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ProfilerRuntimeCPUFullInstr.java

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 * General Public License Version 2 only ("GPL") or the Common
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package org.netbeans.lib.profiler.server;

import org.netbeans.lib.profiler.server.system.Timers;


/**
 * This class contains the actual methods for full instrumentation recursive CPU profiling, calls to which are injected
 * into the target application (TA) bytecodes when they are instrumented.
 *
 * @author Tomas Hurka
 * @author Misha Dmitriev
 */
00053 public class ProfilerRuntimeCPUFullInstr extends ProfilerRuntimeCPU {
    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public static void enableProfiling(boolean v) {
        if (v) {
            createNewDataStructures();
            ProfilerRuntimeCPU.enableProfiling(v);
        } else {
            ProfilerRuntimeCPU.enableProfiling(v);
            clearDataStructures();
        }
    }

    // ---------------------------------- Profile Data Acquisition --------------------------------------
    /** Called upon entry into a special root method used for */
00068     public static void markerMethodEntry(char methodId) {
        if (recursiveInstrumentationDisabled) {
            return; // See the comment at the recursiveInstrumentationDisabled variable declaration
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.inProfilingRuntimeMethod > 0) {
            return;
        }

        //if (instrMethodClasses != null && methodId < instrMethodClasses.length) System.out.println("++++++Marker methodEntry for " + instrMethodClasses[methodId] + "." + instrMethodNames[methodId] + ", thread = " + Thread.currentThread());
        //else System.out.println("++++++Marker methodEntry for methodId = " + (int)methodId + ", thread = " + Thread.currentThread());
        if (!ti.isInitialized()) {
            if ((nProfiledThreadsAllowed > 0) && !ThreadInfo.isCurrentThreadProfilerServerThread()) {
                ti.initialize();
                ti.useEventBuffer();

                synchronized (eventBuffer) { // Make this happen atomically wrt. other operations on eventBuffer, such as reset collectors
                    nProfiledThreadsAllowed--;

                    ti.inProfilingRuntimeMethod++;
                    ti.inCallGraph = true;
                    writeThreadCreationEvent(ti);
                }
            } else {
                return;
            }
        } else {
            ti.inProfilingRuntimeMethod++;
            ti.inCallGraph = true;
        }

        // This is to bypass what seems to be a compiler bug (at least C1 on Windows): when methodId > 64K/2 is passed here
        // using our instrumentation's sipush command at the call site, it's treated here as a signed integer. Thus without
        // the below fix we can get e.g. an ArrayIndexOutOfBoundsException(-32768) when methodId == 32768 (***)
        methodId = (char) ((int) methodId);

        // DO NOT perform instrumentation of its immediate callees
        if (!instrMethodInvoked[methodId]) {
            instrMethodInvoked[methodId] = true;
        }

        ti.stackDepth++; //= 1;  // This is the logical stack depth
        writeTimeStampedEvent(MARKER_ENTRY, ti, methodId);
        ti.inProfilingRuntimeMethod--;
    }

    /** Called upon exit from the marker method. */
00117     public static void markerMethodExit(char methodId) {
        if (recursiveInstrumentationDisabled) {
            return;
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.isInitialized() && ti.inCallGraph) { // ti == null may happen if instrumentation has been removed or data collectors reset

            if (ti.inProfilingRuntimeMethod > 0) {
                return;
            }

            if (ti.rootMethodStackDepth > 0) {
                methodExit(methodId);
            } else {
                ti.inProfilingRuntimeMethod++;

                //System.out.println("------markerMethodExit for " + instrMethodClasses[methodId] + "." + instrMethodNames[methodId] + ", depth = " + ti.stackDepth + ", id = " + (int) methodId);
                ti.stackDepth--;

                if (ti.stackDepth < 1) {
                    ti.inCallGraph = false; // We are exiting the marker method of our call subgraph
                }

                writeTimeStampedEvent(MARKER_EXIT, ti, methodId);
                ti.inProfilingRuntimeMethod--;
            }
        }
    }

    /** Called upon entry into a non-root target application method */
00149     public static void methodEntry(char methodId) {
        if (recursiveInstrumentationDisabled) {
            return; // See the comment at the recursiveInstrumentationDisabled variable declaration
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.isInitialized() && ti.inCallGraph && (ti.rootMethodStackDepth > 0)) {
            if (ti.inProfilingRuntimeMethod > 0) {
                return;
            }

            ti.inProfilingRuntimeMethod++;
            //System.out.println("++++++methodEntry, depth = " + ti.stackDepth + ", id = " + (int) methodId);

            // See comment marked with (***)
            methodId = (char) ((int) methodId);

