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tests/tcg: Add the syscall catchpoint gdbstub test
Check that adding/removing syscall catchpoints works. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20240202152506.279476-6-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240207163812.3231697-15-alex.bennee@linaro.org>
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Original file line number | Diff line number | Diff line change |
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/* | ||
* Test GDB syscall catchpoints. | ||
* | ||
* SPDX-License-Identifier: GPL-2.0-or-later | ||
*/ | ||
#define _GNU_SOURCE | ||
#include <stdlib.h> | ||
#include <unistd.h> | ||
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const char *catch_syscalls_state = "start"; | ||
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void end_of_main(void) | ||
{ | ||
} | ||
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int main(void) | ||
{ | ||
int ret = EXIT_FAILURE; | ||
char c0 = 'A', c1; | ||
int fd[2]; | ||
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catch_syscalls_state = "pipe2"; | ||
if (pipe2(fd, 0)) { | ||
goto out; | ||
} | ||
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catch_syscalls_state = "write"; | ||
if (write(fd[1], &c0, sizeof(c0)) != sizeof(c0)) { | ||
goto out_close; | ||
} | ||
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catch_syscalls_state = "read"; | ||
if (read(fd[0], &c1, sizeof(c1)) != sizeof(c1)) { | ||
goto out_close; | ||
} | ||
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catch_syscalls_state = "check"; | ||
if (c0 == c1) { | ||
ret = EXIT_SUCCESS; | ||
} | ||
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out_close: | ||
catch_syscalls_state = "close"; | ||
close(fd[0]); | ||
close(fd[1]); | ||
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out: | ||
catch_syscalls_state = "end"; | ||
end_of_main(); | ||
return ret; | ||
} |
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"""Test GDB syscall catchpoints. | ||
SPDX-License-Identifier: GPL-2.0-or-later | ||
""" | ||
from test_gdbstub import main, report | ||
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def check_state(expected): | ||
"""Check the catch_syscalls_state value""" | ||
actual = gdb.parse_and_eval("catch_syscalls_state").string() | ||
report(actual == expected, "{} == {}".format(actual, expected)) | ||
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def run_test(): | ||
"""Run through the tests one by one""" | ||
gdb.Breakpoint("main") | ||
gdb.execute("continue") | ||
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# Check that GDB stops for pipe2/read calls/returns, but not for write. | ||
gdb.execute("delete") | ||
try: | ||
gdb.execute("catch syscall pipe2 read") | ||
except gdb.error as exc: | ||
exc_str = str(exc) | ||
if "not supported on this architecture" in exc_str: | ||
print("SKIP: {}".format(exc_str)) | ||
return | ||
raise | ||
for _ in range(2): | ||
gdb.execute("continue") | ||
check_state("pipe2") | ||
for _ in range(2): | ||
gdb.execute("continue") | ||
check_state("read") | ||
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# Check that deletion works. | ||
gdb.execute("delete") | ||
gdb.Breakpoint("end_of_main") | ||
gdb.execute("continue") | ||
check_state("end") | ||
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# Check that catch-all works (libc should at least call exit). | ||
gdb.execute("delete") | ||
gdb.execute("catch syscall") | ||
gdb.execute("continue") | ||
gdb.execute("delete") | ||
gdb.execute("continue") | ||
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exitcode = int(gdb.parse_and_eval("$_exitcode")) | ||
report(exitcode == 0, "{} == 0".format(exitcode)) | ||
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main(run_test) |