test: cover printLong and bytesEqual

user/eintrtest.c

@@ -0,0 +1,71 @@
+#include "ulib.h"
+
+/*
+ * Boot-time driver for early-wake signal delivery (signal.h/sched.c's
+ * threadWakeForSignal): spawns eintrtarget.c, waits for a real
+ * happens-before confirmation that it is about to block forever on a read
+ * that no writer will ever satisfy (the same unsatisfiable-by-construction
+ * setup killtest.c's killvictim.c already established for threadKill), and
+ * sends it a real sigTerm through userSigSend -- an ORDINARY signal with
+ * its real default disposition (Terminate), not threadKill's direct
+ * bypass.
+ *
+ * If userWait below ever hung the whole boot (see ci-test.sh's 25s QEMU
+ * timeout), that would itself BE the regression this proves against: a
+ * Blocked thread that never naturally wakes has no other way back to ring 3
+ * for isr.c's deliverPendingSignals to ever reach it, without the
+ * early-wake this test exists to exercise.
+ */
+
+int main(void)
+{
+    print("eintrtest: start, pid=");
+    printDec(userGetpid());
+    print("\n");
+
+    long readyHandle = userPipeCreate();
+    if (readyHandle < 0) {
+        print("eintrtest: FAIL create ready pipe\n");
+        return 1;
+    }
+    long readyFd = userPipeAttach(readyHandle, 0);
+    if (readyFd < 0) {
+        print("eintrtest: FAIL attach ready pipe\n");
+        return 1;
+    }
+
+    char readyHandleStr[24];
+    decToString(readyHandle, readyHandleStr);
+    char* targetArgv[] = { "/bin/eintrtarget", readyHandleStr, 0 };
+    long target = userSpawn("/bin/eintrtarget", targetArgv);
+    if (target < 0) {
+        print("eintrtest: FAIL spawn eintrtarget\n");
+        return 1;
+    }
+
+    char readyByte;
+    if (userRead((int)readyFd, &readyByte, 1) != 1) {
+        print("eintrtest: FAIL read ready byte\n");
+        return 1;
+    }
+    userClose((int)readyFd);
+    print("eintrtest: eintrtarget ready\n");
+
+    if (userSigSend(target, sigTerm) != 0) {
+        print("eintrtest: FAIL send sigTerm to eintrtarget\n");
+        return 1;
+    }
+    print("eintrtest: sent sigTerm to eintrtarget\n");
+
+    long status = userWait(target);
+    print("eintrtest: eintrtarget exit status=");
+    printDec(status);
+    print("\n");
+    if (status != 128 + sigTerm) {
+        print("eintrtest: FAIL expected eintrtarget exit status 128+sigTerm\n");
+        return 1;
+    }
+    print("eintrtest: early-wake-signal-ok\n");
+
+    return 0;
+}