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Commit 7e4fdec6 authored by Mathieu Chartier's avatar Mathieu Chartier
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Add dalvik.vm.gctype to enable switching between different GCs. 

The option passes the specified GC type into the Xgc runtime
option.

Currently the three different supported GC types are MS, CMS, SS
which represent mark-sweep, concurrent mark-sweep, mark-sweep +
semi-space hybrid.

Change-Id: I6ad95c8d12c0d1158f7c861ff0c3180761619172
parent f226bc60

core/jni/AndroidRuntime.cpp

+8 −0
Original line number Diff line number Diff line
@@ -448,6 +448,7 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv) 
    char heapgrowthlimitOptsBuf[sizeof("-XX:HeapGrowthLimit=")-1 + PROPERTY_VALUE_MAX];

    char heapminfreeOptsBuf[sizeof("-XX:HeapMinFree=")-1 + PROPERTY_VALUE_MAX];

    char heapmaxfreeOptsBuf[sizeof("-XX:HeapMaxFree=")-1 + PROPERTY_VALUE_MAX];

    char gctypeOptsBuf[sizeof("-Xgc:")-1 + PROPERTY_VALUE_MAX];

    char heaptargetutilizationOptsBuf[sizeof("-XX:HeapTargetUtilization=")-1 + PROPERTY_VALUE_MAX];

    char jitcodecachesizeOptsBuf[sizeof("-Xjitcodecachesize:")-1 + PROPERTY_VALUE_MAX];

    char extraOptsBuf[PROPERTY_VALUE_MAX];
@@ -583,6 +584,13 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv) 
      mOptions.add(opt);

    }



    strcpy(gctypeOptsBuf, "-Xgc:");

    property_get("dalvik.vm.gctype", gctypeOptsBuf+5, "");

    if (gctypeOptsBuf[5] != '\0') {

        opt.optionString = gctypeOptsBuf;

        mOptions.add(opt);

    }



    /*

     * Enable or disable dexopt features, such as bytecode verification and

     * calculation of register maps for precise GC.