Add a testcase for #12243 #12244 #12245 [ci skip]

Author: kripken

tests/pthread/test_pthread_proxy_hammer.cpp

@@ -0,0 +1,71 @@
+#include <errno.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <emscripten.h>
+#include <stdio.h>
+
+class random_device
+{
+    int __f_;
+public:
+    // constructors
+    explicit random_device();
+    ~random_device();
+
+    // generating functions
+    unsigned operator()();
+};
+
+random_device::random_device()
+    : __f_(open("/dev/urandom", O_RDONLY))
+{
+    if (__f_ < 0) abort();
+}
+
+random_device::~random_device()
+{
+    close(__f_);
+}
+
+unsigned
+random_device::operator()()
+{
+    unsigned r;
+    size_t n = sizeof(r);
+    char* p = reinterpret_cast<char*>(&r);
+    while (n > 0)
+    {
+        ssize_t s = read(__f_, p, 1);
+        if (s == 0) abort();
+        if (s == -1)
+        {
+            if (errno != EINTR) abort();
+            continue;
+        }
+        n -= static_cast<size_t>(s);
+        p += static_cast<size_t>(s);
+    }
+    return r;
+}
+
+void* ptr;
+
+int main() {
+  int total = 0;
+  for (int i = 0; i < 128; i++) {
+    EM_ASM({ out($0, $1) }, i, total);
+    for (int j = 0; j < 128; j++) {
+      auto* rd = new random_device;
+      total += (*rd)();
+      ptr = (void*)rd; // make sure the optimizer doesn't remove the allocation
+      delete rd;
+    }
+  }
+  EM_ASM({ out("done") });
+#ifdef REPORT_RESULT
+	REPORT_RESULT(0);
+#endif
+  return 0;
+}
+

tests/test_browser.py

@@ -4509,6 +4509,10 @@ def run(emcc_args=[]):
   def test_pthread_reltime(self):
     self.btest(path_from_root('tests', 'pthread', 'test_pthread_reltime.cpp'), expected='3', args=['-s', 'USE_PTHREADS=1', '-s', 'PTHREAD_POOL_SIZE=1'])
 
+  @requires_threads
+  def test_pthread_proxy_hammer(self):
+    self.btest(path_from_root('tests', 'pthread', 'test_pthread_proxy_hammer.cpp'), expected='0', args=['-s', 'USE_PTHREADS=1', '-O2', '-s', 'PROXY_TO_PTHREAD'])
+
   # Tests that it is possible to load the main .js file of the application manually via a Blob URL, and still use pthreads.
   @requires_threads
   @no_wasm_backend("WASM2JS does not yet support pthreads")