From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-prs-return-16986-listarch-gdb-prs=sources.redhat.com@sourceware.org>
Received: (qmail 10901 invoked by alias); 11 Nov 2014 18:44:15 -0000
Mailing-List: contact gdb-prs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <gdb-prs.sourceware.org>
List-Subscribe: <mailto:gdb-prs-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb-prs/>
List-Post: <mailto:gdb-prs@sourceware.org>
List-Help: <mailto:gdb-prs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: gdb-prs-owner@sourceware.org
Received: (qmail 10851 invoked by uid 48); 11 Nov 2014 18:44:14 -0000
From: "tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug breakpoints/17579] New: can't set breakpoint using demangled
 name
Date: Tue, 11 Nov 2014 18:44:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gdb
X-Bugzilla-Component: breakpoints
X-Bugzilla-Version: HEAD
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: tromey at sourceware dot org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter
Message-ID: <bug-17579-4717@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-q4/txt/msg00229.txt.bz2

https://sourceware.org/bugzilla/show_bug.cgi?id=17579

            Bug ID: 17579
           Summary: can't set breakpoint using demangled name
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: breakpoints
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at sourceware dot org

I'm afraid I don't have a simple reproducer for this.

I built firefox trunk ("mozilla-central") with debugging
enabled and optimization disabled.  Then I started
gdb on libxul.so.

Next I tried to set a breakpoint:

(gdb) break
'js::baseops::SetPropertyHelper<(js::ExecutionMode)1>(js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType,
JS::Handle<js::NativeObject*>, JS::Handle<JSObject*>, JS::Handle<jsid>,
js::baseops::QualifiedBool, JS::MutableHandle<JS::Value>, bool)' 

(I actually did this via TAB completion, so I know gdb knows
about this symbol...)
However gdb doesn't like it:

Function
"js::baseops::SetPropertyHelper<(js::ExecutionMode)1>(js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType,
JS::Handle<js::NativeObject*>, JS::Handle<JSObject*>, JS::Handle<jsid>,
js::baseops::QualifiedBool, JS::MutableHandle<JS::Value>, bool)" not defined.
Make breakpoint pending on future shared library load? (y or [n]) n


But the symbol is definitely defined.  In fact I can print it
and disassemble the address:

(gdb) p
'js::baseops::SetPropertyHelper<(js::ExecutionMode)1>(js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType,
JS::Handle<js::NativeObject*>, JS::Handle<JSObject*>, JS::Handle<jsid>,
js::baseops::QualifiedBool, JS::MutableHandle<JS::Value>, bool)' 
$1 = {bool (js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType, 
    js::HandleNativeObject, JS::HandleObject, JS::HandleId, 
    js::baseops::QualifiedBool, JS::MutableHandleValue, 
    bool)} 0x558389d
<js::baseops::SetPropertyHelper<(js::ExecutionMode)1>(js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType,
JS::Handle<js::NativeObject*>, JS::Handle<JSObject*>, JS::Handle<jsid>,
js::baseops::QualifiedBool, JS::MutableHandle<JS::Value>, bool)>

(gdb) disassemble 0x558389d
Dump of assembler code for function
js::baseops::SetPropertyHelper<(js::ExecutionMode)1>(js::ExecutionModeTraits<(js::ExecutionMode)1>::ContextType,
JS::Handle<js::NativeObject*>, JS::Handle<JSObject*>, JS::Handle<jsid>,
js::baseops::QualifiedBool, JS::MutableHandle<JS::Value>, bool):
   0x000000000558389d <+0>:    push   %rbp
   0x000000000558389e <+1>:    mov    %rsp,%rbp
   0x00000000055838a1 <+4>:    push   %r12
   0x00000000055838a3 <+6>:    push   %rbx
[...]


Setting the breakpoint works fine if I use the mangled name or
file:line.

-- 
You are receiving this mail because:
You are on the CC list for the bug.