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* gdbstub: Implement set_thread (H pkt) with new infraJon Doron2019-06-121-30/+53
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190529064148.19856-7-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* gdbstub: Implement continue with signal (C pkt) with new infraJon Doron2019-06-121-5/+29
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190529064148.19856-6-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* gdbstub: Implement continue (c pkt) with new infraJon Doron2019-06-121-6/+19
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190529064148.19856-5-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* gdbstub: Implement thread_alive (T pkt) with new infraJon Doron2019-06-121-11/+32
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190529064148.19856-4-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* gdbstub: Implement deatch (D pkt) with new infraJon Doron2019-06-121-40/+61
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Message-Id: <20190529064148.19856-3-arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* gdbstub: Add infrastructure to parse cmd packetsJon Doron2019-06-121-0/+195
| | | | | | | Signed-off-by: Jon Doron <arilou@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190529064148.19856-2-arilou@gmail.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
* Include qemu-common.h exactly where neededMarkus Armbruster2019-06-121-0/+1
| | | | | | | | | | | | | | | | No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
* Include qemu/module.h where needed, drop it from qemu-common.hMarkus Armbruster2019-06-121-0/+1
| | | | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
* qemu-common: Move qemu_isalnum() etc. to qemu/ctype.hMarkus Armbruster2019-06-111-0/+2
| | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-3-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* semihosting: move semihosting configuration into its own directoryAlex Bennée2019-05-281-1/+1
| | | | | | | | | | | | In preparation for having some more common semihosting code let's excise the current config magic from vl.c into its own file. We shall later add more conditionals to the build configurations so we can avoid building this if we don't need it. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* gdbstub: Fix misuse of isxdigit()Markus Armbruster2019-05-221-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gdb_read_byte() passes its @ch argument to isxdigit(). Undefined behavior when the value is negative. Two callers: * gdb_chr_receive() passes an uint8_t value. Safe. * gdb_handlesig() a char value. Unsafe. Not a security issue, because the characters come from the gdb client, which is trusted. The obvious fix would be casting @ch to unsigned char. But note that gdb_read_byte() already casts @ch to uint8_t in many places. Uses of @ch without such a cast: (1) Compare to a character constant with == or != (2) s->linesum += ch (3) Store ch or ch ^ 0x20 into s->line_buf[] (4) Check for invalid RLE count: ch < ' ' || ch == '#' || ch == '$' || ch > 126 (5) Pass to isxdigit() (6) Pass to fromhex() Change the parameter type from int to uint8_t, and drop the now redundant casts. Affects the above uses as follows: (1) No change: the character constants are all non-negative. (2) Effectively no change: we only ever use s->linesum & 0xff, and s->linesum is int. (3) No change: s->line_buf[] is char[]. (4) No change. (5) Avoid undefined behavior. (6) No change: only reached when isxdigit(ch) Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190514180311.16028-5-armbru@redhat.com>
* gdbstub: Reject invalid RLE repeat countsMarkus Armbruster2019-05-221-1/+5
| | | | | | | | | | | | | | | | | | | "Debugging with GDB / Appendix E GDB Remote Serial Protocol / Overview" specifies "The printable characters '#' and '$' or with a numeric value greater than 126 must not be used." gdb_read_byte() only rejects values < 32. This is wrong. Impact depends on the caller: * gdb_handlesig() passes a char. Incorrectly accepts '#', '$' and '\127'. * gdb_chr_receive() passes an uint8_t. Additionally accepts characters with the most-significant bit set. Correct the validity check to match the specification. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20190514180311.16028-4-armbru@redhat.com>
* gdbstub: fix vCont packet handling when no thread is specifiedLuc Michel2019-03-261-2/+12
| | | | | | | | | | | | | | | | | | | | | | | The vCont packet accepts a series of actions, each being applied on a given thread ID. Giving no thread ID for an action is valid and means "all threads". This commit fixes vCont packets being incorrectly rejected when no thread ID was given for an action. In multiprocess mode, the GDB Remote Protocol specification is unclear on what "all threads" means. We choose to apply the action on all threads of all attached processes. This commit is based on the initial fix by Lucien Murray-Pitts. Fixes: e40e5204af8388 Reported-by: Lucien Murray-Pitts <lucienmp_antispam@yahoo.com> Reported-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190325110452.6756-1-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: Send a reply to the vKill packet.Sandra Loosemore2019-02-151-0/+1
