Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-tcg-plugins-270520-1' into staging

Testing and one plugin fix:

  - support alternates for genisoimage to test/vm
  - add clang++ to clang tests
  - fix record/replay smoke test
  - enable more softfloat tests
  - better detection of hung gdb
  - upgrade aarch64 tcg test x-compile to gcc-10
  - fix plugin cpu_index clash vs threads

# gpg: Signature made Wed 27 May 2020 14:29:20 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-tcg-plugins-270520-1:
  tests/tcg: add new threadcount test
  linux-user: properly "unrealize" vCPU object
  cpus-common: ensure auto-assigned cpu_indexes don't clash
  tests/docker: use a gcc-10 based image for arm64 tests
  tests/docker: add debian11 base image
  tests/tcg: better detect confused gdb which can't connect
  tests/fp: split and audit the conversion tests
  tests/fp: enable extf80_le_quite tests
  tests/tcg: fix invocation of the memory record/replay tests
  travis.yml: Use clang++ in the Clang tests
  tests/vm: pass --genisoimage to basevm script
  configure: add alternate binary for genisoimage

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

1 files changed, 64 insertions, 0 deletions

diff --git a/tests/tcg/multiarch/threadcount.c b/tests/tcg/multiarch/threadcount.c
new file mode 100644
index 0000000000..545a1c8146
--- /dev/null
+++ b/tests/tcg/multiarch/threadcount.c
@@ -0,0 +1,64 @@
+/*
+ * Thread Exerciser
+ *
+ * Unlike testthread which is mainly concerned about testing thread
+ * semantics this test is used to exercise the thread creation and
+ * accounting. A version of this test found a problem with clashing
+ * cpu_indexes which caused a break in plugin handling.
+ *
+ * Based on the original test case by Nikolay Igotti.
+ *
+ * Copyright (c) 2020 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+
+int max_threads = 10;
+
+typedef struct {
+    int delay;
+} ThreadArg;
+
+static void *thread_fn(void* varg)
+{
+    ThreadArg *arg = varg;
+    usleep(arg->delay);
+    free(arg);
+    return NULL;
+}
+
+int main(int argc, char **argv)
+{
+    int i;
+    pthread_t *threads;
+
+    if (argc > 1) {
+        max_threads = atoi(argv[1]);
+    }
+    threads = calloc(sizeof(pthread_t), max_threads);
+
+    for (i = 0; i < max_threads; i++) {
+        ThreadArg *arg = calloc(sizeof(ThreadArg), 1);
+        arg->delay = i * 100;
+        pthread_create(threads + i, NULL, thread_fn, arg);
+    }
+
+    printf("Created %d threads\n", max_threads);
+
+    /* sleep until roughly half the threads have "finished" */
+    usleep(max_threads * 50);
+
+    for (i = 0; i < max_threads; i++) {
+        pthread_join(threads[i], NULL);
+    }
+
+    printf("Done\n");
+
+    return 0;
+}