forked from OSchip/llvm-project
169 lines
5.2 KiB
C++
169 lines
5.2 KiB
C++
//===-- sanitizer_symbolizer_mac.cc ---------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between various sanitizers' runtime libraries.
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//
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// Implementation of Mac-specific "atos" symbolizer.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_MAC
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#include "sanitizer_allocator_internal.h"
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#include "sanitizer_mac.h"
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#include "sanitizer_symbolizer_mac.h"
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#include <dlfcn.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <util.h>
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namespace __sanitizer {
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bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
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Dl_info info;
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int result = dladdr((const void *)addr, &info);
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if (!result) return false;
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const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
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if (!demangled) return false;
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stack->info.function = internal_strdup(demangled);
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return true;
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}
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bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) {
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Dl_info info;
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int result = dladdr((const void *)addr, &info);
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if (!result) return false;
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const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
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datainfo->name = internal_strdup(demangled);
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datainfo->start = (uptr)info.dli_saddr;
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return true;
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}
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class AtosSymbolizerProcess : public SymbolizerProcess {
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public:
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explicit AtosSymbolizerProcess(const char *path, pid_t parent_pid)
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: SymbolizerProcess(path, /*use_forkpty*/ true) {
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// Put the string command line argument in the object so that it outlives
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// the call to GetArgV.
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internal_snprintf(pid_str_, sizeof(pid_str_), "%d", parent_pid);
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}
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private:
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bool ReachedEndOfOutput(const char *buffer, uptr length) const override {
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return (length >= 1 && buffer[length - 1] == '\n');
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}
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void GetArgV(const char *path_to_binary,
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const char *(&argv)[kArgVMax]) const override {
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int i = 0;
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argv[i++] = path_to_binary;
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argv[i++] = "-p";
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argv[i++] = &pid_str_[0];
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if (GetMacosVersion() == MACOS_VERSION_MAVERICKS) {
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// On Mavericks atos prints a deprecation warning which we suppress by
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// passing -d. The warning isn't present on other OSX versions, even the
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// newer ones.
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argv[i++] = "-d";
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}
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argv[i++] = nullptr;
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}
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char pid_str_[16];
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};
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static bool ParseCommandOutput(const char *str, uptr addr, char **out_name,
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char **out_module, char **out_file, uptr *line,
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uptr *start_address) {
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// Trim ending newlines.
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char *trim;
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ExtractTokenUpToDelimiter(str, "\n", &trim);
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// The line from `atos` is in one of these formats:
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// myfunction (in library.dylib) (sourcefile.c:17)
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// myfunction (in library.dylib) + 0x1fe
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// myfunction (in library.dylib) + 15
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// 0xdeadbeef (in library.dylib) + 0x1fe
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// 0xdeadbeef (in library.dylib) + 15
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// 0xdeadbeef (in library.dylib)
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// 0xdeadbeef
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const char *rest = trim;
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char *symbol_name;
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rest = ExtractTokenUpToDelimiter(rest, " (in ", &symbol_name);
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if (rest[0] == '\0') {
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InternalFree(symbol_name);
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InternalFree(trim);
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return false;
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}
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if (internal_strncmp(symbol_name, "0x", 2) != 0)
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*out_name = symbol_name;
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else
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InternalFree(symbol_name);
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rest = ExtractTokenUpToDelimiter(rest, ") ", out_module);
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if (rest[0] == '(') {
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if (out_file) {
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rest++;
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rest = ExtractTokenUpToDelimiter(rest, ":", out_file);
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char *extracted_line_number;
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rest = ExtractTokenUpToDelimiter(rest, ")", &extracted_line_number);
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if (line) *line = (uptr)internal_atoll(extracted_line_number);
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InternalFree(extracted_line_number);
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}
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} else if (rest[0] == '+') {
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rest += 2;
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uptr offset = internal_atoll(rest);
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if (start_address) *start_address = addr - offset;
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}
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InternalFree(trim);
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return true;
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}
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AtosSymbolizer::AtosSymbolizer(const char *path, LowLevelAllocator *allocator)
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: process_(new(*allocator) AtosSymbolizerProcess(path, getpid())) {}
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bool AtosSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
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if (!process_) return false;
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if (addr == 0) return false;
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char command[32];
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internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
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const char *buf = process_->SendCommand(command);
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if (!buf) return false;
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uptr line;
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if (!ParseCommandOutput(buf, addr, &stack->info.function, &stack->info.module,
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&stack->info.file, &line, nullptr)) {
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process_ = nullptr;
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return false;
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}
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stack->info.line = (int)line;
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return true;
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}
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bool AtosSymbolizer::SymbolizeData(uptr addr, DataInfo *info) {
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if (!process_) return false;
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char command[32];
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internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
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const char *buf = process_->SendCommand(command);
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if (!buf) return false;
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if (!ParseCommandOutput(buf, addr, &info->name, &info->module, nullptr,
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nullptr, &info->start)) {
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process_ = nullptr;
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return false;
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}
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return true;
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}
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} // namespace __sanitizer
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#endif // SANITIZER_MAC
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