| | | | | | | | | | | | | | | | | | | | Per the GDB remote protocol documentation https://sourceware.org/gdb/current/onlinedocs/gdb/Packets.html#index-vKill-packet the debug stub is expected to send a reply to the 'vKill' packet. At least some versions of GDB crash if the gdb stub simply exits without sending a reply. This patch fixes QEMU's gdb stub to conform to the expected behavior. Note that QEMU's existing handling of the legacy 'k' packet is correct: in that case GDB does not expect a reply, and QEMU does not send one. Signed-off-by: Sandra Loosemore <sandra@codesourcery.com> Message-id: 1550008033-26540-1-git-send-email-sandra@codesourcery.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* char: allow specifying a GMainContext at opening timePaolo Bonzini2019-02-131-2/+2
| | | | | | | | | | | | This will be needed by vhost-user-test, when each test switches to its own GMainLoop and GMainContext. Otherwise, for a reconnecting socket the initial connection will happen on the default GMainContext, and no one will be listening on it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20190202110834.24880-1-pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
* gdbstub: allow killing QEMU via vKill commandMax Filippov2019-02-051-0/+4
| | | | | | | | | | | | | | | | | With multiprocess extensions gdb uses 'vKill' packet instead of 'k' to kill the inferior. Handle 'vKill' the same way 'k' was handled in the presence of single process. Fixes: 7cf48f6752e5 ("gdbstub: add multiprocess support to (f|s)ThreadInfo and ThreadExtraInfo") Cc: Luc Michel <luc.michel@greensocs.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: KONRAD Frederic <frederic.konrad@adacore.com> Tested-by: KONRAD Frederic <frederic.konrad@adacore.com> Message-id: 20190130192403.13754-1-jcmvbkbc@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: Simplify gdb_get_cpu_pid() to use cpu->cluster_indexPeter Maydell2019-01-291-42/+4Star
| | | | | | | | | | | Now we're keeping the cluster index in the CPUState, we don't need to jump through hoops in gdb_get_cpu_pid() to find the associated cluster object. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20190121152218.9592-5-peter.maydell@linaro.org
* gdbstub: fix gdb_get_cpu(s, pid, tid) when pid and/or tid are 0Luc Michel2019-01-291-29/+43
| | | | | | | | | | | | | | | | | | | | | | a TID or PID value means "any thread" (resp. "any process"). This commit fixes the different combinations when at least one value is 0. When both are 0, the function now returns the first attached CPU, instead of the CPU with TID 1, which is not necessarily attached or even existent. When PID is specified but TID is 0, the function returns the first CPU in the process, or NULL if the process does not exist or is not attached. In other cases, it returns the corresponding CPU, while ignoring the PID check when PID is 0. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190119140000.11767-1-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess extension supportLuc Michel2019-01-071-0/+6
| | | | | | | | | | | | | Add multiprocess extension support by enabling multiprocess mode when the peer requests it, and by replying that we actually support it in the qSupported reply packet. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20181207090135.7651-16-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: gdb_set_stop_cpu: ignore request when process is not attachedLuc Michel2019-01-071-0/+10
| | | | | | | | | | | | | | When gdb_set_stop_cpu() is called with a CPU associated to a process currently not attached by the GDB client, return without modifying the stop CPU. Otherwise, GDB gets confused if it receives packets with a thread-id it does not know about. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20181207090135.7651-15-luc.michel@greensocs.com [PMM: fix checkpatch comment style nit] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: processes initialization on new peer connectionLuc Michel2019-01-071-5/+15
| | | | | | | | | | | | | When a new connection is established, we set the first process to be attached, and the others detached. The first CPU of the first process is selected as the current CPU. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181207090135.7651-14-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add support for vAttach packetsLuc Michel2019-01-071-0/+35
| | | | | | | | | | | | Add support for the vAttach packets. In multiprocess mode, GDB sends them to attach to additional processes. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181207090135.7651-13-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add support for extended mode packetLuc Michel2019-01-071-0/+3
| | | | | | | | | | | Add support for the '!' extended mode packet. This is required for the multiprocess extension. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-12-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to 'D' packetsLuc Michel2019-01-071-7/+53
