diff options
Diffstat (limited to 'gdb/gnu-v3-abi.c')
| -rw-r--r-- | gdb/gnu-v3-abi.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gdb/gnu-v3-abi.c b/gdb/gnu-v3-abi.c index d9947f9f87d..b18e644796e 100644 --- a/gdb/gnu-v3-abi.c +++ b/gdb/gnu-v3-abi.c @@ -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>"); |