/* Mark the set of root objects.
*
* Things we need to scan:
* - System classes defined by root classloader
* - For each thread:
* - Interpreted stack, from top to "curFrame"
* - Dalvik registers (args + local vars)
* - JNI local references
* - Automatic VM local references (TrackedAlloc)
* - Associated Thread/VMThread object
* - ThreadGroups (could track & start with these instead of working
* upward from Threads)
* - Exception currently being thrown, if present
* - JNI global references
* - Interned string table
* - Primitive classes
* - Special objects
* - gDvm.outOfMemoryObj
* - Objects allocated with ALLOC_NO_GC
* - Objects pending finalization (but not yet finalized)
* - Objects in debugger object registry
*
* Don't need:
* - Native stack (for in-progress stuff in the VM)
* - The TrackedAlloc stuff watches all native VM references.
*/
void dvmHeapMarkRootSet()
{
GcHeap *gcHeap = gDvm.gcHeap;
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_STICKY_CLASS, 0);
LOG_SCAN("immune objects");
dvmMarkImmuneObjects(gcHeap->markContext.immuneLimit);
LOG_SCAN("root class loader\n");
dvmGcScanRootClassLoader();
LOG_SCAN("primitive classes\n");
dvmGcScanPrimitiveClasses();
/* dvmGcScanRootThreadGroups() sets a bunch of
* different scan states internally.
*/
HPROF_CLEAR_GC_SCAN_STATE();
LOG_SCAN("root thread groups\n");
dvmGcScanRootThreadGroups();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_INTERNED_STRING, 0);
LOG_SCAN("interned strings\n");
dvmGcScanInternedStrings();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_JNI_GLOBAL, 0);
LOG_SCAN("JNI global refs\n");
dvmGcMarkJniGlobalRefs();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_REFERENCE_CLEANUP, 0);
LOG_SCAN("pending reference operations\n");
dvmHeapMarkLargeTableRefs(gcHeap->referenceOperations);
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_FINALIZING, 0);
LOG_SCAN("pending finalizations\n");
dvmHeapMarkLargeTableRefs(gcHeap->pendingFinalizationRefs);
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_DEBUGGER, 0);
LOG_SCAN("debugger refs\n");
dvmGcMarkDebuggerRefs();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_VM_INTERNAL, 0);
/* Mark any special objects we have sitting around.
*/
LOG_SCAN("special objects\n");
dvmMarkObjectNonNull(gDvm.outOfMemoryObj);
dvmMarkObjectNonNull(gDvm.internalErrorObj);
dvmMarkObjectNonNull(gDvm.noClassDefFoundErrorObj);
//TODO: scan object references sitting in gDvm; use pointer begin & end
HPROF_CLEAR_GC_SCAN_STATE();
}
/* Mark the set of root objects.
*
* Things we need to scan:
* - System classes defined by root classloader
* - For each thread:
* - Interpreted stack, from top to "curFrame"
* - Dalvik registers (args + local vars)
* - JNI local references
* - Automatic VM local references (TrackedAlloc)
* - Associated Thread/VMThread object
* - ThreadGroups (could track & start with these instead of working
* upward from Threads)
* - Exception currently being thrown, if present
* - JNI global references
* - Interned string table
* - Primitive classes
* - Special objects
* - gDvm.outOfMemoryObj
* - Objects allocated with ALLOC_NO_GC
* - Objects pending finalization (but not yet finalized)
* - Objects in debugger object registry
*
* Don't need:
* - Native stack (for in-progress stuff in the VM)
* - The TrackedAlloc stuff watches all native VM references.
*/
void dvmHeapMarkRootSet()
{
HeapRefTable *refs;
GcHeap *gcHeap;
Object **op;
gcHeap = gDvm.gcHeap;
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_STICKY_CLASS, 0);
LOG_SCAN("root class loader\n");
dvmGcScanRootClassLoader();
LOG_SCAN("primitive classes\n");
dvmGcScanPrimitiveClasses();
/* dvmGcScanRootThreadGroups() sets a bunch of
* different scan states internally.
*/
HPROF_CLEAR_GC_SCAN_STATE();
LOG_SCAN("root thread groups\n");
dvmGcScanRootThreadGroups();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_INTERNED_STRING, 0);
LOG_SCAN("interned strings\n");
dvmGcScanInternedStrings();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_JNI_GLOBAL, 0);
LOG_SCAN("JNI global refs\n");
dvmGcMarkJniGlobalRefs();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_REFERENCE_CLEANUP, 0);
LOG_SCAN("pending reference operations\n");
dvmHeapMarkLargeTableRefs(gcHeap->referenceOperations, true);
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_FINALIZING, 0);
LOG_SCAN("pending finalizations\n");
dvmHeapMarkLargeTableRefs(gcHeap->pendingFinalizationRefs, false);
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_DEBUGGER, 0);
LOG_SCAN("debugger refs\n");
dvmGcMarkDebuggerRefs();
HPROF_SET_GC_SCAN_STATE(HPROF_ROOT_VM_INTERNAL, 0);
/* Mark all ALLOC_NO_GC objects.
*/
LOG_SCAN("ALLOC_NO_GC objects\n");
refs = &gcHeap->nonCollectableRefs;
op = refs->table;
while ((uintptr_t)op < (uintptr_t)refs->nextEntry) {
dvmMarkObjectNonNull(*(op++));
}
/* Mark any special objects we have sitting around.
*/
LOG_SCAN("special objects\n");
dvmMarkObjectNonNull(gDvm.outOfMemoryObj);
dvmMarkObjectNonNull(gDvm.internalErrorObj);
//TODO: scan object references sitting in gDvm; use pointer begin & end
HPROF_CLEAR_GC_SCAN_STATE();
}
