On Fri, 3 Mar 2023 at 17:01, Jakub Jelinek <ja...@redhat.com> wrote:
> 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)>
>
Here's a fix for that testcase:
--- a/gcc/gdbhooks.py
+++ b/gcc/gdbhooks.py
@@ -462,10 +462,13 @@ class VecPrinter:
m_vecpfx = self.gdbval['m_vecpfx']
m_num = m_vecpfx['m_num']
typ = self.gdbval.type
+ val = self.gdbval
if typ.code == gdb.TYPE_CODE_PTR:
typ = typ.target()
+ else:
+ val = val.address
typ = typ.template_argument(0) # the type T
- m_vecdata = (self.gdbval.address + 1).cast(typ.pointer())
+ m_vecdata = (val + 1).cast(typ.pointer())
for i in range(m_num):
yield ('[%d]' % i, m_vecdata[i])
