Create snapshot/mac and move some files from snapshot and util to there

snapshot/exception_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/exception_snapshot_mac.h"
-
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-#include "snapshot/cpu_context_mac.h"
-#include "util/mac/process_reader.h"
-#include "util/mach/exc_server_variants.h"
-#include "util/numeric/safe_assignment.h"
-
-namespace crashpad {
-namespace internal {
-
-ExceptionSnapshotMac::ExceptionSnapshotMac()
-    : ExceptionSnapshot(),
-      context_union_(),
-      context_(),
-      codes_(),
-      thread_id_(0),
-      exception_address_(0),
-      exception_(0),
-      exception_code_0_(0),
-      initialized_() {
-}
-
-ExceptionSnapshotMac::~ExceptionSnapshotMac() {
-}
-
-bool ExceptionSnapshotMac::Initialize(ProcessReader* process_reader,
-                                      thread_t exception_thread,
-                                      exception_type_t exception,
-                                      const mach_exception_data_type_t* code,
-                                      mach_msg_type_number_t code_count,
-                                      thread_state_flavor_t flavor,
-                                      const natural_t* state,
-                                      mach_msg_type_number_t state_count) {
-  INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
-
-  codes_.push_back(exception);
-  for (mach_msg_type_number_t code_index = 0;
-       code_index < code_count;
-       ++code_index) {
-    codes_.push_back(code[code_index]);
-  }
-
-  exception_ = exception;
-  mach_exception_code_t exception_code_0 = code[0];
-
-  if (exception_ == EXC_CRASH) {
-    exception_ = ExcCrashRecoverOriginalException(
-        exception_code_0, &exception_code_0, nullptr);
-  }
-
-  // ExceptionInfo() returns code[0] in a 32-bit field. This shouldn’t be a
-  // problem because code[0]’s values never exceed 32 bits. Only code[1] is ever
-  // expected to be that wide.
-  if (!AssignIfInRange(&exception_code_0_, exception_code_0)) {
-    LOG(WARNING)
-        << base::StringPrintf("exception_code_0 0x%llx out of range",
-                              exception_code_0);
-    return false;
-  }
-
-  const ProcessReader::Thread* thread = nullptr;
-  for (const ProcessReader::Thread& loop_thread : process_reader->Threads()) {
-    if (exception_thread == loop_thread.port) {
-      thread = &loop_thread;
-      break;
-    }
-  }
-
-  if (!thread) {
-    LOG(WARNING) << "exception_thread not found in task";
-    return false;
-  }
-
-  thread_id_ = thread->id;
-
-  // Normally, the exception address is present in code[1] for EXC_BAD_ACCESS
-  // exceptions, but not for other types of exceptions.
-  bool code_1_is_exception_address = exception_ == EXC_BAD_ACCESS;
-
-#if defined(ARCH_CPU_X86_FAMILY)
-  if (process_reader->Is64Bit()) {
-    context_.architecture = kCPUArchitectureX86_64;
-    context_.x86_64 = &context_union_.x86_64;
-    InitializeCPUContextX86_64(context_.x86_64,
-                               flavor,
-                               state,
-                               state_count,
-                               &thread->thread_context.t64,
-                               &thread->float_context.f64,
-                               &thread->debug_context.d64);
-  } else {
-    context_.architecture = kCPUArchitectureX86;
-    context_.x86 = &context_union_.x86;
-    InitializeCPUContextX86(context_.x86,
-                            flavor,
-                            state,
-                            state_count,
-                            &thread->thread_context.t32,
-                            &thread->float_context.f32,
-                            &thread->debug_context.d32);
-  }
-
-  // For x86 and x86_64 EXC_BAD_ACCESS exceptions, some code[0] values indicate
-  // that code[1] does not (or may not) carry the exception address:
-  // EXC_I386_GPFLT (10.9.5 xnu-2422.115.4/osfmk/i386/trap.c user_trap() for
-  // T_GENERAL_PROTECTION) and the oddball (VM_PROT_READ | VM_PROT_EXECUTE)
-  // which collides with EXC_I386_BOUNDFLT (10.9.5
-  // xnu-2422.115.4/osfmk/i386/fpu.c fpextovrflt()). Other EXC_BAD_ACCESS
-  // exceptions come through 10.9.5 xnu-2422.115.4/osfmk/i386/trap.c
-  // user_page_fault_continue() and do contain the exception address in code[1].
-  if (exception_ == EXC_BAD_ACCESS &&
-      (exception_code_0_ == EXC_I386_GPFLT ||
-       exception_code_0_ == (VM_PROT_READ | VM_PROT_EXECUTE))) {
-    code_1_is_exception_address = false;
-  }
-#endif
-
-  if (code_1_is_exception_address) {
-    exception_address_ = code[1];
-  } else {
-    exception_address_ = context_.InstructionPointer();
-  }
-
-  INITIALIZATION_STATE_SET_VALID(initialized_);
-  return true;
-}
-
-const CPUContext* ExceptionSnapshotMac::Context() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return &context_;
-}
-
-uint64_t ExceptionSnapshotMac::ThreadID() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return thread_id_;
-}
-
-uint32_t ExceptionSnapshotMac::Exception() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return exception_;
-}
-
-uint32_t ExceptionSnapshotMac::ExceptionInfo() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return exception_code_0_;
-}
-
-uint64_t ExceptionSnapshotMac::ExceptionAddress() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return exception_address_;
-}
-
-const std::vector<uint64_t>& ExceptionSnapshotMac::Codes() const {
-  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return codes_;
-}
-
-}  // namespace internal
-}  // namespace crashpad