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-rw-r--r--gcc-4.9/libsanitizer/asan/asan_report.cc803
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diff --git a/gcc-4.9/libsanitizer/asan/asan_report.cc b/gcc-4.9/libsanitizer/asan/asan_report.cc
new file mode 100644
index 000000000..70c4b481a
--- /dev/null
+++ b/gcc-4.9/libsanitizer/asan/asan_report.cc
@@ -0,0 +1,803 @@
+//===-- asan_report.cc ----------------------------------------------------===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// This file contains error reporting code.
+//===----------------------------------------------------------------------===//
+#include "asan_flags.h"
+#include "asan_internal.h"
+#include "asan_mapping.h"
+#include "asan_report.h"
+#include "asan_stack.h"
+#include "asan_thread.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_flags.h"
+#include "sanitizer_common/sanitizer_report_decorator.h"
+#include "sanitizer_common/sanitizer_stackdepot.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
+
+namespace __asan {
+
+// -------------------- User-specified callbacks ----------------- {{{1
+static void (*error_report_callback)(const char*);
+static char *error_message_buffer = 0;
+static uptr error_message_buffer_pos = 0;
+static uptr error_message_buffer_size = 0;
+
+void AppendToErrorMessageBuffer(const char *buffer) {
+ if (error_message_buffer) {
+ uptr length = internal_strlen(buffer);
+ CHECK_GE(error_message_buffer_size, error_message_buffer_pos);
+ uptr remaining = error_message_buffer_size - error_message_buffer_pos;
+ internal_strncpy(error_message_buffer + error_message_buffer_pos,
+ buffer, remaining);
+ error_message_buffer[error_message_buffer_size - 1] = '\0';
+ // FIXME: reallocate the buffer instead of truncating the message.
+ error_message_buffer_pos += remaining > length ? length : remaining;
+ }
+}
+
+// ---------------------- Decorator ------------------------------ {{{1
+class Decorator: private __sanitizer::AnsiColorDecorator {
+ public:
+ Decorator() : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { }
+ const char *Warning() { return Red(); }
+ const char *EndWarning() { return Default(); }
+ const char *Access() { return Blue(); }
+ const char *EndAccess() { return Default(); }
+ const char *Location() { return Green(); }
+ const char *EndLocation() { return Default(); }
+ const char *Allocation() { return Magenta(); }
+ const char *EndAllocation() { return Default(); }
+
+ const char *ShadowByte(u8 byte) {
+ switch (byte) {
+ case kAsanHeapLeftRedzoneMagic:
+ case kAsanHeapRightRedzoneMagic:
+ return Red();
+ case kAsanHeapFreeMagic:
+ return Magenta();
+ case kAsanStackLeftRedzoneMagic:
+ case kAsanStackMidRedzoneMagic:
+ case kAsanStackRightRedzoneMagic:
+ case kAsanStackPartialRedzoneMagic:
+ return Red();
+ case kAsanStackAfterReturnMagic:
+ return Magenta();
+ case kAsanInitializationOrderMagic:
+ return Cyan();
+ case kAsanUserPoisonedMemoryMagic:
+ case kAsanContiguousContainerOOBMagic:
+ return Blue();
+ case kAsanStackUseAfterScopeMagic:
+ return Magenta();
+ case kAsanGlobalRedzoneMagic:
+ return Red();
+ case kAsanInternalHeapMagic:
+ return Yellow();
+ default:
+ return Default();
+ }
+ }
+ const char *EndShadowByte() { return Default(); }
