331 lines
8.4 KiB
C
331 lines
8.4 KiB
C
|
|
#include <stdio.h>
|
|
#include <winpr/crt.h>
|
|
#include <winpr/windows.h>
|
|
#include <winpr/synch.h>
|
|
#include <winpr/sysinfo.h>
|
|
#include <winpr/thread.h>
|
|
#include <winpr/interlocked.h>
|
|
|
|
#define TEST_SYNC_CRITICAL_TEST1_RUNTIME_MS 500
|
|
#define TEST_SYNC_CRITICAL_TEST1_RUNS 4
|
|
|
|
CRITICAL_SECTION critical;
|
|
LONG gTestValueVulnerable = 0;
|
|
LONG gTestValueSerialized = 0;
|
|
|
|
BOOL TestSynchCritical_TriggerAndCheckRaceCondition(HANDLE OwningThread, LONG RecursionCount)
|
|
{
|
|
/* if called unprotected this will hopefully trigger a race condition ... */
|
|
gTestValueVulnerable++;
|
|
|
|
if (critical.OwningThread != OwningThread)
|
|
{
|
|
printf("CriticalSection failure: OwningThread is invalid\n");
|
|
return FALSE;
|
|
}
|
|
if (critical.RecursionCount != RecursionCount)
|
|
{
|
|
printf("CriticalSection failure: RecursionCount is invalid\n");
|
|
return FALSE;
|
|
}
|
|
|
|
/* ... which we try to detect using the serialized counter */
|
|
if (gTestValueVulnerable != InterlockedIncrement(&gTestValueSerialized))
|
|
{
|
|
printf("CriticalSection failure: Data corruption detected\n");
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* this thread function shall increment the global dwTestValue until the PBOOL passsed in arg is FALSE */
|
|
static PVOID TestSynchCritical_Test1(PVOID arg)
|
|
{
|
|
int i, j, rc;
|
|
HANDLE hThread = (HANDLE) (ULONG_PTR) GetCurrentThreadId();
|
|
|
|
PBOOL pbContinueRunning = (PBOOL)arg;
|
|
|
|
while(*pbContinueRunning)
|
|
{
|
|
EnterCriticalSection(&critical);
|
|
|
|
rc = 1;
|
|
|
|
if (!TestSynchCritical_TriggerAndCheckRaceCondition(hThread, rc))
|
|
return (PVOID)1;
|
|
|
|
/* add some random recursion level */
|
|
j = rand()%5;
|
|
for (i=0; i<j; i++)
|
|
{
|
|
if (!TestSynchCritical_TriggerAndCheckRaceCondition(hThread, rc++))
|
|
return (PVOID)2;
|
|
EnterCriticalSection(&critical);
|
|
}
|
|
for (i=0; i<j; i++)
|
|
{
|
|
if (!TestSynchCritical_TriggerAndCheckRaceCondition(hThread, rc--))
|
|
return (PVOID)2;
|
|
LeaveCriticalSection(&critical);
|
|
}
|
|
|
|
if (!TestSynchCritical_TriggerAndCheckRaceCondition(hThread, rc))
|
|
return (PVOID)3;
|
|
|
|
LeaveCriticalSection(&critical);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* this thread function tries to call TryEnterCriticalSection while the main thread holds the lock */
|
|
static PVOID TestSynchCritical_Test2(PVOID arg)
|
|
{
|
|
if (TryEnterCriticalSection(&critical)==TRUE)
|
|
{
|
|
LeaveCriticalSection(&critical);
|
|
return (PVOID)1;
|
|
}
|
|
return (PVOID)0;
|
|
}
|
|
|
|
|
|
static PVOID TestSynchCritical_Main(PVOID arg)
|
|
{
|
|
int i, j;
|
|
SYSTEM_INFO sysinfo;
|
|
DWORD dwPreviousSpinCount;
|
|
DWORD dwSpinCount;
|
|
DWORD dwSpinCountExpected;
|
|
HANDLE hMainThread;
|
|
HANDLE* hThreads;
|
|
HANDLE hThread;
|
|
DWORD dwThreadCount;
|
|
DWORD dwThreadExitCode;
|
|
BOOL bTest1Running;
|
|
|
|
PBOOL pbThreadTerminated = (PBOOL)arg;
|
|
|
|
GetNativeSystemInfo(&sysinfo);
|
|
|
|
hMainThread = (HANDLE) (ULONG_PTR) GetCurrentThreadId();
|
|
|
|
/**
|
|
* Test SpinCount in SetCriticalSectionSpinCount, InitializeCriticalSectionEx and InitializeCriticalSectionAndSpinCount
