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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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103 lines
3.3 KiB
103 lines
3.3 KiB
4 years ago
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/*
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*
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* Copyright 2020 the gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include <grpc/support/port_platform.h>
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#include "test/core/util/examine_stack.h"
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#include <cstdio>
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#include <string>
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#include "absl/debugging/stacktrace.h"
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#include "absl/debugging/symbolize.h"
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namespace {
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static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
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static void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*),
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void* writerfn_arg, void* pc,
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void* symbolize_pc, int framesize,
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const char* const prefix) {
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char tmp[1024];
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const char* symbol = "(unknown)";
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if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
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symbol = tmp;
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}
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char buf[1024];
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if (framesize <= 0) {
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snprintf(buf, sizeof(buf), "%s@ %*p (unknown) %s\n", prefix,
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kPrintfPointerFieldWidth, pc, symbol);
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} else {
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snprintf(buf, sizeof(buf), "%s@ %*p %9d %s\n", prefix,
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kPrintfPointerFieldWidth, pc, framesize, symbol);
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}
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writerfn(buf, writerfn_arg);
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}
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static void DumpPCAndFrameSize(void (*writerfn)(const char*, void*),
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void* writerfn_arg, void* pc, int framesize,
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const char* const prefix) {
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char buf[100];
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if (framesize <= 0) {
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snprintf(buf, sizeof(buf), "%s@ %*p (unknown)\n", prefix,
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kPrintfPointerFieldWidth, pc);
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} else {
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snprintf(buf, sizeof(buf), "%s@ %*p %9d\n", prefix,
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kPrintfPointerFieldWidth, pc, framesize);
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}
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writerfn(buf, writerfn_arg);
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}
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static void DumpStackTrace(void* const stack[], int frame_sizes[], int depth,
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bool symbolize_stacktrace,
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void (*writerfn)(const char*, void*),
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void* writerfn_arg) {
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for (int i = 0; i < depth; i++) {
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if (symbolize_stacktrace) {
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DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i],
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reinterpret_cast<char*>(stack[i]) - 1,
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frame_sizes[i], " ");
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} else {
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DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i],
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" ");
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}
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}
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}
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static void DebugWriteToString(const char* data, void* str) {
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reinterpret_cast<std::string*>(str)->append(data);
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}
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} // namespace
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namespace grpc_core {
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std::string CurrentStackTrace() {
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std::string result = "Stack trace:\n";
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constexpr int kNumStackFrames = 32;
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void* stack[kNumStackFrames];
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int frame_sizes[kNumStackFrames];
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int depth = absl::GetStackFrames(stack, frame_sizes, kNumStackFrames, 1);
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DumpStackTrace(stack, frame_sizes, depth, true, DebugWriteToString,
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(void*)&result);
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return result;
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}
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} // namespace grpc_core
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