如何识别从 msvc 中的线程或进程调用的函数

Question

我有如下程序，函数Foo由threds和main进程调用。现在如何识别功能 Foo是由线程或主进程调用的。

#include <Windows.h>
#include <stdio.h>
DWORD WINAPI Foo(LPVOID lPtr);
int main()
{
DWORD dwExitCode;
DWORD dwThreadID;
HANDLE hT[10];
int i;
for( i = 0; i<5; i++)
hT[i] = CreateThread(
NULL,
0,
Foo,
0,
0,
&dwThreadID
);
fflush(stdout); 
Foo(0);
return 0;
}
DWORD WINAPI Foo(LPVOID lPtr){
printf("ninside the Function");
return 0;
}

Answer 1

在main()中调用GetCurrentThreadId()，然后在Foo()中再次调用，并查看两个值是否匹配，例如：

#include <Windows.h>
#include <stdio.h>
DWORD WINAPI Foo(LPVOID lPtr);
DWORD dwMainThreadId;
int main() {
DWORD dwExitCode;
DWORD dwThreadID;
HANDLE hT[10];
int i;
dwMainThreadId = GetCurrentThreadId();
for( i = 0; i<5; i++)
hT[i] = CreateThread(
NULL,
0,
Foo,
0,
0,
&dwThreadID
);
fflush(stdout);
Foo(0);
return 0;
}
DWORD WINAPI Foo(LPVOID lPtr){
DWORD dwThisThreadId = GetCurrentThreadId();
printf(
"ninside the Function in thread %u (%s)",
dwThisThreadId,
(dwThisThreadId == dwMainThreadId) ? "main" : "worker"
);
return 0;
}