|
|
* SpinCount must be forced to be zero on on uniprocessor systems and on systems
|
|
* where WINPR_CRITICAL_SECTION_DISABLE_SPINCOUNT is defined
|
|
*/
|
|
|
|
dwSpinCount = 100;
|
|
InitializeCriticalSectionEx(&critical, dwSpinCount, 0);
|
|
while(--dwSpinCount)
|
|
{
|
|
dwPreviousSpinCount = SetCriticalSectionSpinCount(&critical, dwSpinCount);
|
|
dwSpinCountExpected = 0;
|
|
#if !defined(WINPR_CRITICAL_SECTION_DISABLE_SPINCOUNT)
|
|
if (sysinfo.dwNumberOfProcessors > 1)
|
|
dwSpinCountExpected = dwSpinCount+1;
|
|
#endif
|
|
if (dwPreviousSpinCount != dwSpinCountExpected)
|
|
{
|
|
printf("CriticalSection failure: SetCriticalSectionSpinCount returned %u (expected: %u)\n", dwPreviousSpinCount, dwSpinCountExpected);
|
|
goto fail;
|
|
}
|
|
|
|
DeleteCriticalSection(&critical);
|
|
|
|
if (dwSpinCount%2==0)
|
|
InitializeCriticalSectionAndSpinCount(&critical, dwSpinCount);
|
|
else
|
|
InitializeCriticalSectionEx(&critical, dwSpinCount, 0);
|
|
}
|
|
DeleteCriticalSection(&critical);
|
|
|
|
|
|
/**
|
|
* Test single-threaded recursive TryEnterCriticalSection/EnterCriticalSection/LeaveCriticalSection
|
|
*
|
|
*/
|
|
|
|
InitializeCriticalSection(&critical);
|
|
|
|
for (i = 0; i < 1000; i++)
|
|
{
|
|
if (critical.RecursionCount != i)
|
|
{
|
|
printf("CriticalSection failure: RecursionCount field is %d instead of %d.\n", critical.RecursionCount, i);
|
|
goto fail;
|
|
}
|
|
if (i%2==0)
|
|
{
|
|
EnterCriticalSection(&critical);
|
|
}
|
|
else
|
|
{
|
|
if (TryEnterCriticalSection(&critical) == FALSE)
|
|
{
|
|
printf("CriticalSection failure: TryEnterCriticalSection failed where it should not.\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
if (critical.OwningThread != hMainThread)
|
|
{
|
|
printf("CriticalSection failure: Could not verify section ownership (loop index=%d).\n", i);
|
|
goto fail;
|
|
}
|
|
}
|
|
while (--i >= 0)
|
|
{
|
|
LeaveCriticalSection(&critical);
|
|
if (critical.RecursionCount != i)
|
|
{
|
|
printf("CriticalSection failure: RecursionCount field is %d instead of %d.\n", critical.RecursionCount, i);
|
|
goto fail;
|
|
}
|
|
if (critical.OwningThread != (HANDLE)(i ? hMainThread : NULL))
|
|
{
|
|
printf("CriticalSection failure: Could not verify section ownership (loop index=%d).\n", i);
|
|
goto fail;
|
|
}
|
|
}
|
|
DeleteCriticalSection(&critical);
|
|
|
|
|
|
/**
|
|
* Test using multiple threads modifying the same value
|
|
*/
|
|
|
|
dwThreadCount = sysinfo.dwNumberOfProcessors > 1 ? sysinfo.dwNumberOfProcessors : 2;
|
|
|
|
hThreads = (HANDLE*) calloc(dwThreadCount, sizeof(HANDLE));
|
|
|
|
for (j = 0; j < TEST_SYNC_CRITICAL_TEST1_RUNS; j++)
|
|
{
|
|
dwSpinCount = j * 1000;
|
|
InitializeCriticalSectionAndSpinCount(&critical, dwSpinCount);
|
|
|
|
gTestValueVulnerable = 0;
|
|
gTestValueSerialized = 0;
|
|
|
|
/* the TestSynchCritical_Test1 threads shall run until bTest1Running is FALSE */
|
|
bTest1Running = TRUE;
|
|
for (i = 0; i < (int) dwThreadCount; i++) {
|
|
hThreads[i] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) TestSynchCritical_Test1, &bTest1Running, 0, NULL);
|
|
}
|
|
|
|
