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authorStefan Hajnoczi <stefanha@redhat.com>2025-02-10 13:26:17 -0500
committerStefan Hajnoczi <stefanha@redhat.com>2025-02-10 13:26:17 -0500
commitffaf7f0376f8040ce9068d71ae9ae8722505c42e (patch)
treec84be244b60ee3e1f96cb858bad1a1589a586c98 /tests
parentf2ec48fefd172a8dd20cb0073087d659aca9578c (diff)
parent24c61663dcec0e87bb4206a7623f0e222e188b47 (diff)
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Merge tag 'pull-10.0-testing-and-gdstub-updates-100225-1' of https://gitlab.com/stsquad/qemu into staging
testing and gdbstub updates: - add a check-rust test to docker builds - re-factor the qtest logic to be cleaner - fix tests to not clock_step when no timers enabled - roll-up log prefix into qtest_send - cleaner error reporting when qtest_clock_set fails - revert old deadlock fix now tests are updated - only run full set of migration tests under HW acceleration - support late attachment to user-mode gdbstubs # -----BEGIN PGP SIGNATURE----- # # iQEzBAABCgAdFiEEZoWumedRZ7yvyN81+9DbCVqeKkQFAmeqBSsACgkQ+9DbCVqe # KkQS/Af+K0hpdGc1msiuMsqmuESBvhoQniYZFLN1/pwe2KpG8i/+fq2fsCuxJhJ1 # 2TzPH7aj54p9MGCZf2k9JLhO22XldN+oezZMc1crhoWK0AtrWhnLs58I2oEPIsUo # NmGO6Zfm98ge89o2y8GCvd0QXAtUf+jduDKnW0mfnOnw+w/mky5KzWS7/1091VGW # 42LSY4KnqgdLSqLyuLBOrgADEjB1ChWS4/bSC+kEYSGrmNQB+n1KeIzzlJBGpOr0 # Z9yzmhMCm7TWdkFNPmnVfYH/7ZUNcpv6PtQSpkku4f6b/gybyvJBknHpM4i+Gpb5 # 87wSjljrCpdNm/9KFRjiJuUWdS/jCg== # =UF0n # -----END PGP SIGNATURE----- # gpg: Signature made Mon 10 Feb 2025 08:54:51 EST # gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44 # gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown] # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44 * tag 'pull-10.0-testing-and-gdstub-updates-100225-1' of https://gitlab.com/stsquad/qemu: tests/tcg: Add late gdbstub attach test docs/user: Document the %d placeholder and suspend=n QEMU_GDB features gdbstub: Allow late attachment osdep: Introduce qemu_kill_thread() user: Introduce host_interrupt_signal user: Introduce user/signal.h gdbstub: Try unlinking the unix socket before binding gdbstub: Allow the %d placeholder in the socket path tests/qtest/migration: Pick smoke tests tests/qtest/migration: Add --full option Revert "util/timer: avoid deadlock when shutting down" tests/qtest: tighten up the checks on clock_step tests/qtest: rename qtest_send_prefix and roll-up into qtest_send tests/qtest: simplify qtest_process_inbuf tests/qtest: don't step clock at start of npcm7xx periodic IRQ test tests/qtest: don't attempt to clock_step while waiting for virtio ISR tests/docker: replicate the check-rust-tools-nightly CI job Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests')
-rw-r--r--tests/docker/Makefile.include3
-rwxr-xr-xtests/docker/test-rust21
-rwxr-xr-xtests/guest-debug/run-test.py15
-rw-r--r--tests/qtest/libqos/virtio-pci-modern.c6
-rw-r--r--tests/qtest/libqos/virtio-pci.c6
-rw-r--r--tests/qtest/meson.build11
-rw-r--r--tests/qtest/migration-test.c25
-rw-r--r--tests/qtest/migration/compression-tests.c15
-rw-r--r--tests/qtest/migration/cpr-tests.c6
-rw-r--r--tests/qtest/migration/file-tests.c19
-rw-r--r--tests/qtest/migration/framework.h1
-rw-r--r--tests/qtest/migration/misc-tests.c16
-rw-r--r--tests/qtest/migration/postcopy-tests.c14
-rw-r--r--tests/qtest/migration/precopy-tests.c23
-rw-r--r--tests/qtest/migration/tls-tests.c14
-rw-r--r--tests/qtest/npcm7xx_timer-test.c1
-rw-r--r--tests/tcg/multiarch/Makefile.target9
-rw-r--r--tests/tcg/multiarch/gdbstub/late-attach.py28
