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//===-- sanitizer_allocator.cc --------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
// This allocator that is used inside run-times.
//===----------------------------------------------------------------------===//
#include "sanitizer_common.h"
// FIXME: We should probably use more low-level allocator that would
// mmap some pages and split them into chunks to fulfill requests.
#include <stdlib.h>
namespace __sanitizer {
static const u64 kInternalAllocBlockMagic = 0x7A6CB03ABCEBC042ull;
void *InternalAlloc(uptr size) {
void *p = malloc(size + sizeof(u64));
((u64*)p)[0] = kInternalAllocBlockMagic;
return (char*)p + sizeof(u64);
}
void InternalFree(void *addr) {
if (!addr) return;
addr = (char*)addr - sizeof(u64);
CHECK_EQ(((u64*)addr)[0], kInternalAllocBlockMagic);
((u64*)addr)[0] = 0;
free(addr);
}
} // namespace __sanitizer
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