1ee3d1ef10
Introduce the libhwasan library from LLVM sources.
166 lines
5.7 KiB
C++
166 lines
5.7 KiB
C++
//===-- hwasan.h ------------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of HWAddressSanitizer.
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//
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// Private Hwasan header.
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//===----------------------------------------------------------------------===//
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#ifndef HWASAN_H
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#define HWASAN_H
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#include "sanitizer_common/sanitizer_flags.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "hwasan_interface_internal.h"
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#include "hwasan_flags.h"
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#include "ubsan/ubsan_platform.h"
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#ifndef HWASAN_CONTAINS_UBSAN
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# define HWASAN_CONTAINS_UBSAN CAN_SANITIZE_UB
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#endif
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#ifndef HWASAN_WITH_INTERCEPTORS
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#define HWASAN_WITH_INTERCEPTORS 0
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#endif
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#ifndef HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE
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#define HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE HWASAN_WITH_INTERCEPTORS
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#endif
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typedef u8 tag_t;
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// TBI (Top Byte Ignore) feature of AArch64: bits [63:56] are ignored in address
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// translation and can be used to store a tag.
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const unsigned kAddressTagShift = 56;
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const uptr kAddressTagMask = 0xFFUL << kAddressTagShift;
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// Minimal alignment of the shadow base address. Determines the space available
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// for threads and stack histories. This is an ABI constant.
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const unsigned kShadowBaseAlignment = 32;
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const unsigned kRecordAddrBaseTagShift = 3;
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const unsigned kRecordFPShift = 48;
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const unsigned kRecordFPLShift = 4;
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const unsigned kRecordFPModulus = 1 << (64 - kRecordFPShift + kRecordFPLShift);
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static inline tag_t GetTagFromPointer(uptr p) {
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return p >> kAddressTagShift;
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}
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static inline uptr UntagAddr(uptr tagged_addr) {
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return tagged_addr & ~kAddressTagMask;
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}
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static inline void *UntagPtr(const void *tagged_ptr) {
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return reinterpret_cast<void *>(
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UntagAddr(reinterpret_cast<uptr>(tagged_ptr)));
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}
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static inline uptr AddTagToPointer(uptr p, tag_t tag) {
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return (p & ~kAddressTagMask) | ((uptr)tag << kAddressTagShift);
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}
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namespace __hwasan {
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extern int hwasan_inited;
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extern bool hwasan_init_is_running;
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extern int hwasan_report_count;
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bool InitShadow();
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void InitPrctl();
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void InitThreads();
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void InitializeInterceptors();
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void HwasanAllocatorInit();
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void *hwasan_malloc(uptr size, StackTrace *stack);
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void *hwasan_calloc(uptr nmemb, uptr size, StackTrace *stack);
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void *hwasan_realloc(void *ptr, uptr size, StackTrace *stack);
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void *hwasan_reallocarray(void *ptr, uptr nmemb, uptr size, StackTrace *stack);
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void *hwasan_valloc(uptr size, StackTrace *stack);
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void *hwasan_pvalloc(uptr size, StackTrace *stack);
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void *hwasan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack);
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void *hwasan_memalign(uptr alignment, uptr size, StackTrace *stack);
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int hwasan_posix_memalign(void **memptr, uptr alignment, uptr size,
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StackTrace *stack);
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void hwasan_free(void *ptr, StackTrace *stack);
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void InstallAtExitHandler();
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#define GET_MALLOC_STACK_TRACE \
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BufferedStackTrace stack; \
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if (hwasan_inited) \
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stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), \
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nullptr, common_flags()->fast_unwind_on_malloc, \
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common_flags()->malloc_context_size)
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#define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \
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BufferedStackTrace stack; \
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if (hwasan_inited) \
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stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal)
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#define GET_FATAL_STACK_TRACE_HERE \
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GET_FATAL_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
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#define PRINT_CURRENT_STACK_CHECK() \
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{ \
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GET_FATAL_STACK_TRACE_HERE; \
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stack.Print(); \
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}
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void HwasanTSDInit();
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void HwasanTSDThreadInit();
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void HwasanOnDeadlySignal(int signo, void *info, void *context);
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void UpdateMemoryUsage();
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void AppendToErrorMessageBuffer(const char *buffer);
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void AndroidTestTlsSlot();
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} // namespace __hwasan
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#define HWASAN_MALLOC_HOOK(ptr, size) \
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do { \
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if (&__sanitizer_malloc_hook) { \
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__sanitizer_malloc_hook(ptr, size); \
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} \
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RunMallocHooks(ptr, size); \
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} while (false)
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#define HWASAN_FREE_HOOK(ptr) \
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do { \
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if (&__sanitizer_free_hook) { \
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__sanitizer_free_hook(ptr); \
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} \
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RunFreeHooks(ptr); \
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} while (false)
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#if HWASAN_WITH_INTERCEPTORS && defined(__aarch64__)
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// For both bionic and glibc __sigset_t is an unsigned long.
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typedef unsigned long __hw_sigset_t;
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// Setjmp and longjmp implementations are platform specific, and hence the
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// interception code is platform specific too. As yet we've only implemented
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// the interception for AArch64.
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typedef unsigned long long __hw_register_buf[22];
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struct __hw_jmp_buf_struct {
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// NOTE: The machine-dependent definition of `__sigsetjmp'
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// assume that a `__hw_jmp_buf' begins with a `__hw_register_buf' and that
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// `__mask_was_saved' follows it. Do not move these members or add others
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// before it.
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__hw_register_buf __jmpbuf; // Calling environment.
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int __mask_was_saved; // Saved the signal mask?
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__hw_sigset_t __saved_mask; // Saved signal mask.
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};
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typedef struct __hw_jmp_buf_struct __hw_jmp_buf[1];
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typedef struct __hw_jmp_buf_struct __hw_sigjmp_buf[1];
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#endif // HWASAN_WITH_INTERCEPTORS && __aarch64__
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#endif // HWASAN_H
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