-rw-r--r--tests/tcg/multiarch/late-attach.c41
19 files changed, 240 insertions, 34 deletions
diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index fead7d3..fa1cbb6 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -236,3 +236,6 @@ docker-image: ${DOCKER_IMAGES:%=docker-image-%}
docker-clean:
$(call quiet-command, $(DOCKER_SCRIPT) clean)
+
+# Overrides
+docker-test-rust%: NETWORK=1
diff --git a/tests/docker/test-rust b/tests/docker/test-rust
new file mode 100755
index 0000000..e7e3e94
--- /dev/null
+++ b/tests/docker/test-rust
@@ -0,0 +1,21 @@
+#!/bin/bash -e
+#
+# Run the rust code checks (a.k.a. check-rust-tools-nightly)
+#
+# Copyright (c) 2025 Linaro Ltd
+#
+# Authors:
+# Alex Bennée <alex.bennee@linaro.org>
+#
+# This work is licensed under the terms of the GNU GPL, version 2
+# or (at your option) any later version. See the COPYING file in
+# the top-level directory.
+
+. common.rc
+
+cd "$BUILD_DIR"
+
+configure_qemu --disable-user --disable-docs --enable-rust
+pyvenv/bin/meson devenv -w $QEMU_SRC/rust ${CARGO-cargo} fmt --check
+make clippy
+make rustdoc
diff --git a/tests/guest-debug/run-test.py b/tests/guest-debug/run-test.py
index 5a091db..75e9c92 100755
--- a/tests/guest-debug/run-test.py
+++ b/tests/guest-debug/run-test.py
@@ -36,6 +36,8 @@ def get_args():
parser.add_argument("--gdb-args", help="Additional gdb arguments")
parser.add_argument("--output", help="A file to redirect output to")
parser.add_argument("--stderr", help="A file to redirect stderr to")
+ parser.add_argument("--no-suspend", action="store_true",
+ help="Ask the binary to not wait for GDB connection")
return parser.parse_args()
@@ -73,10 +75,19 @@ if __name__ == '__main__':
# Launch QEMU with binary
if "system" in args.qemu:
+ if args.no_suspend:
+ suspend = ''
+ else:
+ suspend = ' -S'
cmd = f'{args.qemu} {args.qargs} {args.binary}' \
- f' -S -gdb unix:path={socket_name},server=on'
+ f'{suspend} -gdb unix:path={socket_name},server=on'
else:
- cmd = f'{args.qemu} {args.qargs} -g {socket_name} {args.binary}'
+ if args.no_suspend:
+ suspend = ',suspend=n'
+ else:
+ suspend = ''
+ cmd = f'{args.qemu} {args.qargs} -g {socket_name}{suspend}' \
+ f' {args.binary}'
log(output, "QEMU CMD: %s" % (cmd))
inferior = subprocess.Popen(shlex.split(cmd))
diff --git a/tests/qtest/libqos/virtio-pci-modern.c b/tests/qtest/libqos/virtio-pci-modern.c
index 18d1188..4e67fcb 100644
--- a/tests/qtest/libqos/virtio-pci-modern.c
+++ b/tests/qtest/libqos/virtio-pci-modern.c
@@ -173,13 +173,11 @@ static bool get_config_isr_status(QVirtioDevice *d)
static void wait_config_isr_status(QVirtioDevice *d, gint64 timeout_us)
{
- QVirtioPCIDevice *dev = container_of(d, QVirtioPCIDevice, vdev);
gint64 start_time = g_get_monotonic_time();
- do {
+ while (!get_config_isr_status(d)) {
g_assert(g_get_monotonic_time() - start_time <= timeout_us);
- qtest_clock_step(dev->pdev->bus->qts, 100);
- } while (!get_config_isr_status(d));
+ }
}
static void queue_select(QVirtioDevice *d, uint16_t index)
diff --git a/tests/qtest/libqos/virtio-pci.c b/tests/qtest/libqos/virtio-pci.c
index 485b8f6..002bf8b 100644
--- a/tests/qtest/libqos/virtio-pci.c
+++ b/tests/qtest/libqos/virtio-pci.c
@@ -171,13 +171,11 @@ static bool qvirtio_pci_get_config_isr_status(QVirtioDevice *d)
static void qvirtio_pci_wait_config_isr_status(QVirtioDevice *d,
gint64 timeout_us)
{
- QVirtioPCIDevice *dev = container_of(d, QVirtioPCIDevice, vdev);
gint64 start_time = g_get_monotonic_time();
- do {
+ while (!qvirtio_pci_get_config_isr_status(d)) {
