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* gnu-v3-abi.c (gnuv3_baseclass_offset): Check whether

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TYPE_VPTR_FIELDNO is valid.
This commit is contained in:
Daniel Jacobowitz
2003-08-22 20:45:55 +00:00
parent eb0d3137b1
commit 7ed85d2635
2 changed files with 12 additions and 2 deletions
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9
gdb/gnu-v3-abi.c
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@@ -412,10 +412,15 @@ gnuv3_baseclass_offset (struct type *type, int index, char *valaddr,
v3 C++ ABI Section 2.4.I.2.b. Fortunately the ABI guarantees that the
vtable pointer will be located at the beginning of the object, so we can
bypass the casting. Verify that the TYPE_VPTR_FIELDNO is in fact at the
start of whichever baseclass it resides in, as a sanity measure. */
start of whichever baseclass it resides in, as a sanity measure - iff
we have debugging information for that baseclass. */
vbasetype = TYPE_VPTR_BASETYPE (type);
if (TYPE_FIELD_BITPOS (vbasetype, TYPE_VPTR_FIELDNO (vbasetype)) != 0)
if (TYPE_VPTR_FIELDNO (vbasetype) < 0)
fill_in_vptr_fieldno (vbasetype);
if (TYPE_VPTR_FIELDNO (vbasetype) >= 0
&& TYPE_FIELD_BITPOS (vbasetype, TYPE_VPTR_FIELDNO (vbasetype)) != 0)
error ("Illegal vptr offset in class %s",
TYPE_NAME (vbasetype) ? TYPE_NAME (vbasetype) : "<unknown>");