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re PR libgcj/26861 (VirtualMachineError in interperter.)

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PR libgcj/26861:
	* interpret.cc (run) <insn_getfield>: Removed 0xffff check.
	<insn_putfield>: Likewise.
	(NULLCHECK): Define unconditionally.
	* link.cc (ensure_class_linked): Removed dead code.

From-SVN: r113531
This commit is contained in:
Tom Tromey 2006-05-04 17:35:05 +00:00 committed by Tom Tromey
parent b149e89e77
commit a7285117b4
3 changed files with 20 additions and 24 deletions
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8
libjava/ChangeLog
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@ -1,3 +1,11 @@
2006-05-04 Tom Tromey <tromey@redhat.com>
PR libgcj/26861:
* interpret.cc (run) <insn_getfield>: Removed 0xffff check.
<insn_putfield>: Likewise.
(NULLCHECK): Define unconditionally.
* link.cc (ensure_class_linked): Removed dead code.
2006-05-04 Tom Tromey <tromey@redhat.com>
* java/lang/Class.h (JV_STATE_LOADING): Added comment.

21
libjava/interpret.cc
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@ -25,7 +25,6 @@ details. */
#include <java/lang/StringBuffer.h>
#include <java/lang/Class.h>
#include <java/lang/reflect/Modifier.h>
#include <java/lang/VirtualMachineError.h>
#include <java/lang/InternalError.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/ArithmeticException.h>
@ -222,12 +221,20 @@ static jint get4(unsigned char* loc) {
#define SAVE_PC() frame_desc.pc = pc
#ifdef HANDLE_SEGV
#define NULLCHECK(X) SAVE_PC()
#define NULLARRAYCHECK(X) SAVE_PC()
#else
// We used to define this conditionally, depending on HANDLE_SEGV.
// However, that runs into a problem if a chunk in low memory is
// mapped and we try to look at a field near the end of a large
// object. See PR 26858 for details. It is, most likely, relatively
// inexpensive to simply do this check always.
#define NULLCHECK(X) \
do { SAVE_PC(); if ((X)==NULL) throw_null_pointer_exception (); } while (0)
// Note that we can still conditionally define NULLARRAYCHECK, since
// we know that all uses of an array will first reference the length
// field, which is first -- and thus will trigger a SEGV.
#ifdef HANDLE_SEGV
#define NULLARRAYCHECK(X) SAVE_PC()
#else
#define NULLARRAYCHECK(X) \
do { SAVE_PC(); if ((X)==NULL) { throw_null_pointer_exception (); } } while (0)
#endif
@ -2542,8 +2549,6 @@ _Jv_InterpMethod::run (void *retp, ffi_raw *args, _Jv_InterpMethod *meth)
jclass type = field->type;
jint field_offset = field->u.boffset;
if (field_offset > 0xffff)
throw new java::lang::VirtualMachineError;
jobject obj = POPA();
NULLCHECK(obj);
@ -2746,8 +2751,6 @@ _Jv_InterpMethod::run (void *retp, ffi_raw *args, _Jv_InterpMethod *meth)
(JvNewStringLatin1 ("field is static"));
jint field_offset = field->u.boffset;
if (field_offset > 0xffff)
throw new java::lang::VirtualMachineError;
void *newinsn = NULL;
if (type->isPrimitive ())

15
libjava/link.cc
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@ -1629,21 +1629,6 @@ _Jv_Linker::ensure_class_linked (jclass klass)
}
}
#if 0 // Should be redundant now
// If superclass looks like a constant pool entry,
// resolve it now.
if ((uaddr) klass->superclass < (uaddr) pool->size)
klass->superclass = pool->data[(uaddr) klass->superclass].clazz;
// Likewise for interfaces.
for (int i = 0; i < klass->interface_count; i++)
{
if ((uaddr) klass->interfaces[i] < (uaddr) pool->size)
klass->interfaces[i]
= pool->data[(uaddr) klass->interfaces[i]].clazz;
}
#endif
// Resolve the remaining constant pool entries.
for (int index = 1; index < pool->size; ++index)
{