forked from OSchip/llvm-project
33 lines
890 B
C
33 lines
890 B
C
// RUN: %clang_dfsan -fno-sanitize=dataflow -DCALLOC -c %s -o %t-calloc.o
|
|
// RUN: %clang_dfsan %s %t-calloc.o -o %t
|
|
// RUN: %run %t
|
|
//
|
|
// Tests that calling mmap() during during dfsan initialization works.
|
|
|
|
#include <assert.h>
|
|
#include <sanitizer/dfsan_interface.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef CALLOC
|
|
|
|
// dfsan_init() installs interceptors via dlysm(), which calls calloc().
|
|
// Calling mmap() from here should work even if interceptors haven't been fully
|
|
// set up yet.
|
|
void *calloc(size_t Num, size_t Size) {
|
|
size_t PageSize = getpagesize();
|
|
Size = Size * Num;
|
|
Size = (Size + PageSize - 1) & ~(PageSize - 1); // Round up to PageSize.
|
|
void *Ret = mmap(NULL, Size, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
assert(Ret != MAP_FAILED);
|
|
return Ret;
|
|
}
|
|
|
|
#else
|
|
|
|
int main() { return 0; }
|
|
|
|
#endif // CALLOC
|