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-rw-r--r--lib/sanitizer_common/sanitizer_symbolizer_mac.cpp173
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diff --git a/lib/sanitizer_common/sanitizer_symbolizer_mac.cpp b/lib/sanitizer_common/sanitizer_symbolizer_mac.cpp
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+//===-- sanitizer_symbolizer_mac.cpp --------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between various sanitizers' runtime libraries.
+//
+// Implementation of Mac-specific "atos" symbolizer.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_platform.h"
+#if SANITIZER_MAC
+
+#include "sanitizer_allocator_internal.h"
+#include "sanitizer_mac.h"
+#include "sanitizer_symbolizer_mac.h"
+
+#include <dlfcn.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <util.h>
+
+namespace __sanitizer {
+
+bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
+ Dl_info info;
+ int result = dladdr((const void *)addr, &info);
+ if (!result) return false;
+ const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
+ if (!demangled) return false;
+ stack->info.function = internal_strdup(demangled);
+ return true;
+}
+
+bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) {
+ Dl_info info;
+ int result = dladdr((const void *)addr, &info);
+ if (!result) return false;
+ const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
+ datainfo->name = internal_strdup(demangled);
+ datainfo->start = (uptr)info.dli_saddr;
+ return true;
+}
+
+class AtosSymbolizerProcess : public SymbolizerProcess {
+ public:
+ explicit AtosSymbolizerProcess(const char *path, pid_t parent_pid)
+ : SymbolizerProcess(path, /*use_posix_spawn*/ true) {
+ // Put the string command line argument in the object so that it outlives
+ // the call to GetArgV.
+ internal_snprintf(pid_str_, sizeof(pid_str_), "%d", parent_pid);
+ }
+
+ private:
+ bool StartSymbolizerSubprocess() override {
+ // Configure sandbox before starting atos process.
+ return SymbolizerProcess::StartSymbolizerSubprocess();
+ }
+
+ bool ReachedEndOfOutput(const char *buffer, uptr length) const override {
+ return (length >= 1 && buffer[length - 1] == '\n');
+ }
+
+ void GetArgV(const char *path_to_binary,
+ const char *(&argv)[kArgVMax]) const override {
+ int i = 0;
+ argv[i++] = path_to_binary;
+ argv[i++] = "-p";
+ argv[i++] = &pid_str_[0];
+ if (GetMacosVersion() == MACOS_VERSION_MAVERICKS) {
+ // On Mavericks atos prints a deprecation warning which we suppress by
+ // passing -d. The warning isn't present on other OSX versions, even the
+ // newer ones.
+ argv[i++] = "-d";
+ }
+ argv[i++] = nullptr;
+ }
+
+ char pid_str_[16];
+};
+
+static bool ParseCommandOutput(const char *str, uptr addr, char **out_name,
+ char **out_module, char **out_file, uptr *line,
+ uptr *start_address) {
+ // Trim ending newlines.
+ char *trim;
+ ExtractTokenUpToDelimiter(str, "\n", &trim);
+
+ // The line from `atos` is in one of these formats:
+ // myfunction (in library.dylib) (sourcefile.c:17)
+ // myfunction (in library.dylib) + 0x1fe
+ // myfunction (in library.dylib) + 15
+ // 0xdeadbeef (in library.dylib) + 0x1fe
+ // 0xdeadbeef (in library.dylib) + 15
+ // 0xdeadbeef (in library.dylib)
+ // 0xdeadbeef
+
+ const char *rest = trim;
+ char *symbol_name;
+ rest = ExtractTokenUpToDelimiter(rest, " (in ", &symbol_name);
+ if (rest[0] == '\0') {
+ InternalFree(symbol_name);
+ InternalFree(trim);
+ return false;
+ }
+
+ if (internal_strncmp(symbol_name, "0x", 2) != 0)
+ *out_name = symbol_name;
+ else
+ InternalFree(symbol_name);
+ rest = ExtractTokenUpToDelimiter(rest, ") ", out_module);
+
+ if (rest[0] == '(') {
+ if (out_file) {
+ rest++;
+ rest = ExtractTokenUpToDelimiter(rest, ":", out_file);
+ char *extracted_line_number;
+ rest = ExtractTokenUpToDelimiter(rest, ")", &extracted_line_number);
+ if (line) *line = (uptr)internal_atoll(extracted_line_number);
+ InternalFree(extracted_line_number);
+ }
+ } else if (rest[0] == '+') {
+ rest += 2;
+ uptr offset = internal_atoll(rest);
+ if (start_address) *start_address = addr - offset;
+ }
+
+ InternalFree(trim);
+ return true;
+}
+
+AtosSymbolizer::AtosSymbolizer(const char *path, LowLevelAllocator *allocator)
+ : process_(new(*allocator) AtosSymbolizerProcess(path, getpid())) {}
+
+bool AtosSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
+ if (!process_) return false;
+ if (addr == 0) return false;
+ char command[32];
+ internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
+ const char *buf = process_->SendCommand(command);
+ if (!buf) return false;
+ uptr line;
+ if (!ParseCommandOutput(buf, addr, &stack->info.function, &stack->info.module,
+ &stack->info.file, &line, nullptr)) {
+ process_ = nullptr;
+ return false;
+ }
+ stack->info.line = (int)line;
+ return true;
+}
+
+bool AtosSymbolizer::SymbolizeData(uptr addr, DataInfo *info) {
+ if (!process_) return false;
+ char command[32];
+ internal_snprintf(command, sizeof(command), "0x%zx\n", addr);
+ const char *buf = process_->SendCommand(command);
+ if (!buf) return false;
+ if (!ParseCommandOutput(buf, addr, &info->name, &info->module, nullptr,
+ nullptr, &info->start)) {
+ process_ = nullptr;
+ return false;
+ }
+ return true;
+}
+
+} // namespace __sanitizer
+
+#endif // SANITIZER_MAC