Link stack frames of JNI stubs to JNI callbacks.

base/android/jni_android.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/android/jni_android.h"
 
 #include <stddef.h>
 
 #include <map>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_string.h"
 #include "base/android/jni_utils.h"
+#include "base/debug/debugging_flags.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/threading/thread_local.h"
 
 namespace {
 using base::android::GetClass;
 using base::android::MethodID;
 using base::android::ScopedJavaLocalRef;
 
 bool g_disable_manual_jni_registration = false;
 
 JavaVM* g_jvm = NULL;
 base::LazyInstance<base::android::ScopedJavaGlobalRef<jobject> >::Leaky
     g_class_loader = LAZY_INSTANCE_INITIALIZER;
 jmethodID g_class_loader_load_class_method_id = 0;
 
+#if BUILDFLAG(ENABLE_PROFILING) && HAVE_TRACE_STACK_FRAME_POINTERS
+base::LazyInstance<base::ThreadLocalPointer<void>>::Leaky
+    g_stack_frame_pointer = LAZY_INSTANCE_INITIALIZER;
+#endif
+
 }  // namespace
 
 namespace base {
 namespace android {
 
 bool IsManualJniRegistrationDisabled() {
   return g_disable_manual_jni_registration;
 }
 
 void DisableManualJniRegistration() {
@@ skipping 236 matching lines @@
 
   // Call ByteArrayOutputStream.toString()
   ScopedJavaLocalRef<jstring> exception_string(
       env, static_cast<jstring>(
           env->CallObjectMethod(bytearray_output_stream.obj(),
                                 bytearray_output_stream_tostring)));
 
   return ConvertJavaStringToUTF8(exception_string);
 }
 
+#if BUILDFLAG(ENABLE_PROFILING) && HAVE_TRACE_STACK_FRAME_POINTERS
+
+JNIStackFrameSaver::JNIStackFrameSaver(void* current_fp) {
+  previous_fp_ = g_stack_frame_pointer.Pointer()->Get();
+  g_stack_frame_pointer.Pointer()->Set(current_fp);
+}
+
+JNIStackFrameSaver::~JNIStackFrameSaver() {
+  g_stack_frame_pointer.Pointer()->Set(previous_fp_);
+}
+
+void* JNIStackFrameSaver::SavedFrame() {
+  return g_stack_frame_pointer.Pointer()->Get();
+}
+
+#endif  // ENABLE_PROFILING && HAVE_TRACE_STACK_FRAME_POINTERS
 
 }  // namespace android
 }  // namespace base