Reland "Android: Add helper methods for printing native stack traces"
This is a reland of dc32cc00e80972223767be339f9318b803f4a2ae
Relanding because this CL was not the culprit for the Chrome bot.
(This code shouldn't even be executed in Chrome).
Original change's description:
> Android: Add helper methods for printing native stack traces
>
> This CL adds utility functions to unwind the stack for a given thread on
> Android ARM devices. This works on top of unwind.h and unwinds native
> (C++) stack traces only. Unwinding a thread from another thread is done
> by overriding the signal handler with a custom function and then
> interrupting the specific thread.
>
> Bug: webrtc:10168
> Change-Id: If5adffd3a6bb57bf502168743e09a7eefc292bf3
> Reviewed-on: https://webrtc-review.googlesource.com/c/118141
> Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
> Reviewed-by: Tommi <tommi@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#26328}
TBR=tommi
Bug: webrtc:10168
Change-Id: I4c33c2c147cf10c0172c98a55d32dd35a08517c8
Reviewed-on: https://webrtc-review.googlesource.com/c/118704
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26341}diff --git a/sdk/android/native_api/stacktrace/stacktrace.h b/sdk/android/native_api/stacktrace/stacktrace.h
new file mode 100644
index 0000000..1fbf21b
--- /dev/null
+++ b/sdk/android/native_api/stacktrace/stacktrace.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef SDK_ANDROID_NATIVE_API_STACKTRACE_STACKTRACE_H_
+#define SDK_ANDROID_NATIVE_API_STACKTRACE_STACKTRACE_H_
+
+#include <string>
+#include <vector>
+
+namespace webrtc {
+
+struct StackTraceElement {
+ // Pathname of shared object (.so file) that contains address.
+ const char* shared_object_path;
+ // Execution address relative to the .so base address. This matches the
+ // addresses you get with "nm", "objdump", and "ndk-stack", as long as the
+ // code is compiled with position-independent code. Android requires
+ // position-independent code since Lollipop.
+ uint32_t relative_address;
+ // Name of symbol whose definition overlaps the address. This value is null
+ // when symbol names are stripped.
+ const char* symbol_name;
+};
+
+// Utility to unwind stack for a given thread on Android ARM devices. This works
+// on top of unwind.h and unwinds native (C++) stack traces only.
+std::vector<StackTraceElement> GetStackTrace(int tid);
+
+// Get a string representation of the stack trace in a format ndk-stack accepts.
+std::string StackTraceToString(
+ const std::vector<StackTraceElement>& stack_trace);
+
+} // namespace webrtc
+
+#endif // SDK_ANDROID_NATIVE_API_STACKTRACE_STACKTRACE_H_