8268773: Improvements related to: Failed to start thread - pthread_create failed (EAGAIN)

Reviewed-by: stuefe, iklam

src/hotspot/os/aix/os_aix.cpp

@@ -814,19 +814,24 @@ bool os::create_thread(Thread* thread, ThreadType thr_type,
     ret = pthread_attr_setguardsize(&attr, 0);
   }
 
+  ResourceMark rm;
   pthread_t tid = 0;
+
   if (ret == 0) {
+    int limit = 3;
+    do {
       ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
+    } while (ret == EAGAIN && limit-- > 0);
   }
 
   if (ret == 0) {
     char buf[64];
-    log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
+    log_info(os, thread)("Thread \"%s\" started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
-      (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                         thread->name(), (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
   } else {
     char buf[64];
-    log_warning(os, thread)("Failed to start thread - pthread_create failed (%d=%s) for attributes: %s.",
+    log_warning(os, thread)("Failed to start thread \"%s\" - pthread_create failed (%d=%s) for attributes: %s.",
-      ret, os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                            thread->name(), ret, os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
     // Log some OS information which might explain why creating the thread failed.
     log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
     LogStream st(Log(os, thread)::info());

src/hotspot/os/bsd/os_bsd.cpp

@@ -631,16 +631,22 @@ bool os::create_thread(Thread* thread, ThreadType thr_type,
   ThreadState state;
 
   {
+
+    ResourceMark rm;
     pthread_t tid;
-    int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
+    int ret = 0;
+    int limit = 3;
+    do {
+      ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
+    } while (ret == EAGAIN && limit-- > 0);
 
     char buf[64];
     if (ret == 0) {
-      log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
+      log_info(os, thread)("Thread \"%s\" started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
-        (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                           thread->name(), (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
     } else {
-      log_warning(os, thread)("Failed to start thread - pthread_create failed (%s) for attributes: %s.",
+      log_warning(os, thread)("Failed to start thread \"%s\" - pthread_create failed (%s) for attributes: %s.",
-        os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                              thread->name(), os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
       // Log some OS information which might explain why creating the thread failed.
       log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
       LogStream st(Log(os, thread)::info());

src/hotspot/os/linux/os_linux.cpp

@@ -863,16 +863,21 @@ bool os::create_thread(Thread* thread, ThreadType thr_type,
   ThreadState state;
 
   {
+    ResourceMark rm;
     pthread_t tid;
-    int ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
+    int ret = 0;
+    int limit = 3;
+    do {
+      ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread);
+    } while (ret == EAGAIN && limit-- > 0);
 
     char buf[64];
     if (ret == 0) {
-      log_info(os, thread)("Thread started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
+      log_info(os, thread)("Thread \"%s\" started (pthread id: " UINTX_FORMAT ", attributes: %s). ",
-        (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                           thread->name(), (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
     } else {
-      log_warning(os, thread)("Failed to start thread - pthread_create failed (%s) for attributes: %s.",
+      log_warning(os, thread)("Failed to start thread \"%s\" - pthread_create failed (%s) for attributes: %s.",
-        os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+                              thread->name(), os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
       // Log some OS information which might explain why creating the thread failed.
       log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
       LogStream st(Log(os, thread)::info());

src/hotspot/os/windows/os_windows.cpp

@@ -743,21 +743,27 @@ bool os::create_thread(Thread* thread, ThreadType thr_type,
   // flag appears to work with _beginthredex() as well.
 
   const unsigned initflag = CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION;
-  HANDLE thread_handle =
+  HANDLE thread_handle;
+  int limit = 3;
+  do {
+    thread_handle =
       (HANDLE)_beginthreadex(NULL,
                              (unsigned)stack_size,
                              (unsigned (__stdcall *)(void*)) thread_native_entry,
                              thread,
                              initflag,
                              &thread_id);
+  } while (thread_handle == NULL && errno == EAGAIN && limit-- > 0);
 
