* Added breakpad support for Linux.

thirdparty/breakpad/processor/source_line_resolver_base.cc

@@ -0,0 +1,311 @@
+// Copyright (c) 2010 Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// source_line_resolver_base.cc: Implementation of SourceLineResolverBase.
+//
+// See source_line_resolver_base.h and source_line_resolver_base_types.h for
+// more documentation.
+//
+// Author: Siyang Xie (lambxsy@google.com)
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <map>
+#include <utility>
+
+#include "google_breakpad/processor/source_line_resolver_base.h"
+#include "processor/source_line_resolver_base_types.h"
+#include "processor/module_factory.h"
+
+using std::map;
+using std::make_pair;
+
+namespace google_breakpad {
+
+SourceLineResolverBase::SourceLineResolverBase(
+    ModuleFactory *module_factory)
+  : modules_(new ModuleMap),
+    memory_buffers_(new MemoryMap),
+    module_factory_(module_factory) {
+}
+
+SourceLineResolverBase::~SourceLineResolverBase() {
+  ModuleMap::iterator it;
+  // Iterate through ModuleMap and delete all loaded modules.
+  for (it = modules_->begin(); it != modules_->end(); ++it) {
+    // Delete individual module.
+    delete it->second;
+  }
+  // Delete the map of modules.
+  delete modules_;
+
+  MemoryMap::iterator iter = memory_buffers_->begin();
+  for (; iter != memory_buffers_->end(); ++iter) {
+    delete [] iter->second;
+  }
+  // Delete the map of memory buffers.
+  delete memory_buffers_;
+
+  delete module_factory_;
+}
+
+bool SourceLineResolverBase::ReadSymbolFile(char **symbol_data,
+                                            const string &map_file) {
+  if (symbol_data == NULL) {
+    BPLOG(ERROR) << "Could not Read file into Null memory pointer";
+    return false;
+  }
+
+  struct stat buf;
+  int error_code = stat(map_file.c_str(), &buf);
+  if (error_code == -1) {
+    string error_string;
+    int error_code = ErrnoString(&error_string);
+    BPLOG(ERROR) << "Could not open " << map_file <<
+        ", error " << error_code << ": " << error_string;
+    return false;
+  }
+
+  off_t file_size = buf.st_size;
+
+  // Allocate memory for file contents, plus a null terminator
+  // since we may use strtok() on the contents.
+  *symbol_data = new char[file_size + 1];
+
+  if (*symbol_data == NULL) {
+    BPLOG(ERROR) << "Could not allocate memory for " << map_file;
+    return false;
+  }
+
+  BPLOG(INFO) << "Opening " << map_file;
+
+  FILE *f = fopen(map_file.c_str(), "rt");
+  if (!f) {
+    string error_string;
+    int error_code = ErrnoString(&error_string);
+    BPLOG(ERROR) << "Could not open " << map_file <<
+        ", error " << error_code << ": " << error_string;
+    delete [] (*symbol_data);
+    *symbol_data = NULL;
+    return false;
+  }
+
+  AutoFileCloser closer(f);
+
+  int items_read = 0;
+
+  items_read = fread(*symbol_data, 1, file_size, f);
+
+  if (items_read != file_size) {
+    string error_string;
+    int error_code = ErrnoString(&error_string);
+    BPLOG(ERROR) << "Could not slurp " << map_file <<
+        ", error " << error_code << ": " << error_string;
+    delete [] (*symbol_data);
+    *symbol_data = NULL;
+    return false;
+  }
+
+  (*symbol_data)[file_size] = '\0';
+  return true;
+}
+
+bool SourceLineResolverBase::LoadModule(const CodeModule *module,
+                                        const string &map_file) {
+  if (module == NULL)
+    return false;
+
+  // Make sure we don't already have a module with the given name.
+  if (modules_->find(module->code_file()) != modules_->end()) {
+    BPLOG(INFO) << "Symbols for module " << module->code_file()
+                << " already loaded";
+    return false;
+  }
+
+  BPLOG(INFO) << "Loading symbols for module " << module->code_file()
+              << " from " << map_file;
+
+  char *memory_buffer;
+  if (!ReadSymbolFile(&memory_buffer, map_file))
+    return false;
+
+  BPLOG(INFO) << "Read symbol file " << map_file << " succeeded";
+
+  bool load_result = LoadModuleUsingMemoryBuffer(module, memory_buffer);
+
+  if (load_result && !ShouldDeleteMemoryBufferAfterLoadModule()) {
+    // memory_buffer has to stay alive as long as the module.
