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Fix for PR 18470: 

* value.c (value_virtual_fn_field): Handle the situation where
	vtbl is a pointer to a structure instead of a pointer to an array.
This commit is contained in:
Mark Alexander 1998-12-21 21:34:39 +00:00
parent e98fe4f7b5
commit 4a1b8bb277
2 changed files with 34 additions and 8 deletions
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10
gdb/ChangeLog
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@ -1,3 +1,13 @@
Mon Dec 21 13:30:34 1998 Mark Alexander <marka@cygnus.com>
* value.c (value_virtual_fn_field): Handle the situation where
vtbl is a pointer to a structure instead of a pointer to an array.
Mon Dec 21 10:38:11 1998 Andrew Cagney <cagney@chook>
* mips-tdep.c: (MIPS_DEFAULT_FPU_TYPE): Default to
MIPS_FPU_DOUBLE.
1998-12-17 J.T. Conklin <jtc@redbacknetworks.com>
* blockframe.c (get_frame_saved_regs): If the saved_regs_addr ptr

32
gdb/values.c
View File

@ -910,15 +910,31 @@ value_virtual_fn_field (arg1p, f, j, type, offset)
/* The virtual function table is now an array of structures
which have the form { int16 offset, delta; void *pfn; }. */
vtbl = value_ind (value_primitive_field (arg1, 0,
TYPE_VPTR_FIELDNO (context),
TYPE_VPTR_BASETYPE (context)));
vtbl = value_primitive_field (arg1, 0, TYPE_VPTR_FIELDNO (context),
TYPE_VPTR_BASETYPE (context));
/* With older versions of g++, the vtbl field pointed to an array
of structures. Nowadays it points directly to the structure. */
if (TYPE_CODE (VALUE_TYPE (vtbl)) == TYPE_CODE_PTR
&& TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (vtbl))) == TYPE_CODE_ARRAY)
{
/* Handle the case where the vtbl field points to an
array of structures. */
vtbl = value_ind (vtbl);
/* Index into the virtual function table. This is hard-coded because
looking up a field is not cheap, and it may be important to save
time, e.g. if the user has set a conditional breakpoint calling
a virtual function. */
entry = value_subscript (vtbl, vi);
}
else
{
/* Handle the case where the vtbl field points directly to a structure. */
vtbl = value_add (vtbl, vi);
entry = value_ind (vtbl);
}
/* Index into the virtual function table. This is hard-coded because
looking up a field is not cheap, and it may be important to save
time, e.g. if the user has set a conditional breakpoint calling
a virtual function. */
entry = value_subscript (vtbl, vi);
entry_type = check_typedef (VALUE_TYPE (entry));
if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)