Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-updates-070621-2' into staging

A few testing and configure updates:

  - add the multiarch signals stress test
  - fix display of multi-word compiler stanzas in meson
  - fix quoting of multi-word compiler stazas in configure.sh
  - tag some acceptance tests as TCG only
  - make checkpatch test work harder to find clean diffs
  - split gprof/gconv job to avoid timeouts
  - fix centos8 VM build by adding --source-path
  - make checkpatch aware of .h.inc and .c.inc paths

# gpg: Signature made Mon 07 Jun 2021 14:51:12 BST
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-testing-updates-070621-2:
  scripts/checkpatch.pl: process .c.inc and .h.inc files as C source
  tests/vm: expose --source-path to scripts to find extra files
  gitlab-ci: Split gprof-gcov job
  gitlab: work harder to avoid false positives in checkpatch
  tests/acceptance: tag various arm tests as TCG only
  tests/tcg/configure.sh: tweak quoting of target_compiler
  meson.build: fix cosmetics of compiler display
  tests/tcg: add a multiarch signals test to stress test signal delivery

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 149 insertions, 0 deletions

diff --git a/tests/tcg/multiarch/signals.c b/tests/tcg/multiarch/signals.c
new file mode 100644
index 0000000000..998c8fdefd
--- /dev/null
+++ b/tests/tcg/multiarch/signals.c
@@ -0,0 +1,149 @@
+/*
+ * linux-user signal handling tests.
+ *
+ * Copyright (c) 2021 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <pthread.h>
+#include <string.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+
+static void error1(const char *filename, int line, const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    fprintf(stderr, "%s:%d: ", filename, line);
+    vfprintf(stderr, fmt, ap);
+    fprintf(stderr, "\n");
+    va_end(ap);
+    exit(1);
+}
+
+static int __chk_error(const char *filename, int line, int ret)
+{
+    if (ret < 0) {
+        error1(filename, line, "%m (ret=%d, errno=%d/%s)",
+               ret, errno, strerror(errno));
+    }
+    return ret;
+}
+
+#define error(fmt, ...) error1(__FILE__, __LINE__, fmt, ## __VA_ARGS__)
+
+#define chk_error(ret) __chk_error(__FILE__, __LINE__, (ret))
+
+/*
+ * Thread handling
+ */
+typedef struct ThreadJob ThreadJob;
+
+struct ThreadJob {
+    int number;
+    int sleep;
+    int count;
+};
+
+static pthread_t *threads;
+static int max_threads = 10;
+__thread int signal_count;
+int total_signal_count;
+
+static void *background_thread_func(void *arg)
+{
+    ThreadJob *job = (ThreadJob *) arg;
+
+    printf("thread%d: started\n", job->number);
+    while (total_signal_count < job->count) {
+        usleep(job->sleep);
+    }
+    printf("thread%d: saw %d alarms from %d\n", job->number,
+           signal_count, total_signal_count);
+    return NULL;
+}
+
+static void spawn_threads(void)
+{
+    int i;
+    threads = calloc(sizeof(pthread_t), max_threads);
+
+    for (i = 0; i < max_threads; i++) {
+        ThreadJob *job = calloc(sizeof(ThreadJob), 1);
+        job->number = i;
+        job->sleep = i * 1000;
+        job->count = i * 100;
+        pthread_create(threads + i, NULL, background_thread_func, job);
+    }
+}
+
+static void close_threads(void)
+{
+    int i;
+    for (i = 0; i < max_threads; i++) {
+        pthread_join(threads[i], NULL);
+    }
+    free(threads);
+    threads = NULL;
+}
+
+static void sig_alarm(int sig, siginfo_t *info, void *puc)
+{
+    if (sig != SIGRTMIN) {
+        error("unexpected signal");
+    }
+    signal_count++;
+    __atomic_fetch_add(&total_signal_count, 1, __ATOMIC_SEQ_CST);
+}
+
+static void test_signals(void)
+{
+    struct sigaction act;
+    struct itimerspec it;
+    timer_t tid;
+    struct sigevent sev;
+
+    /* Set up SIG handler */
+    act.sa_sigaction = sig_alarm;
+    sigemptyset(&act.sa_mask);
+    act.sa_flags = SA_SIGINFO;
+    chk_error(sigaction(SIGRTMIN, &act, NULL));
+
+    /* Create POSIX timer */
+    sev.sigev_notify = SIGEV_SIGNAL;
+    sev.sigev_signo = SIGRTMIN;
+    sev.sigev_value.sival_ptr = &tid;
+    chk_error(timer_create(CLOCK_REALTIME, &sev, &tid));
+
+    it.it_interval.tv_sec = 0;
+    it.it_interval.tv_nsec = 1000000;
+    it.it_value.tv_sec = 0;
+    it.it_value.tv_nsec = 1000000;
+    chk_error(timer_settime(tid, 0, &it, NULL));
+
+    spawn_threads();
+
+    do {
+        usleep(1000);
+    } while (total_signal_count < 2000);
+
+    printf("shutting down after: %d signals\n", total_signal_count);
+
+    close_threads();
+
+    chk_error(timer_delete(tid));
+}
+
+int main(int argc, char **argv)
+{
+    test_signals();
+    return 0;
+}