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8151956: Support non-continuous CodeBlobs in HotSpot

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Reviewed-by: iveresov, thartmann, simonis
This commit is contained in:
Rickard Bäckman 2016-04-26 10:28:51 +02:00
parent 67ff4391ec
commit b853eb7f5c
100 changed files with 2486 additions and 1868 deletions
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14
hotspot/src/share/vm/runtime/thread.cpp
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@ -1432,7 +1432,7 @@ void JavaThread::initialize() {
set_vframe_array_last(NULL);
set_deferred_locals(NULL);
set_deopt_mark(NULL);
set_deopt_nmethod(NULL);
set_deopt_compiled_method(NULL);
clear_must_deopt_id();
set_monitor_chunks(NULL);
set_next(NULL);
@ -3300,26 +3300,26 @@ bool CompilerThread::can_call_java() const {
// Create sweeper thread
CodeCacheSweeperThread::CodeCacheSweeperThread()
: JavaThread(&sweeper_thread_entry) {
_scanned_nmethod = NULL;
_scanned_compiled_method = NULL;
}
void CodeCacheSweeperThread::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) {
JavaThread::oops_do(f, cld_f, cf);
if (_scanned_nmethod != NULL && cf != NULL) {
if (_scanned_compiled_method != NULL && cf != NULL) {
// Safepoints can occur when the sweeper is scanning an nmethod so
// process it here to make sure it isn't unloaded in the middle of
// a scan.
cf->do_code_blob(_scanned_nmethod);
cf->do_code_blob(_scanned_compiled_method);
}
}
void CodeCacheSweeperThread::nmethods_do(CodeBlobClosure* cf) {
JavaThread::nmethods_do(cf);
if (_scanned_nmethod != NULL && cf != NULL) {
if (_scanned_compiled_method != NULL && cf != NULL) {
// Safepoints can occur when the sweeper is scanning an nmethod so
// process it here to make sure it isn't unloaded in the middle of
// a scan.
cf->do_code_blob(_scanned_nmethod);
cf->do_code_blob(_scanned_compiled_method);
}
}
@ -4353,7 +4353,7 @@ void Threads::nmethods_do(CodeBlobClosure* cf) {
ALL_JAVA_THREADS(p) {
// This is used by the code cache sweeper to mark nmethods that are active
// on the stack of a Java thread. Ignore the sweeper thread itself to avoid
// marking CodeCacheSweeperThread::_scanned_nmethod as active.
// marking CodeCacheSweeperThread::_scanned_compiled_method as active.
if(!p->is_Code_cache_sweeper_thread()) {
p->nmethods_do(cf);
}