Check stack pointer to be inside stack when unwinding.

base/debug/stack_trace.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/stack_trace.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <sstream>
 
 #include "base/macros.h"
 
+// TODO(dskiba): use blink::StackFrameDepth::getStackStart() instead
+#if HAVE_TRACE_STACK_FRAME_POINTERS && \
+    (defined(OS_ANDROID) || defined(OS_LINUX))
+#define HAVE_STACK_START
+#include <pthread.h>
+#if defined(__GLIBC__)
+#include "base/process/process_handle.h"
+#include "base/threading/platform_thread.h"
+extern "C" void* __libc_stack_end;  // NOLINT
+#endif
+#endif
+
 namespace base {
 namespace debug {
 
 StackTrace::StackTrace(const void* const* trace, size_t count) {
   count = std::min(count, arraysize(trace_));
   if (count)
     memcpy(trace_, trace, count * sizeof(trace_[0]));
   count_ = count;
 }
 
@@ skipping 10 matching lines @@
 std::string StackTrace::ToString() const {
   std::stringstream stream;
 #if !defined(__UCLIBC__)
   OutputToStream(&stream);
 #endif
   return stream.str();
 }
 
 #if HAVE_TRACE_STACK_FRAME_POINTERS
 
+#if defined(HAVE_STACK_START)
+
+static uintptr_t GetStackStart() {
+#if defined(__GLIBC__)
+  if (GetCurrentProcId() == PlatformThread::CurrentId()) {
+    // Calling pthread_getattr_np() on the main thread sometimes fails,
+    // and also causes reentrancy deadlock in the renderer.
+    return reinterpret_cast<uintptr_t>(__libc_stack_end);
+  }
+#endif
+
+  uintptr_t stack_base = 0;
+  size_t stack_size = 0;
+  pthread_attr_t attributes;
+  int error = pthread_getattr_np(pthread_self(), &attributes);
+  if (!error) {
+    error = pthread_attr_getstack(
+        &attributes,
+        reinterpret_cast<void**>(&stack_base),
+        &stack_size);
+    pthread_attr_destroy(&attributes);
+  }
+  CHECK(!error);

[mmenke, 2016/05/27 17:39:43]

include base/logging.h

+
+  return stack_base + stack_size;
+}
+
+#endif  // HAVE_STACK_START
+
+PerThreadStackInfo::PerThreadStackInfo(): start_address(0) {}
+
 size_t TraceStackFramePointers(const void** out_trace,
                                size_t max_depth,
-                               size_t skip_initial) {
+                               size_t skip_initial,
+                               PerThreadStackInfo* stack_info) {
   // Usage of __builtin_frame_address() enables frame pointers in this
   // function even if they are not enabled globally. So 'sp' will always
   // be valid.
   uintptr_t sp = reinterpret_cast<uintptr_t>(__builtin_frame_address(0));
 
+#if defined(HAVE_STACK_START)
+  if (stack_info && !stack_info->start_address) {
+    stack_info->start_address = GetStackStart();
+  }
+#endif
+
   size_t depth = 0;
   while (depth < max_depth) {
 #if defined(__arm__) && defined(__GNUC__) && !defined(__clang__)
     // GCC and LLVM generate slightly different frames on ARM, see
     // https://llvm.org/bugs/show_bug.cgi?id=18505 - LLVM generates
     // x86-compatible frame, while GCC needs adjustment.
     sp -= sizeof(uintptr_t);
 #endif
 
+#if defined(HAVE_STACK_START)
+    // Both sp[0] and s[1] must be valid. Note that since the stack
+    // is growing downwards, 'start_address' is the highest valid address.
+    if (stack_info &&
+        sp + 2 * sizeof(uintptr_t) > stack_info->start_address) {
+      break;
+    }
+#endif
+
     if (skip_initial != 0) {
       skip_initial--;
     } else {
       out_trace[depth++] = reinterpret_cast<const void**>(sp)[1];
     }
 
     // Find out next frame pointer
     // (heuristics are from TCMalloc's stacktrace functions)
     {
       uintptr_t next_sp = reinterpret_cast<const uintptr_t*>(sp)[0];
@@ skipping 12 matching lines @@
     }
   }
 
   return depth;
 }
 
 #endif  // HAVE_TRACE_STACK_FRAME_POINTERS
 
 }  // namespace debug
 }  // namespace base