+};
+
+// ---------------------- Helper functions ----------------------- {{{1
+
+static void PrintShadowByte(const char *before, u8 byte,
+ const char *after = "\n") {
+ Decorator d;
+ Printf("%s%s%x%x%s%s", before,
+ d.ShadowByte(byte), byte >> 4, byte & 15, d.EndShadowByte(), after);
+}
+
+static void PrintShadowBytes(const char *before, u8 *bytes,
+ u8 *guilty, uptr n) {
+ Decorator d;
+ if (before)
+ Printf("%s%p:", before, 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(before, *p, after);
+ }
+ Printf("\n");
+}
+
+static void PrintLegend() {
+ Printf("Shadow byte legend (one shadow byte represents %d "
+ "application bytes):\n", (int)SHADOW_GRANULARITY);
+ PrintShadowByte(" Addressable: ", 0);
+ Printf(" Partially addressable: ");
+ for (u8 i = 1; i < SHADOW_GRANULARITY; i++)
+ PrintShadowByte("", i, " ");
+ Printf("\n");
+ PrintShadowByte(" Heap left redzone: ", kAsanHeapLeftRedzoneMagic);
+ PrintShadowByte(" Heap right redzone: ", kAsanHeapRightRedzoneMagic);
+ PrintShadowByte(" Freed heap region: ", kAsanHeapFreeMagic);
+ PrintShadowByte(" Stack left redzone: ", kAsanStackLeftRedzoneMagic);
+ PrintShadowByte(" Stack mid redzone: ", kAsanStackMidRedzoneMagic);
+ PrintShadowByte(" Stack right redzone: ", kAsanStackRightRedzoneMagic);
+ PrintShadowByte(" Stack partial redzone: ", kAsanStackPartialRedzoneMagic);
+ PrintShadowByte(" Stack after return: ", kAsanStackAfterReturnMagic);
+ PrintShadowByte(" Stack use after scope: ", kAsanStackUseAfterScopeMagic);
+ PrintShadowByte(" Global redzone: ", kAsanGlobalRedzoneMagic);
+ PrintShadowByte(" Global init order: ", kAsanInitializationOrderMagic);
+ PrintShadowByte(" Poisoned by user: ", kAsanUserPoisonedMemoryMagic);
+ PrintShadowByte(" Contiguous container OOB:",
+ kAsanContiguousContainerOOBMagic);
+ PrintShadowByte(" ASan internal: ", kAsanInternalHeapMagic);
+}
+
+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);
+ Printf("Shadow bytes around the buggy address:\n");
+ for (int i = -5; i <= 5; i++) {
+ const char *prefix = (i == 0) ? "=>" : " ";
+ PrintShadowBytes(prefix,
+ (u8*)(aligned_shadow + i * n_bytes_per_row),
+ (u8*)shadow_addr, n_bytes_per_row);
+ }
+ if (flags()->print_legend)
+ PrintLegend();
+}
+
+static void PrintZoneForPointer(uptr ptr, uptr zone_ptr,
+ const char *zone_name) {
+ if (zone_ptr) {
+ if (zone_name) {
+ Printf("malloc_zone_from_ptr(%p) = %p, which is %s\n",
+ ptr, zone_ptr, zone_name);
+ } else {
+ Printf("malloc_zone_from_ptr(%p) = %p, which doesn't have a name\n",
+ ptr, zone_ptr);
+ }
+ } else {
+ Printf("malloc_zone_from_ptr(%p) = 0\n", ptr);
+ }
+}
+
+static void DescribeThread(AsanThread *t) {
+ if (t)
+ DescribeThread(t->context());
+}
+
+// ---------------------- Address Descriptions ------------------- {{{1
+
+static bool IsASCII(unsigned char c) {
+ return /*0x00 <= c &&*/ c <= 0x7F;
+}
+
+static const char *MaybeDemangleGlobalName(const char *name) {
+ // We can spoil names of globals with C linkage, so use an heuristic
+ // approach to check if the name should be demangled.
+ return (name[0] == '_' && name[1] == 'Z')
+ ? Symbolizer::Get()->Demangle(name)
+ : name;
+}
+
+// Check if the global is a zero-terminated ASCII string. If so, print it.
