[chrome_elf] Big ELF cleanup. Part 1.

chrome_elf/chrome_elf_main.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome_elf/chrome_elf_main.h"
 
+#include <assert.h>
 #include <windows.h>
-#include <algorithm>
 
-#include "base/lazy_instance.h"
-#include "base/strings/string16.h"
-#include "base/win/iat_patch_function.h"
-#include "build/build_config.h"
-#include "chrome/app/chrome_crash_reporter_client_win.h"
 #include "chrome/install_static/install_util.h"
 #include "chrome_elf/blacklist/blacklist.h"
-#include "chrome_elf/blacklist/crashpad_helper.h"
-#include "chrome_elf/chrome_elf_constants.h"
-#include "components/crash/content/app/crashpad.h"
-#include "components/crash/core/common/crash_keys.h"
-
-namespace {
-
-base::LazyInstance<std::vector<crash_reporter::Report>>::Leaky g_crash_reports =
-    LAZY_INSTANCE_INITIALIZER;
-
-#if !defined(ADDRESS_SANITIZER)
-// chrome_elf loads early in the process and initializes Crashpad. That in turn
-// uses the SetUnhandledExceptionFilter API to set a top level exception
-// handler for the process. When the process eventually initializes, CRT sets
-// an exception handler which calls TerminateProcess which effectively bypasses
-// us. Ideally we want to be at the top of the unhandled exception filter
-// chain. However we don't have a good way of intercepting the
-// SetUnhandledExceptionFilter API in the sandbox. EAT patching kernel32 or
-// kernelbase should ideally work. However the kernel32 kernelbase dlls are
-// prebound which causes EAT patching to not work. Sidestep works. However it
-// is only supported for 32 bit. For now we use IAT patching for the
-// executable.
-// TODO(ananta).
-// Check if it is possible to fix EAT patching or use sidestep patching for
-// 32 bit and 64 bit for this purpose.
-base::win::IATPatchFunction g_set_unhandled_exception_filter;
-
-LPTOP_LEVEL_EXCEPTION_FILTER WINAPI
-SetUnhandledExceptionFilterPatch(LPTOP_LEVEL_EXCEPTION_FILTER filter) {
-  // Don't set the exception filter. Please see above for comments.
-  return nullptr;
-}
-
-// Please refer above to more information about why we intercept the
-// SetUnhandledExceptionFilter API.
-void DisableSetUnhandledExceptionFilter() {
-  DWORD patched = g_set_unhandled_exception_filter.PatchFromModule(
-      GetModuleHandle(nullptr), "kernel32.dll", "SetUnhandledExceptionFilter",
-      SetUnhandledExceptionFilterPatch);
-  CHECK(patched == 0);
-}
-#endif // !defined(ADDRESS_SANITIZER)
-
-}  // namespace
+#include "chrome_elf/crash/crash_helper.h"
 
 void SignalChromeElf() {
   blacklist::ResetBeacon();
 }
 
-// This helper is invoked by code in chrome.dll to retrieve the crash reports.
-// See CrashUploadListCrashpad. Note that we do not pass an std::vector here,
-// because we do not want to allocate/free in different modules. The returned
-// pointer is read-only.
-extern "C" __declspec(dllexport) void GetCrashReportsImpl(
-    const crash_reporter::Report** reports,
-    size_t* report_count) {
-  crash_reporter::GetReports(g_crash_reports.Pointer());
-  *reports = g_crash_reports.Pointer()->data();
-  *report_count = g_crash_reports.Pointer()->size();
-}
-
-// This helper is invoked by debugging code in chrome to register the client
-// id.
-extern "C" __declspec(dllexport) void SetMetricsClientId(
-    const char* client_id) {
-  if (client_id)
-    crash_keys::SetMetricsClientIdFromGUID(client_id);
-}
-
 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) {
   if (reason == DLL_PROCESS_ATTACH) {
-    ChromeCrashReporterClient::InitializeCrashReportingForProcess();
-    // CRT on initialization installs an exception filter which calls
-    // TerminateProcess. We need to hook CRT's attempt to set an exception
-    // handler and ignore it. Don't do this when ASan is present, or ASan will
-    // fail to install its own unhandled exception filter.
+    if (!elf_crash::InitializeCrashReporting()) {
+#ifdef _DEBUG
+      assert(false);
+#endif  // _DEBUG
+    }
+// CRT on initialization installs an exception filter which calls
+// TerminateProcess. We need to hook CRT's attempt to set an exception.
+// NOTE: Do not hook if ASan is present, or ASan will fail to install
+// its own unhandled exception filter.
 #if !defined(ADDRESS_SANITIZER)
-    DisableSetUnhandledExceptionFilter();
-#endif
+    elf_crash::DisableSetUnhandledExceptionFilter();
+#endif  // !defined (ADDRESS_SANITIZER)
 
     install_static::InitializeProcessType();
 
     __try {
       blacklist::Initialize(false);  // Don't force, abort if beacon is present.
-    } __except(GenerateCrashDump(GetExceptionInformation())) {
+    } __except (elf_crash::GenerateCrashDump(GetExceptionInformation())) {
     }
+  } else if (reason == DLL_PROCESS_DETACH) {
+    elf_crash::ShutdownCrashReporting();
   }
   return TRUE;
 }