Add ModuleSnapshotMac

snapshot/mac/module_snapshot_mac.cc

+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "snapshot/mac/module_snapshot_mac.h"
+
+#include <mach/mach.h>
+#include <mach-o/loader.h>
+
+#include "base/strings/stringprintf.h"
+#include "snapshot/mac/mach_o_image_annotations_reader.h"
+#include "snapshot/mac/mach_o_image_reader.h"
+#include "util/misc/uuid.h"
+#include "util/stdlib/strnlen.h"
+
+namespace crashpad {
+namespace internal {
+
+ModuleSnapshotMac::ModuleSnapshotMac()
+    : ModuleSnapshot(),
+      name_(),
+      timestamp_(0),
+      mach_o_image_reader_(nullptr),
+      process_reader_(nullptr),
+      initialized_() {
+}
+
+ModuleSnapshotMac::~ModuleSnapshotMac() {
+}
+
+bool ModuleSnapshotMac::Initialize(
+    ProcessReader* process_reader,
+    const ProcessReader::Module& process_reader_module) {
+  INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
+
+  process_reader_ = process_reader;
+  name_ = process_reader_module.name;
+  timestamp_ = process_reader_module.timestamp;
+  mach_o_image_reader_ = process_reader_module.reader;
+  if (!mach_o_image_reader_) {
+    return false;
+  }
+
+  INITIALIZATION_STATE_SET_VALID(initialized_);
+  return true;
+}
+
+std::string ModuleSnapshotMac::Name() const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  return name_;
+}
+
+uint64_t ModuleSnapshotMac::Address() const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  return mach_o_image_reader_->Address();
+}
+
+uint64_t ModuleSnapshotMac::Size() const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  return mach_o_image_reader_->Size();
+}
+
+time_t ModuleSnapshotMac::Timestamp() const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  return timestamp_;
+}
+
+void ModuleSnapshotMac::FileVersion(uint16_t* version_0,
+                                    uint16_t* version_1,
+                                    uint16_t* version_2,
+                                    uint16_t* version_3) const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  if (mach_o_image_reader_->FileType() == MH_DYLIB) {
+    uint32_t dylib_version = mach_o_image_reader_->DylibVersion();
+    *version_0 = (dylib_version & 0xffff0000) >> 16;
+    *version_1 = (dylib_version & 0x0000ff00) >> 8;
+    *version_2 = (dylib_version & 0x000000ff);
+    *version_3 = 0;
+  } else {
+    *version_0 = 0;
+    *version_1 = 0;
+    *version_2 = 0;
+    *version_3 = 0;
+  }
+}
+
+void ModuleSnapshotMac::SourceVersion(uint16_t* version_0,
+                                      uint16_t* version_1,
+                                      uint16_t* version_2,
+                                      uint16_t* version_3) const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+
+  // LC_SOURCE_VERSION is supposed to be interpreted as a 5-component version
+  // number, 24 bits for the first component and 10 for the others, per
+  // <mach-o/loader.h>. To preserve the full range of possible version numbers
+  // without data loss, map it to the 4 16-bit fields mandated by the interface
+  // here, which was informed by the minidump file format.
+  uint64_t source_version = mach_o_image_reader_->SourceVersion();
+  *version_0 = (source_version & 0xffff000000000000u) >> 48;
+  *version_1 = (source_version & 0x0000ffff00000000u) >> 32;
+  *version_2 = (source_version & 0x00000000ffff0000u) >> 16;
+  *version_3 = source_version & 0x000000000000ffffu;
+}
+
+ModuleSnapshot::ModuleType ModuleSnapshotMac::GetModuleType() const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+
+  uint32_t file_type = mach_o_image_reader_->FileType();
+  switch (file_type) {
+    case MH_EXECUTE:
+      return kModuleTypeExecutable;
+    case MH_DYLIB:
+      return kModuleTypeSharedLibrary;
+    case MH_DYLINKER:
+      return kModuleTypeDynamicLoader;
+    case MH_BUNDLE:
+      return kModuleTypeLoadableModule;
+    default:
+      return kModuleTypeUnknown;
+  }
+}
+
+void ModuleSnapshotMac::UUID(crashpad::UUID* uuid) const {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  return mach_o_image_reader_->UUID(uuid);
+}
+
+std::vector<std::string> ModuleSnapshotMac::AnnotationsVector() const {
+  MachOImageAnnotationsReader annotations_reader(
+      process_reader_, mach_o_image_reader_, name_);
+  return annotations_reader.Vector();
+}
+
+std::map<std::string, std::string> ModuleSnapshotMac::AnnotationsSimpleMap()
+    const {
+  MachOImageAnnotationsReader annotations_reader(
+      process_reader_, mach_o_image_reader_, name_);
+  return annotations_reader.SimpleMap();
+}
+
+}  // namespace internal
+}  // namespace crashpad