Mercurial > hg > truffle
comparison src/share/vm/oops/instanceKlass.hpp @ 3249:e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes
| author | johnc |
|---|---|
| date | Thu, 07 Apr 2011 09:53:20 -0700 |
| parents | c7f3d0b4570f |
| children | 92add02409c9 |
comparison
equal
deleted
inserted
replaced
| 3248:e6beb62de02d | 3249:e1162778c1c8 |
|---|---|
| 401 | 401 |
| 402 // reference type | 402 // reference type |
| 403 ReferenceType reference_type() const { return _reference_type; } | 403 ReferenceType reference_type() const { return _reference_type; } |
| 404 void set_reference_type(ReferenceType t) { _reference_type = t; } | 404 void set_reference_type(ReferenceType t) { _reference_type = t; } |
| 405 | 405 |
| 406 static int reference_type_offset_in_bytes() { return offset_of(instanceKlass, _reference_type); } | |
| 407 | |
| 406 // find local field, returns true if found | 408 // find local field, returns true if found |
| 407 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; | 409 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 408 // find field in direct superinterfaces, returns the interface in which the field is defined | 410 // find field in direct superinterfaces, returns the interface in which the field is defined |
| 409 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; | 411 klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| 410 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined | 412 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |