600 lines
22 KiB
C++
600 lines
22 KiB
C++
//===-- asan_errors.cpp -----------------------------------------*- 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 implementation for error structures.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "asan_errors.h"
|
|
#include "asan_descriptions.h"
|
|
#include "asan_mapping.h"
|
|
#include "asan_report.h"
|
|
#include "asan_stack.h"
|
|
#include "sanitizer_common/sanitizer_stackdepot.h"
|
|
|
|
namespace __asan {
|
|
|
|
static void OnStackUnwind(const SignalContext &sig,
|
|
const void *callback_context,
|
|
BufferedStackTrace *stack) {
|
|
bool fast = common_flags()->fast_unwind_on_fatal;
|
|
#if SANITIZER_FREEBSD || SANITIZER_NETBSD
|
|
// On FreeBSD the slow unwinding that leverages _Unwind_Backtrace()
|
|
// yields the call stack of the signal's handler and not of the code
|
|
// that raised the signal (as it does on Linux).
|
|
fast = true;
|
|
#endif
|
|
// Tests and maybe some users expect that scariness is going to be printed
|
|
// just before the stack. As only asan has scariness score we have no
|
|
// corresponding code in the sanitizer_common and we use this callback to
|
|
// print it.
|
|
static_cast<const ScarinessScoreBase *>(callback_context)->Print();
|
|
stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context,
|
|
fast);
|
|
}
|
|
|
|
void ErrorDeadlySignal::Print() {
|
|
ReportDeadlySignal(signal, tid, &OnStackUnwind, &scariness);
|
|
}
|
|
|
|
void ErrorDoubleFree::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: attempting %s on %p in thread %s:\n",
|
|
scariness.GetDescription(), (void *)addr_description.addr,
|
|
AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
scariness.Print();
|
|
GET_STACK_TRACE_FATAL(second_free_stack->trace[0],
|
|
second_free_stack->top_frame_bp);
|
|
stack.Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), &stack);
|
|
}
|
|
|
|
void ErrorNewDeleteTypeMismatch::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: %s on %p in thread %s:\n",
|
|
scariness.GetDescription(), (void *)addr_description.addr,
|
|
AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s object passed to delete has wrong type:\n", d.Default());
|
|
if (delete_size != 0) {
|
|
Printf(
|
|
" size of the allocated type: %zd bytes;\n"
|
|
" size of the deallocated type: %zd bytes.\n",
|
|
addr_description.chunk_access.chunk_size, delete_size);
|
|
}
|
|
const uptr user_alignment =
|
|
addr_description.chunk_access.user_requested_alignment;
|
|
if (delete_alignment != user_alignment) {
|
|
char user_alignment_str[32];
|
|
char delete_alignment_str[32];
|
|
internal_snprintf(user_alignment_str, sizeof(user_alignment_str),
|
|
"%zd bytes", user_alignment);
|
|
internal_snprintf(delete_alignment_str, sizeof(delete_alignment_str),
|
|
"%zd bytes", delete_alignment);
|
|
static const char *kDefaultAlignment = "default-aligned";
|
|
Printf(
|
|
" alignment of the allocated type: %s;\n"
|
|
" alignment of the deallocated type: %s.\n",
|
|
user_alignment > 0 ? user_alignment_str : kDefaultAlignment,
|
|
delete_alignment > 0 ? delete_alignment_str : kDefaultAlignment);
|
|
}
|
|
CHECK_GT(free_stack->size, 0);
|
|
scariness.Print();
|
|
GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
|
|
stack.Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), &stack);
|
|
Report(
|
|
"HINT: if you don't care about these errors you may set "
|
|
"ASAN_OPTIONS=new_delete_type_mismatch=0\n");
|
|
}
|
|
|
|
void ErrorFreeNotMalloced::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: attempting free on address "
|
|
"which was not malloc()-ed: %p in thread %s\n",
|
|
(void *)addr_description.Address(), AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
CHECK_GT(free_stack->size, 0);
|
|
scariness.Print();
|
|
GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
|
|
stack.Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), &stack);
|
|
}
|
|
|
|
void ErrorAllocTypeMismatch::Print() {
|
|
static const char *alloc_names[] = {"INVALID", "malloc", "operator new",
|
|
"operator new []"};
|
|
static const char *dealloc_names[] = {"INVALID", "free", "operator delete",
|
|
"operator delete []"};
|
|
CHECK_NE(alloc_type, dealloc_type);
