summaryrefslogtreecommitdiff
path: root/src/pal/src/exception/signal.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/pal/src/exception/signal.cpp')
-rw-r--r--src/pal/src/exception/signal.cpp280
1 files changed, 0 insertions, 280 deletions
diff --git a/src/pal/src/exception/signal.cpp b/src/pal/src/exception/signal.cpp
index 7f48fc8384..69519d4a87 100644
--- a/src/pal/src/exception/signal.cpp
+++ b/src/pal/src/exception/signal.cpp
@@ -65,8 +65,6 @@ static void sigfpe_handler(int code, siginfo_t *siginfo, void *context);
static void sigsegv_handler(int code, siginfo_t *siginfo, void *context);
static void sigtrap_handler(int code, siginfo_t *siginfo, void *context);
static void sigbus_handler(int code, siginfo_t *siginfo, void *context);
-static void sigint_handler(int code, siginfo_t *siginfo, void *context);
-static void sigquit_handler(int code, siginfo_t *siginfo, void *context);
static void common_signal_handler(PEXCEPTION_POINTERS pointers, int code,
native_context_t *ucontext);
@@ -83,15 +81,6 @@ struct sigaction g_previous_sigtrap;
struct sigaction g_previous_sigfpe;
struct sigaction g_previous_sigbus;
struct sigaction g_previous_sigsegv;
-struct sigaction g_previous_sigint;
-struct sigaction g_previous_sigquit;
-
-// Pipe used for sending SIGINT / SIGQUIT signals notifications to a helper thread
-// that invokes the actual handler.
-int g_signalPipe[2] = { 0, 0 };
-
-DWORD g_dwExternalSignalHandlerThreadId = 0;
-
/* public function definitions ************************************************/
@@ -173,14 +162,6 @@ void SEHCleanupSignals()
restore_signal(SIGFPE, &g_previous_sigfpe);
restore_signal(SIGBUS, &g_previous_sigbus);
restore_signal(SIGSEGV, &g_previous_sigsegv);
-
- // Only restore these signals if the signal handler thread was started and
- // the previous handlers saved.
- if (g_dwExternalSignalHandlerThreadId != 0)
- {
- restore_signal(SIGINT, &g_previous_sigint);
- restore_signal(SIGQUIT, &g_previous_sigquit);
- }
}
/* internal function definitions **********************************************/
@@ -376,91 +357,6 @@ static void sigtrap_handler(int code, siginfo_t *siginfo, void *context)
/*++
Function :
- HandleExternalSignal
-
- Handle the SIGINT and SIGQUIT signals.
-
-
-Parameters :
- signalCode - code of the external signal
-
- (no return value)
---*/
-static void HandleExternalSignal(int signalCode)
-{
- BYTE signalCodeByte = (BYTE)signalCode;
- ssize_t writtenBytes;
- do
- {
- writtenBytes = write(g_signalPipe[1], &signalCodeByte, 1);
- }
- while ((writtenBytes == -1) && (errno == EINTR));
-
- if (writtenBytes == -1)
- {
- // Fatal error
- abort();
- }
-}
-
-/*++
-Function :
- sigint_handler
-
- handle SIGINT signal
-
-Parameters :
- POSIX signal handler parameter list ("man sigaction" for details)
-
- (no return value)
---*/
-static void sigint_handler(int code, siginfo_t *siginfo, void *context)
-{
- if (PALIsInitialized())
- {
- HandleExternalSignal(code);
- }
- else
- {
- TRACE("SIGINT signal was unhandled; chaining to previous sigaction\n");
-
- if (g_previous_sigint.sa_sigaction != NULL)
- {
- g_previous_sigint.sa_sigaction(code, siginfo, context);
- }
- }
-}
-
-/*++
-Function :
- sigquit_handler
-
- handle SIGQUIT signal
-
-Parameters :
- POSIX signal handler parameter list ("man sigaction" for details)
-
- (no return value)
---*/
-static void sigquit_handler(int code, siginfo_t *siginfo, void *context)
-{
- if (PALIsInitialized())
- {
- HandleExternalSignal(code);
- }
- else
- {
- TRACE("SIGQUIT signal was unhandled; chaining to previous sigaction\n");
-
- if (g_previous_sigquit.sa_sigaction != NULL)
- {
- g_previous_sigquit.sa_sigaction(code, siginfo, context);
- }
- }
-}
-
-/*++
-Function :
sigbus_handler
handle SIGBUS signal (EXCEPTION_ACCESS_VIOLATION?)
