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Processed in 0.082053 secs); 06 Oct 2023 09:06:26 -0000 Received: from nedpc1.intern.lauterbach.com (Authenticated_SSL:neder@[10.2.11.92]) (envelope-sender ) by smtp1.lauterbach.com (qmail-ldap-1.03) with TLS_AES_256_GCM_SHA384 encrypted SMTP for ; 6 Oct 2023 09:06:25 -0000 From: Nicolas Eder To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Christian.Boenig@lauterbach.com, =?utf-8?q?Alex_Benn=C3=A9e?= , Nicolas Eder Subject: [PATCH v2 11/29] query for the VM state added Date: Fri, 6 Oct 2023 11:05:52 +0200 Message-Id: <20231006090610.26171-12-nicolas.eder@lauterbach.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231006090610.26171-1-nicolas.eder@lauterbach.com> References: <20231006090610.26171-1-nicolas.eder@lauterbach.com> MIME-Version: 1.0 X-Qmail-Scanner-2.11: added fake Content-Type header Received-SPF: pass client-ip=62.154.241.196; envelope-from=nicolas.eder@lauterbach.com; helo=smtp1.lauterbach.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: neder --- mcdstub/internals.h | 54 ++++++++- mcdstub/mcd_shared_defines.h | 13 ++ mcdstub/mcdstub.c | 229 ++++++++++++++++++++++++++++------- 3 files changed, 249 insertions(+), 47 deletions(-) diff --git a/mcdstub/internals.h b/mcdstub/internals.h index 0de8d8fd07..2c64cfc0f9 100644 --- a/mcdstub/internals.h +++ b/mcdstub/internals.h @@ -22,6 +22,21 @@ #define MCD_TRIG_OPT_DATA_IS_CONDITION 0x00000008 #define MCD_TRIG_ACTION_DBG_DEBUG 0x00000001 +typedef uint32_t mcd_core_event_et; +enum { + MCD_CORE_EVENT_NONE = 0x00000000, /**< No since the last poll. */ + MCD_CORE_EVENT_MEMORY_CHANGE = 0x00000001, /**< Memory content has changed. */ + MCD_CORE_EVENT_REGISTER_CHANGE = 0x00000002, /**< Register contents have changed. */ + MCD_CORE_EVENT_TRACE_CHANGE = 0x00000004, /**< Trace contents or states have changed. */ + MCD_CORE_EVENT_TRIGGER_CHANGE = 0x00000008, /**< Triggers or trigger states have changed. */ + MCD_CORE_EVENT_STOPPED = 0x00000010, /**< Target was stopped at least once since the last poll, + it may already be running again. */ + MCD_CORE_EVENT_CHL_PENDING = 0x00000020, /**< A target communication channel request from the target + is pending. */ + MCD_CORE_EVENT_CUSTOM_LO = 0x00010000, /**< Begin Range: User defined core events. */ + MCD_CORE_EVENT_CUSTOM_HI = 0x40000000, /**< End Range: User defined core events. */ +}; + // schema defines #define ARG_SCHEMA_QRYHANDLE 'q' #define ARG_SCHEMA_STRING 's' @@ -34,13 +49,25 @@ #define RESET_MEMORY "memory_reset" // more -#define QUERY_TOTAL_NUMBER 11 //FIXME: set this to a usefull value in the end -#define CMD_SCHEMA_LENGTH 3 -#define MAX_SCHEMA_ARGS CMD_SCHEMA_LENGTH-1 +#define QUERY_TOTAL_NUMBER 12 //FIXME: set this to a usefull value in the end +#define CMD_SCHEMA_LENGTH 2 #define MCD_SYSTEM_NAME "qemu-system" // tcp query packet values templates #define DEVICE_NAME_TEMPLATE(s) "qemu-" #s "-device" +// state strings +#define STATE_STR_UNKNOWN(d) "cpu " #d " in unknown state" +#define STATE_STR_DEBUG(d) "cpu " #d " in debug state" +#define STATE_STR_RUNNING(d) "cpu " #d " running" +#define STATE_STR_HALTED(d) "cpu " #d " currently halted" +#define STATE_STR_INIT_HALTED "vm halted since boot" +#define STATE_STR_INIT_RUNNING "vm running since boot" +#define STATE_STR_BREAK_HW "stopped beacuse of HW breakpoint" +#define STATE_STR_BREAK_READ(d) "stopped beacuse of read access at " #d +#define STATE_STR_BREAK_WRITE(d) "stopped beacuse of write access at " #d +#define STATE_STR_BREAK_RW(d) "stopped beacuse of read or write access at " #d +#define STATE_STR_BREAK_UNKNOWN "stopped for unknown reason" + // GDB stuff thats needed for GDB function, which we use typedef struct GDBRegisterState { int base_reg; @@ -113,6 +140,16 @@ typedef struct mcd_trigger_st { uint32_t nr_trigger; } mcd_trigger_st; +typedef struct mcd_cpu_state_st { + const char *state; + bool memory_changed; + bool registers_changed; + bool target_was_stopped; + uint32_t trig_id; + const char *stop_str; + const char *info_str; +} mcd_cpu_state_st; + typedef struct MCDState { bool init; /* have we been initialised? */ CPUState *c_cpu; /* current CPU for everything */ @@ -134,12 +171,15 @@ typedef struct MCDState { int supported_sstep_flags; // my stuff + RunState vm_current_state; + RunState vm_previous_state; uint32_t query_cpu_id; GList *all_memspaces; GList *all_reggroups; GList *all_registers; GArray *resets; mcd_trigger_st trigger; + mcd_cpu_state_st cpu_state; MCDCmdParseEntry mcd_query_cmds_table[QUERY_TOTAL_NUMBER]; } MCDState; @@ -254,9 +294,9 @@ void mcd_exit(int code); void run_cmd_parser(const char *data, const MCDCmdParseEntry *cmd); int process_string_cmd(void *user_ctx, const char *data, const MCDCmdParseEntry *cmds, int num_cmds); int cmd_parse_params(const char *data, const char *schema, GArray *params); -void handle_continue(GArray *params, void *user_ctx); +void handle_vm_start(GArray *params, void *user_ctx); +void handle_vm_stop(GArray *params, void *user_ctx); void handle_gen_query(GArray *params, void *user_ctx); -void mcd_append_thread_id(CPUState *cpu, GString *buf); int mcd_get_cpu_index(CPUState *cpu); CPUState* mcd_get_cpu(uint32_t i_cpu_index); void handle_query_cores(GArray *params, void *user_ctx); @@ -269,7 +309,8 @@ void handle_query_reset_c(GArray *params, void *user_ctx); void handle_close_server(GArray *params, void *user_ctx); void handle_close_core(GArray *params, void *user_ctx); void handle_query_trigger(GArray *params, void *user_ctx); -void mcd_continue(void); +void mcd_vm_start(void); +void mcd_vm_stop(void); void handle_query_reg_groups_f(GArray *params, void *user_ctx); void handle_query_reg_groups_c(GArray *params, void *user_ctx); void handle_query_mem_spaces_f(GArray *params, void *user_ctx); @@ -279,6 +320,7 @@ void handle_query_regs_c(GArray *params, void *user_ctx); void handle_open_server(GArray *params, void *user_ctx); void parse_reg_xml(const char *xml, int size, GArray* registers); void handle_reset(GArray *params, void *user_ctx); +void handle_query_state(GArray *params, void *user_ctx); // arm specific functions int mcd_arm_store_mem_spaces(CPUState *cpu, GArray* memspaces); diff --git a/mcdstub/mcd_shared_defines.h b/mcdstub/mcd_shared_defines.h index 7e96129cdf..8cec2e9f23 100644 --- a/mcdstub/mcd_shared_defines.h +++ b/mcdstub/mcd_shared_defines.h @@ -7,6 +7,7 @@ #define TCP_CHAR_OPEN_SERVER 'I' #define TCP_CHAR_OPEN_CORE 'i' #define TCP_CHAR_GO 'c' +#define TCP_CHAR_BREAK 'b' #define TCP_CHAR_QUERY 'q' #define TCP_CHAR_CLOSE_SERVER 'D' #define TCP_CHAR_CLOSE_CORE 'd' @@ -33,6 +34,7 @@ #define QUERY_ARG_MEMORY "memory" #define QUERY_ARG_REGGROUP "reggroup" #define QUERY_ARG_REG "reg" +#define QUERY_ARG_STATE "state" // tcp query packet argument list #define TCP_ARGUMENT_NAME "name" @@ -48,6 +50,11 @@ #define TCP_ARGUMENT_MEMSPACEID "memspaceid" #define TCP_ARGUMENT_SIZE "size" #define TCP_ARGUMENT_THREAD "thread" +#define TCP_ARGUMENT_TRIGGER_ID "trig_id" +#define TCP_ARGUMENT_STOP_STRING "stop_str" +#define TCP_ARGUMENT_INFO_STRING "info_str" +#define TCP_ARGUMENT_STATE "state" +#define TCP_ARGUMENT_EVENT "event" #define