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: %s (%s vs %s) on %p\n",
|
|
scariness.GetDescription(), alloc_names[alloc_type],
|
|
dealloc_names[dealloc_type], (void *)addr_description.Address());
|
|
Printf("%s", d.Default());
|
|
CHECK_GT(dealloc_stack->size, 0);
|
|
scariness.Print();
|
|
GET_STACK_TRACE_FATAL(dealloc_stack->trace[0], dealloc_stack->top_frame_bp);
|
|
stack.Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), &stack);
|
|
Report(
|
|
"HINT: if you don't care about these errors you may set "
|
|
"ASAN_OPTIONS=alloc_dealloc_mismatch=0\n");
|
|
}
|
|
|
|
void ErrorMallocUsableSizeNotOwned::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: attempting to call malloc_usable_size() for "
|
|
"pointer which is not owned: %p\n",
|
|
(void *)addr_description.Address());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorSanitizerGetAllocatedSizeNotOwned::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: attempting to call "
|
|
"__sanitizer_get_allocated_size() for pointer which is not owned: %p\n",
|
|
(void *)addr_description.Address());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorCallocOverflow::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: calloc parameters overflow: count * size "
|
|
"(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
|
|
count, size, AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorReallocArrayOverflow::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: reallocarray parameters overflow: count * size "
|
|
"(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
|
|
count, size, AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorPvallocOverflow::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: pvalloc parameters overflow: size 0x%zx "
|
|
"rounded up to system page size 0x%zx cannot be represented in type "
|
|
"size_t (thread %s)\n",
|
|
size, GetPageSizeCached(), AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorInvalidAllocationAlignment::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: invalid allocation alignment: %zd, "
|
|
"alignment must be a power of two (thread %s)\n",
|
|
alignment, AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorInvalidAlignedAllocAlignment::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
#if SANITIZER_POSIX
|
|
Report("ERROR: AddressSanitizer: invalid alignment requested in "
|
|
"aligned_alloc: %zd, alignment must be a power of two and the "
|
|
"requested size 0x%zx must be a multiple of alignment "
|
|
"(thread %s)\n", alignment, size, AsanThreadIdAndName(tid).c_str());
|
|
#else
|
|
Report("ERROR: AddressSanitizer: invalid alignment requested in "
|
|
"aligned_alloc: %zd, the requested size 0x%zx must be a multiple of "
|
|
"alignment (thread %s)\n", alignment, size,
|
|
AsanThreadIdAndName(tid).c_str());
|
|
#endif
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorInvalidPosixMemalignAlignment::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: invalid alignment requested in posix_memalign: "
|
|
"%zd, alignment must be a power of two and a multiple of sizeof(void*) "
|
|
"== %zd (thread %s)\n",
|
|
alignment, sizeof(void *), AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorAllocationSizeTooBig::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: requested allocation size 0x%zx (0x%zx after "
|
|
"adjustments for alignment, red zones etc.) exceeds maximum supported "
|
|
"size of 0x%zx (thread %s)\n",
|
|
user_size, total_size, max_size, AsanThreadIdAndName(tid).c_str());
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorRssLimitExceeded::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: specified RSS limit exceeded, currently set to "
|
|
"soft_rss_limit_mb=%zd\n", common_flags()->soft_rss_limit_mb);
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorOutOfMemory::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
ERROR_OOM("allocator is trying to allocate 0x%zx bytes\n", requested_size);
|
|
Printf("%s", d.Default());
|
|
stack->Print();
|
|
PrintHintAllocatorCannotReturnNull();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorStringFunctionMemoryRangesOverlap::Print() {
|
|
Decorator d;
|
|
char bug_type[100];
|
