Files
binutils-gdb/gdb/testsuite/gdb.cp/call-method-register.cc
Andrew Burgess f9f88aede3 gdb/testsuite: rewrite gdb.cp/call-method-register.exp with dwarf assembler
Convert the gdb.cp/call-method-register.exp test to make use of the
DWARF assembler.

The existing gdb.cp/call-method-register.exp test relies on a GCC
extension - forcing a local variable into a particular named register.

This means that the test will only work with Clang, and, as we have to
name the register into which the variable will be placed, will only
work for those targets where we've selected a suitable register,
currently this is x86-64, i386, and ppc64.

By switching to the DWARF assembler, the test will work with gcc and
clang, and should work on most, if not all, architectures.

The test creates a small structure, something that can fit within a
register, and then tries to call a method on the structure from within
GDB.  This should fail because GDB can't take the address of the in
register structure (for the `this` pointer).

As the test is for a failure case, then we don't really care _which_
register the structure is in, and I take advantage of this for the
DWARF assembler test, I just declare that the variable is in
DW_OP_reg0, whatever that might be.  I've tested the new test on
x86-64, ppc, aarch64, and risc-v, and the test runs, and passes on all
these architectures, which is already more than we used to cover.

Additionally, on x86-64, I've tested with Clang and gcc, and the test
runs and passed with both compilers.

Reviewed-By: Lancelot SIX <lancelot.six@amd.com>
2022-11-18 11:21:37 +00:00

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818 B
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/* This testcase is part of GDB, the GNU debugger.
Copyright 2022 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
int
main ()
{
asm ("main_label: .globl main_label");
return 0;
}