g_assert(g_get_monotonic_time() - start_time <= timeout_us);
- qtest_clock_step(dev->pdev->bus->qts, 100);
- } while (!qvirtio_pci_get_config_isr_status(d));
+ }
}
static void qvirtio_pci_queue_select(QVirtioDevice *d, uint16_t index)
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 5e062c7..68316db 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -405,6 +405,8 @@ foreach dir : target_dirs
target_base = dir.split('-')[0]
qtest_emulator = emulators['qemu-system-' + target_base]
target_qtests = get_variable('qtests_' + target_base, []) + qtests_generic
+ has_kvm = ('CONFIG_KVM' in config_all_accel and host_os == 'linux'
+ and cpu == target_base and fs.exists('/dev/kvm'))
test_deps = roms
qtest_env = environment()
@@ -438,11 +440,18 @@ foreach dir : target_dirs
test: executable(test, src, dependencies: deps)
}
endif
+
+ test_args = ['--tap', '-k']
+
+ if test == 'migration-test' and has_kvm
+ test_args += ['--full']
+ endif
+
test('qtest-@0@/@1@'.format(target_base, test),
qtest_executables[test],
depends: [test_deps, qtest_emulator, emulator_modules],
env: qtest_env,
- args: ['--tap', '-k'],
+ args: test_args,
protocol: 'tap',
timeout: slow_qtests.get(test, 60),
priority: slow_qtests.get(test, 60),
diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 5cad506..0893687 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -14,13 +14,38 @@
#include "migration/framework.h"
#include "qemu/module.h"
+static void parse_args(int *argc_p, char ***argv_p, bool *full_set)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int i, j;
+
+ j = 1;
+ for (i = 1; i < argc; i++) {
+ if (g_str_equal(argv[i], "--full")) {
+ *full_set = true;
+ continue;
+ }
+ argv[j++] = argv[i];
+ if (i >= j) {
+ argv[i] = NULL;
+ }
+ }
+ *argc_p = j;
+}
+
int main(int argc, char **argv)
{
MigrationTestEnv *env;
int ret;
+ bool full_set = false;
+
+ /* strip the --full option if it's present */
+ parse_args(&argc, &argv, &full_set);
g_test_init(&argc, &argv, NULL);
env = migration_get_env();
+ env->full_set = full_set;
module_call_init(MODULE_INIT_QOM);
migration_test_add_tls(env);
diff --git a/tests/qtest/migration/compression-tests.c b/tests/qtest/migration/compression-tests.c
index d78f1f1..8b58401 100644
--- a/tests/qtest/migration/compression-tests.c
+++ b/tests/qtest/migration/compression-tests.c
@@ -151,10 +151,22 @@ static void test_multifd_tcp_zlib(void)
test_precopy_common(&args);
}
+static void migration_test_add_compression_smoke(MigrationTestEnv *env)
+{
+ migration_test_add("/migration/multifd/tcp/plain/zlib",
+ test_multifd_tcp_zlib);
+}
+
void migration_test_add_compression(MigrationTestEnv *env)
{
tmpfs = env->tmpfs;
+ migration_test_add_compression_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
+
#ifdef CONFIG_ZSTD
migration_test_add("/migration/multifd/tcp/plain/zstd",
test_multifd_tcp_zstd);
@@ -179,7 +191,4 @@ void migration_test_add_compression(MigrationTestEnv *env)
migration_test_add("/migration/precopy/unix/xbzrle",
test_precopy_unix_xbzrle);
}
-
- migration_test_add("/migration/multifd/tcp/plain/zlib",
- test_multifd_tcp_zlib);
}
diff --git a/tests/qtest/migration/cpr-tests.c b/tests/qtest/migration/cpr-tests.c
index 215b0df..4758841 100644
--- a/tests/qtest/migration/cpr-tests.c
+++ b/tests/qtest/migration/cpr-tests.c
@@ -104,6 +104,12 @@ void migration_test_add_cpr(MigrationTestEnv *env)
{
tmpfs = env->tmpfs;
+ /* no tests in the smoke set for now */
+
+ if (!env->full_set) {
+ return;
+ }
+
/*
* Our CI system has problems with shared memory.
