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Issue 126143005: Remove Chrome Frame code and resources. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: sync to r244038 Created 6 years, 11 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Main entry point for a DLL that can be instructed to crash on
6 // load or unload by setting an environment variable appropriately.
7 //
8 // Note: This code has no CRT to lean on, because some versions of the CRT
9 // have a bug whereby they leave dangling state after taking an exception
10 // during DLL_PROCESS_ATTACH. This in turn causes the loading process to
11 // crash on exit. To work around this, this DLL has its entrypoint set
12 // to the DllMain routine and does not link with the CRT.
13
14 #include <windows.h>
15
16 #include "crash_dll.h"
17
18 void Crash() {
19 char* null_pointer = reinterpret_cast<char*>(kCrashAddress);
20
21 *null_pointer = '\0';
22 }
23
24 void CrashConditionally(const wchar_t* name) {
25 wchar_t value[1024];
26 DWORD ret = ::GetEnvironmentVariable(name, value, ARRAYSIZE(value));
27 if (ret != 0 || ERROR_ENVVAR_NOT_FOUND != ::GetLastError())
28 Crash();
29 }
30
31 extern "C" BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason,
32 LPVOID reserved) {
33 if (reason == DLL_PROCESS_ATTACH)
34 CrashConditionally(kCrashOnLoadMode);
35 else if (reason == DLL_PROCESS_DETACH)
36 CrashConditionally(kCrashOnUnloadMode);
37
38 return 1;
39 }
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