|
internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function);
|
|
Printf("%s", d.Error());
|
|
Report(
|
|
"ERROR: AddressSanitizer: %s: memory ranges [%p,%p) and [%p, %p) "
|
|
"overlap\n",
|
|
bug_type, (void *)addr1_description.Address(),
|
|
(void *)(addr1_description.Address() + length1),
|
|
(void *)addr2_description.Address(),
|
|
(void *)(addr2_description.Address() + length2));
|
|
Printf("%s", d.Default());
|
|
scariness.Print();
|
|
stack->Print();
|
|
addr1_description.Print();
|
|
addr2_description.Print();
|
|
ReportErrorSummary(bug_type, stack);
|
|
}
|
|
|
|
void ErrorStringFunctionSizeOverflow::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: %s: (size=%zd)\n",
|
|
scariness.GetDescription(), size);
|
|
Printf("%s", d.Default());
|
|
scariness.Print();
|
|
stack->Print();
|
|
addr_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorBadParamsToAnnotateContiguousContainer::Print() {
|
|
Report(
|
|
"ERROR: AddressSanitizer: bad parameters to "
|
|
"__sanitizer_annotate_contiguous_container:\n"
|
|
" beg : %p\n"
|
|
" end : %p\n"
|
|
" old_mid : %p\n"
|
|
" new_mid : %p\n",
|
|
(void *)beg, (void *)end, (void *)old_mid, (void *)new_mid);
|
|
uptr granularity = ASAN_SHADOW_GRANULARITY;
|
|
if (!IsAligned(beg, granularity))
|
|
Report("ERROR: beg is not aligned by %zu\n", granularity);
|
|
stack->Print();
|
|
ReportErrorSummary(scariness.GetDescription(), stack);
|
|
}
|
|
|
|
void ErrorODRViolation::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: %s (%p):\n", scariness.GetDescription(),
|
|
(void *)global1.beg);
|
|
Printf("%s", d.Default());
|
|
InternalScopedString g1_loc;
|
|
InternalScopedString g2_loc;
|
|
PrintGlobalLocation(&g1_loc, global1);
|
|
PrintGlobalLocation(&g2_loc, global2);
|
|
Printf(" [1] size=%zd '%s' %s\n", global1.size,
|
|
MaybeDemangleGlobalName(global1.name), g1_loc.data());
|
|
Printf(" [2] size=%zd '%s' %s\n", global2.size,
|
|
MaybeDemangleGlobalName(global2.name), g2_loc.data());
|
|
if (stack_id1 && stack_id2) {
|
|
Printf("These globals were registered at these points:\n");
|
|
Printf(" [1]:\n");
|
|
StackDepotGet(stack_id1).Print();
|
|
Printf(" [2]:\n");
|
|
StackDepotGet(stack_id2).Print();
|
|
}
|
|
Report(
|
|
"HINT: if you don't care about these errors you may set "
|
|
"ASAN_OPTIONS=detect_odr_violation=0\n");
|
|
InternalScopedString error_msg;
|
|
error_msg.append("%s: global '%s' at %s", scariness.GetDescription(),
|
|
MaybeDemangleGlobalName(global1.name), g1_loc.data());
|
|
ReportErrorSummary(error_msg.data());
|
|
}
|
|
|
|
void ErrorInvalidPointerPair::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
Report("ERROR: AddressSanitizer: %s: %p %p\n", scariness.GetDescription(),
|
|
(void *)addr1_description.Address(),
|
|
(void *)addr2_description.Address());
|
|
Printf("%s", d.Default());
|
|
GET_STACK_TRACE_FATAL(pc, bp);
|
|
stack.Print();
|
|
addr1_description.Print();
|
|
addr2_description.Print();
|
|
ReportErrorSummary(scariness.GetDescription(), &stack);
|
|
}
|
|
|
|
static bool AdjacentShadowValuesAreFullyPoisoned(u8 *s) {
|
|
return s[-1] > 127 && s[1] > 127;
|
|
}
|
|
|
|
ErrorGeneric::ErrorGeneric(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr addr,
|
|
bool is_write_, uptr access_size_)
|
|
: ErrorBase(tid),
|
|
addr_description(addr, access_size_, /*shouldLockThreadRegistry=*/false),
|
|
pc(pc_),
|
|
bp(bp_),
|
|
sp(sp_),
|
|
access_size(access_size_),
|
|
is_write(is_write_),
|
|
shadow_val(0) {
|
|
scariness.Clear();
|
|
if (access_size) {
|
|
if (access_size <= 9) {
|
|
char desr[] = "?-byte";
|
|
desr[0] = '0' + access_size;
|
|
scariness.Scare(access_size + access_size / 2, desr);
|
|
} else if (access_size >= 10) {
|
|
scariness.Scare(15, "multi-byte");
|
|
}
|
|
is_write ? scariness.Scare(20, "write") : scariness.Scare(1, "read");
|
|
|
|
// Determine the error type.
|
|
bug_descr = "unknown-crash";
|
|
if (AddrIsInMem(addr)) {
|
|
u8 *shadow_addr = (u8 *)MemToShadow(addr);
|
|
// If we are accessing 16 bytes, look at the second shadow byte.
|
|
if (*shadow_addr == 0 && access_size > ASAN_SHADOW_GRANULARITY)
|
|
shadow_addr++;
|
|
// If we are in the partial right redzone, look at the next shadow byte.