| | | | | | | | | | | | 'D' packets are used by GDB to detach from a process. In multiprocess mode, the PID to detach from is sent in the request. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-11-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to gdb_vm_state_change()Luc Michel2019-01-071-3/+12
| | | | | | | | | | | | Add support for multiprocess extension in gdb_vm_state_change() function. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-10-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to Xfer:features:read:Luc Michel2019-01-071-20/+28
| | | | | | | | | | | | | | | | | | | | Change the Xfer:features:read: packet handling to support the multiprocess extension. This packet is used to request the XML description of the CPU. In multiprocess mode, different descriptions can be sent for different processes. This function now takes the process to send the description for as a parameter, and use a buffer in the process structure to store the generated description. It takes the first CPU of the process to generate the description. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-9-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to (f|s)ThreadInfo and ThreadExtraInfoLuc Michel2019-01-071-10/+27
| | | | | | | | | | | | | | | Change the thread info related packets handling to support multiprocess extension. Add the CPUs class name in the extra info to help differentiate them in multiprocess mode. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-8-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to 'sC' packetsLuc Michel2019-01-071-3/+9
| | | | | | | | | | | | | | Change the sC packet handling to support the multiprocess extension. Instead of returning the first thread, we return the first thread of the current process. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20181207090135.7651-7-luc.michel@greensocs.com [PMM: corrected checkpatch comment style nit] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to vCont packetsLuc Michel2019-01-071-15/+100
| | | | | | | | | | | | | | | | | | Add the gdb_first_attached_cpu() and gdb_next_attached_cpu() to iterate over all the CPUs in currently attached processes. Add the gdb_first_cpu_in_process() and gdb_next_cpu_in_process() to iterate over CPUs of a given process. Use them to add multiprocess extension support to vCont packets. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-6-luc.michel@greensocs.com [PMM: corrected checkpatch comment style nit] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to 'H' and 'T' packetsLuc Michel2019-01-071-18/+136
| | | | | | | | | | | | | | | | | | | | | | | | Add a couple of helper functions to cope with GDB threads and processes. The gdb_get_process() function looks for a process given a pid. The gdb_get_cpu() function returns the CPU corresponding to the (pid, tid) pair given as parameters. The read_thread_id() function parses the thread-id sent by the peer. This function supports the multiprocess extension thread-id syntax. The return value specifies if the parsing failed, or if a special case was encountered (all processes or all threads). Use them in 'H' and 'T' packets handling to support the multiprocess extension. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20181207090135.7651-5-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add multiprocess support to '?' packetsLuc Michel2019-01-071-2/+64
| | | | | | | | | | | | | | | | | | | | | | The gdb_get_cpu_pid() function does the PID lookup for the given CPU. It checks if the CPU is a direct child of a CPU cluster. If it is, the returned PID is the cluster ID plus one (cluster IDs start at 0, GDB PIDs at 1). When the CPU is not a child of such a container, the PID of the default process is returned. The gdb_fmt_thread_id() function generates the string to be used to identify a given thread, in a response packet for the peer. This function supports generating thread IDs when multiprocess mode is enabled (in the form `p<pid>.<tid>'). Use them in the reply to a '?' request. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20181207090135.7651-4-luc.michel@greensocs.com [PMM: fixed checkpatch blockquote style nit] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: introduce GDB processesLuc Michel2019-01-071-0/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a structure GDBProcess that represents processes from the GDB semantic point of view. CPUs can be split into different processes, by grouping them under different cpu-cluster objects. Each occurrence of a cpu-cluster object implies the existence of the corresponding process in the GDB stub. The GDB process ID is derived from the corresponding cluster ID as follows: GDB PID = cluster ID + 1 This is because PIDs -1 and 0 are reserved in GDB and cannot be used by processes. A default process is created to handle CPUs that are not in a cluster. This process gets the PID of the last process PID + 1. Signed-off-by: Luc Michel <luc.michel@greensocs.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181207090135.7651-3-luc.michel@greensocs.com [PMM: fixed checkpatch nit about block comment style] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: Remove unused includePhilippe Mathieu-Daudé2018-10-161-1/+0Star
| | | | | | Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
* chardev: mark the calls that allow an implicit mux monitorMarc-André Lureau2018-10-031-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is mostly for readability of the code. Let's make it clear which callers can create an implicit monitor when the chardev is muxed. This will also enforce a safer behaviour, as we don't really support creating monitor anywhere/anytime at the moment. Add an assert() to make sure the programmer explicitely wanted that behaviour. There are documented cases, such as: -serial/-parallel/-virtioconsole and to less extent -debugcon. Less obvious and questionable ones are -gdb, SLIRP -guestfwd and Xen console. Add a FIXME note for those, but keep the support for now. Other qemu_chr_new() callers either have a fixed parameter/filename string or do not need it, such as -qtest: * qtest.c: qtest_init() Afaik, only used by tests/libqtest.c, without mux. I don't think we support it outside of qemu testing: drop support for implicit mux monitor (qemu_chr_new() call: no implicit mux now). * hw/ All with literal @filename argument that doesn't enable mux monitor. * tests/ All with @filename argument that doesn't enable mux monitor. On a related note, the list of monitor creation places: - the chardev creators listed above: all from command line (except perhaps Xen console?) - -gdb & hmp gdbserver will create a "GDB monitor command" chardev that is wired to an HMP monitor. - -mon command line option From this short study, I would like to think that a monitor may only be created in the main thread today, though I remain skeptical :) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
* gdbstub: Prevent fd leakagePhilippe Mathieu-Daudé2018-06-011-0/+1
| | | | | | | | | | | | Since 2f652224f7, we now check if socket_set_nodelay() errored, but forgot to close the socket before reporting an error. Fixes: Coverity CID 1391290 (RESOURCE_LEAK) Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180524223458.5651-1-f4bug@amsat.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* gdbstub: Clarify what gdb_handlesig() is doingPeter Maydell2018-05-251-0/+6
| | | | | | | | | | | | gdb_handlesig()'s behaviour is not entirely obvious at first glance. Add a doc comment for it, and also add a comment explaining why it's ok for gdb_do_syscallv() to ignore gdb_handlesig()'s return value. (Coverity complains about this: CID 1390850.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20180515181958.25837-1-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* gdbstub: Handle errors in gdb_accept()Peter Maydell2018-05-201-4/+12
| | | | | | | | | | | | | In gdb_accept(), we both fail to check all errors (notably that from socket_set_nodelay(), as Coverity notes in CID 1005666), and fail to return an error status back to our caller. Correct both of these things, so that errors in accept() result in our stopping with a useful error message rather than ignoring it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
* gdbstub: Use qemu_set_cloexec()Peter Maydell2018-05-201-6/+2Star
| | | | | | | | | | | | Use the utility routine qemu_set_cloexec() rather than manually calling fcntl(). This lets us drop the #ifndef _WIN32 guards and also means Coverity doesn't complain that we're ignoring the fcntl error return (CID 1005665, CID 1005667). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
* target/arm: Add the XML dynamic generationAbdallah Bouassida2018-05-181-0/+10
| | | | | | | | | | | | | Generate an XML description for the cp-regs. Register these regs with the gdb_register_coprocessor(). Add arm_gdb_get_sysreg() to use it as a callback to read those regs. Add a dummy arm_gdb_set_sysreg(). Signed-off-by: Abdallah Bouassida <abdallah.bouassida@lauterbach.com> Tested-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1524153386-3550-4-git-send-email-abdallah.bouassida@lauterbach.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: fix off-by-one in gdb_handle_packet()Philippe Mathieu-Daudé2018-04-091-1/+2
| | | | | | | | | | memtohex() adds an extra trailing NUL character. Reported-by: AddressSanitizer Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20180408145933.1149-1-f4bug@amsat.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: send a termination packet instead of crashing gdbKONRAD Frederic2018-03-271-0/+7
| | | | | | | | | | | | | | | | | | | | | | Since the commit: commit 4486e89c219c0d1b9bd8dfa0b1dd5b0d51ff2268 Author: Stefan Hajnoczi <stefanha@redhat.com> Date: Wed Mar 7 14:42:05 2018 +0000 vl: introduce vm_shutdown() GDB crashes when qemu exits (at least on sparc-softmmu): Remote communication error. Target disconnected.: Connection reset by peer. Quitting: putpkt: write failed: Broken pipe. So send a packet to exit GDB before we exit QEMU: [Inferior 1 (Thread 0) exited normally] Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com> Message-id: 1521538773-30802-1-git-send-email-frederic.konrad@adacore.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* gdbstub: add tracingDoug Gale2017-12-181-35/+78