+static void PrintGlobalNameIfASCII(const __asan_global &g) {
+ for (uptr p = g.beg; p < g.beg + g.size - 1; p++) {
+ unsigned char c = *(unsigned char*)p;
+ if (c == '\0' || !IsASCII(c)) return;
+ }
+ if (*(char*)(g.beg + g.size - 1) != '\0') return;
+ Printf(" '%s' is ascii string '%s'\n",
+ MaybeDemangleGlobalName(g.name), (char*)g.beg);
+}
+
+bool DescribeAddressRelativeToGlobal(uptr addr, uptr size,
+ const __asan_global &g) {
+ static const uptr kMinimalDistanceFromAnotherGlobal = 64;
+ if (addr <= g.beg - kMinimalDistanceFromAnotherGlobal) return false;
+ if (addr >= g.beg + g.size_with_redzone) return false;
+ Decorator d;
+ Printf("%s", d.Location());
+ if (addr < g.beg) {
+ Printf("%p is located %zd bytes to the left", (void*)addr, g.beg - addr);
+ } else if (addr + size > g.beg + g.size) {
+ if (addr < g.beg + g.size)
+ addr = g.beg + g.size;
+ Printf("%p is located %zd bytes to the right", (void*)addr,
+ addr - (g.beg + g.size));
+ } else {
+ // Can it happen?
+ Printf("%p is located %zd bytes inside", (void*)addr, addr - g.beg);
+ }
+ Printf(" of global variable '%s' from '%s' (0x%zx) of size %zu\n",
+ MaybeDemangleGlobalName(g.name), g.module_name, g.beg, g.size);
+ Printf("%s", d.EndLocation());
+ PrintGlobalNameIfASCII(g);
+ return true;
+}
+
+bool DescribeAddressIfShadow(uptr addr) {
+ if (AddrIsInMem(addr))
+ return false;
+ static const char kAddrInShadowReport[] =
+ "Address %p is located in the %s.\n";
+ if (AddrIsInShadowGap(addr)) {
+ Printf(kAddrInShadowReport, addr, "shadow gap area");
+ return true;
+ }
+ if (AddrIsInHighShadow(addr)) {
+ Printf(kAddrInShadowReport, addr, "high shadow area");
+ return true;
+ }
+ if (AddrIsInLowShadow(addr)) {
+ Printf(kAddrInShadowReport, addr, "low shadow area");
+ return true;
+ }
+ CHECK(0 && "Address is not in memory and not in shadow?");
+ return false;
+}
+
+// Return " (thread_name) " or an empty string if the name is empty.
+const char *ThreadNameWithParenthesis(AsanThreadContext *t, char buff[],
+ uptr buff_len) {
+ const char *name = t->name;
+ if (name[0] == '\0') return "";
+ buff[0] = 0;
+ internal_strncat(buff, " (", 3);
+ internal_strncat(buff, name, buff_len - 4);
+ internal_strncat(buff, ")", 2);
+ return buff;
+}
+
+const char *ThreadNameWithParenthesis(u32 tid, char buff[],
+ uptr buff_len) {
+ if (tid == kInvalidTid) return "";
+ asanThreadRegistry().CheckLocked();
+ AsanThreadContext *t = GetThreadContextByTidLocked(tid);
+ return ThreadNameWithParenthesis(t, buff, buff_len);
+}
+
+void PrintAccessAndVarIntersection(const char *var_name,
+ uptr var_beg, uptr var_size,
+ uptr addr, uptr access_size,
+ uptr prev_var_end, uptr next_var_beg) {
+ uptr var_end = var_beg + var_size;
+ uptr addr_end = addr + access_size;
+ const char *pos_descr = 0;
+ // If the variable [var_beg, var_end) is the nearest variable to the
+ // current memory access, indicate it in the log.
+ if (addr >= var_beg) {
+ if (addr_end <= var_end)
+ pos_descr = "is inside"; // May happen if this is a use-after-return.
+ else if (addr < var_end)
+ pos_descr = "partially overflows";
+ else if (addr_end <= next_var_beg &&
+ next_var_beg - addr_end >= addr - var_end)
+ pos_descr = "overflows";
+ } else {
+ if (addr_end > var_beg)
+ pos_descr = "partially underflows";
+ else if (addr >= prev_var_end &&
+ addr - prev_var_end >= var_beg - addr_end)
+ pos_descr = "underflows";
+ }
+ Printf(" [%zd, %zd) '%s'", var_beg, var_beg + var_size, var_name);
+ if (pos_descr) {
+ Decorator d;
+ // FIXME: we may want to also print the size of the access here,
+ // but in case of accesses generated by memset it may be confusing.
