diff options
| -rw-r--r-- | tests/tcg/multiarch/Makefile.target | 17 | ||||
| -rw-r--r-- | tests/tcg/multiarch/follow-fork-mode.c | 56 | ||||
| -rw-r--r-- | tests/tcg/multiarch/gdbstub/follow-fork-mode-child.py | 40 | ||||
| -rw-r--r-- | tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py | 16 |
4 files changed, 128 insertions, 1 deletions
diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Makefile.target index f11f3b084d..979a0dd1bc 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -106,6 +106,20 @@ run-gdbstub-catch-syscalls: catch-syscalls --bin $< --test $(MULTIARCH_SRC)/gdbstub/catch-syscalls.py, \ hitting a syscall catchpoint) +run-gdbstub-follow-fork-mode-child: follow-fork-mode + $(call run-test, $@, $(GDB_SCRIPT) \ + --gdb $(GDB) \ + --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \ + --bin $< --test $(MULTIARCH_SRC)/gdbstub/follow-fork-mode-child.py, \ + following children on fork) + +run-gdbstub-follow-fork-mode-parent: follow-fork-mode + $(call run-test, $@, $(GDB_SCRIPT) \ + --gdb $(GDB) \ + --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \ + --bin $< --test $(MULTIARCH_SRC)/gdbstub/follow-fork-mode-parent.py, \ + following parents on fork) + else run-gdbstub-%: $(call skip-test, "gdbstub test $*", "need working gdb with $(patsubst -%,,$(TARGET_NAME)) support") @@ -113,7 +127,8 @@ endif EXTRA_RUNS += run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read \ run-gdbstub-proc-mappings run-gdbstub-thread-breakpoint \ run-gdbstub-registers run-gdbstub-prot-none \ - run-gdbstub-catch-syscalls + run-gdbstub-catch-syscalls run-gdbstub-follow-fork-mode-child \ + run-gdbstub-follow-fork-mode-parent # ARM Compatible Semi Hosting Tests # diff --git a/tests/tcg/multiarch/follow-fork-mode.c b/tests/tcg/multiarch/follow-fork-mode.c new file mode 100644 index 0000000000..cb6b032b38 --- /dev/null +++ b/tests/tcg/multiarch/follow-fork-mode.c @@ -0,0 +1,56 @@ +/* + * Test GDB's follow-fork-mode. + * + * fork() a chain of processes. + * Parents sends one byte to their children, and children return their + * position in the chain, in order to prove that they survived GDB's fork() + * handling. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include <assert.h> +#include <stdlib.h> +#include <sys/wait.h> +#include <unistd.h> + +void break_after_fork(void) +{ +} + +int main(void) +{ + int depth = 42, err, i, fd[2], status; + pid_t child, pid; + ssize_t n; + char b; + + for (i = 0; i < depth; i++) { + err = pipe(fd); + assert(err == 0); + child = fork(); + break_after_fork(); + assert(child != -1); + if (child == 0) { + close(fd[1]); + + n = read(fd[0], &b, 1); + close(fd[0]); + assert(n == 1); + assert(b == (char)i); + } else { + close(fd[0]); + + b = (char)i; + n = write(fd[1], &b, 1); + close(fd[1]); + assert(n == 1); + + pid = waitpid(child, &status, 0); + assert(pid == child); + assert(WIFEXITED(status)); + return WEXITSTATUS(status) - 1; + } + } + + return depth; +} diff --git a/tests/tcg/multiarch/gdbstub/follow-fork-mode-child.py b/tests/tcg/multiarch/gdbstub/follow-fork-mode-child.py new file mode 100644 index 0000000000..72a6e440c0 --- /dev/null +++ b/tests/tcg/multiarch/gdbstub/follow-fork-mode-child.py @@ -0,0 +1,40 @@ +"""Test GDB's follow-fork-mode child. + +SPDX-License-Identifier: GPL-2.0-or-later +""" +from test_gdbstub import main, report + + +def run_test(): + """Run through the tests one by one""" + gdb.execute("set follow-fork-mode child") + # Check that the parent breakpoints are unset. + gdb.execute("break break_after_fork") + # Check that the parent syscall catchpoints are unset. + # Skip this check on the architectures that don't have them. + have_fork_syscall = False + for fork_syscall in ("fork", "clone", "clone2", "clone3"): + try: + gdb.execute("catch syscall {}".format(fork_syscall)) + except gdb.error: + pass + else: + have_fork_syscall = True + gdb.execute("continue") + for i in range(42): + if have_fork_syscall: + # syscall entry. + if i % 2 == 0: + # Check that the parent single-stepping is turned off. + gdb.execute("si") + else: + gdb.execute("continue") + # syscall exit. + gdb.execute("continue") + # break_after_fork() + gdb.execute("continue") + exitcode = int(gdb.parse_and_eval("$_exitcode")) + report(exitcode == 42, "{} == 42".format(exitcode)) + + +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py b/tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py new file mode 100644 index 0000000000..5c2fe72208 --- /dev/null +++ b/tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py @@ -0,0 +1,16 @@ +"""Test GDB's follow-fork-mode parent. + +SPDX-License-Identifier: GPL-2.0-or-later +""" +from test_gdbstub import main, report + + +def run_test(): + """Run through the tests one by one""" + gdb.execute("set follow-fork-mode parent") + gdb.execute("continue") + exitcode = int(gdb.parse_and_eval("$_exitcode")) + report(exitcode == 0, "{} == 0".format(exitcode)) + + +main(run_test) |