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8154096: Extend WhiteBox API with methods which retrieve from VM information about available GC

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Reviewed-by: iignatyev, kbarrett
This commit is contained in:
Dmitry Fazunenko 2016-05-30 19:56:27 +04:00
parent 286b967574
commit acc40d57ab
1 changed files with 47 additions and 1 deletions
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46
hotspot/src/share/vm/prims/whitebox.cpp
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@ -278,6 +278,49 @@ WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
(size_t) magnitude, (size_t) iterations); (size_t) magnitude, (size_t) iterations);
WB_END WB_END
static const jint serial_code = 1;
static const jint parallel_code = 2;
static const jint cms_code = 4;
static const jint g1_code = 8;
WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
if (UseSerialGC) {
return serial_code;
} else if (UseParallelGC || UseParallelOldGC) {
return parallel_code;
} if (UseConcMarkSweepGC) {
return cms_code;
} else if (UseG1GC) {
return g1_code;
}
ShouldNotReachHere();
return 0;
WB_END
WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
#if INCLUDE_ALL_GCS
return serial_code | parallel_code | cms_code | g1_code;
#else
return serial_code;
#endif // INCLUDE_ALL_GCS
WB_END
WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
if (UseSerialGC) {
return FLAG_IS_ERGO(UseSerialGC);
} else if (UseParallelGC) {
return FLAG_IS_ERGO(UseParallelGC);
} else if (UseParallelOldGC) {
return FLAG_IS_ERGO(UseParallelOldGC);
} else if (UseConcMarkSweepGC) {
return FLAG_IS_ERGO(UseConcMarkSweepGC);
} else if (UseG1GC) {
return FLAG_IS_ERGO(UseG1GC);
}
ShouldNotReachHere();
return false;
WB_END
WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj)) WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
oop p = JNIHandles::resolve(obj); oop p = JNIHandles::resolve(obj);
#if INCLUDE_ALL_GCS #if INCLUDE_ALL_GCS
@ -1834,6 +1877,9 @@ static JNINativeMethod methods[] = {
{CC"addCompilerDirective", CC"(Ljava/lang/String;)I", {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
(void*)&WB_AddCompilerDirective }, (void*)&WB_AddCompilerDirective },
{CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective }, {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
{CC"currentGC", CC"()I", (void*)&WB_CurrentGC},
{CC"allSupportedGC", CC"()I", (void*)&WB_AllSupportedGC},
{CC"gcSelectedByErgo", CC"()Z", (void*)&WB_GCSelectedByErgo},
}; };
#undef CC #undef CC