TCP_ARGUMENT_DEVICE "device" #define TCP_ARGUMENT_CORE "core" #define TCP_ARGUMENT_AMOUNT_CORE "nr_cores" @@ -58,4 +65,10 @@ // for packets sent to qemu #define ARGUMENT_SEPARATOR ';' +// core states +#define CORE_STATE_RUNNING "running" +#define CORE_STATE_HALTED "halted" +#define CORE_STATE_DEBUG "debug" +#define CORE_STATE_UNKNOWN "unknown" + #endif diff --git a/mcdstub/mcdstub.c b/mcdstub/mcdstub.c index 85e0c3a219..dc40a68338 100644 --- a/mcdstub/mcdstub.c +++ b/mcdstub/mcdstub.c @@ -68,6 +68,13 @@ void mcd_init_mcdserver_state(void) // init query table init_query_cmds_table(mcdserver_state.mcd_query_cmds_table); + + // at this time the cpu hans't been started! -> set cpu_state + mcd_cpu_state_st cpu_state = { + .state = CORE_STATE_HALTED, + .info_str = STATE_STR_INIT_HALTED, + }; + mcdserver_state.cpu_state = cpu_state; } void init_query_cmds_table(MCDCmdParseEntry* mcd_query_cmds_table) { @@ -156,6 +163,14 @@ void init_query_cmds_table(MCDCmdParseEntry* mcd_query_cmds_table) { }; strcpy(query_regs_c.schema, (char[2]) { (char) ARG_SCHEMA_QRYHANDLE, '\0' }); mcd_query_cmds_table[cmd_number] = query_regs_c; + cmd_number++; + + MCDCmdParseEntry query_state = { + .handler = handle_query_state, + .cmd = QUERY_ARG_STATE, + }; + strcpy(query_state.schema, (char[2]) { (char) ARG_SCHEMA_CORENUM, '\0' }); + mcd_query_cmds_table[cmd_number] = query_state; } void reset_mcdserver_state(void) @@ -336,6 +351,7 @@ void mcd_chr_receive(void *opaque, const uint8_t *buf, int size) for (i = 0; i < size; i++) { mcd_read_byte(buf[i]); + if (buf[i]==0) break; } } @@ -366,12 +382,12 @@ void mcd_read_byte(uint8_t ch) return; } } - if (runstate_is_running()) { + //if (runstate_is_running()) { /* when the CPU is running, we cannot do anything except stop it when receiving a char */ - vm_stop(RUN_STATE_PAUSED); - } - else { + //vm_stop(RUN_STATE_PAUSED); + //} + //else { switch(mcdserver_state.state) { case RS_IDLE: if (ch == TCP_COMMAND_START) { @@ -434,7 +450,7 @@ void mcd_read_byte(uint8_t ch) default: abort(); } - } + //} } int mcd_handle_packet(const char *line_buf) @@ -457,12 +473,22 @@ int mcd_handle_packet(const char *line_buf) // go command { static MCDCmdParseEntry go_cmd_desc = { - .handler = handle_continue, + .handler = handle_vm_start, }; go_cmd_desc.cmd = (char[2]) { (char) TCP_CHAR_GO, '\0' }; cmd_parser = &go_cmd_desc; } break; + case TCP_CHAR_BREAK: + // go command + { + static MCDCmdParseEntry break_cmd_desc = { + .handler = handle_vm_stop, + }; + break_cmd_desc.cmd = (char[2]) { (char) TCP_CHAR_BREAK, '\0' }; + cmd_parser = &break_cmd_desc; + } + break; case TCP_CHAR_KILLQEMU: // kill qemu completely error_report("QEMU: Terminated via MCDstub"); @@ -514,7 +540,7 @@ int mcd_handle_packet(const char *line_buf) .handler = handle_reset, }; reset_cmd_desc.cmd = (char[2]) { (char) TCP_CHAR_RESET, '\0' }; - strcpy(reset_cmd_desc.schema, (char[3]) { (char) ARG_SCHEMA_INT, ARG_SCHEMA_INT, '\0' }); + strcpy(reset_cmd_desc.schema, (char[2]) { (char) ARG_SCHEMA_INT, '\0' }); cmd_parser = &reset_cmd_desc; } break; @@ -532,16 +558,14 @@ int mcd_handle_packet(const char *line_buf) return RS_IDLE; } -void handle_continue(GArray *params, void *user_ctx) -{ - /* - if (params->len) { - gdb_set_cpu_pc(get_param(params, 0)->val_ull); - } +void handle_vm_start(GArray *params, void *user_ctx) { + // todo add partial restart with arguments and so on + mcd_vm_start(); +} - mcdserver_state.signal = 0; - gdb_continue(); - */ +void handle_vm_stop(GArray *params, void *user_ctx) { + // todo add partial stop with arguments and so on + mcd_vm_stop(); } void handle_gen_query(GArray *params, void *user_ctx) @@ -576,7 +600,7 @@ void run_cmd_parser(const char *data, const MCDCmdParseEntry *cmd) int cmd_parse_params(const char *data, const char *schema, GArray *params) { char data_buffer[64] = {0}; - char *separator = strchr(data_buffer, ARGUMENT_SEPARATOR); + char *separator = strchr(data, ARGUMENT_SEPARATOR); int seperator_index = (int)(separator - data); if (separator) { @@ -586,25 +610,29 @@ int cmd_parse_params(const char *data, const char *schema, GArray *params) { else { strncpy(data_buffer, data, strlen(data)); } - for (int i = 0; ischema) { + if (strlen(cmd->schema)) { // this only gets the data from data beginning after the command name if (cmd_parse_params(&data[strlen(cmd->cmd)], cmd->schema, params)) { return -1; @@ -679,7 +707,7 @@ void mcd_chr_event(void *opaque, QEMUChrEvent event) s->c_cpu = mcd_first_attached_cpu(); - vm_stop(RUN_STATE_PAUSED); + //vm_stop(RUN_STATE_PAUSED); //TODO: this might not be necessary //replay_gdb_attached(); //gdb_has_xml = false; @@ -709,14 +737,98 @@ void mcd_sigterm_handler(int signal) void mcd_vm_state_change(void *opaque, bool running, RunState state) { - printf("this calls state_change\n"); + CPUState *cpu = mcdserver_state.c_cpu; + + // update cpu state + mcdserver_state.vm_previous_state = mcdserver_state.vm_current_state; + mcdserver_state.vm_current_state = state; + + if (mcdserver_state.state == RS_INACTIVE) { + return; + } + + if (cpu == NULL) { + if (running) { + // this is the case if qemu starts the vm before any mcd is connected + const char *mcd_state; + mcd_state = CORE_STATE_RUNNING; + const char *info_str; + info_str = STATE_STR_INIT_RUNNING; + mcdserver_state.cpu_state.state = mcd_state; + mcdserver_state.cpu_state.state = info_str; + } + return; + } + + const char *mcd_state; + const char *stop_str; + const char *info_str; + uint32_t trig_id = 0; + switch (state) { + case RUN_STATE_RUNNING: + mcd_state = CORE_STATE_RUNNING; + info_str = STATE_STR_RUNNING(cpu->cpu_index); + stop_str = ""; + break; + case RUN_STATE_DEBUG: + mcd_state = CORE_STATE_DEBUG; + info_str = STATE_STR_DEBUG(cpu->cpu_index); + if (cpu->watchpoint_hit) { + switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) { + case BP_MEM_READ: + trig_id = MCD_TRIG_TYPE_READ; + stop_str = STATE_STR_BREAK_READ(cpu->watchpoint_hit->hitaddr); + break; + case BP_MEM_WRITE: + trig_id = MCD_TRIG_TYPE_WRITE; + stop_str = STATE_STR_BREAK_WRITE(cpu->watchpoint_hit->hitaddr); + break; + case BP_MEM_ACCESS: + trig_id = MCD_TRIG_TYPE_RW; + stop_str = STATE_STR_BREAK_RW(cpu->watchpoint_hit->hitaddr); + break; + default: + break; + stop_str = STATE_STR_BREAK_UNKNOWN; + } + cpu->watchpoint_hit = NULL; + } else { + // "hardware" breakpoint hit! + trig_id = MCD_TRIG_TYPE_IP; + stop_str = STATE_STR_BREAK_HW; + tb_flush(cpu); + } + break; + case RUN_STATE_PAUSED: + info_str = STATE_STR_HALTED(cpu->cpu_index); + mcd_state = CORE_STATE_HALTED; + stop_str = ""; + break; + case RUN_STATE_WATCHDOG: + info_str = STATE_STR_UNKNOWN(cpu->cpu_index); + mcd_state = CORE_STATE_UNKNOWN; + stop_str = ""; + printf("runstate watchdog hit\n"); + break; + default: + info_str = STATE_STR_UNKNOWN(cpu->cpu_index); + mcd_state = CORE_STATE_UNKNOWN; + stop_str = ""; + // we don't care; + break; + } + + mcdserver_state.cpu_state.state = mcd_state; + mcdserver_state.cpu_state.trig_id = trig_id; + mcdserver_state.cpu_state.stop_str = stop_str; + mcdserver_state.cpu_state.info_str = info_str; + + /* disable single step if it was enabled */ + cpu_single_step(cpu, 