| | | | | | Signed-off-by: Doug Gale <doug16k@gmail.com> Message-id: 20171203013037.31978-1-doug16k@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* Use qemu_tolower() and qemu_toupper(), not tolower() and toupper()Peter Maydell2017-07-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | On NetBSD, where tolower() and toupper() are implemented using an array lookup, the compiler warns if you pass a plain 'char' to these functions: gdbstub.c:914:13: warning: array subscript has type 'char' This reflects the fact that toupper() and tolower() give undefined behaviour if they are passed a value that isn't a valid 'unsigned char' or EOF. We have qemu_tolower() and qemu_toupper() to avoid this problem; use them. (The use in scsi-generic.c does not trigger the warning because it passes a uint8_t; we switch it anyway, for consistency.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> for the s390 part. Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-id: 1500568290-7966-1-git-send-email-peter.maydell@linaro.org
* gdbstub: don't fail on vCont; C04:0; c packetsAlex Bennée2017-07-141-11/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | The thread-id of 0 means any CPU but we then ignore the fact we find the first_cpu in this case who can have an index of 0. Instead of bailing out just test if we have managed to match up thread-id to a CPU. Otherwise you get: gdb_handle_packet: command='vCont;C04:0;c' put_packet: reply='E22' The actual reason for gdb sending vCont;C04:0;c was fixed in a previous commit where we ensure the first_cpu's tid is correctly reported to gdb however we should still behave correctly next time it does send 0. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170712105216.747-5-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* qom/cpu: remove host_tid fieldAlex Bennée2017-07-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This was only used by the gdbstub and even then was only being set for subsequent threads. Rather the continue duplicating the number just make the gdbstub get the information from TaskState structure. Now the tid is correctly reported for all threads the bug I was seeing with "vCont;C04:0;c" packets is fixed as the correct tid is reported to gdb. I moved cpu_gdb_index into the gdbstub to facilitate easy access to the TaskState which is used elsewhere in gdbstub. To prevent BSD failing to build I've included ts_tid into its TaskStruct but not populated it - which was the same state as the old cpu->host_tid. I'll leave it up to the BSD maintainers to actually populate this properly if they want a working gdbstub with user-threads. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20170712105216.747-4-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* gdbstub: rename cpu_index -> cpu_gdb_indexAlex Bennée2017-07-141-6/+20
| | | | | | | | | | | | | | | This is to make it clear the index is purely a gdbstub function and should not be confused with the value of cpu->cpu_index. At the same time we move the function from the header to gdbstub itself which will help with later changes. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170712105216.747-3-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* gdbstub: modernise DEBUG_GDBAlex Bennée2017-07-141-44/+33Star
| | | | | | | | | | | | | Convert the a gdb_debug helper which compiles away to nothing when not used but still ensures the format strings are checked. There is some minor code motion for the incorrect checksum message to report it before we attempt to send the reply. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <20170712105216.747-2-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* char: add backend hotswap handlerAnton Nefedov2017-07-141-1/+1
| | | | | | | | | | | Frontends should have an interface to setup the handler of a backend change. The interface will be used in the next commits Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1499342940-56739-3-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* char: make chr_fe_deinit() optionaly delete backendMarc-André Lureau2017-06-021-13/+2Star
| | | | | | | | | | | This simplifies removing a backend for a frontend user (no need to retrieve the associated driver and separate delete call etc). NB: many frontends have questionable handling of ending a chardev. They should probably delete the backend to prevent broken reusage. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
* char: move CharBackend handling in char-fe unitMarc-André Lureau2017-06-021-0/+1
| | | | | | | | | | | | | | Move all the frontend struct and methods to a seperate unit. This avoids accidentally mixing backend and frontend calls, and helps with readabilty. Make qemu_chr_replay() a macro shared by both char and char-fe. Export qemu_chr_write(), and use a macro for qemu_chr_write_all() (nb: yes, CharBackend is for char frontend :) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
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