Stub out SYS_rt_sigqueueinfo syscall

Author: jgravelle-google

src/library_syscall.js

@@ -839,6 +839,12 @@ var SyscallsLibrary = {
     }
     return nonzero;
   },
+  __syscall178: function(which, varargs) { // rt_sigqueueinfo
+#if SYSCALL_DEBUG
+    Module.printErr('warning: ignoring SYS_rt_sigqueueinfo');
+#endif
+    return 0;
+  },
   __syscall180: function(which, varargs) { // pread64
     var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get(), count = SYSCALLS.get(), zero = SYSCALLS.getZero(), offset = SYSCALLS.get64();
     return FS.read(stream, {{{ heapAndOffset('HEAP8', 'buf') }}}, count, offset);

system/lib/libc/musl/arch/emscripten/syscall_arch.h

@@ -88,6 +88,7 @@ long __syscall152(int which, ...);
 long __syscall153(int which, ...);
 long __syscall163(int which, ...);
 long __syscall168(int which, ...);
+long __syscall178(int which, ...);
 long __syscall180(int which, ...);
 long __syscall181(int which, ...);
 long __syscall183(int which, ...);

system/lib/libc/musl/src/aio/aio.c

@@ -176,9 +176,7 @@ static void cleanup(void *ctx)
 			.si_pid = getpid(),
 			.si_uid = getuid()
 		};
-#ifndef __EMSCRIPTEN__
 		__syscall(SYS_rt_sigqueueinfo, si.si_pid, si.si_signo, &si);
-#endif
 	}
 	if (sev.sigev_notify == SIGEV_THREAD) {
 		a_store(&__pthread_self()->cancel, 0);

system/lib/libc/musl/src/aio/aio_readwrite.c

@@ -20,9 +20,7 @@ static void notify_signal(struct sigevent *sev)
 		.si_pid = __pthread_self()->pid,
 		.si_uid = getuid()
 	};
-#ifndef __EMSCRIPTEN__
 	__syscall(SYS_rt_sigqueueinfo, si.si_pid, si.si_signo, &si);
-#endif
 }
 
 static void *io_thread(void *p)