8065331: Add trace events for failed allocations

Reviewed-by: ehelin, jwilhelm

src/share/vm/gc_implementation/shared/vmGCOperations.cpp

@@ -209,6 +209,18 @@ void VM_GenCollectFull::doit() {
   gch->do_full_collection(gch->must_clear_all_soft_refs(), _max_level);
 }
 
+VM_CollectForMetadataAllocation::VM_CollectForMetadataAllocation(ClassLoaderData* loader_data,
+                                                                 size_t size,
+                                                                 Metaspace::MetadataType mdtype,
+                                                                 uint gc_count_before,
+                                                                 uint full_gc_count_before,
+                                                                 GCCause::Cause gc_cause)
+    : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true),
+      _loader_data(loader_data), _size(size), _mdtype(mdtype), _result(NULL) {
+  assert(_size != 0, "An allocation should always be requested with this operation.");
+  AllocTracer::send_allocation_requiring_gc_event(_size * HeapWordSize, GCId::peek());
+}
+
 // Returns true iff concurrent GCs unloads metadata.
 bool VM_CollectForMetadataAllocation::initiate_concurrent_GC() {
 #if INCLUDE_ALL_GCS
@@ -313,3 +325,11 @@ void VM_CollectForMetadataAllocation::doit() {
     set_gc_locked();
   }
 }
+
+VM_CollectForAllocation::VM_CollectForAllocation(size_t word_size, uint gc_count_before, GCCause::Cause cause)
+    : VM_GC_Operation(gc_count_before, cause), _result(NULL), _word_size(word_size) {
+  // Only report if operation was really caused by an allocation.
+  if (_word_size != 0) {
+    AllocTracer::send_allocation_requiring_gc_event(_word_size * HeapWordSize, GCId::peek());
+  }
+}

src/share/vm/gc_implementation/shared/vmGCOperations.hpp

@@ -25,6 +25,7 @@
 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_VMGCOPERATIONS_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_VMGCOPERATIONS_HPP
 
+#include "gc_implementation/shared/gcId.hpp"
 #include "memory/heapInspection.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/jniHandles.hpp"
@@ -168,8 +169,7 @@ class VM_CollectForAllocation : public VM_GC_Operation {
   HeapWord* _result;    // Allocation result (NULL if allocation failed)
 
  public:
-  VM_CollectForAllocation(size_t word_size, uint gc_count_before, GCCause::Cause cause)
-    : VM_GC_Operation(gc_count_before, cause), _result(NULL), _word_size(word_size) {}
+  VM_CollectForAllocation(size_t word_size, uint gc_count_before, GCCause::Cause cause);
 
   HeapWord* result() const {
     return _result;
@@ -220,10 +220,7 @@ class VM_CollectForMetadataAllocation: public VM_GC_Operation {
                                   size_t size, Metaspace::MetadataType mdtype,
                                   uint gc_count_before,
                                   uint full_gc_count_before,
-                                  GCCause::Cause gc_cause)
-    : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true),
-      _loader_data(loader_data), _size(size), _mdtype(mdtype), _result(NULL) {
-  }
+                                  GCCause::Cause gc_cause);
   virtual VMOp_Type type() const { return VMOp_CollectForMetadataAllocation; }
   virtual void doit();
   MetaWord* result() const       { return _result; }

src/share/vm/gc_interface/allocTracer.cpp

 /*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,6 +23,7 @@
  */
 
 #include "precompiled.hpp"
+#include "gc_implementation/shared/gcId.hpp"
 #include "gc_interface/allocTracer.hpp"
 #include "trace/tracing.hpp"
 #include "runtime/handles.hpp"
@@ -46,3 +47,12 @@ void AllocTracer::send_allocation_in_new_tlab_event(KlassHandle klass, size_t tl
     event.commit();
   }
 }
+
+void AllocTracer::send_allocation_requiring_gc_event(size_t size, const GCId& gcId) {
+  EventAllocationRequiringGC event;
+  if (event.should_commit()) {
+    event.set_gcId(gcId.id());
+    event.set_size(size);
+    event.commit();
+  }
+}

src/share/vm/gc_interface/allocTracer.hpp

 /*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,6 +32,7 @@ class AllocTracer : AllStatic {
   public:
     static void send_allocation_outside_tlab_event(KlassHandle klass, size_t alloc_size);
     static void send_allocation_in_new_tlab_event(KlassHandle klass, size_t tlab_size, size_t alloc_size);
+    static void send_allocation_requiring_gc_event(size_t size, const GCId& gcId);
 };
 
 #endif /* SHARE_VM_GC_INTERFACE_ALLOCTRACER_HPP */

src/share/vm/trace/trace.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--
- Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 
  This code is free software; you can redistribute it and/or modify it
@@ -352,6 +352,12 @@ Declares a structure type that can be used in other events.
       <value type="UTF8" field="name" label="Name" />
     </event>
 
+    <event id="AllocationRequiringGC" path="vm/gc/detailed/allocation_requiring_gc" label="Allocation Requiring GC"
+           has_thread="true" has_stacktrace="true"  is_instant="true">
+      <value type="UINT" field="gcId"  label="Pending GC ID" relation="GC_ID" />
+      <value type="BYTES64" field="size" label="Allocation Size" />
+    </event>
+
     <!-- Compiler events -->
 
     <event id="Compilation" path="vm/compiler/compilation" label="Compilation"