// Logs the entry according to Attribute and the thread condition.
EXTERN_C static NTSTATUS LogpPut(_In_ char *Message,
_In_ ULONG Attribute) {
auto status = STATUS_SUCCESS;
// Log the entry to a file or buffer.
auto &info = g_LogpLogBufferInfo;
if (LogpIsLogFileEnabled(info)) {
// Can it log it to a file now?
if (((Attribute & LOGP_LEVEL_OPT_SAFE) == 0) &&
KeGetCurrentIrql() == PASSIVE_LEVEL && !KeAreAllApcsDisabled()) {
// Yes, it can. Do it.
LogpWriteLogBufferToFile(&info);
status = LogpWriteMessageToFile(Message, info);
} else {
// No, it cannot. Buffer it.
status = LogpBufferMessage(Message, &info);
}
}
// Can it safely be printed?
if (KeGetCurrentIrql() >= CLOCK_LEVEL) {
return STATUS_UNSUCCESSFUL;
}
const auto cr = strlen(Message) - 2;
Message[cr] = '\n';
Message[cr + 1] = '\0';
DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "%s", Message);
return status;
}
EXTERN_C static VOID LogpBufferFlushThreadRoutine(_In_ void *StartContext) {
PAGED_CODE();
auto status = STATUS_SUCCESS;
auto info = reinterpret_cast<LogBufferInfo *>(StartContext);
LOG_DEBUG("Log thread started.");
NT_ASSERT(LogpIsLogFileEnabled(*info));
while (info->BufferFlushThreadShouldBeAlive) {
LogpSleep(LOGP_AUTO_FLUSH_INTERVAL_MSEC);
if (info->LogBufferHead[0]) {
NT_ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL);
NT_ASSERT(!KeAreAllApcsDisabled());
status = LogpWriteLogBufferToFile(info);
// Do not flush the file for overall performance. Even a case of
// bug check, we should be able to recover logs by looking at both
// log buffers.
}
}
LOG_DEBUG("Log thread is ending.");
PsTerminateSystemThread(status);
}
// Logs the entry according to attribute and the thread condition.
_Use_decl_annotations_ static NTSTATUS LogpPut(char *message, ULONG attribute) {
auto status = STATUS_SUCCESS;
auto do_DbgPrint = ((attribute & kLogpLevelOptSafe) == 0 &&
KeGetCurrentIrql() < CLOCK_LEVEL);
// Log the entry to a file or buffer.
auto &info = g_logp_log_buffer_info;
if (LogpIsLogFileEnabled(info)) {
// Can it log it to a file now?
if (((attribute & kLogpLevelOptSafe) == 0) &&
KeGetCurrentIrql() == PASSIVE_LEVEL && LogpIsLogFileActivated(info)) {
#pragma warning(push)
#pragma warning(disable : 28123)
if (!KeAreAllApcsDisabled()) {
// Yes, it can. Do it.
LogpFlushLogBuffer(&info);
status = LogpWriteMessageToFile(message, info);
}
#pragma warning(pop)
} else {
// No, it cannot. Set the prited bit if needed, and then buffer it.
if (do_DbgPrint) {
LogpSetPrintedBit(message, true);
}
status = LogpBufferMessage(message, &info);
LogpSetPrintedBit(message, false);
}
}
// Can it safely be printed?
if (do_DbgPrint) {
LogpDoDbgPrint(message);
}
return status;
}