On Fri, Mar 03, 2023 at 05:45:59PM +0100, Jakub Jelinek via Gcc-patches wrote:
> On Fri, Mar 03, 2023 at 04:44:39PM +0000, Jonathan Wakely via Gcc-patches
> wrote:
> > OK for trunk?
> >
> > gcc/ChangeLog:
> >
>
> Please add
> PR middle-end/109006
> here
> > * gdbhooks.py (VecPrinter): Adjust for new vec layout.
>
> Ok with that, thanks.
Though, trying it on another vector it doesn't work in that case.
Testcase:
int
foo (void)
{
return 1;
}
gdb ./cc1 -quiet -O2 test.c
b pass_reassoc::execute
r
p debug_bb_n (2)
p $1->preds
(gdb) p $1->preds
$2 = 0x7fffea2d1f50 = {<error reading variable: Cannot access memory at address
0x100000058>}
(gdb) p $1->succs
$3 = 0x7fffea3010a0 = {<edge 0x0>}
But if I try to print it the hard way:
(gdb) p ((edge_def**)(&$1->preds.m_vecpfx+1))[0]
$4 = <edge 0x7fffea2fcdb0 (ENTRY -> 2)>
(gdb) p ((edge_def**)(&$1->succs.m_vecpfx+1))[0]
$5 = <edge 0x7fffea2fce70 (2 -> EXIT)>
> > diff --git a/gcc/gdbhooks.py b/gcc/gdbhooks.py
> > index c9dea9bf828..78e6c97c30d 100644
> > --- a/gcc/gdbhooks.py
> > +++ b/gcc/gdbhooks.py
> > @@ -461,7 +461,11 @@ class VecPrinter:
> > return
> > m_vecpfx = self.gdbval['m_vecpfx']
> > m_num = m_vecpfx['m_num']
> > - m_vecdata = self.gdbval['m_vecdata']
> > + typ = self.gdbval.type
> > + if typ.code == gdb.TYPE_CODE_PTR:
> > + typ = typ.target()
> > + typ = typ.template_argument(0) # the type T
> > + m_vecdata = (self.gdbval.address + 1).cast(typ.pointer())
> > for i in range(m_num):
> > yield ('[%d]' % i, m_vecdata[i])
Jakub
