[PATCH][gdb/symtab] Handle invalid partial DIE reference

classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|

[PATCH][gdb/symtab] Handle invalid partial DIE reference

Tom de Vries
Hi,

When reverting commit 9cfd2b89bd "[gdb/testsuite] Fix
gdb.arch/amd64-entry-value-paramref.S", we run into an internal-error:
...
(gdb) file amd64-entry-value-paramref^M
Reading symbols from amd64-entry-value-paramref...^M
src/gdb/dwarf2/read.c:18903: internal-error: could not find partial DIE
  0x1b7 in cache [from module amd64-entry-value-paramref]^M

A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
...
because of invalid dwarf.

In contrast, when using -readnow, we have:
...
(gdb) file -readnow amd64-entry-value-paramref
Reading symbols from amd64-entry-value-paramref...
Expanding full symbols from amd64-entry-value-paramref...
Dwarf Error: Cannot find DIE at 0x1b7 referenced from DIE at 0x11a \
  [in module amd64-entry-value-paramref]
(gdb)
...

Change the internal error into a Dwarf Error, such that we have:
...
(gdb) file amd64-entry-value-paramref^M
Reading symbols from amd64-entry-value-paramref...^M
Dwarf Error: Cannot not find DIE at 0x1b7 \
  [from module amd64-entry-value-paramref]^M
^M
(No debugging symbols found in amd64-entry-value-paramref)^M
(gdb)
...

Build and tested on x86_64-linux.

Any comments?

Thanks,
- Tom

[gdb/symtab] Handle invalid partial DIE reference

gdb/ChangeLog:

2020-07-24  Tom de Vries  <[hidden email]>

        PR symtab/23270
        * dwarf2/read.c (find_partial_die): Change internal error into Dwarf
        Error.

---
 gdb/dwarf2/read.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 39ed455def..7726f193da 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -18900,9 +18900,7 @@ find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu)
     }
 
   if (pd == NULL)
-    internal_error (__FILE__, __LINE__,
-    _("could not find partial DIE %s "
-      "in cache [from module %s]\n"),
+    error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"),
     sect_offset_str (sect_off), bfd_get_filename (objfile->obfd));
   return { cu, pd };
 }
Reply | Threaded
Open this post in threaded view
|

[committed][gdb/symtab] Handle invalid partial DIE reference

Tom de Vries
On 7/24/20 12:52 PM, Tom de Vries wrote:

> Hi,
>
> When reverting commit 9cfd2b89bd "[gdb/testsuite] Fix
> gdb.arch/amd64-entry-value-paramref.S", we run into an internal-error:
> ...
> (gdb) file amd64-entry-value-paramref^M
> Reading symbols from amd64-entry-value-paramref...^M
> src/gdb/dwarf2/read.c:18903: internal-error: could not find partial DIE
>   0x1b7 in cache [from module amd64-entry-value-paramref]^M
>
> A problem internal to GDB has been detected,^M
> further debugging may prove unreliable.^M
> ...
> because of invalid dwarf.
>
> In contrast, when using -readnow, we have:
> ...
> (gdb) file -readnow amd64-entry-value-paramref
> Reading symbols from amd64-entry-value-paramref...
> Expanding full symbols from amd64-entry-value-paramref...
> Dwarf Error: Cannot find DIE at 0x1b7 referenced from DIE at 0x11a \
>   [in module amd64-entry-value-paramref]
> (gdb)
> ...
>
> Change the internal error into a Dwarf Error, such that we have:
> ...
> (gdb) file amd64-entry-value-paramref^M
> Reading symbols from amd64-entry-value-paramref...^M
> Dwarf Error: Cannot not find DIE at 0x1b7 \
>   [from module amd64-entry-value-paramref]^M
> ^M
> (No debugging symbols found in amd64-entry-value-paramref)^M
> (gdb)
> ...
>
> Build and tested on x86_64-linux.
>
> Any comments?
>

Pushed.

Thanks,
- Tom

> [gdb/symtab] Handle invalid partial DIE reference
>
> gdb/ChangeLog:
>
> 2020-07-24  Tom de Vries  <[hidden email]>
>
> PR symtab/23270
> * dwarf2/read.c (find_partial_die): Change internal error into Dwarf
> Error.
>
> ---
>  gdb/dwarf2/read.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
> index 39ed455def..7726f193da 100644
> --- a/gdb/dwarf2/read.c
> +++ b/gdb/dwarf2/read.c
> @@ -18900,9 +18900,7 @@ find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu)
>      }
>  
>    if (pd == NULL)
> -    internal_error (__FILE__, __LINE__,
> -    _("could not find partial DIE %s "
> -      "in cache [from module %s]\n"),
> +    error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"),
>      sect_offset_str (sect_off), bfd_get_filename (objfile->obfd));
>    return { cu, pd };
>  }
>