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1//===-- ObjectFileMinidump.cpp --------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "ObjectFileMinidump.h"10 11#include "MinidumpFileBuilder.h"12 13#include "lldb/Core/ModuleSpec.h"14#include "lldb/Core/PluginManager.h"15#include "lldb/Core/Section.h"16#include "lldb/Target/Process.h"17#include "lldb/Utility/LLDBLog.h"18#include "lldb/Utility/Log.h"19 20#include "llvm/Support/FileSystem.h"21 22using namespace lldb;23using namespace lldb_private;24 25LLDB_PLUGIN_DEFINE(ObjectFileMinidump)26 27void ObjectFileMinidump::Initialize() {28  PluginManager::RegisterPlugin(29      GetPluginNameStatic(), GetPluginDescriptionStatic(), CreateInstance,30      CreateMemoryInstance, GetModuleSpecifications, SaveCore);31}32 33void ObjectFileMinidump::Terminate() {34  PluginManager::UnregisterPlugin(CreateInstance);35}36 37ObjectFile *ObjectFileMinidump::CreateInstance(38    const lldb::ModuleSP &module_sp, lldb::DataBufferSP data_sp,39    lldb::offset_t data_offset, const lldb_private::FileSpec *file,40    lldb::offset_t offset, lldb::offset_t length) {41  return nullptr;42}43 44ObjectFile *ObjectFileMinidump::CreateMemoryInstance(45    const lldb::ModuleSP &module_sp, WritableDataBufferSP data_sp,46    const ProcessSP &process_sp, lldb::addr_t header_addr) {47  return nullptr;48}49 50size_t ObjectFileMinidump::GetModuleSpecifications(51    const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,52    lldb::offset_t data_offset, lldb::offset_t file_offset,53    lldb::offset_t length, lldb_private::ModuleSpecList &specs) {54  specs.Clear();55  return 0;56}57 58struct DumpFailRemoveHolder {59  DumpFailRemoveHolder(MinidumpFileBuilder &builder) : m_builder(builder) {}60 61  ~DumpFailRemoveHolder() {62    if (!m_success)63      m_builder.DeleteFile();64  }65 66  void SetSuccess() { m_success = true; }67 68private:69  MinidumpFileBuilder &m_builder;70  bool m_success = false;71};72 73bool ObjectFileMinidump::SaveCore(const lldb::ProcessSP &process_sp,74                                  lldb_private::SaveCoreOptions &options,75                                  lldb_private::Status &error) {76  // Output file and process_sp are both checked in PluginManager::SaveCore.77  assert(options.GetOutputFile().has_value());78  assert(process_sp);79 80  // Minidump defaults to stacks only.81  if (options.GetStyle() == SaveCoreStyle::eSaveCoreUnspecified)82    options.SetStyle(SaveCoreStyle::eSaveCoreStackOnly);83 84  llvm::Expected<lldb::FileUP> maybe_core_file = FileSystem::Instance().Open(85      options.GetOutputFile().value(),86      File::eOpenOptionWriteOnly | File::eOpenOptionCanCreate);87  if (!maybe_core_file) {88    error = Status::FromError(maybe_core_file.takeError());89    return false;90  }91  MinidumpFileBuilder builder(std::move(maybe_core_file.get()), process_sp,92                              options);93  DumpFailRemoveHolder request(builder);94 95  Log *log = GetLog(LLDBLog::Object);96  error = builder.AddHeaderAndCalculateDirectories();97  if (error.Fail()) {98    LLDB_LOGF(log, "AddHeaderAndCalculateDirectories failed: %s",99              error.AsCString());100    return false;101  };102  error = builder.AddSystemInfo();103  if (error.Fail()) {104    LLDB_LOGF(log, "AddSystemInfo failed: %s", error.AsCString());105    return false;106  }107 108  error = builder.AddModuleList();109  if (error.Fail()) {110    LLDB_LOGF(log, "AddModuleList failed: %s", error.AsCString());111    return false;112  }113  error = builder.AddMiscInfo();114  if (error.Fail()) {115    LLDB_LOGF(log, "AddMiscInfo failed: %s", error.AsCString());116    return false;117  }118 119  error = builder.AddThreadList();120  if (error.Fail()) {121    LLDB_LOGF(log, "AddThreadList failed: %s", error.AsCString());122    return false;123  }124 125  error = builder.AddLinuxFileStreams();126  if (error.Fail()) {127    LLDB_LOGF(log, "AddLinuxFileStreams failed: %s", error.AsCString());128    return false;129  }130 131  // Add any exceptions but only if there are any in any threads.132  error = builder.AddExceptions();133  if (error.Fail()) {134    LLDB_LOGF(log, "AddExceptions failed: %s", error.AsCString());135    return false;136  }137 138  // Note: add memory HAS to be the last thing we do. It can overflow into 64b139  // land and many RVA's only support 32b140  error = builder.AddMemoryList();141  if (error.Fail()) {142    LLDB_LOGF(log, "AddMemoryList failed: %s", error.AsCString());143    return false;144  }145 146  error = builder.DumpFile();147  if (error.Fail()) {148    LLDB_LOGF(log, "DumpFile failed: %s", error.AsCString());149    return false;150  }151 152  request.SetSuccess();153 154  return true;155}156