+ Printf("%s <== Memory access at offset %zd %s this variable%s\n",
+ d.Location(), addr, pos_descr, d.EndLocation());
+ } else {
+ Printf("\n");
+ }
+}
+
+struct StackVarDescr {
+ uptr beg;
+ uptr size;
+ const char *name_pos;
+ uptr name_len;
+};
+
+bool DescribeAddressIfStack(uptr addr, uptr access_size) {
+ AsanThread *t = FindThreadByStackAddress(addr);
+ if (!t) return false;
+ const uptr kBufSize = 4095;
+ char buf[kBufSize];
+ uptr offset = 0;
+ uptr frame_pc = 0;
+ char tname[128];
+ const char *frame_descr = t->GetFrameNameByAddr(addr, &offset, &frame_pc);
+
+#ifdef __powerpc64__
+ // On PowerPC64, the address of a function actually points to a
+ // three-doubleword data structure with the first field containing
+ // the address of the function's code.
+ frame_pc = *reinterpret_cast<uptr *>(frame_pc);
+#endif
+
+ // This string is created by the compiler and has the following form:
+ // "n alloc_1 alloc_2 ... alloc_n"
+ // where alloc_i looks like "offset size len ObjectName ".
+ CHECK(frame_descr);
+ Decorator d;
+ Printf("%s", d.Location());
+ Printf("Address %p is located in stack of thread T%d%s "
+ "at offset %zu in frame\n",
+ addr, t->tid(),
+ ThreadNameWithParenthesis(t->tid(), tname, sizeof(tname)),
+ offset);
+ // Now we print the frame where the alloca has happened.
+ // We print this frame as a stack trace with one element.
+ // The symbolizer may print more than one frame if inlining was involved.
+ // The frame numbers may be different than those in the stack trace printed
+ // previously. That's unfortunate, but I have no better solution,
+ // especially given that the alloca may be from entirely different place
+ // (e.g. use-after-scope, or different thread's stack).
+ StackTrace alloca_stack;
+ alloca_stack.trace[0] = frame_pc + 16;
+ alloca_stack.size = 1;
+ Printf("%s", d.EndLocation());
+ PrintStack(&alloca_stack);
+ // Report the number of stack objects.
+ char *p;
+ uptr n_objects = (uptr)internal_simple_strtoll(frame_descr, &p, 10);
+ CHECK_GT(n_objects, 0);
+ Printf(" This frame has %zu object(s):\n", n_objects);
+
+ // Report all objects in this frame.
+ InternalScopedBuffer<StackVarDescr> vars(n_objects);
+ for (uptr i = 0; i < n_objects; i++) {
+ uptr beg, size;
+ uptr len;
+ beg = (uptr)internal_simple_strtoll(p, &p, 10);
+ size = (uptr)internal_simple_strtoll(p, &p, 10);
+ len = (uptr)internal_simple_strtoll(p, &p, 10);
+ if (beg == 0 || size == 0 || *p != ' ') {
+ Printf("AddressSanitizer can't parse the stack frame "
+ "descriptor: |%s|\n", frame_descr);
+ break;
+ }
+ p++;
+ vars[i].beg = beg;
+ vars[i].size = size;
+ vars[i].name_pos = p;
+ vars[i].name_len = len;
+ p += len;
+ }
+ for (uptr i = 0; i < n_objects; i++) {
+ buf[0] = 0;
+ internal_strncat(buf, vars[i].name_pos,
+ static_cast<uptr>(Min(kBufSize, vars[i].name_len)));
+ uptr prev_var_end = i ? vars[i - 1].beg + vars[i - 1].size : 0;
+ uptr next_var_beg = i + 1 < n_objects ? vars[i + 1].beg : ~(0UL);
+ PrintAccessAndVarIntersection(buf, vars[i].beg, vars[i].size,
+ offset, access_size,
+ prev_var_end, next_var_beg);
+ }
+ Printf("HINT: this may be a false positive if your program uses "
