How to get thread stack information on Windows?

Question

I enumerate all threads in a process through the CreateToolhelp32Snapshot function. I would like to get some basic stack information for each thread. More specifically I would like to get stack bottom address and if possible I would like to get current stack top address. Basically this is the information displayed with the ~*k command in WinDbg. So how can I obtain the stack information from the thread's ID or HANDLE?

Answer 1

(Definitions can be found here.)

To get stack boundaries:

THREAD_BASIC_INFORMATION basicInfo;
NT_TIB tib;

// Get TEB address
NtQueryInformationThread(YOUR_THREAD_HANDLE, ThreadBasicInformation, &basicInfo, sizeof(THREAD_BASIC_INFORMATION), NULL);
// Read TIB
NtReadVirtualMemory(YOUR_PROCESS_HANDLE, basicInfo.TebBaseAddress, &tib, sizeof(NT_TIB), NULL);
// Check tib.StackBase and tib.StackLimit

To get the value of esp, simply use GetThreadContext.

Answer 2

An easier way without having to involve the Windows Driver Kit is as so:

NT_TIB* tib = (NT_TIB*)__readfsdword(0x18);
size_t* stackBottom = (size_t*)tib->StackLimit;
size_t* stackTop = (size_t*)tib->StackBase;