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6653858: dynamic languages need to be able to load anonymous classes

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Low-level privileged sun.misc.Unsafe.defineAnonymousClass

Reviewed-by: kvn
This commit is contained in:
John R Rose 2008-11-12 22:33:26 -08:00
parent 015a08b3e8
commit 849e0ffb04
19 changed files with 607 additions and 37 deletions
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38
hotspot/src/share/vm/classfile/classFileParser.hpp
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@ -33,6 +33,7 @@ class ClassFileParser VALUE_OBJ_CLASS_SPEC {
u2 _major_version;
u2 _minor_version;
symbolHandle _class_name;
GrowableArray<Handle>* _cp_patches; // overrides for CP entries
bool _has_finalizer;
bool _has_empty_finalizer;
@ -203,6 +204,35 @@ class ClassFileParser VALUE_OBJ_CLASS_SPEC {
char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
bool has_cp_patch_at(int index) {
assert(AnonymousClasses, "");
assert(index >= 0, "oob");
return (_cp_patches != NULL
&& index < _cp_patches->length()
&& _cp_patches->adr_at(index)->not_null());
}
Handle cp_patch_at(int index) {
assert(has_cp_patch_at(index), "oob");
return _cp_patches->at(index);
}
Handle clear_cp_patch_at(int index) {
Handle patch = cp_patch_at(index);
_cp_patches->at_put(index, Handle());
assert(!has_cp_patch_at(index), "");
return patch;
}
void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
// Wrapper for constantTag.is_klass_[or_]reference.
// In older versions of the VM, klassOops cannot sneak into early phases of
// constant pool construction, but in later versions they can.
// %%% Let's phase out the old is_klass_reference.
bool is_klass_reference(constantPoolHandle cp, int index) {
return ((LinkWellKnownClasses || AnonymousClasses)
? cp->tag_at(index).is_klass_or_reference()
: cp->tag_at(index).is_klass_reference());
}
public:
// Constructor
ClassFileParser(ClassFileStream* st) { set_stream(st); }
@ -218,6 +248,14 @@ class ClassFileParser VALUE_OBJ_CLASS_SPEC {
Handle class_loader,
Handle protection_domain,
symbolHandle& parsed_name,
TRAPS) {
return parseClassFile(name, class_loader, protection_domain, NULL, parsed_name, THREAD);
}
instanceKlassHandle parseClassFile(symbolHandle name,
Handle class_loader,
Handle protection_domain,
GrowableArray<Handle>* cp_patches,
symbolHandle& parsed_name,
TRAPS);
// Verifier checks