+ "some custom stack unwind mechanism or swapcontext\n"
+ " (longjmp and C++ exceptions *are* supported)\n");
+ DescribeThread(t);
+ return true;
+}
+
+static void DescribeAccessToHeapChunk(AsanChunkView chunk, uptr addr,
+ uptr access_size) {
+ sptr offset;
+ Decorator d;
+ Printf("%s", d.Location());
+ if (chunk.AddrIsAtLeft(addr, access_size, &offset)) {
+ Printf("%p is located %zd bytes to the left of", (void*)addr, offset);
+ } else if (chunk.AddrIsAtRight(addr, access_size, &offset)) {
+ if (offset < 0) {
+ addr -= offset;
+ offset = 0;
+ }
+ Printf("%p is located %zd bytes to the right of", (void*)addr, offset);
+ } else if (chunk.AddrIsInside(addr, access_size, &offset)) {
+ Printf("%p is located %zd bytes inside of", (void*)addr, offset);
+ } else {
+ Printf("%p is located somewhere around (this is AddressSanitizer bug!)",
+ (void*)addr);
+ }
+ Printf(" %zu-byte region [%p,%p)\n", chunk.UsedSize(),
+ (void*)(chunk.Beg()), (void*)(chunk.End()));
+ Printf("%s", d.EndLocation());
+}
+
+void DescribeHeapAddress(uptr addr, uptr access_size) {
+ AsanChunkView chunk = FindHeapChunkByAddress(addr);
+ if (!chunk.IsValid()) {
+ Printf("AddressSanitizer can not describe address in more detail "
+ "(wild memory access suspected).\n");
+ return;
+ }
+ DescribeAccessToHeapChunk(chunk, addr, access_size);
+ CHECK(chunk.AllocTid() != kInvalidTid);
+ asanThreadRegistry().CheckLocked();
+ AsanThreadContext *alloc_thread =
+ GetThreadContextByTidLocked(chunk.AllocTid());
+ StackTrace alloc_stack;
+ chunk.GetAllocStack(&alloc_stack);
+ char tname[128];
+ Decorator d;
+ AsanThreadContext *free_thread = 0;
+ if (chunk.FreeTid() != kInvalidTid) {
+ free_thread = GetThreadContextByTidLocked(chunk.FreeTid());
+ Printf("%sfreed by thread T%d%s here:%s\n", d.Allocation(),
+ free_thread->tid,
+ ThreadNameWithParenthesis(free_thread, tname, sizeof(tname)),
+ d.EndAllocation());
+ StackTrace free_stack;
+ chunk.GetFreeStack(&free_stack);
+ PrintStack(&free_stack);
+ Printf("%spreviously allocated by thread T%d%s here:%s\n",
+ d.Allocation(), alloc_thread->tid,
+ ThreadNameWithParenthesis(alloc_thread, tname, sizeof(tname)),
+ d.EndAllocation());
+ } else {
+ Printf("%sallocated by thread T%d%s here:%s\n", d.Allocation(),
+ alloc_thread->tid,
+ ThreadNameWithParenthesis(alloc_thread, tname, sizeof(tname)),
+ d.EndAllocation());
+ }
+ PrintStack(&alloc_stack);
+ DescribeThread(GetCurrentThread());
+ if (free_thread)
+ DescribeThread(free_thread);
+ DescribeThread(alloc_thread);
+}
+
+void DescribeAddress(uptr addr, uptr access_size) {
+ // Check if this is shadow or shadow gap.
+ if (DescribeAddressIfShadow(addr))
+ return;
+ CHECK(AddrIsInMem(addr));
+ if (DescribeAddressIfGlobal(addr, access_size))
+ return;
+ if (DescribeAddressIfStack(addr, access_size))
+ return;
+ // Assume it is a heap address.
+ DescribeHeapAddress(addr, access_size);
+}
+
+// ------------------- Thread description -------------------- {{{1
+
+void DescribeThread(AsanThreadContext *context) {
+ CHECK(context);
+ asanThreadRegistry().CheckLocked();
+ // No need to announce the main thread.
