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📄 hwasan.cpp(15.25 KB)
📄 hwasan.h(5.69 KB)
📄 hwasan.syms.extra(21 B)
📄 hwasan_allocator.cpp(13.71 KB)
📄 hwasan_allocator.h(3.26 KB)
📄 hwasan_blacklist.txt(282 B)
📄 hwasan_checks.h(4.04 KB)
📄 hwasan_dynamic_shadow.cpp(5.17 KB)
📄 hwasan_dynamic_shadow.h(838 B)
📄 hwasan_exceptions.cpp(2.68 KB)
📄 hwasan_flags.h(799 B)
📄 hwasan_flags.inc(3.27 KB)
📄 hwasan_globals.cpp(3.03 KB)
📄 hwasan_globals.h(1.85 KB)
📄 hwasan_interceptors.cpp(11.1 KB)
📄 hwasan_interceptors_vfork.S(409 B)
📄 hwasan_interface_internal.h(6.32 KB)
📄 hwasan_linux.cpp(15.83 KB)
📄 hwasan_malloc_bisect.h(1.67 KB)
📄 hwasan_mapping.h(2.01 KB)
📄 hwasan_memintrinsics.cpp(1.6 KB)
📄 hwasan_new_delete.cpp(2.29 KB)
📄 hwasan_poisoning.cpp(1.89 KB)
📄 hwasan_poisoning.h(756 B)
📄 hwasan_report.cpp(24.11 KB)
📄 hwasan_report.h(1.2 KB)
📄 hwasan_setjmp.S(2.81 KB)
📄 hwasan_tag_mismatch_aarch64.S(5.89 KB)
📄 hwasan_thread.cpp(3.9 KB)
📄 hwasan_thread.h(2.82 KB)
📄 hwasan_thread_list.cpp(442 B)
📄 hwasan_thread_list.h(6.2 KB)
📄 hwasan_type_test.cpp(918 B)

Editing: hwasan_malloc_bisect.h

//===-- hwasan_malloc_bisect.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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of HWAddressSanitizer.
//
//===----------------------------------------------------------------------===//

#include "sanitizer_common/sanitizer_hash.h"
#include "hwasan.h"

namespace __hwasan {

static u32 malloc_hash(StackTrace *stack, uptr orig_size) {
  uptr len = Min(stack->size, (unsigned)7);
  MurMur2HashBuilder H(len);
  H.add(orig_size);
  // Start with frame #1 to skip __sanitizer_malloc frame, which is
  // (a) almost always the same (well, could be operator new or new[])
  // (b) can change hashes when compiler-rt is rebuilt, invalidating previous
  // bisection results.
  // Because of ASLR, use only offset inside the page.
  for (uptr i = 1; i < len; ++i) H.add(((u32)stack->trace[i]) & 0xFFF);
  return H.get();
}

static INLINE bool malloc_bisect(StackTrace *stack, uptr orig_size) {
  uptr left = flags()->malloc_bisect_left;
  uptr right = flags()->malloc_bisect_right;
  if (LIKELY(left == 0 && right == 0))
    return true;
  if (!stack)
    return true;
  // Allow malloc_bisect_right > (u32)(-1) to avoid spelling the latter in
  // decimal.
  uptr h = (uptr)malloc_hash(stack, orig_size);
  if (h < left || h > right)
    return false;
  if (flags()->malloc_bisect_dump) {
    Printf("[alloc] %u %zu\n", h, orig_size);
    stack->Print();
  }
  return true;
}

}  // namespace __hwasan

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Editing: hwasan_malloc_bisect.h

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