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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1707132281554100012 Content-Type: text/plain; charset="utf-8" Add follow-fork-mode child and and follow-fork-mode parent tests. Check for the obvious pitfalls, such as lingering breakpoints, catchpoints, and single-step mode. Signed-off-by: Ilya Leoshkevich --- tests/tcg/multiarch/Makefile.target | 17 +++++- tests/tcg/multiarch/follow-fork-mode.c | 56 +++++++++++++++++++ .../gdbstub/follow-fork-mode-child.py | 40 +++++++++++++ .../gdbstub/follow-fork-mode-parent.py | 16 ++++++ 4 files changed, 128 insertions(+), 1 deletion(-) create mode 100644 tests/tcg/multiarch/follow-fork-mode.c create mode 100644 tests/tcg/multiarch/gdbstub/follow-fork-mode-child.py create mode 100644 tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Make= file.target index e10951a8016..b8b70c81860 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -115,6 +115,20 @@ run-gdbstub-catch-syscalls: catch-syscalls --bin $< --test $(MULTIARCH_SRC)/gdbstub/catch-syscalls.py, \ hitting a syscall catchpoint) =20 +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") @@ -122,7 +136,8 @@ endif EXTRA_RUNS +=3D 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 =20 # ARM Compatible Semi Hosting Tests # diff --git a/tests/tcg/multiarch/follow-fork-mode.c b/tests/tcg/multiarch/f= ollow-fork-mode.c new file mode 100644 index 00000000000..cb6b032b388 --- /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 +#include +#include +#include + +void break_after_fork(void) +{ +} + +int main(void) +{ + int depth =3D 42, err, i, fd[2], status; + pid_t child, pid; + ssize_t n; + char b; + + for (i =3D 0; i < depth; i++) { + err =3D pipe(fd); + assert(err =3D=3D 0); + child =3D fork(); + break_after_fork(); + assert(child !=3D -1); + if (child =3D=3D 0) { + close(fd[1]); + + n =3D read(fd[0], &b, 1); + close(fd[0]); + assert(n =3D=3D 1); + assert(b =3D=3D (char)i); + } else { + close(fd[0]); + + b =3D (char)i; + n =3D write(fd[1], &b, 1); + close(fd[1]); + assert(n =3D=3D 1); + + pid =3D waitpid(child, &status, 0); + assert(pid =3D=3D 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 00000000000..72a6e440c08 --- /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 =3D 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 =3D True + gdb.execute("continue") + for i in range(42): + if have_fork_syscall: + # syscall entry. + if i % 2 =3D=3D 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 =3D int(gdb.parse_and_eval("$_exitcode")) + report(exitcode =3D=3D 42, "{} =3D=3D 42".format(exitcode)) + + +main(run_test) diff --git a/tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py b/tests= /tcg/multiarch/gdbstub/follow-fork-mode-parent.py new file mode 100644 index 00000000000..5c2fe722088 --- /dev/null +++ b/tests/tcg/multiarch/gdbstub/follow-fork-mode-parent.py @@ -0,0 +1,16 @@ +"""Test GDB's follow-fork-mode parent. + +SPDX-License-Identifier: GPL-2.0-or-later +""" +from test_gdbstub import main, report + + +def run_test(): + """Run through the tests one by one""" + gdb.execute("set follow-fork-mode parent") + gdb.execute("continue") + exitcode =3D int(gdb.parse_and_eval("$_exitcode")) + report(exitcode =3D=3D 0, "{} =3D=3D 0".format(exitcode)) + + +main(run_test) --=20 2.43.0