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/*
*
* Copyright 2020 the gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "test/core/util/stack_tracer.h"
#include <cstdio>
#include <string>
#include "absl/debugging/stacktrace.h"
#include "absl/debugging/symbolize.h"
#include "src/core/lib/gprpp/examine_stack.h"
namespace {
constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*),
void* writerfn_arg, void* pc,
void* symbolize_pc, int framesize,
const char* const prefix) {
char tmp[1024];
const char* symbol = "(unknown)";
if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
symbol = tmp;
}
char buf[1024];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown) %s\n", prefix,
kPrintfPointerFieldWidth, pc, symbol);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d %s\n", prefix,
kPrintfPointerFieldWidth, pc, framesize, symbol);
}
writerfn(buf, writerfn_arg);
}
void DumpPCAndFrameSize(void (*writerfn)(const char*, void*),
void* writerfn_arg, void* pc, int framesize,
const char* const prefix) {
char buf[100];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown)\n", prefix,
kPrintfPointerFieldWidth, pc);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d\n", prefix,
kPrintfPointerFieldWidth, pc, framesize);
}
writerfn(buf, writerfn_arg);
}
void DumpStackTrace(void* const stack[], int frame_sizes[], int depth,
bool symbolize_stacktrace,
void (*writerfn)(const char*, void*), void* writerfn_arg) {
for (int i = 0; i < depth; i++) {
if (symbolize_stacktrace) {
DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i],
reinterpret_cast<char*>(stack[i]) - 1,
frame_sizes[i], " ");
} else {
DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i],
" ");
}
}
}
void DebugWriteToString(const char* data, void* str) {
reinterpret_cast<std::string*>(str)->append(data);
}
} // namespace
namespace grpc_core {
namespace testing {
std::string GetCurrentStackTrace() {
std::string result = "Stack trace:\n";
constexpr int kNumStackFrames = 32;
void* stack[kNumStackFrames];
int frame_sizes[kNumStackFrames];
int depth = absl::GetStackFrames(stack, frame_sizes, kNumStackFrames, 1);
DumpStackTrace(stack, frame_sizes, depth, true, DebugWriteToString, &result);
return result;
}
void InitializeStackTracer(const char* argv0) {
absl::InitializeSymbolizer(argv0);
SetCurrentStackTraceProvider(&GetCurrentStackTrace);
}
} // namespace testing
} // namespace grpc_core
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