# HG changeset patch
# User mlarsson
# Date 1438332052 -7200
#      Fri Jul 31 10:40:52 2015 +0200
# Node ID f438c138d812143ebfaee4db44852c94d2fbbc47
# Parent  d9bc27b8ef1ef2625fdbcc63491b4d3ab0e15fad
8065331: Add trace events for failed allocations
Reviewed-by:

diff --git a/src/share/vm/gc/shared/allocTracer.cpp b/src/share/vm/gc/shared/allocTracer.cpp
--- a/src/share/vm/gc/shared/allocTracer.cpp
+++ b/src/share/vm/gc/shared/allocTracer.cpp
@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 #include "gc/shared/allocTracer.hpp"
+#include "gc/shared/gcId.hpp"
 #include "runtime/handles.hpp"
 #include "trace/tracing.hpp"
 #include "utilities/globalDefinitions.hpp"
@@ -46,3 +47,12 @@
     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();
+  }
+}
diff --git a/src/share/vm/gc/shared/allocTracer.hpp b/src/share/vm/gc/shared/allocTracer.hpp
--- a/src/share/vm/gc/shared/allocTracer.hpp
+++ b/src/share/vm/gc/shared/allocTracer.hpp
@@ -32,6 +32,7 @@
   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_SHARED_ALLOCTRACER_HPP */
diff --git a/src/share/vm/gc/shared/vmGCOperations.cpp b/src/share/vm/gc/shared/vmGCOperations.cpp
--- a/src/share/vm/gc/shared/vmGCOperations.cpp
+++ b/src/share/vm/gc/shared/vmGCOperations.cpp
@@ -187,6 +187,18 @@
   gch->do_full_collection(gch->must_clear_all_soft_refs(), _max_generation);
 }
 
+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
@@ -291,3 +303,11 @@
     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());
+  }
+}
diff --git a/src/share/vm/gc/shared/vmGCOperations.hpp b/src/share/vm/gc/shared/vmGCOperations.hpp
--- a/src/share/vm/gc/shared/vmGCOperations.hpp
+++ b/src/share/vm/gc/shared/vmGCOperations.hpp
@@ -26,6 +26,7 @@
 #define SHARE_VM_GC_SHARED_VMGCOPERATIONS_HPP
 
 #include "gc/shared/collectedHeap.hpp"
+#include "gc/shared/gcId.hpp"
 #include "gc/shared/genCollectedHeap.hpp"
 #include "memory/heapInspection.hpp"
 #include "prims/jvmtiExport.hpp"
@@ -166,8 +167,7 @@
   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;
@@ -218,10 +218,7 @@
                                   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; }
diff --git a/src/share/vm/trace/trace.xml b/src/share/vm/trace/trace.xml
--- a/src/share/vm/trace/trace.xml
+++ b/src/share/vm/trace/trace.xml
@@ -1,6 +1,6 @@
 <?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
@@ -406,6 +406,12 @@
       <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"