void VMPI_spyCallback()
{
if(mmgc_spy_signal)
{
VMPI_lockAcquire(&lock);
if(mmgc_spy_signal)
{
mmgc_spy_signal = 0;
void *pipe = OpenAndConnectToNamedPipe("MMgc_Spy");
spyStream = HandleToStream(pipe);
GCAssert(spyStream != NULL);
RedirectLogOutput(SpyLog);
MMgc::GCHeap::GetGCHeap()->DumpMemoryInfo();
fflush(spyStream);
CloseNamedPipe(pipe);
RedirectLogOutput(NULL);
spyStream = NULL;
}
VMPI_lockRelease(&lock);
}
}
void RunDaemonMode(int argc, const char **argv)
{
if (argc < 2 || argc > 3) {
daemonUsage();
}
printf("SNAP in daemon mode, waiting for commands to execute\n");
const char *pipeName = argc == 3 ? argv[2] : DEFAULT_NAMED_PIPE_NAME;
CommandPipe = OpenNamedPipe(pipeName, true);
if (NULL == CommandPipe) {
WriteErrorMessage("Unable to open named pipe for command IO.\n");
soft_exit(1);
}
const size_t commandBufferSize = 10000; // Yes, this is fixed size, no it's not a buffer overflow. The named pipe reader just quits if it's too long.
char commandBuffer[commandBufferSize];
//
// Format of commands is argc (in ascii) followed by argc arguments, each in one line.
//
for (;;) {
if (!ReadFromNamedPipe(CommandPipe, commandBuffer, commandBufferSize)) {
CloseNamedPipe(CommandPipe);
CommandPipe = NULL;
WriteStatusMessage("Named pipe closed. Exiting\n");
soft_exit_no_print(0);
}
int argc = atoi(commandBuffer);
if (0 == argc) {
WriteErrorMessage("Expected argument count on named pipe, got '%s'; ignoring.\n", commandBuffer);
} else {
char **argv = new char*[argc];
for (int i = 0; i < argc; i++) {
argv[i] = new char[commandBufferSize];
if (!ReadFromNamedPipe(CommandPipe, argv[i], commandBufferSize)) {
CloseNamedPipe(CommandPipe);
CommandPipe = NULL;
WriteStatusMessage("Error reading argument #%d from named pipe.\n", i);
soft_exit(1);
}
} // for each arg
if (argc > 1 && strcmp(argv[1], "exit") == 0) {
WriteStatusMessage("SNAP server exiting by request\n");
WriteToNamedPipe(CommandPipe, CommandExecutedString);
soft_exit_no_print(1);
}
printf("Executing command: ");
for (int i = 1; i < argc; i++) {
printf("%s ", argv[i]);
}
printf("\n");
ProcessNonDaemonCommands(argc, (const char **) argv);
printf("\n");
for (int i = 0; i < argc; i++) {
delete[] argv[i];
argv[i] = NULL;
}
delete[] argv;
argv = NULL;
}
WriteToNamedPipe(CommandPipe, CommandExecutedString);
}
}