0); } int mcd_put_packet(const char *buf) { - //tracing - //trace_gdbstub_io_reply(buf); - return mcd_put_packet_binary(buf, strlen(buf), false); } @@ -1267,6 +1379,7 @@ void handle_open_core(GArray *params, void *user_ctx) { // get the cpu whith the given id uint32_t cpu_id = get_param(params, 0)->cpu_id; CPUState *cpu = mcd_get_cpu(cpu_id); + mcdserver_state.c_cpu = cpu; CPUClass *cc = CPU_GET_CLASS(cpu); gchar *arch = cc->gdb_arch_name(cpu); int return_value = 0; @@ -1318,6 +1431,7 @@ void handle_open_core(GArray *params, void *user_ctx) { // we don't support other architectures assert(0); } + g_free(arch); } @@ -1367,10 +1481,13 @@ void handle_close_core(GArray *params, void *user_ctx) { // free memory for correct core uint32_t cpu_id = get_param(params, 0)->cpu_id; GArray* memspaces = g_list_nth_data(mcdserver_state.all_memspaces, cpu_id); + mcdserver_state.all_memspaces = g_list_remove(mcdserver_state.all_memspaces, memspaces); g_array_free(memspaces, TRUE); GArray* reggroups = g_list_nth_data(mcdserver_state.all_reggroups, cpu_id); + mcdserver_state.all_reggroups = g_list_remove(mcdserver_state.all_reggroups, reggroups); g_array_free(reggroups, TRUE); GArray* registers = g_list_nth_data(mcdserver_state.all_registers, cpu_id); + mcdserver_state.all_registers = g_list_remove(mcdserver_state.all_registers, registers); g_array_free(registers, TRUE); } @@ -1395,7 +1512,7 @@ void handle_close_server(GArray *params, void *user_ctx) { if (!mcdserver_state.c_cpu) { /* No more process attached */ mcd_disable_syscalls(); - mcd_continue(); + mcd_vm_start(); } } @@ -1407,13 +1524,19 @@ void handle_query_trigger(GArray *params, void *user_ctx) { mcd_put_strbuf(); } -void mcd_continue(void) -{ - if (!runstate_needs_reset()) { +void mcd_vm_start(void) { + if (!runstate_needs_reset() && !runstate_is_running()) { vm_start(); } } +void mcd_vm_stop(void) { + if (runstate_is_running()) { + //might want to have DEBUG state here but idk + vm_stop(RUN_STATE_PAUSED); + } +} + void handle_query_mem_spaces_f(GArray *params, void *user_ctx) { // 1. get correct memspaces and set the query_cpu uint32_t cpu_id = get_param(params, 0)->cpu_id; @@ -1563,9 +1686,33 @@ void handle_query_regs_c(GArray *params, void *user_ctx) { void handle_reset(GArray *params, void *user_ctx) { int reset_id = get_param(params, 0)->data_int; - int bool_halt_after_reset = get_param(params, 1)->data_int; - if (reset_id>=0 && bool_halt_after_reset) { + //int bool_halt_after_reset = get_param(params, 1)->data_int; + if (reset_id>=0) { //fun for the compiler } - +} + +void handle_query_state(GArray *params, void *user_ctx) { + // send state from correct core + //uint32_t cpu_id = get_param(params, 0)->cpu_id; + // get state info + mcd_cpu_state_st state_info = mcdserver_state.cpu_state; + mcd_core_event_et event = MCD_CORE_EVENT_NONE; + if (state_info.memory_changed) { + event = event | MCD_CORE_EVENT_MEMORY_CHANGE; + state_info.memory_changed = false; + } + if (state_info.registers_changed) { + event = event | MCD_CORE_EVENT_REGISTER_CHANGE; + state_info.registers_changed = false; + } + if (state_info.target_was_stopped) { + event = event | MCD_CORE_EVENT_STOPPED; + state_info.target_was_stopped = false; + } + // send data + g_string_printf(mcdserver_state.str_buf, "%s=%s.%s=%d.%s=%d.%s=%d.%s=%s.%s=%s.", TCP_ARGUMENT_STATE, state_info.state, + TCP_ARGUMENT_EVENT, event, TCP_ARGUMENT_THREAD, 0, TCP_ARGUMENT_TRIGGER_ID, state_info.trig_id, + TCP_ARGUMENT_STOP_STRING, state_info.stop_str, TCP_ARGUMENT_INFO_STRING, state_info.info_str); + mcd_put_strbuf(); }