+    memory_buffers_->insert(make_pair(module->code_file(), memory_buffer));
+  } else {
+    delete [] memory_buffer;
+  }
+
+  return load_result;
+}
+
+bool SourceLineResolverBase::LoadModuleUsingMapBuffer(
+    const CodeModule *module, const string &map_buffer) {
+  if (module == NULL)
+    return false;
+
+  // Make sure we don't already have a module with the given name.
+  if (modules_->find(module->code_file()) != modules_->end()) {
+    BPLOG(INFO) << "Symbols for module " << module->code_file()
+                << " already loaded";
+    return false;
+  }
+
+  char *memory_buffer = new char[map_buffer.size() + 1];
+  if (memory_buffer == NULL) {
+    BPLOG(ERROR) << "Could not allocate memory for " << module->code_file();
+    return false;
+  }
+
+  // Can't use strcpy, as the data may contain '\0's before the end.
+  memcpy(memory_buffer, map_buffer.c_str(), map_buffer.size());
+  memory_buffer[map_buffer.size()] = '\0';
+
+  bool load_result = LoadModuleUsingMemoryBuffer(module, memory_buffer);
+
+  if (load_result && !ShouldDeleteMemoryBufferAfterLoadModule()) {
+    // memory_buffer has to stay alive as long as the module.
+    memory_buffers_->insert(make_pair(module->code_file(), memory_buffer));
+  } else {
+    delete [] memory_buffer;
+  }
+
+  return load_result;
+}
+
+bool SourceLineResolverBase::LoadModuleUsingMemoryBuffer(
+    const CodeModule *module, char *memory_buffer) {
+  if (!module)
+    return false;
+
+  // Make sure we don't already have a module with the given name.
+  if (modules_->find(module->code_file()) != modules_->end()) {
+    BPLOG(INFO) << "Symbols for module " << module->code_file()
+                << " already loaded";
+    return false;
+  }
+
+  BPLOG(INFO) << "Loading symbols for module " << module->code_file()
+             << " from memory buffer";
+
+  Module *basic_module = module_factory_->CreateModule(module->code_file());
+
+  // Ownership of memory is NOT transfered to Module::LoadMapFromMemory().
+  if (!basic_module->LoadMapFromMemory(memory_buffer)) {
+    delete basic_module;
+    return false;
+  }
+
+  modules_->insert(make_pair(module->code_file(), basic_module));
+  return true;
+}
+
+bool SourceLineResolverBase::ShouldDeleteMemoryBufferAfterLoadModule() {
+  return true;
+}
+
+void SourceLineResolverBase::UnloadModule(const CodeModule *code_module) {
+  if (!code_module)
+    return;
+
+  ModuleMap::iterator iter = modules_->find(code_module->code_file());
+  if (iter != modules_->end()) {
+    Module *symbol_module = iter->second;
+    delete symbol_module;
+    modules_->erase(iter);
+  }
+
+  if (ShouldDeleteMemoryBufferAfterLoadModule()) {
+    // No-op.  Because we never store any memory buffers.
+  } else {
+    // There may be a buffer stored locally, we need to find and delete it.
+    MemoryMap::iterator iter = memory_buffers_->find(code_module->code_file());
+    if (iter != memory_buffers_->end()) {
+      delete [] iter->second;
+      memory_buffers_->erase(iter);
+    }
+  }
+}
+
+bool SourceLineResolverBase::HasModule(const CodeModule *module) {
+  if (!module)
+    return false;
+  return modules_->find(module->code_file()) != modules_->end();
+}
+
+void SourceLineResolverBase::FillSourceLineInfo(StackFrame *frame) {
+  if (frame->module) {
+    ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
+    if (it != modules_->end()) {
+      it->second->LookupAddress(frame);
+    }
+  }
+}
+
+WindowsFrameInfo *SourceLineResolverBase::FindWindowsFrameInfo(
+    const StackFrame *frame) {
+  if (frame->module) {
+    ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
+    if (it != modules_->end()) {
+      return it->second->FindWindowsFrameInfo(frame);
+    }
+  }
+  return NULL;
+}
+
+CFIFrameInfo *SourceLineResolverBase::FindCFIFrameInfo(
+    const StackFrame *frame) {
+  if (frame->module) {
+    ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
+    if (it != modules_->end()) {
+      return it->second->FindCFIFrameInfo(frame);
+    }
+  }
+  return NULL;
+}
+
+bool SourceLineResolverBase::CompareString::operator()(
+    const string &s1, const string &s2) const {
+  return strcmp(s1.c_str(), s2.c_str()) < 0;
+}
+
+bool SourceLineResolverBase::Module::ParseCFIRuleSet(
+    const string &rule_set, CFIFrameInfo *frame_info) const {
+  CFIFrameInfoParseHandler handler(frame_info);
+  CFIRuleParser parser(&handler);
+  return parser.Parse(rule_set);
+}
+
+}  // namespace google_breakpad