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8001071: Add simple range check into VM implemenation of Unsafe access methods

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Add simple check in debug version of VM.

Reviewed-by: twisti, johnc
This commit is contained in:
Vladimir Kozlov 2012-10-18 07:06:31 -07:00
parent 2d3b78abcc
commit 247b39e010
1 changed files with 2 additions and 0 deletions
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hotspot/src/share/vm/prims/unsafe.cpp
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@ -124,6 +124,8 @@ inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp,
"raw [ptr+disp] must be consistent with oop::field_base");
}
jlong p_size = HeapWordSize * (jlong)(p->size());
assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size));
}
#endif
if (sizeof(char*) == sizeof(jint)) // (this constant folds!)