/* let it run for TEST_SYNC_CRITICAL_TEST1_RUNTIME_MS ... */
|
|
Sleep(TEST_SYNC_CRITICAL_TEST1_RUNTIME_MS);
|
|
bTest1Running = FALSE;
|
|
|
|
for (i = 0; i < (int) dwThreadCount; i++)
|
|
{
|
|
if (WaitForSingleObject(hThreads[i], INFINITE) != WAIT_OBJECT_0)
|
|
{
|
|
printf("CriticalSection failure: Failed to wait for thread #%d\n", i);
|
|
goto fail;
|
|
}
|
|
GetExitCodeThread(hThreads[i], &dwThreadExitCode);
|
|
if(dwThreadExitCode != 0)
|
|
{
|
|
printf("CriticalSection failure: Thread #%d returned error code %u\n", i, dwThreadExitCode);
|
|
goto fail;
|
|
}
|
|
CloseHandle(hThreads[i]);
|
|
}
|
|
|
|
if (gTestValueVulnerable != gTestValueSerialized)
|
|
{
|
|
printf("CriticalSection failure: unexpected test value %d (expected %d)\n", gTestValueVulnerable, gTestValueSerialized);
|
|
goto fail;
|
|
}
|
|
|
|
DeleteCriticalSection(&critical);
|
|
}
|
|
|
|
free(hThreads);
|
|
|
|
|
|
/**
|
|
* TryEnterCriticalSection in thread must fail if we hold the lock in the main thread
|
|
*/
|
|
|
|
InitializeCriticalSection(&critical);
|
|
|
|
if (TryEnterCriticalSection(&critical) == FALSE)
|
|
{
|
|
printf("CriticalSection failure: TryEnterCriticalSection unexpectedly failed.\n");
|
|
goto fail;
|
|
}
|
|
/* This thread tries to call TryEnterCriticalSection which must fail */
|
|
hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) TestSynchCritical_Test2, NULL, 0, NULL);
|
|
if (WaitForSingleObject(hThread, INFINITE) != WAIT_OBJECT_0)
|
|
{
|
|
printf("CriticalSection failure: Failed to wait for thread\n");
|
|
goto fail;
|
|
}
|
|
GetExitCodeThread(hThread, &dwThreadExitCode);
|
|
if(dwThreadExitCode != 0)
|
|
{
|
|
printf("CriticalSection failure: Thread returned error code %u\n", dwThreadExitCode);
|
|
goto fail;
|
|
}
|
|
CloseHandle(hThread);
|
|
|
|
*pbThreadTerminated = TRUE; /* requ. for winpr issue, see below */
|
|
return (PVOID)0;
|
|
|
|
fail:
|
|
*pbThreadTerminated = TRUE; /* requ. for winpr issue, see below */
|
|
return (PVOID)1;
|
|
}
|
|
|
|
|
|
int TestSynchCritical(int argc, char* argv[])
|
|
{
|
|
BOOL bThreadTerminated = FALSE;
|
|
HANDLE hThread;
|
|
DWORD dwThreadExitCode;
|
|
DWORD dwDeadLockDetectionTimeMs;
|
|
DWORD i;
|
|
|
|
dwDeadLockDetectionTimeMs = 2 * TEST_SYNC_CRITICAL_TEST1_RUNTIME_MS * TEST_SYNC_CRITICAL_TEST1_RUNS;
|
|
|
|
printf("Deadlock will be assumed after %u ms.\n", dwDeadLockDetectionTimeMs);
|
|
|
|
hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) TestSynchCritical_Main, &bThreadTerminated, 0, NULL);
|
|
|
|
/**
|
|
* We have to be able to detect dead locks in this test.
|
|
* At the time of writing winpr's WaitForSingleObject has not implemented timeout for thread wait
|
|
*
|
|
* Workaround checking the value of bThreadTerminated which is passed in the thread arg
|
|
*/
|
|
|
|
for (i = 0; i < dwDeadLockDetectionTimeMs; i += 100)
|
|
{
|
|
if (bThreadTerminated)
|
|
break;
|
|
|
|
Sleep(100);
|
|
}
|
|
|
|
if (!bThreadTerminated)
|
|
{
|
|
printf("CriticalSection failure: Possible dead lock detected\n");
|
|
return -1;
|
|
}
|
|
|
|
GetExitCodeThread(hThread, &dwThreadExitCode);
|
|
CloseHandle(hThread);
|
|
|
|
if (dwThreadExitCode != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|