v3: https://lists.gnu.org/archive/html/qemu-devel/2024-02/msg03142.html v3 -> v4: Address the review comments, add R-bs. Add the get_task_state() refactoring. Keep passing CPUState to gdbserver_fork_end() for tb_flush(). Patches that need review: 02/12, 09/12-12/12.
v2: https://lists.gnu.org/archive/html/qemu-devel/2024-02/msg00810.html v2 -> v3: Rebase on top of master. Fix a typo in the 01/11 commit message. v1: https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg06646.html v1 -> v2: Factor out a number of prep patches; Add a state transition diagram comment (Alex). Improve a few comments; Extend the ts_tid fix to bsd. Hi, I needed to debug a linux-user crash between fork() and exec() [1] and realized that gdbstub does not allow this. This series lifts this restriction (one still cannot debug past exec() though). Patches 1-10 are preliminary refactorings, patch 11 is the implementation, and patch 12 is the test. [1] https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg06424.html Best regards, Ilya Ilya Leoshkevich (12): gdbstub: Support disablement in a multi-threaded process {linux,bsd}-user: Introduce get_task_state() {linux,bsd}-user: Update ts_tid after fork() gdbstub: Introduce gdbserver_fork_start() {linux,bsd}-user: Pass pid to fork_end() {linux,bsd}-user: Pass pid to gdbserver_fork() gdbstub: Call gdbserver_fork() both in parent and in child gdbstub: Introduce gdb_handle_query_supported_user() gdbstub: Introduce gdb_handle_set_thread_user() gdbstub: Introduce gdb_handle_detach_user() gdbstub: Implement follow-fork-mode child tests/tcg: Add two follow-fork-mode tests bsd-user/bsd-file.h | 2 +- bsd-user/freebsd/os-proc.h | 6 +- bsd-user/main.c | 9 +- bsd-user/qemu.h | 7 +- bsd-user/signal.c | 20 +- gdbstub/gdbstub.c | 29 ++- gdbstub/internals.h | 3 + gdbstub/user-target.c | 4 +- gdbstub/user.c | 244 +++++++++++++++++- include/gdbstub/user.h | 10 +- include/user/safe-syscall.h | 2 +- linux-user/aarch64/cpu_loop.c | 2 +- linux-user/arm/cpu_loop.c | 4 +- linux-user/arm/signal.c | 2 +- linux-user/cris/cpu_loop.c | 2 +- linux-user/elfload.c | 6 +- linux-user/hppa/signal.c | 2 +- linux-user/linuxload.c | 2 +- linux-user/m68k/cpu_loop.c | 2 +- linux-user/m68k/target_cpu.h | 2 +- linux-user/main.c | 8 +- linux-user/mips/cpu_loop.c | 2 +- linux-user/ppc/signal.c | 4 +- linux-user/qemu.h | 5 + linux-user/riscv/cpu_loop.c | 2 +- linux-user/signal-common.h | 2 +- linux-user/signal.c | 30 +-- linux-user/syscall.c | 32 +-- linux-user/user-internals.h | 2 +- linux-user/vm86.c | 18 +- linux-user/xtensa/signal.c | 2 +- plugins/api.c | 8 +- semihosting/arm-compat-semi.c | 8 +- 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 ++ 37 files changed, 511 insertions(+), 101 deletions(-) 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 -- 2.43.2