+  ResourceMark rm;
   char buf[64];
   if (thread_handle != NULL) {
-    log_info(os, thread)("Thread started (tid: %u, attributes: %s)",
+    log_info(os, thread)("Thread \"%s\" started (tid: %u, attributes: %s)",
-      thread_id, describe_beginthreadex_attributes(buf, sizeof(buf), stack_size, initflag));
+                         thread->name(), thread_id,
+                         describe_beginthreadex_attributes(buf, sizeof(buf), stack_size, initflag));
   } else {
-    log_warning(os, thread)("Failed to start thread - _beginthreadex failed (%s) for attributes: %s.",
+    log_warning(os, thread)("Failed to start thread \"%s\" - _beginthreadex failed (%s) for attributes: %s.",
-      os::errno_name(errno), describe_beginthreadex_attributes(buf, sizeof(buf), stack_size, initflag));
+                            thread->name(), os::errno_name(errno), describe_beginthreadex_attributes(buf, sizeof(buf), stack_size, initflag));
     // Log some OS information which might explain why creating the thread failed.
     log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
     LogStream st(Log(os, thread)::info());

src/hotspot/share/prims/jvm.cpp

@@ -2909,6 +2909,9 @@ JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
   assert(native_thread != NULL, "Starting null thread?");
 
   if (native_thread->osthread() == NULL) {
+    ResourceMark rm(thread);
+    log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
+                            JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
     // No one should hold a reference to the 'native_thread'.
     native_thread->smr_delete();
     if (JvmtiExport::should_post_resource_exhausted()) {

src/hotspot/share/runtime/thread.cpp

@@ -446,6 +446,13 @@ bool Thread::is_JavaThread_protected(const JavaThread* p) {
     return true;
   }
 
+  // If the target hasn't been started yet then it is trivially
+  // "protected". We assume the caller is the thread that will do
+  // the starting.
+  if (p->osthread() == NULL || p->osthread()->get_state() <= INITIALIZED) {
+    return true;
+  }
+
   // Now make the simple checks based on who the caller is:
   Thread* current_thread = Thread::current();
   if (current_thread == p || Threads_lock->owner() == current_thread) {
@@ -2146,7 +2153,7 @@ const char* JavaThread::name() const  {
 }
 
 // Returns a non-NULL representation of this thread's name, or a suitable
-// descriptive string if there is no set name
+// descriptive string if there is no set name.
 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const {
   const char* name_str;
   oop thread_obj = threadObj();
@@ -2170,6 +2177,19 @@ const char* JavaThread::get_thread_name_string(char* buf, int buflen) const {
   return name_str;
 }
 
+// Helper to extract the name from the thread oop for logging.
+const char* JavaThread::name_for(oop thread_obj) {
+  assert(thread_obj != NULL, "precondition");
+  oop name = java_lang_Thread::name(thread_obj);
+  const char* name_str;
+  if (name != NULL) {
+    name_str = java_lang_String::as_utf8_string(name);
+  } else {
+    name_str = "<un-named>";
+  }
+  return name_str;
+}
+
 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) {
 
   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");

src/hotspot/share/runtime/thread.hpp

@@ -1379,6 +1379,7 @@ class JavaThread: public Thread {
   // Misc. operations
   const char* name() const;
   const char* type_name() const { return "JavaThread"; }
+  static const char* name_for(oop thread_obj);
 
   void print_on(outputStream* st, bool print_extended_info) const;
   void print_on(outputStream* st) const { print_on(st, false); }

test/hotspot/jtreg/runtime/logging/ThreadLoggingTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2016 SAP SE and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -41,7 +41,7 @@ import jdk.test.lib.process.ProcessTools;
 public class ThreadLoggingTest {
 
     static void analyzeOutputForInfoLevel(OutputAnalyzer output) throws Exception {
-        output.shouldContain("Thread started");
+        output.shouldMatch("Thread .* started");
         output.shouldContain("Thread is alive");
         output.shouldContain("Thread finished");
         output.shouldHaveExitValue(0);