+ if (context->tid == 0 || context->announced) {
+ return;
+ }
+ context->announced = true;
+ char tname[128];
+ Printf("Thread T%d%s", context->tid,
+ ThreadNameWithParenthesis(context->tid, tname, sizeof(tname)));
+ Printf(" created by T%d%s here:\n",
+ context->parent_tid,
+ ThreadNameWithParenthesis(context->parent_tid,
+ tname, sizeof(tname)));
+ uptr stack_size;
+ const uptr *stack_trace = StackDepotGet(context->stack_id, &stack_size);
+ PrintStack(stack_trace, stack_size);
+ // Recursively described parent thread if needed.
+ if (flags()->print_full_thread_history) {
+ AsanThreadContext *parent_context =
+ GetThreadContextByTidLocked(context->parent_tid);
+ DescribeThread(parent_context);
+ }
+}
+
+// -------------------- Different kinds of reports ----------------- {{{1
+
+// Use ScopedInErrorReport to run common actions just before and
+// immediately after printing error report.
+class ScopedInErrorReport {
+ public:
+ ScopedInErrorReport() {
+ static atomic_uint32_t num_calls;
+ static u32 reporting_thread_tid;
+ if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
+ // Do not print more than one report, otherwise they will mix up.
+ // Error reporting functions shouldn't return at this situation, as
+ // they are defined as no-return.
+ Report("AddressSanitizer: while reporting a bug found another one."
+ "Ignoring.\n");
+ u32 current_tid = GetCurrentTidOrInvalid();
+ if (current_tid != reporting_thread_tid) {
+ // ASan found two bugs in different threads simultaneously. Sleep
+ // long enough to make sure that the thread which started to print
+ // an error report will finish doing it.
+ SleepForSeconds(Max(100, flags()->sleep_before_dying + 1));
+ }
+ // If we're still not dead for some reason, use raw _exit() instead of
+ // Die() to bypass any additional checks.
+ internal__exit(flags()->exitcode);
+ }
+ ASAN_ON_ERROR();
+ // Make sure the registry and sanitizer report mutexes are locked while
+ // we're printing an error report.
+ // We can lock them only here to avoid self-deadlock in case of
+ // recursive reports.
+ asanThreadRegistry().Lock();
+ CommonSanitizerReportMutex.Lock();
+ reporting_thread_tid = GetCurrentTidOrInvalid();
+ Printf("===================================================="
+ "=============\n");
+ }
+ // Destructor is NORETURN, as functions that report errors are.
+ NORETURN ~ScopedInErrorReport() {
+ // Make sure the current thread is announced.
+ DescribeThread(GetCurrentThread());
+ // Print memory stats.
+ if (flags()->print_stats)
+ __asan_print_accumulated_stats();
+ if (error_report_callback) {
+ error_report_callback(error_message_buffer);
+ }
+ Report("ABORTING\n");
+ Die();
+ }
+};
+
+void ReportSIGSEGV(uptr pc, uptr sp, uptr bp, uptr addr) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: SEGV on unknown address %p"
+ " (pc %p sp %p bp %p T%d)\n",
+ (void*)addr, (void*)pc, (void*)sp, (void*)bp,
+ GetCurrentTidOrInvalid());
+ Printf("%s", d.EndWarning());
+ GET_STACK_TRACE_FATAL(pc, bp);
+ PrintStack(&stack);
+ Printf("AddressSanitizer can not provide additional info.\n");
+ ReportErrorSummary("SEGV", &stack);
+}
+
+void ReportDoubleFree(uptr addr, StackTrace *free_stack) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ char tname[128];
+ u32 curr_tid = GetCurrentTidOrInvalid();