* Don't run this test until we find a workaround.
diff --git a/tests/qtest/migration/file-tests.c b/tests/qtest/migration/file-tests.c
index 6400ddc..f260e28 100644
--- a/tests/qtest/migration/file-tests.c
+++ b/tests/qtest/migration/file-tests.c
@@ -300,12 +300,24 @@ static void test_multifd_file_mapped_ram_fdset_dio(void)
}
#endif /* !_WIN32 */
+static void migration_test_add_file_smoke(MigrationTestEnv *env)
+{
+ migration_test_add("/migration/precopy/file",
+ test_precopy_file);
+
+ migration_test_add("/migration/multifd/file/mapped-ram/dio",
+ test_multifd_file_mapped_ram_dio);
+}
+
void migration_test_add_file(MigrationTestEnv *env)
{
tmpfs = env->tmpfs;
- migration_test_add("/migration/precopy/file",
- test_precopy_file);
+ migration_test_add_file_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
migration_test_add("/migration/precopy/file/offset",
test_precopy_file_offset);
@@ -326,9 +338,6 @@ void migration_test_add_file(MigrationTestEnv *env)
migration_test_add("/migration/multifd/file/mapped-ram/live",
test_multifd_file_mapped_ram_live);
- migration_test_add("/migration/multifd/file/mapped-ram/dio",
- test_multifd_file_mapped_ram_dio);
-
#ifndef _WIN32
migration_test_add("/migration/multifd/file/mapped-ram/fdset",
test_multifd_file_mapped_ram_fdset);
diff --git a/tests/qtest/migration/framework.h b/tests/qtest/migration/framework.h
index cb4a984..e4a1187 100644
--- a/tests/qtest/migration/framework.h
+++ b/tests/qtest/migration/framework.h
@@ -24,6 +24,7 @@ typedef struct MigrationTestEnv {
bool uffd_feature_thread_id;
bool has_dirty_ring;
bool is_x86;
+ bool full_set;
const char *arch;
const char *qemu_src;
const char *qemu_dst;
diff --git a/tests/qtest/migration/misc-tests.c b/tests/qtest/migration/misc-tests.c
index 04e5a47..2e612d9 100644
--- a/tests/qtest/migration/misc-tests.c
+++ b/tests/qtest/migration/misc-tests.c
@@ -258,14 +258,24 @@ static void test_validate_uri_channels_none_set(void)
do_test_validate_uri_channel(&args);
}
+static void migration_test_add_misc_smoke(MigrationTestEnv *env)
+{
+#ifndef _WIN32
+ migration_test_add("/migration/analyze-script", test_analyze_script);
+#endif
+}
+
void migration_test_add_misc(MigrationTestEnv *env)
{
tmpfs = env->tmpfs;
+ migration_test_add_misc_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
+
migration_test_add("/migration/bad_dest", test_baddest);
-#ifndef _WIN32
- migration_test_add("/migration/analyze-script", test_analyze_script);
-#endif
/*
* Our CI system has problems with shared memory.
