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testing: probe gdb for supported architectures ahead of time
Currently when we encounter a gdb that is old or not built with multiarch in mind we fail rather messily. Try and improve the situation by probing ahead of time and setting HOST_GDB_SUPPORTS_ARCH=y in the relevant tcg configs. We can then skip and give a more meaningful message if we don't run the test. Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230302190846.2593720-24-alex.bennee@linaro.org> Message-Id: <20230303025805.625589-24-richard.henderson@linaro.org>
This commit is contained in:
Alex Bennée
parent
61b2e136db
commit
bcbc36a98f
@ -2747,6 +2747,7 @@ F: include/gdbstub/*
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F: gdb-xml/
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F: tests/tcg/multiarch/gdbstub/
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F: scripts/feature_to_c.sh
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F: scripts/probe-gdb-support.py
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Memory API
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M: Paolo Bonzini <pbonzini@redhat.com>
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8
configure
vendored
8
configure
vendored
@ -230,6 +230,7 @@ stack_protector=""
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safe_stack=""
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use_containers="yes"
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gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")
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gdb_arches=""
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if test -e "$source_path/.git"
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then
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@ -2395,6 +2396,7 @@ if test -n "$gdb_bin"; then
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gdb_version=$($gdb_bin --version | head -n 1)
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if version_ge ${gdb_version##* } 9.1; then
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echo "HAVE_GDB_BIN=$gdb_bin" >> $config_host_mak
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gdb_arches=$("$source_path/scripts/probe-gdb-support.py" $gdb_bin)
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else
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gdb_bin=""
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fi
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@ -2519,6 +2521,12 @@ for target in $target_list; do
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write_target_makefile "build-tcg-tests-$target" >> "$config_target_mak"
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echo "BUILD_STATIC=$build_static" >> "$config_target_mak"
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echo "QEMU=$PWD/$qemu" >> "$config_target_mak"
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# will GDB work with these binaries?
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if test "${gdb_arches#*$arch}" != "$gdb_arches"; then
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echo "HOST_GDB_SUPPORTS_ARCH=y" >> "$config_target_mak"
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fi
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echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> Makefile.prereqs
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tcg_tests_targets="$tcg_tests_targets $target"
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fi
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88
scripts/probe-gdb-support.py
Executable file
88
scripts/probe-gdb-support.py
Executable file
@ -0,0 +1,88 @@
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#!/usr/bin/env python3
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# coding: utf-8
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#
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# Probe gdb for supported architectures.
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#
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# This is required to support testing of the gdbstub as its hard to
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# handle errors gracefully during the test. Instead this script when
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# passed a GDB binary will probe its architecture support and return a
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# string of supported arches, stripped of guff.
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#
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# Copyright 2023 Linaro Ltd
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#
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# Author: Alex Bennée <alex.bennee@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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import argparse
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import re
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from subprocess import check_output, STDOUT
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# mappings from gdb arch to QEMU target
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mappings = {
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"alpha" : "alpha",
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"aarch64" : ["aarch64", "aarch64_be"],
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"armv7": "arm",
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"armv8-a" : ["aarch64", "aarch64_be"],
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"avr" : "avr",
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"cris" : "cris",
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# no hexagon in upstream gdb
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"hppa1.0" : "hppa",
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"i386" : "i386",
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"i386:x86-64" : "x86_64",
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"Loongarch64" : "loongarch64",
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"m68k" : "m68k",
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"MicroBlaze" : "microblaze",
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"mips:isa64" : ["mips64", "mips64el"],
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"nios2" : "nios2",
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"or1k" : "or1k",
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"powerpc:common" : "ppc",
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"powerpc:common64" : ["ppc64", "ppc64le"],
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"riscv:rv32" : "riscv32",
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"riscv:rv64" : "riscv64",
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"s390:64-bit" : "s390x",
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"sh4" : ["sh4", "sh4eb"],
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"sparc": "sparc",
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"sparc:v8plus": "sparc32plus",
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"sparc:v9a" : "sparc64",
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# no tricore in upstream gdb
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"xtensa" : ["xtensa", "xtensaeb"]
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}
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def do_probe(gdb):
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gdb_out = check_output([gdb,
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"-ex", "set architecture",
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"-ex", "quit"], stderr=STDOUT)
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m = re.search(r"Valid arguments are (.*)",
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gdb_out.decode("utf-8"))
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valid_arches = set()
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if m.group(1):
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for arch in m.group(1).split(", "):
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if arch in mappings:
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mapping = mappings[arch]
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if isinstance(mapping, str):
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valid_arches.add(mapping)
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else:
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for entry in mapping:
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valid_arches.add(entry)
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return valid_arches
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def main() -> None:
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parser = argparse.ArgumentParser(description='Probe GDB Architectures')
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parser.add_argument('gdb', help='Path to GDB binary.')
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args = parser.parse_args()
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supported = do_probe(args.gdb)
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print(" ".join(supported))
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if __name__ == '__main__':
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main()
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@ -81,7 +81,7 @@ sha512-vector: sha512.c
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TESTS += sha512-vector
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ifneq ($(HAVE_GDB_BIN),)
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ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
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GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
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run-gdbstub-sysregs: sysregs
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@ -64,6 +64,7 @@ run-test-mmap-%: test-mmap
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$(call run-test, test-mmap-$*, $(QEMU) -p $* $<, $< ($* byte pages))
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ifneq ($(HAVE_GDB_BIN),)
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ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
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GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
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run-gdbstub-sha1: sha1
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@ -87,6 +88,10 @@ run-gdbstub-thread-breakpoint: testthread
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--bin $< --test $(MULTIARCH_SRC)/gdbstub/test-thread-breakpoint.py, \
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hitting a breakpoint on non-main thread)
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else
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run-gdbstub-%:
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$(call skip-test, "gdbstub test $*", "no guest arch support")
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endif
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else
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run-gdbstub-%:
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$(call skip-test, "gdbstub test $*", "need working gdb")
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@ -15,6 +15,7 @@ MULTIARCH_TEST_SRCS=$(wildcard $(MULTIARCH_SYSTEM_SRC)/*.c)
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MULTIARCH_TESTS = $(patsubst $(MULTIARCH_SYSTEM_SRC)/%.c, %, $(MULTIARCH_TEST_SRCS))
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ifneq ($(HAVE_GDB_BIN),)
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ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
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GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
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run-gdbstub-memory: memory
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@ -26,7 +27,10 @@ run-gdbstub-memory: memory
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"-monitor none -display none -chardev file$(COMMA)path=$<.out$(COMMA)id=output $(QEMU_OPTS)" \
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--bin $< --test $(MULTIARCH_SRC)/gdbstub/memory.py, \
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softmmu gdbstub support)
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else
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run-gdbstub-%:
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$(call skip-test, "gdbstub test $*", "no guest arch support")
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endif
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else
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run-gdbstub-%:
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$(call skip-test, "gdbstub test $*", "need working gdb")
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@ -51,7 +51,7 @@ $(Z15_TESTS): CFLAGS+=-march=z15 -O2
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TESTS+=$(Z15_TESTS)
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endif
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ifneq ($(HAVE_GDB_BIN),)
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ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
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GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
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run-gdbstub-signals-s390x: signals-s390x
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