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7194254: jstack reports wrong thread priorities

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Reviewed-by: dholmes, sla, fparain
This commit is contained in:
Dmytro Sheyko 2012-09-17 07:36:31 -04:00 • committed by David Holmes
parent c188598ddd
commit 48255b9ff3
5 changed files with 143 additions and 7 deletions
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11
hotspot/src/share/vm/runtime/os.cpp
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@ -201,14 +201,21 @@ OSReturn os::set_priority(Thread* thread, ThreadPriority p) {
}
}
// The mapping from OS priority back to Java priority may be inexact because
// Java priorities can map M:1 with native priorities. If you want the definite
// Java priority then use JavaThread::java_priority()
OSReturn os::get_priority(const Thread* const thread, ThreadPriority& priority) {
int p;
int os_prio;
OSReturn ret = get_native_priority(thread, &os_prio);
if (ret != OS_OK) return ret;
for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ;
if (java_to_os_priority[MaxPriority] > java_to_os_priority[MinPriority]) {
for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ;
} else {
// niceness values are in reverse order
for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] < os_prio; p--) ;
}
priority = (ThreadPriority)p;
return OS_OK;
}