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comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/CompilerToVM.java @ 23679:b5557b757040

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fix HotSpotVMConfig startup performance (JDK-8159167)
author Doug Simon <doug.simon@oracle.com>
date Wed, 15 Jun 2016 00:00:41 +0200
parents 1d4ce2d19e52
children 8b40dfc73eea
comparison
equal deleted inserted replaced
23678:e86a0b0ba969 23679:b5557b757040
33 import jdk.vm.ci.code.InstalledCode; 33 import jdk.vm.ci.code.InstalledCode;
34 import jdk.vm.ci.code.InvalidInstalledCodeException; 34 import jdk.vm.ci.code.InvalidInstalledCodeException;
35 import jdk.vm.ci.code.TargetDescription; 35 import jdk.vm.ci.code.TargetDescription;
36 import jdk.vm.ci.common.InitTimer; 36 import jdk.vm.ci.common.InitTimer;
37 import jdk.vm.ci.common.JVMCIError; 37 import jdk.vm.ci.common.JVMCIError;
38 import jdk.vm.ci.hotspotvmconfig.HotSpotVMField;
39 import jdk.vm.ci.meta.JavaType; 38 import jdk.vm.ci.meta.JavaType;
40 import jdk.vm.ci.meta.ResolvedJavaMethod; 39 import jdk.vm.ci.meta.ResolvedJavaMethod;
41 import jdk.vm.ci.meta.ResolvedJavaType; 40 import jdk.vm.ci.meta.ResolvedJavaType;
42 import sun.misc.Unsafe; 41 import sun.misc.Unsafe;
43 42
319 * Resets all compilation statistics. 318 * Resets all compilation statistics.
320 */ 319 */
321 native void resetCompilationStatistics(); 320 native void resetCompilationStatistics();
322 321
323 /** 322 /**
324 * Initializes the fields of {@code config}. 323 * Reads the database of VM info. The return value encodes the info in a nested object array
325 */ 324 * that is described by the pseudo Java object {@code info} below:
326 native void initializeConfiguration(HotSpotVMConfig config); 325 *
326 * <pre>
327 * info = [
328 * VMField[] vmFields,
329 * [String name, Long size, ...] vmTypeSizes,
330 * [String name, Long value, ...] vmConstants,
331 * [String name, Long value, ...] vmAddresses,
332 * VMFlag[] vmFlags
333 * ]
334 * </pre>
335 *
336 * @return VM info as encoded above
337 */
338 native Object[] readConfiguration();
327 339
328 /** 340 /**
329 * Resolves the implementation of {@code method} for virtual dispatches on objects of dynamic 341 * Resolves the implementation of {@code method} for virtual dispatches on objects of dynamic
330 * type {@code exactReceiver}. This resolution process only searches "up" the class hierarchy of 342 * type {@code exactReceiver}. This resolution process only searches "up" the class hierarchy of
331 * {@code exactReceiver}. 343 * {@code exactReceiver}.
419 * @return 0 if {@code method} does not have a local variable table 431 * @return 0 if {@code method} does not have a local variable table
420 */ 432 */
421 native long getLocalVariableTableStart(HotSpotResolvedJavaMethodImpl method); 433 native long getLocalVariableTableStart(HotSpotResolvedJavaMethodImpl method);
422 434
423 /** 435 /**
424 * Reads an object pointer within a VM data structure. That is, any {@link HotSpotVMField} whose 436 * Reads an object pointer within a VM data structure. That is, any {@link VMField} whose
425 * {@link HotSpotVMField#type() type} is {@code "oop"} (e.g., 437 * {@link VMField#type type} is {@code "oop"} (e.g., {@code ArrayKlass::_component_mirror},
426 * {@code ArrayKlass::_component_mirror}, {@code Klass::_java_mirror}, 438 * {@code Klass::_java_mirror}, {@code JavaThread::_threadObj}).
427 * {@code JavaThread::_threadObj}).
428 * 439 *
429 * Note that {@link Unsafe#getObject(Object, long)} cannot be used for this since it does a 440 * Note that {@link Unsafe#getObject(Object, long)} cannot be used for this since it does a
430 * {@code narrowOop} read if the VM is using compressed oops whereas oops within VM data 441 * {@code narrowOop} read if the VM is using compressed oops whereas oops within VM data
431 * structures are (currently) always uncompressed. 442 * structures are (currently) always uncompressed.
432 * 443 *