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6880029: JDK 1.6.0_u14p Application crashed very early

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Reviewed-by: never, ysr, acorn
This commit is contained in:
Xiaobin Lu 2009-09-24 12:10:46 -07:00
parent f6523d1043
commit 89aa7fcef6
1 changed files with 10 additions and 4 deletions
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14
hotspot/src/share/vm/runtime/safepoint.cpp
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@ -81,6 +81,14 @@ void SafepointSynchronize::begin() {
jlong safepoint_limit_time; jlong safepoint_limit_time;
timeout_error_printed = false; timeout_error_printed = false;
// PrintSafepointStatisticsTimeout can be specified separately. When
// specified, PrintSafepointStatistics will be set to true in
// deferred_initialize_stat method. The initialization has to be done
// early enough to avoid any races. See bug 6880029 for details.
if (PrintSafepointStatistics || PrintSafepointStatisticsTimeout > 0) {
deferred_initialize_stat();
}
// Begin the process of bringing the system to a safepoint. // Begin the process of bringing the system to a safepoint.
// Java threads can be in several different states and are // Java threads can be in several different states and are
// stopped by different mechanisms: // stopped by different mechanisms:
@ -169,8 +177,7 @@ void SafepointSynchronize::begin() {
} }
} }
if ( (PrintSafepointStatistics || (PrintSafepointStatisticsTimeout > 0)) if (PrintSafepointStatistics && iterations == 0) {
&& iterations == 0) {
begin_statistics(nof_threads, still_running); begin_statistics(nof_threads, still_running);
} }
@ -1026,8 +1033,7 @@ void SafepointSynchronize::deferred_initialize_stat() {
} }
void SafepointSynchronize::begin_statistics(int nof_threads, int nof_running) { void SafepointSynchronize::begin_statistics(int nof_threads, int nof_running) {
deferred_initialize_stat(); assert(init_done, "safepoint statistics array hasn't been initialized");
SafepointStats *spstat = &_safepoint_stats[_cur_stat_index]; SafepointStats *spstat = &_safepoint_stats[_cur_stat_index];
VM_Operation *op = VMThread::vm_operation(); VM_Operation *op = VMThread::vm_operation();