MinGW-w64 set_thread_name

thread_name.c

#include <windows.h>
#include <winnt.h>
#include <winternl.h>

#include <pshpack8.h>
typedef struct {
	DWORD dwType;
	LPCSTR szName;
	DWORD dwThreadID;
	DWORD dwFlags;
} THREADNAME_INFO;
#include <poppack.h>

static EXCEPTION_DISPOSITION NTAPI ignore_handler(EXCEPTION_RECORD *rec,
                                                  void *frame, CONTEXT *ctx,
                                                  void *disp)
{
	return ExceptionContinueExecution;
}

static void set_thread_name(const char *name)
{
	static const DWORD MS_VC_EXCEPTION = 0x406D1388;

	// Don't bother if a debugger isn't attached to receive the event
	if (!IsDebuggerPresent())
		return;

	// Thread information for VS compatible debugger. -1 sets current thread.
	THREADNAME_INFO ti = {
		.dwType = 0x1000,
		.szName = name,
		.dwThreadID = -1,
	};

	// Push an exception handler to ignore all following exceptions
	NT_TIB *tib = ((NT_TIB*)NtCurrentTeb());
	EXCEPTION_REGISTRATION_RECORD rec = {
		.Next = tib->ExceptionList,
		.Handler = ignore_handler,
	};
	tib->ExceptionList = &rec;

	// Visual Studio and compatible debuggers receive thread names from the
	// program through a specially crafted exception
	RaiseException(MS_VC_EXCEPTION, 0, sizeof(ti) / sizeof(ULONG_PTR),
	               (ULONG_PTR*)&ti);

	// Pop exception handler
	tib->ExceptionList = tib->ExceptionList->Next;
}

int main()
{
	set_thread_name("test thread name");
	Sleep(INFINITE);
}