diff --git a/tests/qtest/migration/postcopy-tests.c b/tests/qtest/migration/postcopy-tests.c
index 59e8c12..982457b 100644
--- a/tests/qtest/migration/postcopy-tests.c
+++ b/tests/qtest/migration/postcopy-tests.c
@@ -79,7 +79,7 @@ static void test_postcopy_preempt_recovery(void)
test_postcopy_recovery_common(&args);
}
-void migration_test_add_postcopy(MigrationTestEnv *env)
+static void migration_test_add_postcopy_smoke(MigrationTestEnv *env)
{
if (env->has_uffd) {
migration_test_add("/migration/postcopy/plain", test_postcopy);
@@ -87,6 +87,18 @@ void migration_test_add_postcopy(MigrationTestEnv *env)
test_postcopy_recovery);
migration_test_add("/migration/postcopy/preempt/plain",
test_postcopy_preempt);
+ }
+}
+
+void migration_test_add_postcopy(MigrationTestEnv *env)
+{
+ migration_test_add_postcopy_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
+
+ if (env->has_uffd) {
migration_test_add("/migration/postcopy/preempt/recovery/plain",
test_postcopy_preempt_recovery);
diff --git a/tests/qtest/migration/precopy-tests.c b/tests/qtest/migration/precopy-tests.c
index 7d6d4f5..162fa69 100644
--- a/tests/qtest/migration/precopy-tests.c
+++ b/tests/qtest/migration/precopy-tests.c
@@ -951,10 +951,8 @@ static void test_dirty_limit(void)
migrate_end(from, to, true);
}
-void migration_test_add_precopy(MigrationTestEnv *env)
+static void migration_test_add_precopy_smoke(MigrationTestEnv *env)
{
- tmpfs = env->tmpfs;
-
if (env->is_x86) {
migration_test_add("/migration/precopy/unix/suspend/live",
test_precopy_unix_suspend_live);
@@ -966,6 +964,21 @@ void migration_test_add_precopy(MigrationTestEnv *env)
test_precopy_unix_plain);
migration_test_add("/migration/precopy/tcp/plain", test_precopy_tcp_plain);
+ migration_test_add("/migration/multifd/tcp/uri/plain/none",
+ test_multifd_tcp_uri_none);
+ migration_test_add("/migration/multifd/tcp/plain/cancel",
+ test_multifd_tcp_cancel);
+}
+
+void migration_test_add_precopy(MigrationTestEnv *env)
+{
+ tmpfs = env->tmpfs;
+
+ migration_test_add_precopy_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
migration_test_add("/migration/precopy/tcp/plain/switchover-ack",
test_precopy_tcp_switchover_ack);
@@ -989,16 +1002,12 @@ void migration_test_add_precopy(MigrationTestEnv *env)
test_dirty_limit);
}
}
- migration_test_add("/migration/multifd/tcp/uri/plain/none",
- test_multifd_tcp_uri_none);
migration_test_add("/migration/multifd/tcp/channels/plain/none",
test_multifd_tcp_channels_none);
migration_test_add("/migration/multifd/tcp/plain/zero-page/legacy",
test_multifd_tcp_zero_page_legacy);
migration_test_add("/migration/multifd/tcp/plain/zero-page/none",
test_multifd_tcp_no_zero_page);
- migration_test_add("/migration/multifd/tcp/plain/cancel",
- test_multifd_tcp_cancel);
if (g_str_equal(env->arch, "x86_64")
&& env->has_kvm && env->has_dirty_ring) {
diff --git a/tests/qtest/migration/tls-tests.c b/tests/qtest/migration/tls-tests.c
index 5704a1f..2cb4a44 100644
--- a/tests/qtest/migration/tls-tests.c
+++ b/tests/qtest/migration/tls-tests.c
@@ -722,10 +722,22 @@ static void test_multifd_tcp_tls_x509_reject_anon_client(void)
}
#endif /* CONFIG_TASN1 */
+static void migration_test_add_tls_smoke(MigrationTestEnv *env)
+{
+ migration_test_add("/migration/precopy/tcp/tls/psk/match",
+ test_precopy_tcp_tls_psk_match);
+}
+
void migration_test_add_tls(MigrationTestEnv *env)
{
tmpfs = env->tmpfs;
+ migration_test_add_tls_smoke(env);
+
+ if (!env->full_set) {
+ return;
+ }
+
migration_test_add("/migration/precopy/unix/tls/psk",
test_precopy_unix_tls_psk);
@@ -751,8 +763,6 @@ void migration_test_add_tls(MigrationTestEnv *env)
