* Added breakpad support for Linux.

thirdparty/breakpad/processor/module_serializer.cc

@@ -0,0 +1,200 @@
+// 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.
+//
+// module_serializer.cc: ModuleSerializer implementation.
+//
+// See module_serializer.h for documentation.
+//
+// Author: Siyang Xie (lambxsy@google.com)
+
+#include "processor/module_serializer.h"
+
+#include <map>
+#include <string>
+
+#include "processor/basic_code_module.h"
+#include "processor/logging.h"
+
+namespace google_breakpad {
+
+// Definition of static member variable in SimplerSerializer<Funcion>, which
+// is declared in file "simple_serializer-inl.h"
+RangeMapSerializer< MemAddr, linked_ptr<BasicSourceLineResolver::Line> >
+SimpleSerializer<BasicSourceLineResolver::Function>::range_map_serializer_;
+
+size_t ModuleSerializer::SizeOf(const BasicSourceLineResolver::Module &module) {
+  size_t total_size_alloc_ = 0;
+
+  // Compute memory size for each map component in Module class.
+  int map_index = 0;
+  map_sizes_[map_index++] = files_serializer_.SizeOf(module.files_);
+  map_sizes_[map_index++] = functions_serializer_.SizeOf(module.functions_);
+  map_sizes_[map_index++] = pubsym_serializer_.SizeOf(module.public_symbols_);
+  for (int i = 0; i < WindowsFrameInfo::STACK_INFO_LAST; ++i)
+   map_sizes_[map_index++] =
+       wfi_serializer_.SizeOf(&(module.windows_frame_info_[i]));
+  map_sizes_[map_index++] = cfi_init_rules_serializer_.SizeOf(
+     module.cfi_initial_rules_);
+  map_sizes_[map_index++] = cfi_delta_rules_serializer_.SizeOf(
+     module.cfi_delta_rules_);
+
+  // Header size.
+  total_size_alloc_ = kNumberMaps_ * sizeof(u_int32_t);
+
+  for (int i = 0; i < kNumberMaps_; ++i)
+   total_size_alloc_ += map_sizes_[i];
+
+  // Extra one byte for null terminator for C-string copy safety.
+  ++total_size_alloc_;
+
+  return total_size_alloc_;
+}
+
+char *ModuleSerializer::Write(const BasicSourceLineResolver::Module &module,
+                              char *dest) {
+  // Write header.
+  memcpy(dest, map_sizes_, kNumberMaps_ * sizeof(u_int32_t));
+  dest += kNumberMaps_ * sizeof(u_int32_t);
+  // Write each map.
+  dest = files_serializer_.Write(module.files_, dest);
+  dest = functions_serializer_.Write(module.functions_, dest);
+  dest = pubsym_serializer_.Write(module.public_symbols_, dest);
+  for (int i = 0; i < WindowsFrameInfo::STACK_INFO_LAST; ++i)
+    dest = wfi_serializer_.Write(&(module.windows_frame_info_[i]), dest);
+  dest = cfi_init_rules_serializer_.Write(module.cfi_initial_rules_, dest);
+  dest = cfi_delta_rules_serializer_.Write(module.cfi_delta_rules_, dest);
+  // Write a null terminator.
+  dest = SimpleSerializer<char>::Write(0, dest);
+  return dest;
+}
+
+char* ModuleSerializer::Serialize(
+    const BasicSourceLineResolver::Module &module, unsigned int *size) {
+  // Compute size of memory to allocate.
+  unsigned int size_to_alloc = SizeOf(module);
+
+  // Allocate memory for serialized data.
+  char *serialized_data = new char[size_to_alloc];
+  if (!serialized_data) {
+    BPLOG(ERROR) << "ModuleSerializer: memory allocation failed, "
+                 << "size to alloc: " << size_to_alloc;
+    if (size) *size = 0;
+    return NULL;
+  }
+
+  // Write serialized data to allocated memory chunk.
