[Bug translator/4166] New: Assertion failure in c_translate_array

[Bug translator/4166] New: Assertion failure in c_translate_array

[dolmen at users dot sourceforge dot net]

% ./crash-c_translate_array.stp
stap: loc2c.c:1584: c_translate_array: Assertion `dwarf_tag (typedie) ==
DW_TAG_array_type' failed.
Aborted (core dumped)
% cat ./crash-c_translate_array.stp
#!/usr/bin/env stap

probe syscall.execve
{
  print($argv[0])
  exit()
}
% stap -V
SystemTap translator/driver (version 0.5.4 built 2006-02-02)
Copyright (C) 2005-2006 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
% cat /etc/redhat-release
Red Hat Enterprise Linux ES release 4 (Nahant Update 3)
% gcc -v
Reading specs from /usr/lib/gcc/x86_64-redhat-linux/3.4.5/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-java-awt=gtk --host=x86_64-redhat-linux
Thread model: posix
gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)
%

-- 
           Summary: Assertion failure in c_translate_array
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: dolmen at users dot sourceforge dot net


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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[Bug translator/4166] Assertion failure in c_translate_array

[roland at gnu dot org]

------- Additional Comments From roland at gnu dot org  2007-03-07 11:15 -------
The translator is responsible for checking Dwarf types and calling c_translate_*
with only the appropriate DIE flavor for each call.  To support C-style use of
pointers with array syntax, it needs to use c_translate_pointer+addressof, then
do its own arithmetic.  c_translate_array could be extended to do this for
DW_TAG_pointer, but still it looks like the translator is not checking types
before calling loc2c.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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[Bug translator/4166] Should support array-like indexing on $pointer variables

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2007-03-07 15:48 -------
A patch has been committed to produce a cleaner exception for this case
rather than an assertion failure.  However, the code does not support pointer
arithmetic yet, so I'll relabel this bug to track this enhancement.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Assertion failure in        |Should support array-like
                   |c_translate_array           |indexing on $pointer
                   |                            |variables


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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You are the assignee for the bug, or are watching the assignee.

[Bug translator/4166] Should support array-like indexing on $pointer variables

[fche at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|systemtap at sources dot    |mwielaard at redhat dot com
                   |redhat dot com              |
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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[Bug translator/4166] Should support array-like indexing on $pointer variables

[mwielaard at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|mwielaard at redhat dot com |systemtap at sources dot
                   |                            |redhat dot com
             Status|ASSIGNED                    |NEW


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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[Bug translator/4166] Should support array-like indexing on $pointer variables

[jistone at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|systemtap at sources dot    |jistone at redhat dot com
                   |redhat dot com              |
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=4166

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