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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_exceptions.cpp

//===-- hwasan_exceptions.cpp ---------------------------------------------===//
//
// 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.
//
// HWAddressSanitizer runtime.
//===----------------------------------------------------------------------===//

#include "hwasan_poisoning.h"
#include "sanitizer_common/sanitizer_common.h"

#include <unwind.h>

using namespace __hwasan;
using namespace __sanitizer;

typedef _Unwind_Reason_Code PersonalityFn(int version, _Unwind_Action actions,
                                          uint64_t exception_class,
                                          _Unwind_Exception* unwind_exception,
                                          _Unwind_Context* context);

// Pointers to the _Unwind_GetGR and _Unwind_GetCFA functions are passed in
// instead of being called directly. This is to handle cases where the unwinder
// is statically linked and the sanitizer runtime and the program are linked
// against different unwinders. The _Unwind_Context data structure is opaque so
// it may be incompatible between unwinders.
typedef _Unwind_Word GetGRFn(_Unwind_Context* context, int index);
typedef _Unwind_Word GetCFAFn(_Unwind_Context* context);

extern "C" SANITIZER_INTERFACE_ATTRIBUTE _Unwind_Reason_Code
__hwasan_personality_wrapper(int version, _Unwind_Action actions,
                             uint64_t exception_class,
                             _Unwind_Exception* unwind_exception,
                             _Unwind_Context* context,
                             PersonalityFn* real_personality, GetGRFn* get_gr,
                             GetCFAFn* get_cfa) {
  _Unwind_Reason_Code rc;
  if (real_personality)
    rc = real_personality(version, actions, exception_class, unwind_exception,
                          context);
  else
    rc = _URC_CONTINUE_UNWIND;

// We only untag frames without a landing pad because landing pads are
  // responsible for untagging the stack themselves if they resume.
  //
  // Here we assume that the frame record appears after any locals. This is not
  // required by AAPCS but is a requirement for HWASAN instrumented functions.
  if ((actions & _UA_CLEANUP_PHASE) && rc == _URC_CONTINUE_UNWIND) {
#if defined(__x86_64__)
    uptr fp = get_gr(context, 6); // rbp
#elif defined(__aarch64__)
    uptr fp = get_gr(context, 29); // x29
#else
#error Unsupported architecture
#endif
    uptr sp = get_cfa(context);
    TagMemory(sp, fp - sp, 0);
  }

return rc;
}

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Editing: hwasan_exceptions.cpp

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