Merge pull request llvm#125 from pcc/filc13

Stop asserting that threads are not created during deferred ctors

Author: pizlonator

filc/tests/concurrentloadstress3/gctor.c

@@ -0,0 +1,17 @@
+#include <stdfil.h>
+#include <unistd.h>
+#include <sched.h>
+#include <stdbool.h>
+
+static void foo(void) __attribute__((constructor));
+
+static void foo(void)
+{
+    zprintf("gctor: gonna sleep a bit.\n");
+    sched_yield();
+    zprintf("gctor: done.\n");
+}
+
+void bar(void)
+{
+}

filc/tests/concurrentloadstress3/generate-manifest.rb

@@ -0,0 +1,9 @@
+puts "libraries:"
+1000.times {
+    | index |
+    puts "  gctor#{index}.so:"
+    puts "    isBundle: true"
+    puts "    files:"
+    puts "      - gctor.c"
+}
+

filc/tests/concurrentloadstress3/loadgctor.c

@@ -0,0 +1,53 @@
+#include <stdfil.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#define N 1000
+
+static void do_stuff(const char* name, const char* so, const char* sym)
+{
+    zprintf("%s: loading %s\n", name, so);
+    void* lib = dlopen(so, RTLD_LAZY | RTLD_LOCAL);
+    zprintf("%s: lib = %p\n", name, lib);
+    if (!lib)
+        zprintf("%s: error: %s\n", name, dlerror());
+    zprintf("%s: dlsymming.\n", name);
+    void (*bar)(void) = dlsym(lib, sym);
+    zprintf("%s: %s = %p\n", name, sym, bar);
+    if (!bar)
+        zprintf("%s: error: %s\n", name, dlerror());
+    zprintf("%s: calling %s.\n", name, sym);
+    bar();
+}
+
+static void* thread_main(void* arg)
+{
+    unsigned i;
+    for (i = N / 2; i--;) {
+        do_stuff(
+            "thread",
+            zasprintf("filc/test-output/concurrentloadstress3/gctor%u.so", i + N / 2),
+            "bar");
+    }
+    return NULL;
+}
+
+int main()
+{
+    return 0;
+}
+
+__attribute__((constructor)) static void foo(void)
+{
+    pthread_t t;
+    pthread_create(&t, NULL, thread_main, NULL);
+
+    unsigned i;
+    for (i = N / 2; i--;)
+        do_stuff("main", zasprintf("filc/test-output/concurrentloadstress3/gctor%u.so", i), "bar");
+
+    pthread_join(t, NULL);
+}
+