|
|
if (*shadow_addr > 0 && *shadow_addr < 128) shadow_addr++;
|
|
bool far_from_bounds = false;
|
|
shadow_val = *shadow_addr;
|
|
int bug_type_score = 0;
|
|
// For use-after-frees reads are almost as bad as writes.
|
|
int read_after_free_bonus = 0;
|
|
switch (shadow_val) {
|
|
case kAsanHeapLeftRedzoneMagic:
|
|
case kAsanArrayCookieMagic:
|
|
bug_descr = "heap-buffer-overflow";
|
|
bug_type_score = 10;
|
|
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
|
|
break;
|
|
case kAsanHeapFreeMagic:
|
|
bug_descr = "heap-use-after-free";
|
|
bug_type_score = 20;
|
|
if (!is_write) read_after_free_bonus = 18;
|
|
break;
|
|
case kAsanStackLeftRedzoneMagic:
|
|
bug_descr = "stack-buffer-underflow";
|
|
bug_type_score = 25;
|
|
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
|
|
break;
|
|
case kAsanInitializationOrderMagic:
|
|
bug_descr = "initialization-order-fiasco";
|
|
bug_type_score = 1;
|
|
break;
|
|
case kAsanStackMidRedzoneMagic:
|
|
case kAsanStackRightRedzoneMagic:
|
|
bug_descr = "stack-buffer-overflow";
|
|
bug_type_score = 25;
|
|
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
|
|
break;
|
|
case kAsanStackAfterReturnMagic:
|
|
bug_descr = "stack-use-after-return";
|
|
bug_type_score = 30;
|
|
if (!is_write) read_after_free_bonus = 18;
|
|
break;
|
|
case kAsanUserPoisonedMemoryMagic:
|
|
bug_descr = "use-after-poison";
|
|
bug_type_score = 20;
|
|
break;
|
|
case kAsanContiguousContainerOOBMagic:
|
|
bug_descr = "container-overflow";
|
|
bug_type_score = 10;
|
|
break;
|
|
case kAsanStackUseAfterScopeMagic:
|
|
bug_descr = "stack-use-after-scope";
|
|
bug_type_score = 10;
|
|
break;
|
|
case kAsanGlobalRedzoneMagic:
|
|
bug_descr = "global-buffer-overflow";
|
|
bug_type_score = 10;
|
|
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
|
|
break;
|
|
case kAsanIntraObjectRedzone:
|
|
bug_descr = "intra-object-overflow";
|
|
bug_type_score = 10;
|
|
break;
|
|
case kAsanAllocaLeftMagic:
|
|
case kAsanAllocaRightMagic:
|
|
bug_descr = "dynamic-stack-buffer-overflow";
|
|
bug_type_score = 25;
|
|
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
|
|
break;
|
|
}
|
|
scariness.Scare(bug_type_score + read_after_free_bonus, bug_descr);
|
|
if (far_from_bounds) scariness.Scare(10, "far-from-bounds");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void PrintContainerOverflowHint() {
|
|
Printf("HINT: if you don't care about these errors you may set "
|
|
"ASAN_OPTIONS=detect_container_overflow=0.\n"
|
|
"If you suspect a false positive see also: "
|
|
"https://github.com/google/sanitizers/wiki/"
|
|
"AddressSanitizerContainerOverflow.\n");
|
|
}
|
|
|
|
static void PrintShadowByte(InternalScopedString *str, const char *before,
|
|
u8 byte, const char *after = "\n") {
|
|
PrintMemoryByte(str, before, byte, /*in_shadow*/true, after);
|
|
}
|
|
|
|
static void PrintLegend(InternalScopedString *str) {
|
|
str->append(
|
|
"Shadow byte legend (one shadow byte represents %d "
|
|
"application bytes):\n",
|
|
(int)ASAN_SHADOW_GRANULARITY);
|
|
PrintShadowByte(str, " Addressable: ", 0);
|
|
str->append(" Partially addressable: ");
|
|
for (u8 i = 1; i < ASAN_SHADOW_GRANULARITY; i++)
|
|
PrintShadowByte(str, "", i, " ");
|
|
str->append("\n");
|
|
PrintShadowByte(str, " Heap left redzone: ",
|
|
kAsanHeapLeftRedzoneMagic);
|
|
PrintShadowByte(str, " Freed heap region: ", kAsanHeapFreeMagic);
|
|
