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7141200: log some interesting information in ring buffers for crashes

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Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
This commit is contained in:
Tom Rodriguez 2012-02-01 07:59:01 -08:00
parent a59952f4c9
commit 5a41427b37
30 changed files with 539 additions and 369 deletions
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33
hotspot/src/share/vm/gc_interface/collectedHeap.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2012, 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
@ -51,6 +51,31 @@ int CollectedHeap::_fire_out_of_memory_count = 0;
size_t CollectedHeap::_filler_array_max_size = 0;
template <>
void EventLogBase<GCMessage>::print(outputStream* st, GCMessage& m) {
st->print_cr("GC heap %s", m.is_before ? "before" : "after");
st->print_raw(m);
}
void GCHeapLog::log_heap(bool before) {
if (!should_log()) {
return;
}
jlong timestamp = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag);
int index = compute_log_index();
_records[index].thread = NULL; // Its the GC thread so it's not that interesting.
_records[index].timestamp = timestamp;
_records[index].data.is_before = before;
stringStream st(_records[index].data.buffer(), _records[index].data.size());
if (before) {
Universe::print_heap_before_gc(&st);
} else {
Universe::print_heap_after_gc(&st);
}
}
// Memory state functions.
@ -81,6 +106,12 @@ CollectedHeap::CollectedHeap() : _n_par_threads(0)
80, GCCause::to_string(_gc_lastcause), CHECK);
}
_defer_initial_card_mark = false; // strengthened by subclass in pre_initialize() below.
// Create the ring log
if (LogEvents) {
_gc_heap_log = new GCHeapLog();
} else {
_gc_heap_log = NULL;
}
}
void CollectedHeap::pre_initialize() {