@@ -723,180 +619,4 @@ void restore_signal(int signal_id, struct sigaction *previousAction)
}
}
-static
-DWORD
-PALAPI
-ExternalSignalHandlerThreadRoutine(
- PVOID
- );
-
-static
-DWORD
-PALAPI
-ControlHandlerThreadRoutine(
- PVOID pvSignal
- );
-
-PAL_ERROR
-StartExternalSignalHandlerThread(
- CPalThread *pthr)
-{
- PAL_ERROR palError = NO_ERROR;
-
-#ifndef DO_NOT_USE_SIGNAL_HANDLING_THREAD
- HANDLE hThread;
-
- if (pipe(g_signalPipe) != 0)
- {
- palError = ERROR_CANNOT_MAKE;
- goto done;
- }
-
- palError = InternalCreateThread(
- pthr,
- NULL,
- 0,
- ExternalSignalHandlerThreadRoutine,
- NULL,
- 0,
- SignalHandlerThread, // Want no_suspend variant
- &g_dwExternalSignalHandlerThreadId,
- &hThread
- );
-
- if (NO_ERROR != palError)
- {
- ERROR("Failure creating external signal handler thread (%d)\n", palError);
- goto done;
- }
-
- InternalCloseHandle(pthr, hThread);
-
- handle_signal(SIGINT, sigint_handler, &g_previous_sigint);
- handle_signal(SIGQUIT, sigquit_handler, &g_previous_sigquit);
-#endif // DO_NOT_USE_SIGNAL_HANDLING_THREAD
-
-done:
-
- return palError;
-}
-
-static
-DWORD
-PALAPI
-ExternalSignalHandlerThreadRoutine(
- PVOID
- )
-{
- DWORD dwThreadId;
- bool fContinue = TRUE;
- HANDLE hThread;
- PAL_ERROR palError = NO_ERROR;
- CPalThread *pthr = InternalGetCurrentThread();
-
- //
- // Wait for a signal to occur
- //
-
- while (fContinue)
- {
- BYTE signalCode;
- ssize_t bytesRead;
-
- do
- {
- bytesRead = read(g_signalPipe[0], &signalCode, 1);
- }
- while ((bytesRead == -1) && (errno == EINTR));
-
- if (bytesRead == -1)
- {
- // Fatal error
- abort();
- }
-
- switch (signalCode)
- {
- case SIGINT:
- case SIGQUIT:
- {
- //
- // Spin up a new thread to run the console handlers. We want
- // to do this even if no handlers are installed, as in that
- // case we want to do a normal shutdown from the new thread
- // while still having this thread available to handle any
- // other incoming signals.
- //
- // The new thread is always spawned, even if there are already
- // currently console handlers running; this follows the
- // Windows behavior. Yes, this means that poorly written
- // console handler routines can make it impossible to kill
- // a process using Ctrl-C or Ctrl-Break. "kill -9" is
- // your friend.
- //
- // This thread must not be marked as a PalWorkerThread --
- // since it may run user code it needs to make
- // DLL_THREAD_ATTACH notifications.
- //
-
- PVOID pvCtrlCode = UintToPtr(
- SIGINT == signalCode ? CTRL_C_EVENT : CTRL_BREAK_EVENT
- );
-
- palError = InternalCreateThread(
- pthr,
- NULL,
- 0,
- ControlHandlerThreadRoutine,
- pvCtrlCode,
- 0,
- UserCreatedThread,
- &dwThreadId,
- &hThread
- );
-
- if (NO_ERROR != palError)
- {
- if (!PALIsShuttingDown())
- {
- // If PAL is not shutting down, failure to create a thread is
- // a fatal error.
- abort();
- }
- fContinue = FALSE;
- break;
- }
-
- InternalCloseHandle(pthr, hThread);
- break;
- }
-
- default:
- ASSERT("Unexpected signal %d in signal thread\n", signalCode);
- abort();
- break;
- }
- }
-
- //
- // Perform an immediate (non-graceful) shutdown
- //
-
- _exit(EXIT_FAILURE);
-
- return 0;
-}
-
-static
-DWORD
-PALAPI
-ControlHandlerThreadRoutine(
- PVOID pvSignal
- )
-{
- // Uint and DWORD are implicitly the same.
- SEHHandleControlEvent(PtrToUint(pvSignal), NULL);
- return 0;
-}
-
#endif // !HAVE_MACH_EXCEPTIONS
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-11 15:56:16 +0000