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src/share/vm/prims/whitebox.cpp
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rev 7508 : 8028595: WhiteBox API for stress testing of TieredCompilation
Reviewed-by:
@@ -67,10 +67,18 @@
#define SIZE_T_MAX_VALUE ((size_t) -1)
bool WhiteBox::_used = false;
volatile bool WhiteBox::compilation_locked = false;
+class VM_WhiteBoxOperation : public VM_Operation {
+ public:
+ VM_WhiteBoxOperation() { }
+ VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
+ bool allow_nested_vm_operations() const { return true; }
+};
+
+
WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
return (jlong)(void*)JNIHandles::resolve(obj);
WB_END
WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
@@ -402,10 +410,47 @@
assert(method != NULL, "method should not be null");
ThreadToNativeFromVM ttn(thread);
return env->FromReflectedMethod(method);
}
+// Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
+class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
+ private:
+ int _result;
+ const bool _make_not_entrant;
+ public:
+ VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
+ _result(0), _make_not_entrant(make_not_entrant) { }
+ int result() const { return _result; }
+
+ void doit() {
+ for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
+ if (t->has_last_Java_frame()) {
+ for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
+ frame* f = fst.current();
+ if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
+ RegisterMap* reg_map = fst.register_map();
+ Deoptimization::deoptimize(t, *f, reg_map);
+ if (_make_not_entrant) {
+ nmethod* nm = CodeCache::find_nmethod(f->pc());
+ assert(nm != NULL, "sanity check");
+ nm->make_not_entrant();
+ }
+ ++_result;
+ }
+ }
+ }
+ }
+ }
+};
+
+WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
+ VM_WhiteBoxDeoptimizeFrames op(make_not_entrant);
+ VMThread::execute(&op);
+ return op.result();
+WB_END
+
WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
MutexLockerEx mu(Compile_lock);
CodeCache::mark_all_nmethods_for_deoptimization();
VM_Deoptimize op;
VMThread::execute(&op);
@@ -524,17 +569,10 @@
nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
MutexLockerEx mu(Compile_lock);
return (mh->queued_for_compilation() || nm != NULL);
WB_END
-class VM_WhiteBoxOperation : public VM_Operation {
- public:
- VM_WhiteBoxOperation() { }
- VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
- bool allow_nested_vm_operations() const { return true; }
-};
-
class AlwaysFalseClosure : public BoolObjectClosure {
public:
bool do_object_b(oop p) { return false; }
};
@@ -759,11 +797,10 @@
if (needFree) {
FREE_C_HEAP_ARRAY(char, ccstrResult);
}
WB_END
-
WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
WhiteBox::compilation_locked = true;
WB_END
WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
@@ -1199,10 +1236,11 @@
{CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
{CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
{CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
{CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
#endif // INCLUDE_NMT
+ {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
{CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
{CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
(void*)&WB_DeoptimizeMethod },
{CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
(void*)&WB_IsMethodCompiled },
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