test_precopy_unix_tls_x509_override_host);
#endif /* CONFIG_TASN1 */
- migration_test_add("/migration/precopy/tcp/tls/psk/match",
- test_precopy_tcp_tls_psk_match);
migration_test_add("/migration/precopy/tcp/tls/psk/mismatch",
test_precopy_tcp_tls_psk_mismatch);
#ifdef CONFIG_TASN1
diff --git a/tests/qtest/npcm7xx_timer-test.c b/tests/qtest/npcm7xx_timer-test.c
index 58f58c2..4371104 100644
--- a/tests/qtest/npcm7xx_timer-test.c
+++ b/tests/qtest/npcm7xx_timer-test.c
@@ -465,7 +465,6 @@ static void test_periodic_interrupt(gconstpointer test_data)
int i;
tim_reset(td);
- clock_step_next();
tim_write_ticr(td, count);
tim_write_tcsr(td, CEN | IE | MODE_PERIODIC | PRESCALE(ps));
diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Makefile.target
index 18d3cf4..688a6be 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -130,6 +130,13 @@ run-gdbstub-follow-fork-mode-parent: follow-fork-mode
--bin $< --test $(MULTIARCH_SRC)/gdbstub/follow-fork-mode-parent.py, \
following parents on fork)
+run-gdbstub-late-attach: late-attach
+ $(call run-test, $@, env LATE_ATTACH_PY=1 $(GDB_SCRIPT) \
+ --gdb $(GDB) \
+ --qemu $(QEMU) --qargs "$(QEMU_OPTS)" --no-suspend \
+ --bin $< --test $(MULTIARCH_SRC)/gdbstub/late-attach.py, \
+ attaching to a running process)
+
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb with $(patsubst -%,,$(TARGET_NAME)) support")
@@ -139,7 +146,7 @@ EXTRA_RUNS += run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read \
run-gdbstub-registers run-gdbstub-prot-none \
run-gdbstub-catch-syscalls run-gdbstub-follow-fork-mode-child \
run-gdbstub-follow-fork-mode-parent \
- run-gdbstub-qxfer-siginfo-read
+ run-gdbstub-qxfer-siginfo-read run-gdbstub-late-attach
# ARM Compatible Semi Hosting Tests
#
diff --git a/tests/tcg/multiarch/gdbstub/late-attach.py b/tests/tcg/multiarch/gdbstub/late-attach.py
new file mode 100644
index 0000000..1d40efb
--- /dev/null
+++ b/tests/tcg/multiarch/gdbstub/late-attach.py
@@ -0,0 +1,28 @@
+"""Test attaching GDB to a running process.
+
+SPDX-License-Identifier: GPL-2.0-or-later
+"""
+from test_gdbstub import main, report
+
+
+def run_test():
+ """Run through the tests one by one"""
+ try:
+ phase = gdb.parse_and_eval("phase").string()
+ except gdb.error:
+ # Assume the guest did not reach main().
+ phase = "start"
+
+ if phase == "start":
+ gdb.execute("break sigwait")
+ gdb.execute("continue")
+ phase = gdb.parse_and_eval("phase").string()
+ report(phase == "sigwait", "{} == \"sigwait\"".format(phase))
+
+ gdb.execute("signal SIGUSR1")
+
+ exitcode = int(gdb.parse_and_eval("$_exitcode"))
+ report(exitcode == 0, "{} == 0".format(exitcode))
+
+
+main(run_test)
diff --git a/tests/tcg/multiarch/late-attach.c b/tests/tcg/multiarch/late-attach.c
new file mode 100644
index 0000000..20a3640
--- /dev/null
+++ b/tests/tcg/multiarch/late-attach.c
@@ -0,0 +1,41 @@
+/*
+ * Test attaching GDB to a running process.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static const char *phase = "start";
+
+int main(void)
+{
+ sigset_t set;
+ int sig;
+
+ assert(sigfillset(&set) == 0);
+ assert(sigprocmask(SIG_BLOCK, &set, NULL) == 0);
+
+ /* Let GDB know it can send SIGUSR1. */
+ phase = "sigwait";
+ if (getenv("LATE_ATTACH_PY")) {
+ assert(sigwait(&set, &sig) == 0);
+ if (sig != SIGUSR1) {
+ fprintf(stderr, "Unexpected signal %d\n", sig);
+ return EXIT_FAILURE;
+ }
+ }
+
+ /* Check that the guest does not see host_interrupt_signal. */
+ assert(sigpending(&set) == 0);
+ for (sig = 1; sig < NSIG; sig++) {
+ if (sigismember(&set, sig)) {
+ fprintf(stderr, "Unexpected signal %d\n", sig);
+ return EXIT_FAILURE;
+ }
+ }
+
+ return EXIT_SUCCESS;
+}