            // Now check if it's the first invocation of this method, and if so, perform instrumentation of nearest callees
            if (!instrMethodInvoked[methodId]) {
                long absTimeStamp = Timers.getCurrentTimeInCounts();
                long threadTimeStamp = Timers.getThreadCPUTimeInNanos();
                externalActionsHandler.handleFirstTimeMethodInvoke(methodId);
                instrMethodInvoked[methodId] = true; // Mark this method as invoked
                writeAdjustTimeEvent(ti, absTimeStamp, threadTimeStamp);
            }

            ti.stackDepth++;
            writeTimeStampedEvent(METHOD_ENTRY, ti, methodId);

            ti.inProfilingRuntimeMethod--;
        }
    }

    /** Called upon exit from the method. */
00184     public static void methodExit(char methodId) {
        if (recursiveInstrumentationDisabled) {
            return; // See the comment at the recursiveInstrumentationDisabled variable declaration
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.isInitialized() && ti.inCallGraph && (ti.rootMethodStackDepth > 0)) { // ti == null may happen if instrumentation has been removed or data collectors reset

            if (ti.inProfilingRuntimeMethod > 0) {
                return;
            }

            ti.inProfilingRuntimeMethod++;

            //System.out.println("------methodExit, depth = " + ti.stackDepth + ", id = " + (int) methodId);
            if (ti.rootMethodStackDepth == ti.stackDepth) {
                ti.rootMethodStackDepth = 0;
            }

            ti.stackDepth--;

            if (ti.stackDepth < 1) {
                ti.inCallGraph = false; // We are exiting the root method of our call subgraph
                writeTimeStampedEvent(ROOT_EXIT, ti, methodId);
            } else {
                writeTimeStampedEvent(METHOD_EXIT, ti, methodId);
            }

            ti.inProfilingRuntimeMethod--;
        }
    }

    public static void resumeActiveTimers() {
        writeTimeStampedEvent(THREADS_RESUMED, null, (char) 0); // FIXME: see above
        changeAllThreadsInProfRuntimeMethodStatus(-1); // See the comment in suspendActiveTimers()
        recursiveInstrumentationDisabled = false;
    }

    /** Called upon entry into a root target application method */
00224     public static void rootMethodEntry(char methodId) {
        if (recursiveInstrumentationDisabled) {
            return; // See the comment at the recursiveInstrumentationDisabled variable declaration
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.inProfilingRuntimeMethod > 0) {
            return;
        }

        ProfilerServer.notifyClientOnResultsAvailability();

        if (ti.isInitialized() && !ti.inCallGraph && (ti.stackDepth > 0)) {
            ti.inCallGraph = true;
            methodEntry(methodId);
            ti.inCallGraph = false;

            return;
        }

        if (ti.isInitialized() && ti.inCallGraph && (ti.rootMethodStackDepth > 0)) {
            methodEntry(methodId);
        } else { // Entered the root method from outside this call subgraph
                 //if (instrMethodClasses != null && methodId < instrMethodClasses.length) System.out.println("++++++Root methodEntry for " + instrMethodClasses[methodId] + "." + instrMethodNames[methodId] + ", thread = " + Thread.currentThread());
                 //else System.out.println("++++++Root methodEntry for methodId = " + (int)methodId + ", thread = " + Thread.currentThread());

            if (!ti.isInitialized()) {
                if ((nProfiledThreadsAllowed > 0) && !ThreadInfo.isCurrentThreadProfilerServerThread()) {
                    ti.initialize();
                    ti.useEventBuffer();

                    synchronized (eventBuffer) { // Make this happen atomically wrt. other operations on eventBuffer, such as reset collectors
                        nProfiledThreadsAllowed--;
                        ti.inProfilingRuntimeMethod++;

                        if (!ProfilerServer.startProfilingPointsActive()) {
                            ti.inCallGraph = true;
                        }

                        writeThreadCreationEvent(ti);
                    }
                } else {
                    return;
                }
            } else {
                if (ti.inProfilingRuntimeMethod > 0) {
                    return;
                }

                if (ti.stackDepth > 0) {
                    ti.rootMethodStackDepth = ti.stackDepth + 1;
                    methodEntry(methodId);

                    return;
                } else {
                    ti.inProfilingRuntimeMethod++;

                    if (!ProfilerServer.startProfilingPointsActive()) {
                        ti.inCallGraph = true;
                    }
                }
            }

            // This is to bypass what seems to be a compiler bug (at least C1 on Windows): when methodId > 64K/2 is passed here
            // using our instrumentation's sipush command at the call site, it's treated here as a signed integer. Thus without
            // the below fix we can get e.g. an ArrayIndexOutOfBoundsException(-32768) when methodId == 32768 (***)
            methodId = (char) ((int) methodId);

            // Check if it's the first invocation of this method, and if so, perform instrumentation of its immediate callees
            if (!instrMethodInvoked[methodId]) {
                externalActionsHandler.handleFirstTimeMethodInvoke(methodId);
                instrMethodInvoked[methodId] = true;
            }

            ti.stackDepth++; //= 1;  // This is the logical stack depth
            writeTimeStampedEvent(ROOT_ENTRY, ti, methodId);

            ti.rootMethodStackDepth = ti.stackDepth;
            ti.inProfilingRuntimeMethod--;
        }
    }

    public static void suspendActiveTimers() {
        changeAllThreadsInProfRuntimeMethodStatus(+1); // In case any instrumented method is called while we perform profiler work on behalf of this thread.
        recursiveInstrumentationDisabled = true;
        writeTimeStampedEvent(THREADS_SUSPENDED, null, (char) 0); // FIXME: need a special event writing method or something
    }

    protected static void clearDataStructures() {
        ProfilerRuntimeCPU.clearDataStructures();
    }
}

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