archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-25 13:54:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

4957990: Perm heap bloat in JVM

Browse source 
Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.

Reviewed-by: jcoomes, jmasa, kvn, never
This commit is contained in:
Y. Srinivas Ramakrishna 2009-09-02 00:04:29 -07:00
parent 2491751525
commit c6763b5bad
27 changed files with 385 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

20
hotspot/src/share/vm/interpreter/interpreterRuntime.cpp
View file

@ -849,8 +849,25 @@ static void trace_osr_request(methodHandle method, nmethod* osr, int bci) {
}
#endif // !PRODUCT
nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
if (branch_bcp != NULL && nm != NULL) {
// This was a successful request for an OSR nmethod. Because
// frequency_counter_overflow_inner ends with a safepoint check,
// nm could have been unloaded so look it up again. It's unsafe
// to examine nm directly since it might have been freed and used
// for something else.
frame fr = thread->last_frame();
methodOop method = fr.interpreter_frame_method();
int bci = method->bci_from(fr.interpreter_frame_bcp());
nm = method->lookup_osr_nmethod_for(bci);
}
return nm;
}
IRT_ENTRY(nmethod*,
InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp))
InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
// use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
// flag, in case this method triggers classloading which will call into Java.
UnlockFlagSaver fs(thread);
@ -923,7 +940,6 @@ IRT_ENTRY(nmethod*,
}
BiasedLocking::revoke(objects_to_revoke);
}
return osr_nm;
}
}