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.
52 lines
1.5 KiB
Text
52 lines
1.5 KiB
Text
# 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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#
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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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#
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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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# Test nameless, artificial classes that may be output by the compiler.
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# PR c++/16597
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load_lib dwarf.exp
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# Do not run in environments which do not support C++.
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if {[skip_cplus_tests]} {
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continue
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}
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# This test can only be run on x86-like targets which support DWARF.
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if {![dwarf2_support]} {
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return 0
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}
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if {![istarget "x86_64-*-*"] || ![is_lp64_target]} {
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return 0
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}
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standard_testfile .S
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set csrcfile "${testfile}.cc"
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if {[prepare_for_testing $testfile.exp $testfile $srcfile {nodebug}]} {
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return -1
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}
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if {![runto_main]} {
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return -1
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}
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# Set a breakpoint in the lambda in A::doit (). */
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set line [gdb_get_line_number "set breakpoint here" $csrcfile]
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gdb_breakpoint $line
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gdb_continue_to_breakpoint "continue to breakpoint at line $line"
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# Any output is accepted as valid as long as gdb does not segfault.
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gdb_test "print a_" ".*"
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