80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
|
//===-- sanitizer_allocator_dlsym.h -----------------------------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// Hack: Sanitizer initializer calls dlsym which may need to allocate and call
|
||
|
|
// back into uninitialized sanitizer.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef SANITIZER_ALLOCATOR_DLSYM_H
|
||
|
|
#define SANITIZER_ALLOCATOR_DLSYM_H
|
||
|
|
|
||
|
|
#include "sanitizer_allocator_internal.h"
|
||
|
|
|
||
|
|
namespace __sanitizer {
|
||
|
|
|
||
|
|
template <typename Details>
|
||
|
|
struct DlSymAllocator {
|
||
|
|
static bool Use() {
|
||
|
|
// Fuchsia doesn't use dlsym-based interceptors.
|
||
|
|
return !SANITIZER_FUCHSIA && UNLIKELY(Details::UseImpl());
|
||
|
|
}
|
||
|
|
|
||
|
|
static bool PointerIsMine(const void *ptr) {
|
||
|
|
// Fuchsia doesn't use dlsym-based interceptors.
|
||
|
|
return !SANITIZER_FUCHSIA &&
|
||
|
|
UNLIKELY(internal_allocator()->FromPrimary(ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *Allocate(uptr size_in_bytes) {
|
||
|
|
void *ptr = InternalAlloc(size_in_bytes, nullptr, kWordSize);
|
||
|
|
CHECK(internal_allocator()->FromPrimary(ptr));
|
||
|
|
Details::OnAllocate(ptr,
|
||
|
|
internal_allocator()->GetActuallyAllocatedSize(ptr));
|
||
|
|
return ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *Callocate(SIZE_T nmemb, SIZE_T size) {
|
||
|
|
void *ptr = InternalCalloc(nmemb, size);
|
||
|
|
CHECK(internal_allocator()->FromPrimary(ptr));
|
||
|
|
Details::OnAllocate(ptr,
|
||
|
|
internal_allocator()->GetActuallyAllocatedSize(ptr));
|
||
|
|
return ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Free(void *ptr) {
|
||
|
|
uptr size = internal_allocator()->GetActuallyAllocatedSize(ptr);
|
||
|
|
Details::OnFree(ptr, size);
|
||
|
|
InternalFree(ptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *Realloc(void *ptr, uptr new_size) {
|
||
|
|
if (!ptr)
|
||
|
|
return Allocate(new_size);
|
||
|
|
CHECK(internal_allocator()->FromPrimary(ptr));
|
||
|
|
if (!new_size) {
|
||
|
|
Free(ptr);
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
uptr size = internal_allocator()->GetActuallyAllocatedSize(ptr);
|
||
|
|
uptr memcpy_size = Min(new_size, size);
|
||
|
|
void *new_ptr = Allocate(new_size);
|
||
|
|
if (new_ptr)
|
||
|
|
internal_memcpy(new_ptr, ptr, memcpy_size);
|
||
|
|
Free(ptr);
|
||
|
|
return new_ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void OnAllocate(const void *ptr, uptr size) {}
|
||
|
|
static void OnFree(const void *ptr, uptr size) {}
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace __sanitizer
|
||
|
|
|
||
|
|
#endif // SANITIZER_ALLOCATOR_DLSYM_H
|