https://openjdk.java.net/ 
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.vm.ci.code;

import jdk.vm.ci.code.site.Call;
import jdk.vm.ci.code.site.Mark;
import jdk.vm.ci.meta.ResolvedJavaMethod;
import jdk.vm.ci.meta.SpeculationLog;


Access to code cache related details and requirements.

/**
 * Access to code cache related details and requirements.
 */
public interface CodeCacheProvider {

    
Installs code for a given method based on a given compilation result without making it the
default implementation of the method.

Params:
  • method – a method implemented by the installed code
  • compiledCode – the compiled code to be added
  • log – the speculation log to be used
  • installedCode – a predefined InstalledCode object to use as a reference to the installed code. If null, a new InstalledCode object will be created.
Throws:
Returns:a reference to the ready-to-run code
/**
     * Installs code for a given method based on a given compilation result without making it the
     * default implementation of the method.
     *
     * @param method a method implemented by the installed code
     * @param compiledCode the compiled code to be added
     * @param log the speculation log to be used
     * @param installedCode a predefined {@link InstalledCode} object to use as a reference to the
     *            installed code. If {@code null}, a new {@link InstalledCode} object will be
     *            created.
     * @return a reference to the ready-to-run code
     * @throws BailoutException if the code installation failed
     */
    default InstalledCode addCode(ResolvedJavaMethod method, CompiledCode compiledCode, SpeculationLog log, InstalledCode installedCode) {
        return installCode(method, compiledCode, installedCode, log, false);
    }

    
Installs code for a given method based on a given compilation result and makes it the default
implementation of the method.

Params:
  • method – a method implemented by the installed code and for which the installed code
           becomes the default implementation
  • compiledCode – the compiled code to be added
Throws:
Returns:a reference to the ready-to-run code
/**
     * Installs code for a given method based on a given compilation result and makes it the default
     * implementation of the method.
     *
     * @param method a method implemented by the installed code and for which the installed code
     *            becomes the default implementation
     * @param compiledCode the compiled code to be added
     * @return a reference to the ready-to-run code
     * @throws BailoutException if the code installation failed
     */
    default InstalledCode setDefaultCode(ResolvedJavaMethod method, CompiledCode compiledCode) {
        return installCode(method, compiledCode, null, null, true);
    }

    
Installs code based on a given compilation result.

Params:
  • method – the method compiled to produce compiledCode or null if the input to compResult was not a ResolvedJavaMethod
  • compiledCode – the compiled code to be added
  • installedCode – a pre-allocated InstalledCode object to use as a reference to the installed code. If null, a new InstalledCode object will be created.
  • log – the speculation log to be used
  • isDefault – specifies if the installed code should be made the default implementation of compRequest.getMethod(). The default implementation for a method is the code executed for standard calls to the method. This argument is ignored if compRequest == null.
Throws:
Returns:a reference to the compiled and ready-to-run installed code
/**
     * Installs code based on a given compilation result.
     *
     * @param method the method compiled to produce {@code compiledCode} or {@code null} if the
     *            input to {@code compResult} was not a {@link ResolvedJavaMethod}
     * @param compiledCode the compiled code to be added
     * @param installedCode a pre-allocated {@link InstalledCode} object to use as a reference to
     *            the installed code. If {@code null}, a new {@link InstalledCode} object will be
     *            created.
     * @param log the speculation log to be used
     * @param isDefault specifies if the installed code should be made the default implementation of
     *            {@code compRequest.getMethod()}. The default implementation for a method is the
     *            code executed for standard calls to the method. This argument is ignored if
     *            {@code compRequest == null}.
     * @return a reference to the compiled and ready-to-run installed code
     * @throws BailoutException if the code installation failed
     */
    InstalledCode installCode(ResolvedJavaMethod method, CompiledCode compiledCode, InstalledCode installedCode, SpeculationLog log, boolean isDefault);

    
Invalidates installedCode such that InvalidInstalledCodeException will be raised the next time installedCode is executed. 
/**
     * Invalidates {@code installedCode} such that {@link InvalidInstalledCodeException} will be
     * raised the next time {@code installedCode} is
     * {@linkplain InstalledCode#executeVarargs(Object...) executed}.
     */
    void invalidateInstalledCode(InstalledCode installedCode);

    
Gets a name for a Mark mark. 
/**
     * Gets a name for a {@link Mark} mark.
     */
    default String getMarkName(Mark mark) {
        return String.valueOf(mark.id);
    }

    
Gets a name for the target of a Call. 
/**
     * Gets a name for the {@linkplain Call#target target} of a {@link Call}.
     */
    default String getTargetName(Call call) {
        return String.valueOf(call.target);
    }

    
Gets the register configuration to use when compiling a given method.

/**
     * Gets the register configuration to use when compiling a given method.
     */
    RegisterConfig getRegisterConfig();

    
Minimum size of the stack area reserved for outgoing parameters. This area is reserved in all
cases, even when the compiled method has no regular call instructions.

Returns:the minimum size of the outgoing parameter area in bytes
/**
     * Minimum size of the stack area reserved for outgoing parameters. This area is reserved in all
     * cases, even when the compiled method has no regular call instructions.
     *
     * @return the minimum size of the outgoing parameter area in bytes
     */
    int getMinimumOutgoingSize();

    
Gets a description of the target architecture.

/**
     * Gets a description of the target architecture.
     */
    TargetDescription getTarget();

    
Create a new speculation log for the target runtime.

/**
     * Create a new speculation log for the target runtime.
     */
    SpeculationLog createSpeculationLog();

    
Returns the maximum absolute offset of a PC relative call to a given address from any
position in the code cache or -1 when not applicable. Intended for determining the required
size of address/offset fields.

/**
     * Returns the maximum absolute offset of a PC relative call to a given address from any
     * position in the code cache or -1 when not applicable. Intended for determining the required
     * size of address/offset fields.
     */
    long getMaxCallTargetOffset(long address);

    
Determines if debug info should also be emitted at non-safepoint locations.

/**
     * Determines if debug info should also be emitted at non-safepoint locations.
     */
    boolean shouldDebugNonSafepoints();
}