+ Report("ERROR: AddressSanitizer: attempting double-free on %p in "
+ "thread T%d%s:\n",
+ addr, curr_tid,
+ ThreadNameWithParenthesis(curr_tid, tname, sizeof(tname)));
+ Printf("%s", d.EndWarning());
+ CHECK_GT(free_stack->size, 0);
+ GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
+ PrintStack(&stack);
+ DescribeHeapAddress(addr, 1);
+ ReportErrorSummary("double-free", &stack);
+}
+
+void ReportFreeNotMalloced(uptr addr, StackTrace *free_stack) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ char tname[128];
+ u32 curr_tid = GetCurrentTidOrInvalid();
+ Report("ERROR: AddressSanitizer: attempting free on address "
+ "which was not malloc()-ed: %p in thread T%d%s\n", addr,
+ curr_tid, ThreadNameWithParenthesis(curr_tid, tname, sizeof(tname)));
+ Printf("%s", d.EndWarning());
+ CHECK_GT(free_stack->size, 0);
+ GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
+ PrintStack(&stack);
+ DescribeHeapAddress(addr, 1);
+ ReportErrorSummary("bad-free", &stack);
+}
+
+void ReportAllocTypeMismatch(uptr addr, StackTrace *free_stack,
+ AllocType alloc_type,
+ AllocType dealloc_type) {
+ 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);
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: alloc-dealloc-mismatch (%s vs %s) on %p\n",
+ alloc_names[alloc_type], dealloc_names[dealloc_type], addr);
+ Printf("%s", d.EndWarning());
+ CHECK_GT(free_stack->size, 0);
+ GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
+ PrintStack(&stack);
+ DescribeHeapAddress(addr, 1);
+ ReportErrorSummary("alloc-dealloc-mismatch", &stack);
+ Report("HINT: if you don't care about these warnings you may set "
+ "ASAN_OPTIONS=alloc_dealloc_mismatch=0\n");
+}
+
+void ReportMallocUsableSizeNotOwned(uptr addr, StackTrace *stack) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: attempting to call "
+ "malloc_usable_size() for pointer which is "
+ "not owned: %p\n", addr);
+ Printf("%s", d.EndWarning());
+ PrintStack(stack);
+ DescribeHeapAddress(addr, 1);
+ ReportErrorSummary("bad-malloc_usable_size", stack);
+}
+
+void ReportAsanGetAllocatedSizeNotOwned(uptr addr, StackTrace *stack) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: attempting to call "
+ "__asan_get_allocated_size() for pointer which is "
+ "not owned: %p\n", addr);
+ Printf("%s", d.EndWarning());
+ PrintStack(stack);
+ DescribeHeapAddress(addr, 1);
+ ReportErrorSummary("bad-__asan_get_allocated_size", stack);
+}
+
+void ReportStringFunctionMemoryRangesOverlap(
+ const char *function, const char *offset1, uptr length1,
+ const char *offset2, uptr length2, StackTrace *stack) {
+ ScopedInErrorReport in_report;
+ Decorator d;
+ char bug_type[100];
+ internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function);
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: %s: "
+ "memory ranges [%p,%p) and [%p, %p) overlap\n", \
+ bug_type, offset1, offset1 + length1, offset2, offset2 + length2);
+ Printf("%s", d.EndWarning());
+ PrintStack(stack);
+ DescribeAddress((uptr)offset1, length1);
+ DescribeAddress((uptr)offset2, length2);
+ ReportErrorSummary(bug_type, stack);
+}
+
+// ----------------------- Mac-specific reports ----------------- {{{1
+
+void WarnMacFreeUnallocated(
+ uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+ // Just print a warning here.
