28219f7f99
The following patch is result of libsanitizer/merge.sh from c425db2eb558c263 (yesterday evening). Bootstrapped/regtested on x86_64-linux and i686-linux (together with the follow-up 3 patches I'm about to post). BTW, seems upstream has added riscv64 support for I think lsan/tsan, so if anyone is willing to try it there, it would be a matter of copying e.g. the s390*-*-linux* libsanitizer/configure.tgt entry to riscv64-*-linux* with the obvious s/s390x/riscv64/ change in it.
113 lines
5.6 KiB
C++
113 lines
5.6 KiB
C++
//===-- asan_interceptors_memintrinsics.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 AddressSanitizer, an address sanity checker.
|
|
//
|
|
// ASan-private header for asan_interceptors_memintrinsics.cpp
|
|
//===---------------------------------------------------------------------===//
|
|
#ifndef ASAN_MEMINTRIN_H
|
|
#define ASAN_MEMINTRIN_H
|
|
|
|
#include "asan_interface_internal.h"
|
|
#include "asan_internal.h"
|
|
#include "asan_mapping.h"
|
|
#include "interception/interception.h"
|
|
|
|
DECLARE_REAL(void *, memcpy, void *to, const void *from, uptr size)
|
|
DECLARE_REAL(void *, memset, void *block, int c, uptr size)
|
|
|
|
namespace __asan {
|
|
|
|
// Return true if we can quickly decide that the region is unpoisoned.
|
|
// We assume that a redzone is at least 16 bytes.
|
|
static inline bool QuickCheckForUnpoisonedRegion(uptr beg, uptr size) {
|
|
if (UNLIKELY(size == 0 || size > sizeof(uptr) * ASAN_SHADOW_GRANULARITY))
|
|
return !size;
|
|
|
|
uptr last = beg + size - 1;
|
|
uptr shadow_first = MEM_TO_SHADOW(beg);
|
|
uptr shadow_last = MEM_TO_SHADOW(last);
|
|
uptr uptr_first = RoundDownTo(shadow_first, sizeof(uptr));
|
|
uptr uptr_last = RoundDownTo(shadow_last, sizeof(uptr));
|
|
if (LIKELY(((*reinterpret_cast<const uptr *>(uptr_first) |
|
|
*reinterpret_cast<const uptr *>(uptr_last)) == 0)))
|
|
return true;
|
|
u8 shadow = AddressIsPoisoned(last);
|
|
for (; shadow_first < shadow_last; ++shadow_first)
|
|
shadow |= *((u8 *)shadow_first);
|
|
return !shadow;
|
|
}
|
|
|
|
struct AsanInterceptorContext {
|
|
const char *interceptor_name;
|
|
};
|
|
|
|
// We implement ACCESS_MEMORY_RANGE, ASAN_READ_RANGE,
|
|
// and ASAN_WRITE_RANGE as macro instead of function so
|
|
// that no extra frames are created, and stack trace contains
|
|
// relevant information only.
|
|
// We check all shadow bytes.
|
|
#define ACCESS_MEMORY_RANGE(ctx, offset, size, isWrite) \
|
|
do { \
|
|
uptr __offset = (uptr)(offset); \
|
|
uptr __size = (uptr)(size); \
|
|
uptr __bad = 0; \
|
|
if (UNLIKELY(__offset > __offset + __size)) { \
|
|
GET_STACK_TRACE_FATAL_HERE; \
|
|
ReportStringFunctionSizeOverflow(__offset, __size, &stack); \
|
|
} \
|
|
if (UNLIKELY(!QuickCheckForUnpoisonedRegion(__offset, __size)) && \
|
|
(__bad = __asan_region_is_poisoned(__offset, __size))) { \
|
|
AsanInterceptorContext *_ctx = (AsanInterceptorContext *)ctx; \
|
|
bool suppressed = false; \
|
|
if (_ctx) { \
|
|
suppressed = IsInterceptorSuppressed(_ctx->interceptor_name); \
|
|
if (!suppressed && HaveStackTraceBasedSuppressions()) { \
|
|
GET_STACK_TRACE_FATAL_HERE; \
|
|
suppressed = IsStackTraceSuppressed(&stack); \
|
|
} \
|
|
} \
|
|
if (!suppressed) { \
|
|
GET_CURRENT_PC_BP_SP; \
|
|
ReportGenericError(pc, bp, sp, __bad, isWrite, __size, 0, false); \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
#define ASAN_READ_RANGE(ctx, offset, size) \
|
|
ACCESS_MEMORY_RANGE(ctx, offset, size, false)
|
|
#define ASAN_WRITE_RANGE(ctx, offset, size) \
|
|
ACCESS_MEMORY_RANGE(ctx, offset, size, true)
|
|
|
|
// Behavior of functions like "memcpy" or "strcpy" is undefined
|
|
// if memory intervals overlap. We report error in this case.
|
|
// Macro is used to avoid creation of new frames.
|
|
static inline bool RangesOverlap(const char *offset1, uptr length1,
|
|
const char *offset2, uptr length2) {
|
|
return !((offset1 + length1 <= offset2) || (offset2 + length2 <= offset1));
|
|
}
|
|
#define CHECK_RANGES_OVERLAP(name, _offset1, length1, _offset2, length2) \
|
|
do { \
|
|
const char *offset1 = (const char *)_offset1; \
|
|
const char *offset2 = (const char *)_offset2; \
|
|
if (UNLIKELY(RangesOverlap(offset1, length1, offset2, length2))) { \
|
|
GET_STACK_TRACE_FATAL_HERE; \
|
|
bool suppressed = IsInterceptorSuppressed(name); \
|
|
if (!suppressed && HaveStackTraceBasedSuppressions()) { \
|
|
suppressed = IsStackTraceSuppressed(&stack); \
|
|
} \
|
|
if (!suppressed) { \
|
|
ReportStringFunctionMemoryRangesOverlap(name, offset1, length1, \
|
|
offset2, length2, &stack); \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
} // namespace __asan
|
|
|
|
#endif // ASAN_MEMINTRIN_H
|