fe28be73c7
If lookup_symbol_file tries to locate a member variable with NULL name:
/* A simple lookup failed. Check if the symbol was defined in
a base class. */
cleanup = make_cleanup (null_cleanup, NULL);
/* Find the name of the class and the name of the method,
variable, etc. */
prefix_len = cp_entire_prefix_len (name);
/* If no prefix was found, search "this". */
if (prefix_len == 0)
{
struct type *type;
struct symbol *this;
this = lookup_language_this (language_def (language_cplus), block);
if (this == NULL)
{
do_cleanups (cleanup);
return NULL;
}
type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this)));
klass = xstrdup (TYPE_NAME (type));
nested = xstrdup (name);
}
TYPE_NAME (type) is NULL, so xstrdup (NULL) and boom!
This can happen, e.g., with clang++. See testsuite/gdb.cp/namelessclass.exp
or the bugzilla report.
This patch simply adds a fencepost against this case, allowing the caller
of lookup_symbol_file to search other blocks for the right symbol.
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2014 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This is the original source for namelessclass.S. This file is never
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compiled by the test suite, since the assembler output of clang++,
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namelessclass.S, is used instead. */
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class A
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{
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public:
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A () : a_ (0xbeef) {}
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int doit (void) {
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int ret = fudge ([this] () {
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return a_; // set breakpoint here
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});
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return ret;
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}
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private:
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template <typename Func>
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int fudge (Func func) { return func (); }
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int a_;
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};
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int
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main (void)
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{
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A a;
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return a.doit ();
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}
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