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sys: DEBUGRANDTEST()

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This commit is contained in:
Bill Zissimopoulos 2016-01-27 15:26:44 -08:00
parent f491d6015f
commit dde82a1081
3 changed files with 28 additions and 2 deletions
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2
src/sys/create.c
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@ -690,7 +690,7 @@ static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Re
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
BOOLEAN Success;
Success = FspFileNodeTryAcquireExclusive(FileNode, Both);
Success = DEBUGRANDTEST(90, TRUE) && FspFileNodeTryAcquireExclusive(FileNode, Both);
if (!Success)
{
/* repost the IRP to retry later */

18
src/sys/debug.c
View File

@ -261,4 +261,22 @@ const char *FsInformationClassSym(FS_INFORMATION_CLASS FsInformationClass)
return "FS_INFORMATION_CLASS:Unknown";
}
}
ULONG DebugRandom(VOID)
{
static KSPIN_LOCK SpinLock = 0;
static ULONG Seed = 1;
KIRQL Irql;
ULONG Result;
KeAcquireSpinLock(&SpinLock, &Irql);
/* see ucrt sources */
Seed = Seed * 214013 + 2531011;
Result = (Seed >> 16) & 0x7fff;
KeReleaseSpinLock(&SpinLock, Irql);
return Result;
}
#endif

8
src/sys/driver.h
View File

@ -64,6 +64,13 @@ extern __declspec(selectany) int fsp_bp = 1;
#define DEBUGBREAK() do {} while (0,0)
#endif
/* DEBUGRANDTEST */
#if DBG
#define DEBUGRANDTEST(Percent, Default) (DebugRandom() <= (Percent) * 0x7fff / 100 ? (Default) : !(Default))
#else
#define DEBUGRANDTEST(Percent, Default) (Default)
#endif
/* FSP_ENTER/FSP_LEAVE */
#if DBG
#define FSP_DEBUGLOG_(fmt, rfmt, ...) \
@ -632,6 +639,7 @@ const char *IrpMinorFunctionSym(UCHAR MajorFunction, UCHAR MinorFunction);
const char *IoctlCodeSym(ULONG ControlCode);
const char *FileInformationClassSym(FILE_INFORMATION_CLASS FileInformationClass);
const char *FsInformationClassSym(FS_INFORMATION_CLASS FsInformationClass);
ULONG DebugRandom(VOID);
static inline
VOID FspDebugLogIrp(const char *func, PIRP Irp, NTSTATUS Result)
{