;
MBlock *b = (MBlock*)allocator()->GetMetaData(p);
return (b) ? b->size : 0;
}
MBlock *user_mblock(ThreadState *thr, void *p) {
CHECK_NE(p, (void*)0);
Allocator *a = allocator();

1
compiler-rt/lib/tsan/rtl/tsan_mman.h
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@ -31,6 +31,7 @@ void *user_alloc(ThreadState *thr, uptr pc, uptr sz,
void user_free(ThreadState *thr, uptr pc, void *p);
void *user_realloc(ThreadState *thr, uptr pc, void *p, uptr sz);
void *user_alloc_aligned(ThreadState *thr, uptr pc, uptr sz, uptr align);
uptr user_alloc_usable_size(ThreadState *thr, uptr pc, void *p);
// Given the pointer p into a valid allocated block,
// returns the descriptor of the block.
MBlock *user_mblock(ThreadState *thr, void *p);

1
compiler-rt/lib/tsan/rtl/tsan_stat.h
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@ -102,6 +102,7 @@ enum StatType {
StatInt_realloc,
StatInt_free,
StatInt_cfree,
StatInt_malloc_usable_size,
StatInt_mmap,
StatInt_mmap64,
StatInt_munmap,

13
compiler-rt/lib/tsan/tests/unit/tsan_mman_test.cc
View File

@ -117,6 +117,19 @@ TEST(Mman, UserRealloc) {
}
}
TEST(Mman, UsableSize) {
ScopedInRtl in_rtl;
ThreadState *thr = cur_thread();
uptr pc = 0;
char *p = (char*)user_alloc(thr, pc, 10);
char *p2 = (char*)user_alloc(thr, pc, 20);
EXPECT_EQ(0U, user_alloc_usable_size(thr, pc, NULL));
EXPECT_EQ(10U, user_alloc_usable_size(thr, pc, p));
EXPECT_EQ(20U, user_alloc_usable_size(thr, pc, p2));
user_free(thr, pc, p);
user_free(thr, pc, p2);
}
TEST(Mman, Stats) {
ScopedInRtl in_rtl;
ThreadState *thr = cur_thread();