PrintShadowByte(str, " Stack left redzone: ",
|
|
kAsanStackLeftRedzoneMagic);
|
|
PrintShadowByte(str, " Stack mid redzone: ",
|
|
kAsanStackMidRedzoneMagic);
|
|
PrintShadowByte(str, " Stack right redzone: ",
|
|
kAsanStackRightRedzoneMagic);
|
|
PrintShadowByte(str, " Stack after return: ",
|
|
kAsanStackAfterReturnMagic);
|
|
PrintShadowByte(str, " Stack use after scope: ",
|
|
kAsanStackUseAfterScopeMagic);
|
|
PrintShadowByte(str, " Global redzone: ", kAsanGlobalRedzoneMagic);
|
|
PrintShadowByte(str, " Global init order: ",
|
|
kAsanInitializationOrderMagic);
|
|
PrintShadowByte(str, " Poisoned by user: ",
|
|
kAsanUserPoisonedMemoryMagic);
|
|
PrintShadowByte(str, " Container overflow: ",
|
|
kAsanContiguousContainerOOBMagic);
|
|
PrintShadowByte(str, " Array cookie: ",
|
|
kAsanArrayCookieMagic);
|
|
PrintShadowByte(str, " Intra object redzone: ",
|
|
kAsanIntraObjectRedzone);
|
|
PrintShadowByte(str, " ASan internal: ", kAsanInternalHeapMagic);
|
|
PrintShadowByte(str, " Left alloca redzone: ", kAsanAllocaLeftMagic);
|
|
PrintShadowByte(str, " Right alloca redzone: ", kAsanAllocaRightMagic);
|
|
}
|
|
|
|
static void PrintShadowBytes(InternalScopedString *str, const char *before,
|
|
u8 *bytes, u8 *guilty, uptr n) {
|
|
Decorator d;
|
|
if (before)
|
|
str->append("%s%p:", before, (void *)bytes);
|
|
for (uptr i = 0; i < n; i++) {
|
|
u8 *p = bytes + i;
|
|
const char *before =
|
|
p == guilty ? "[" : (p - 1 == guilty && i != 0) ? "" : " ";
|
|
const char *after = p == guilty ? "]" : "";
|
|
PrintShadowByte(str, before, *p, after);
|
|
}
|
|
str->append("\n");
|
|
}
|
|
|
|
static void PrintShadowMemoryForAddress(uptr addr) {
|
|
if (!AddrIsInMem(addr)) return;
|
|
uptr shadow_addr = MemToShadow(addr);
|
|
const uptr n_bytes_per_row = 16;
|
|
uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
|
|
InternalScopedString str;
|
|
str.append("Shadow bytes around the buggy address:\n");
|
|
for (int i = -5; i <= 5; i++) {
|
|
uptr row_shadow_addr = aligned_shadow + i * n_bytes_per_row;
|
|
// Skip rows that would be outside the shadow range. This can happen when
|
|
// the user address is near the bottom, top, or shadow gap of the address
|
|
// space.
|
|
if (!AddrIsInShadow(row_shadow_addr)) continue;
|
|
const char *prefix = (i == 0) ? "=>" : " ";
|
|
PrintShadowBytes(&str, prefix, (u8 *)row_shadow_addr, (u8 *)shadow_addr,
|
|
n_bytes_per_row);
|
|
}
|
|
if (flags()->print_legend) PrintLegend(&str);
|
|
Printf("%s", str.data());
|
|
}
|
|
|
|
void ErrorGeneric::Print() {
|
|
Decorator d;
|
|
Printf("%s", d.Error());
|
|
uptr addr = addr_description.Address();
|
|
Report("ERROR: AddressSanitizer: %s on address %p at pc %p bp %p sp %p\n",
|
|
bug_descr, (void *)addr, (void *)pc, (void *)bp, (void *)sp);
|
|
Printf("%s", d.Default());
|
|
|
|
Printf("%s%s of size %zu at %p thread %s%s\n", d.Access(),
|
|
access_size ? (is_write ? "WRITE" : "READ") : "ACCESS", access_size,
|
|
(void *)addr, AsanThreadIdAndName(tid).c_str(), d.Default());
|
|
|
|
scariness.Print();
|
|
GET_STACK_TRACE_FATAL(pc, bp);
|
|
stack.Print();
|
|
|
|
// Pass bug_descr because we have a special case for
|
|
// initialization-order-fiasco
|
|
addr_description.Print(bug_descr);
|
|
if (shadow_val == kAsanContiguousContainerOOBMagic)
|
|
PrintContainerOverflowHint();
|
|
ReportErrorSummary(bug_descr, &stack);
|
|
PrintShadowMemoryForAddress(addr);
|
|
}
|
|
|
|
} // namespace __asan
|