+ Printf("free_common(%p) -- attempting to free unallocated memory.\n"
+ "AddressSanitizer is ignoring this error on Mac OS now.\n",
+ addr);
+ PrintZoneForPointer(addr, zone_ptr, zone_name);
+ PrintStack(stack);
+ DescribeHeapAddress(addr, 1);
+}
+
+void ReportMacMzReallocUnknown(
+ uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+ ScopedInErrorReport in_report;
+ Printf("mz_realloc(%p) -- attempting to realloc unallocated memory.\n"
+ "This is an unrecoverable problem, exiting now.\n",
+ addr);
+ PrintZoneForPointer(addr, zone_ptr, zone_name);
+ PrintStack(stack);
+ DescribeHeapAddress(addr, 1);
+}
+
+void ReportMacCfReallocUnknown(
+ uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+ ScopedInErrorReport in_report;
+ Printf("cf_realloc(%p) -- attempting to realloc unallocated memory.\n"
+ "This is an unrecoverable problem, exiting now.\n",
+ addr);
+ PrintZoneForPointer(addr, zone_ptr, zone_name);
+ PrintStack(stack);
+ DescribeHeapAddress(addr, 1);
+}
+
+} // namespace __asan
+
+// --------------------------- Interface --------------------- {{{1
+using namespace __asan; // NOLINT
+
+void __asan_report_error(uptr pc, uptr bp, uptr sp,
+ uptr addr, bool is_write, uptr access_size) {
+ ScopedInErrorReport in_report;
+
+ // Determine the error type.
+ const char *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 > 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++;
+ switch (*shadow_addr) {
+ case kAsanHeapLeftRedzoneMagic:
+ case kAsanHeapRightRedzoneMagic:
+ bug_descr = "heap-buffer-overflow";
+ break;
+ case kAsanHeapFreeMagic:
+ bug_descr = "heap-use-after-free";
+ break;
+ case kAsanStackLeftRedzoneMagic:
+ bug_descr = "stack-buffer-underflow";
+ break;
+ case kAsanInitializationOrderMagic:
+ bug_descr = "initialization-order-fiasco";
+ break;
+ case kAsanStackMidRedzoneMagic:
+ case kAsanStackRightRedzoneMagic:
+ case kAsanStackPartialRedzoneMagic:
+ bug_descr = "stack-buffer-overflow";
+ break;
+ case kAsanStackAfterReturnMagic:
+ bug_descr = "stack-use-after-return";
+ break;
+ case kAsanUserPoisonedMemoryMagic:
+ bug_descr = "use-after-poison";
+ break;
+ case kAsanContiguousContainerOOBMagic:
+ bug_descr = "container-overflow";
+ break;
+ case kAsanStackUseAfterScopeMagic:
+ bug_descr = "stack-use-after-scope";
+ break;
+ case kAsanGlobalRedzoneMagic:
+ bug_descr = "global-buffer-overflow";
+ break;
+ }
+ }
+ Decorator d;
+ Printf("%s", d.Warning());
+ Report("ERROR: AddressSanitizer: %s on address "
+ "%p at pc 0x%zx bp 0x%zx sp 0x%zx\n",
+ bug_descr, (void*)addr, pc, bp, sp);
+ Printf("%s", d.EndWarning());
+
+ u32 curr_tid = GetCurrentTidOrInvalid();
+ char tname[128];
+ Printf("%s%s of size %zu at %p thread T%d%s%s\n",
+ d.Access(),
+ access_size ? (is_write ? "WRITE" : "READ") : "ACCESS",
+ access_size, (void*)addr, curr_tid,
+ ThreadNameWithParenthesis(curr_tid, tname, sizeof(tname)),
+ d.EndAccess());
+
+ GET_STACK_TRACE_FATAL(pc, bp);
+ PrintStack(&stack);
+
+ DescribeAddress(addr, access_size);
+ ReportErrorSummary(bug_descr, &stack);
+ PrintShadowMemoryForAddress(addr);
+}
+
+void NOINLINE __asan_set_error_report_callback(void (*callback)(const char*)) {
+ error_report_callback = callback;
+ if (callback) {
+ error_message_buffer_size = 1 << 16;
+ error_message_buffer =
+ (char*)MmapOrDie(error_message_buffer_size, __FUNCTION__);
+ error_message_buffer_pos = 0;
+ }
+}
+
+void __asan_describe_address(uptr addr) {
+ DescribeAddress(addr, 1);
+}
+
+#if !SANITIZER_SUPPORTS_WEAK_HOOKS
+// Provide default implementation of __asan_on_error that does nothing
+// and may be overriden by user.
+SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
+void __asan_on_error() {}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 08:24:22 +0000