archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-26 14:24:46 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8074980: add WhiteBox API to get a flag value for a method

Browse source 
Reviewed-by: kvn, fzhinkin
This commit is contained in:
Igor Ignatyev 2015-03-12 19:11:25 +03:00
parent b78d23ed01
commit cc89bac7ab
2 changed files with 188 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

84
hotspot/src/share/vm/prims/whitebox.cpp
View file

@ -1133,6 +1133,75 @@ WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
VMThread::execute(&force_safepoint_op);
WB_END
template <typename T>
static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
assert(value != NULL, "sanity");
if (method == NULL || name == NULL) {
return false;
}
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, false);
methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
const char* flag_name = env->GetStringUTFChars(name, NULL);
bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
env->ReleaseStringUTFChars(name, flag_name);
return result;
}
WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
bool result;
if (GetMethodOption<bool> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return booleanBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
intx result;
if (GetMethodOption <intx> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return longBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
uintx result;
if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return longBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
double result;
if (GetMethodOption <double> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return doubleBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
ccstr ccstrResult;
if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
jstring result = env->NewStringUTF(ccstrResult);
CHECK_JNI_EXCEPTION_(env, NULL);
return result;
}
return NULL;
WB_END
//Some convenience methods to deal with objects from java
int WhiteBox::offset_for_field(const char* field_name, oop object,
Symbol* signature_symbol) {
@ -1333,6 +1402,21 @@ static JNINativeMethod methods[] = {
{CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
{CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
{CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
{CC"getMethodBooleanOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
(void*)&WB_GetMethodBooleaneOption},
{CC"getMethodIntxOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetMethodIntxOption},
{CC"getMethodUintxOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetMethodUintxOption},
{CC"getMethodDoubleOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
(void*)&WB_GetMethodDoubleOption},
{CC"getMethodStringOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
(void*)&WB_GetMethodStringOption},
};
#undef CC