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windows: first shot at naming threads with SetThreadDescription().
This is a bleeding edge API, added to Windows 10 Anniversary Edition (build 1607, specifically). https://msdn.microsoft.com/en-us/library/windows/desktop/mt774976(v=vs.85).aspx Nothing supports this yet, including WinDbg, Visual Studio, minidumps, etc, so we still need to also use the RaiseException hack. But presumably tools will use this API as a more robust and universal way to get thread names sooner or later, so we'll start broadcasting to it now.
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@ -164,26 +164,53 @@ typedef struct tagTHREADNAME_INFO
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} THREADNAME_INFO;
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#pragma pack(pop)
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typedef HRESULT (WINAPI *pfnSetThreadDescription)(HANDLE, PCWSTR);
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void
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SDL_SYS_SetupThread(const char *name)
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{
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if ((name != NULL) && IsDebuggerPresent()) {
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THREADNAME_INFO inf;
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if (name != NULL) {
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static HMODULE kernel32 = 0;
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static pfnSetThreadDescription pSetThreadDescription = NULL;
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/* C# and friends will try to catch this Exception, let's avoid it. */
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if (SDL_GetHintBoolean(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING, SDL_FALSE)) {
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return;
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if (!kernel32) {
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kernel32 = LoadLibrary(L"kernel32.dll");
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if (kernel32) {
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pSetThreadDescription = (pfnSetThreadDescription) GetProcAddress(kernel32, "SetThreadDescription");
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}
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}
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/* This magic tells the debugger to name a thread if it's listening. */
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SDL_zero(inf);
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inf.dwType = 0x1000;
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inf.szName = name;
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inf.dwThreadID = (DWORD) -1;
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inf.dwFlags = 0;
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if (pSetThreadDescription != NULL) {
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WCHAR *strw = WIN_UTF8ToString(name);
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if (strw) {
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pSetThreadDescription(GetCurrentThread(), strw);
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SDL_free(strw);
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}
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}
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/* The debugger catches this, renames the thread, continues on. */
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RaiseException(0x406D1388, 0, sizeof(inf) / sizeof(ULONG), (const ULONG_PTR*) &inf);
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/* Presumably some version of Visual Studio will understand SetThreadDescription(),
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but we still need to deal with older OSes and debuggers. Set it with the arcane
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exception magic, too. */
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if (IsDebuggerPresent()) {
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THREADNAME_INFO inf;
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/* C# and friends will try to catch this Exception, let's avoid it. */
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if (SDL_GetHintBoolean(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING, SDL_FALSE)) {
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return;
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}
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/* This magic tells the debugger to name a thread if it's listening. */
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SDL_zero(inf);
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inf.dwType = 0x1000;
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inf.szName = name;
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inf.dwThreadID = (DWORD) -1;
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inf.dwFlags = 0;
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/* The debugger catches this, renames the thread, continues on. */
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RaiseException(0x406D1388, 0, sizeof(inf) / sizeof(ULONG), (const ULONG_PTR*) &inf);
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}
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}
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}
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