[Bug python/10805] New: GDB Type.fields() crashes on non-struct/class types

[Bug python/10805] New: GDB Type.fields() crashes on non-struct/class types

[pmuldoon at redhat dot com]

Daniel Jacobowitz wrote about some Python/GDB experiences and bugs in the email:

http://sourceware.org/ml/archer/2009-q4/msg00008.html

This bug (and others in their own bugs) is extracted from that email to track
the issue:

* Calling type.fields on an array type crashes.  It accesses
TYPE_N_BASECLASSES; cplus_stuff isn't allocated for non-structs.

-- 
           Summary: GDB Type.fields() crashes on non-struct/class types
           Product: gdb
           Version: archer
            Status: UNCONFIRMED
          Severity: normal
          Priority: P1
         Component: python
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: pmuldoon at redhat dot com
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=10805

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[Bug python/10805] GDB Type.fields() crashes on non-struct/class types

[drow at sources dot redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |drow at sources dot redhat
                   |                            |dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10805

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[Bug python/10805] GDB Type.fields() crashes on non-struct/class types

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2009-10-20 10:12 -------
This is what I see currently in both FSF HEAD and archer-tromey-python branch:

37	  return 0;      /* break to inspect struct and union */

(gdb) p st
$2 = {
  a = 3, 
  b = 5
}
(gdb) python st = gdb.history(0)
(gdb) py print st
{
  a = 3, 
  b = 5
}
(gdb) p ar
$3 = {1, 2}
(gdb) py ar = gdb.history (0)
(gdb) py print ar
{1, 2}
(gdb) python fields = st.type.fields()
(gdb) py print fields[0].name
a
(gdb) py print fields[1].name
b
(gdb) python fields = ar.type.fields()
Segmentation fault (core dumped)


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at sourceware dot|pmuldoon at redhat dot com
                   |org                         |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|                            |1


http://sourceware.org/bugzilla/show_bug.cgi?id=10805

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[Bug python/10805] GDB Type.fields() crashes on non-struct/class types

[andre dot poenitz at nokia dot com]

------- Additional Comments From andre dot poenitz at nokia dot com  2009-10-22 09:01 -------
*** Bug 10827 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andre dot poenitz at nokia
                   |                            |dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10805

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[Bug python/10805] GDB Type.fields() crashes on non-struct/class types

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2009-11-09 08:24 -------
A patch was submitted here:

http://sourceware.org/ml/archer/2009-q4/msg00016.html

Reviewed and approved here:

http://sourceware.org/ml/archer/2009-q4/msg00032.html

And checked in with commit id (dad6b53fe4a6df586dcd0a57e2151e7663191f18)  here:

http://sourceware.org/ml/archer-commits/2009-q4/msg00018.html

As this is archer-tromey-python only functionality, it has not been committed to
GDB upstream. There is a discussion on committing it.



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=10805

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[Bug python/10805] GDB Type.fields() crashes on non-struct/class types

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2009-12-03 21:20 -------
Subject: Bug 10805

CVSROOT:	/cvs/src
Module name:	src
Changes by:	pmuldoon@sourceware.org	2009-12-03 21:19:49

Modified files:
	gdb            : ChangeLog 
	gdb/doc        : ChangeLog gdb.texinfo 
	gdb/python     : py-type.c 
	gdb/testsuite  : ChangeLog 
	gdb/testsuite/gdb.python: Makefile.in 
Added files:
	gdb/testsuite/gdb.python: py-type.c py-type.exp 

Log message:
	2009-12-03  Richard Ward  <richard.j.ward1@googlemail.com>
	
	* python/py-type.c (convert_field): New attribute "is_base_class".
	
	doc/
	
	2009-12-03  Richard Ward  <richard.j.ward1@googlemail.com>
	
	* gdb.texinfo (Types In Python): Describe "is_base_class".
	
	testsuite/
	
	2009-12-03  Phil Muldoon <pmuldoon@redhat.com>
	
	PR python/10805
	
	* gdb.python/py-type.exp: New file.
	* gdb.python/py-type.c: New file.
	* Makefile.in: Add py-type.

Patches:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.11128&r2=1.11129
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/doc/ChangeLog.diff?cvsroot=src&r1=1.978&r2=1.979
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/doc/gdb.texinfo.diff?cvsroot=src&r1=1.646&r2=1.647
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/python/py-type.c.diff?cvsroot=src&r1=1.2&r2=1.3
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/testsuite/ChangeLog.diff?cvsroot=src&r1=1.2044&r2=1.2045
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.python/py-type.c.diff?cvsroot=src&r1=NONE&r2=1.1
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.python/py-type.exp.diff?cvsroot=src&r1=NONE&r2=1.1
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.python/Makefile.in.diff?cvsroot=src&r1=1.2&r2=1.3



-- 


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