+  char *end_address = Write(module, serialized_data);
+  // Verify the allocated memory size is equal to the size of data been written.
+  unsigned int size_written =
+      static_cast<unsigned int>(end_address - serialized_data);
+  if (size_to_alloc != size_written) {
+    BPLOG(ERROR) << "size_to_alloc differs from size_written: "
+                   << size_to_alloc << " vs " << size_written;
+  }
+
+  // Set size and return the start address of memory chunk.
+  if (size)
+    *size = size_to_alloc;
+  return serialized_data;
+}
+
+bool ModuleSerializer::SerializeModuleAndLoadIntoFastResolver(
+    const BasicSourceLineResolver::ModuleMap::const_iterator &iter,
+    FastSourceLineResolver *fast_resolver) {
+  BPLOG(INFO) << "Converting symbol " << iter->first.c_str();
+
+  // Cast SourceLineResolverBase::Module* to BasicSourceLineResolver::Module*.
+  BasicSourceLineResolver::Module* basic_module =
+      dynamic_cast<BasicSourceLineResolver::Module*>(iter->second);
+
+  unsigned int size = 0;
+  scoped_array<char> symbol_data(Serialize(*basic_module, &size));
+  if (!symbol_data.get()) {
+    BPLOG(ERROR) << "Serialization failed for module: " << basic_module->name_;
+    return false;
+  }
+  BPLOG(INFO) << "Serialized Symbol Size " << size;
+
+  // Copy the data into string.
+  // Must pass string to LoadModuleUsingMapBuffer(), instead of passing char* to
+  // LoadModuleUsingMemoryBuffer(), becaused of data ownership/lifetime issue.
+  string symbol_data_string(symbol_data.get(), size);
+  symbol_data.reset();
+
+  scoped_ptr<CodeModule> code_module(
+      new BasicCodeModule(0, 0, iter->first, "", "", "", ""));
+
+  return fast_resolver->LoadModuleUsingMapBuffer(code_module.get(),
+                                                 symbol_data_string);
+}
+
+void ModuleSerializer::ConvertAllModules(
+    const BasicSourceLineResolver *basic_resolver,
+    FastSourceLineResolver *fast_resolver) {
+  // Check for NULL pointer.
+  if (!basic_resolver || !fast_resolver)
+    return;
+
+  // Traverse module list in basic resolver.
+  BasicSourceLineResolver::ModuleMap::const_iterator iter;
+  iter = basic_resolver->modules_->begin();
+  for (; iter != basic_resolver->modules_->end(); ++iter)
+    SerializeModuleAndLoadIntoFastResolver(iter, fast_resolver);
+}
+
+bool ModuleSerializer::ConvertOneModule(
+    const string &moduleid,
+    const BasicSourceLineResolver *basic_resolver,
+    FastSourceLineResolver *fast_resolver) {
+  // Check for NULL pointer.
+  if (!basic_resolver || !fast_resolver)
+    return false;
+
+  BasicSourceLineResolver::ModuleMap::const_iterator iter;
+  iter = basic_resolver->modules_->find(moduleid);
+  if (iter == basic_resolver->modules_->end())
+    return false;
+
+  return SerializeModuleAndLoadIntoFastResolver(iter, fast_resolver);
+}
+
+char* ModuleSerializer::SerializeSymbolFileData(
+    const string &symbol_data, unsigned int *size) {
+  scoped_ptr<BasicSourceLineResolver::Module> module(
+      new BasicSourceLineResolver::Module("no name"));
+  scoped_array<char> buffer(new char[symbol_data.size() + 1]);
+  strcpy(buffer.get(), symbol_data.c_str());
+  if (!module->LoadMapFromMemory(buffer.get())) {
+    return NULL;
+  }
+  buffer.reset(NULL);
+  return Serialize(*(module.get()), size);
+}
+
+}  // namespace google_breakpad