Abseil Common Libraries (C++) (grcp 依赖)
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153 lines
5.6 KiB
153 lines
5.6 KiB
// |
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// Copyright 2018 The Abseil 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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#include "absl/debugging/internal/examine_stack.h" |
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#ifndef _WIN32 |
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#include <unistd.h> |
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#endif |
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#include <csignal> |
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#include <cstdio> |
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#include "absl/base/attributes.h" |
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#include "absl/base/internal/raw_logging.h" |
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#include "absl/base/macros.h" |
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#include "absl/debugging/stacktrace.h" |
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#include "absl/debugging/symbolize.h" |
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namespace absl { |
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namespace debugging_internal { |
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// Returns the program counter from signal context, nullptr if |
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// unknown. vuc is a ucontext_t*. We use void* to avoid the use of |
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// ucontext_t on non-POSIX systems. |
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void* GetProgramCounter(void* vuc) { |
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#ifdef __linux__ |
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if (vuc != nullptr) { |
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ucontext_t* context = reinterpret_cast<ucontext_t*>(vuc); |
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#if defined(__aarch64__) |
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return reinterpret_cast<void*>(context->uc_mcontext.pc); |
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#elif defined(__arm__) |
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return reinterpret_cast<void*>(context->uc_mcontext.arm_pc); |
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#elif defined(__i386__) |
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if (14 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs)) |
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return reinterpret_cast<void*>(context->uc_mcontext.gregs[14]); |
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#elif defined(__mips__) |
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return reinterpret_cast<void*>(context->uc_mcontext.pc); |
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#elif defined(__powerpc64__) |
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return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]); |
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#elif defined(__powerpc__) |
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return reinterpret_cast<void*>(context->uc_mcontext.regs->nip); |
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#elif defined(__s390__) && !defined(__s390x__) |
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return reinterpret_cast<void*>(context->uc_mcontext.psw.addr & 0x7fffffff); |
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#elif defined(__s390__) && defined(__s390x__) |
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return reinterpret_cast<void*>(context->uc_mcontext.psw.addr); |
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#elif defined(__x86_64__) |
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if (16 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs)) |
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return reinterpret_cast<void*>(context->uc_mcontext.gregs[16]); |
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#else |
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#error "Undefined Architecture." |
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#endif |
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} |
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#elif defined(__akaros__) |
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auto* ctx = reinterpret_cast<struct user_context*>(vuc); |
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return reinterpret_cast<void*>(get_user_ctx_pc(ctx)); |
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#endif |
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static_cast<void>(vuc); |
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return nullptr; |
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} |
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// The %p field width for printf() functions is two characters per byte, |
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// and two extra for the leading "0x". |
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static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*); |
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// Print a program counter, its stack frame size, and its symbol name. |
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// Note that there is a separate symbolize_pc argument. Return addresses may be |
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// at the end of the function, and this allows the caller to back up from pc if |
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// appropriate. |
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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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// Print a program counter and the corresponding stack frame size. |
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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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void DumpPCAndFrameSizesAndStackTrace( |
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void* pc, void* const stack[], int frame_sizes[], int depth, |
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int min_dropped_frames, bool symbolize_stacktrace, |
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void (*writerfn)(const char*, void*), void* writerfn_arg) { |
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if (pc != nullptr) { |
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// We don't know the stack frame size for PC, use 0. |
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if (symbolize_stacktrace) { |
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DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, pc, pc, 0, "PC: "); |
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} else { |
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DumpPCAndFrameSize(writerfn, writerfn_arg, pc, 0, "PC: "); |
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} |
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} |
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for (int i = 0; i < depth; i++) { |
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if (symbolize_stacktrace) { |
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// Pass the previous address of pc as the symbol address because pc is a |
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// return address, and an overrun may occur when the function ends with a |
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// call to a function annotated noreturn (e.g. CHECK). Note that we don't |
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// do this for pc above, as the adjustment is only correct for return |
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// addresses. |
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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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if (min_dropped_frames > 0) { |
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char buf[100]; |
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snprintf(buf, sizeof(buf), " @ ... and at least %d more frames\n", |
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min_dropped_frames); |
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writerfn(buf, writerfn_arg); |
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} |
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} |
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} // namespace debugging_internal |
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} // namespace absl
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