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Re: demangler, java, clinit, $E
- From: Ian Lance Taylor <ian at wasabisystems dot com>
- To: mec dot gnu at mindspring dot com (Michael Elizabeth Chastain)
- Cc: gdb at sources dot redhat dot com, tromey at redhat dot com
- Date: 16 Dec 2003 22:52:18 -0500
- Subject: Re: demangler, java, clinit, $E
- References: <20031217002907.3CA854B375@berman.michael-chastain.com>
mec.gnu@mindspring.com (Michael Elizabeth Chastain) writes:
> There are also 127 names which did not demangle at all, even with
> "--format java". This happens with both old and new demangler.
> These worry me. I have appended the list.
> DW.ref._ZN3org7eclipse3jdt4core8compiler21InvalidInputException6class$E
As far as I can tell, all the names which start with "DW.ref." are
created for debugging purposes. I don't really know why. See
dw2_force_const_mem() in gcc/dwarf2asm.c. My thinking right now is
that these names should not be demangled. They are not properly
mangled symbol names.
> _ZN3org3xml3sax7helpers11NewInstance6class$$EPN4java4lang6StringE
For some reason the Java mangler emits a '$' character after a member
name, if the name happens to be a C++ keyword with optional trailing
'$' characters. I don't know why it bothers to do this.
I think this patch should lead to a correct demangling.
Ian
Index: cp-demangle.c
===================================================================
RCS file: /cvs/src/src/libiberty/cp-demangle.c,v
retrieving revision 1.40
diff -u -p -r1.40 cp-demangle.c
--- cp-demangle.c 16 Dec 2003 00:58:42 -0000 1.40
+++ cp-demangle.c 17 Dec 2003 03:48:13 -0000
@@ -1334,6 +1343,12 @@ d_identifier (di, len)
name = d_str (di);
d_advance (di, len);
+ /* A Java mangled name may have a trailing '$' if it is a C++
+ keyword. We just ignore the '$'. */
+ if ((di->options & DMGL_JAVA) != 0
+ && d_peek_char (di) == '$')
+ d_advance (di, 1);
+
/* Look for something which looks like a gcc encoding of an
anonymous namespace, and replace it with a more user friendly
name. */