8010722: assert: failed: heap size is too big for compressed oops
Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation.
Reviewed-by: stefank, dholmes
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package sun.hotspot;
import java.lang.reflect.Executable;
import java.security.BasicPermission;
import sun.hotspot.parser.DiagnosticCommand;
public class WhiteBox {
@SuppressWarnings("serial")
public static class WhiteBoxPermission extends BasicPermission {
public WhiteBoxPermission(String s) {
super(s);
}
}
private WhiteBox() {}
private static final WhiteBox instance = new WhiteBox();
private static native void registerNatives();
/**
* Returns the singleton WhiteBox instance.
*
* The returned WhiteBox object should be carefully guarded
* by the caller, since it can be used to read and write data
* at arbitrary memory addresses. It must never be passed to
* untrusted code.
*/
public synchronized static WhiteBox getWhiteBox() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new WhiteBoxPermission("getInstance"));
}
return instance;
}
static {
registerNatives();
}
// Get the maximum heap size supporting COOPs
public native long getCompressedOopsMaxHeapSize();
// Arguments
public native void printHeapSizes();
// Memory
public native long getObjectAddress(Object o);
public native int getHeapOopSize();
// Runtime
// Make sure class name is in the correct format
public boolean isClassAlive(String name) {
return isClassAlive0(name.replace('.', '/'));
}
private native boolean isClassAlive0(String name);
// G1
public native boolean g1InConcurrentMark();
public native boolean g1IsHumongous(Object o);
public native long g1NumFreeRegions();
public native int g1RegionSize();
public native Object[] parseCommandLine(String commandline, DiagnosticCommand[] args);
// NMT
public native long NMTMalloc(long size);
public native void NMTFree(long mem);
public native long NMTReserveMemory(long size);
public native void NMTCommitMemory(long addr, long size);
public native void NMTUncommitMemory(long addr, long size);
public native void NMTReleaseMemory(long addr, long size);
public native boolean NMTWaitForDataMerge();
public native boolean NMTIsDetailSupported();
// Compiler
public native void deoptimizeAll();
public boolean isMethodCompiled(Executable method) {
return isMethodCompiled(method, false /*not osr*/);
}
public native boolean isMethodCompiled(Executable method, boolean isOsr);
public boolean isMethodCompilable(Executable method) {
return isMethodCompilable(method, -1 /*any*/);
}
public boolean isMethodCompilable(Executable method, int compLevel) {
return isMethodCompilable(method, compLevel, false /*not osr*/);
}
public native boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr);
public native boolean isMethodQueuedForCompilation(Executable method);
public int deoptimizeMethod(Executable method) {
return deoptimizeMethod(method, false /*not osr*/);
}
public native int deoptimizeMethod(Executable method, boolean isOsr);
public void makeMethodNotCompilable(Executable method) {
makeMethodNotCompilable(method, -1 /*any*/);
}
public void makeMethodNotCompilable(Executable method, int compLevel) {
makeMethodNotCompilable(method, compLevel, false /*not osr*/);
}
public native void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr);
public int getMethodCompilationLevel(Executable method) {
return getMethodCompilationLevel(method, false /*not ost*/);
}
public native int getMethodCompilationLevel(Executable method, boolean isOsr);
public native boolean testSetDontInlineMethod(Executable method, boolean value);
public int getCompileQueuesSize() {
return getCompileQueueSize(-1 /*any*/);
}
public native int getCompileQueueSize(int compLevel);
public native boolean testSetForceInlineMethod(Executable method, boolean value);
public boolean enqueueMethodForCompilation(Executable method, int compLevel) {
return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/);
}
public native boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci);
public native void clearMethodState(Executable method);
public native int getMethodEntryBci(Executable method);
// Intered strings
public native boolean isInStringTable(String str);
// Memory
public native void readReservedMemory();
// force Full GC
public native void fullGC();
}