| /* |
| * Process debugging functions. |
| * |
| * Copyright 2000-2019 Willy Tarreau <willy@haproxy.org>. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <signal.h> |
| #include <time.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <syslog.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| #ifdef USE_EPOLL |
| #include <sys/epoll.h> |
| #endif |
| |
| #include <haproxy/api.h> |
| #include <haproxy/applet.h> |
| #include <haproxy/buf.h> |
| #include <haproxy/cli.h> |
| #include <haproxy/clock.h> |
| #include <haproxy/debug.h> |
| #include <haproxy/fd.h> |
| #include <haproxy/global.h> |
| #include <haproxy/hlua.h> |
| #include <haproxy/http_ana.h> |
| #include <haproxy/log.h> |
| #include <haproxy/net_helper.h> |
| #include <haproxy/sc_strm.h> |
| #include <haproxy/stconn.h> |
| #include <haproxy/task.h> |
| #include <haproxy/thread.h> |
| #include <haproxy/time.h> |
| #include <haproxy/tools.h> |
| #include <import/ist.h> |
| |
| |
| /* The dump state is made of: |
| * - num_thread on the lowest 15 bits |
| * - a SYNC flag on bit 15 (waiting for sync start) |
| * - number of participating threads on bits 16-30 |
| * Initiating a dump consists in setting it to SYNC and incrementing the |
| * num_thread part when entering the function. The first thread periodically |
| * recounts active threads and compares it to the ready ones, and clears SYNC |
| * and sets the number of participants to the value found, which serves as a |
| * start signal. A thread finished dumping looks up the TID of the next active |
| * thread after it and writes it in the lowest part. If there's none, it sets |
| * the thread counter to the number of participants and resets that part, |
| * which serves as an end-of-dump signal. All threads decrement the num_thread |
| * part. Then all threads wait for the value to reach zero. Only used when |
| * USE_THREAD_DUMP is set. |
| */ |
| #define THREAD_DUMP_TMASK 0x00007FFFU |
| #define THREAD_DUMP_FSYNC 0x00008000U |
| #define THREAD_DUMP_PMASK 0x7FFF0000U |
| |
| volatile unsigned int thread_dump_state = 0; |
| unsigned int panic_started = 0; |
| unsigned int debug_commands_issued = 0; |
| |
| /* dumps a backtrace of the current thread that is appended to buffer <buf>. |
| * Lines are prefixed with the string <prefix> which may be empty (used for |
| * indenting). It is recommended to use this at a function's tail so that |
| * the function does not appear in the call stack. The <dump> argument |
| * indicates what dump state to start from, and should usually be zero. It |
| * may be among the following values: |
| * - 0: search usual callers before step 1, or directly jump to 2 |
| * - 1: skip usual callers before step 2 |
| * - 2: dump until polling loop, scheduler, or main() (excluded) |
| * - 3: end |
| * - 4-7: like 0 but stops *after* main. |
| */ |
| void ha_dump_backtrace(struct buffer *buf, const char *prefix, int dump) |
| { |
| struct buffer bak; |
| char pfx2[100]; |
| void *callers[100]; |
| int j, nptrs; |
| const void *addr; |
| |
| nptrs = my_backtrace(callers, sizeof(callers)/sizeof(*callers)); |
| if (!nptrs) |
| return; |
| |
| if (snprintf(pfx2, sizeof(pfx2), "%s| ", prefix) > sizeof(pfx2)) |
| pfx2[0] = 0; |
| |
| /* The call backtrace_symbols_fd(callers, nptrs, STDOUT_FILENO would |
| * produce similar output to the following: |
| */ |
| chunk_appendf(buf, "%scall trace(%d):\n", prefix, nptrs); |
| for (j = 0; (j < nptrs || (dump & 3) < 2); j++) { |
| if (j == nptrs && !(dump & 3)) { |
| /* we failed to spot the starting point of the |
| * dump, let's start over dumping everything we |
| * have. |
| */ |
| dump += 2; |
| j = 0; |
| } |
| bak = *buf; |
| dump_addr_and_bytes(buf, pfx2, callers[j], 8); |
| addr = resolve_sym_name(buf, ": ", callers[j]); |
| if ((dump & 3) == 0) { |
| /* dump not started, will start *after* |
| * ha_thread_dump_all_to_trash, ha_panic and ha_backtrace_to_stderr |
| */ |
| if (addr == ha_thread_dump_all_to_trash || addr == ha_panic || |
| addr == ha_backtrace_to_stderr) |
| dump++; |
| *buf = bak; |
| continue; |
| } |
| |
| if ((dump & 3) == 1) { |
| /* starting */ |
| if (addr == ha_thread_dump_all_to_trash || addr == ha_panic || |
| addr == ha_backtrace_to_stderr) { |
| *buf = bak; |
| continue; |
| } |
| dump++; |
| } |
| |
| if ((dump & 3) == 2) { |
| /* still dumping */ |
| if (dump == 6) { |
| /* we only stop *after* main and we must send the LF */ |
| if (addr == main) { |
| j = nptrs; |
| dump++; |
| } |
| } |
| else if (addr == run_poll_loop || addr == main || addr == run_tasks_from_lists) { |
| dump++; |
| *buf = bak; |
| break; |
| } |
| } |
| /* OK, line dumped */ |
| chunk_appendf(buf, "\n"); |
| } |
| } |
| |
| /* dump a backtrace of current thread's stack to stderr. */ |
| void ha_backtrace_to_stderr(void) |
| { |
| char area[2048]; |
| struct buffer b = b_make(area, sizeof(area), 0, 0); |
| |
| ha_dump_backtrace(&b, " ", 4); |
| if (b.data) |
| DISGUISE(write(2, b.area, b.data)); |
| } |
| |
| /* Dumps to the buffer some known information for the desired thread, and |
| * optionally extra info for the current thread. The dump will be appended to |
| * the buffer, so the caller is responsible for preliminary initializing it. |
| * The calling thread ID needs to be passed in <calling_tid> to display a star |
| * in front of the calling thread's line (usually it's tid). Any stuck thread |
| * is also prefixed with a '>'. |
| * It must be called under thread isolation. |
| */ |
| void ha_thread_dump(struct buffer *buf, int thr, int calling_tid) |
| { |
| unsigned long thr_bit = ha_thread_info[thr].ltid_bit; |
| unsigned long long p = ha_thread_ctx[thr].prev_cpu_time; |
| unsigned long long n = now_cpu_time_thread(thr); |
| int stuck = !!(ha_thread_ctx[thr].flags & TH_FL_STUCK); |
| int tgrp = ha_thread_info[thr].tgid; |
| |
| chunk_appendf(buf, |
| "%c%cThread %-2u: id=0x%llx act=%d glob=%d wq=%d rq=%d tl=%d tlsz=%d rqsz=%d\n" |
| " %2u/%-2u stuck=%d prof=%d", |
| (thr == calling_tid) ? '*' : ' ', stuck ? '>' : ' ', thr + 1, |
| ha_get_pthread_id(thr), |
| thread_has_tasks(), |
| !eb_is_empty(&ha_thread_ctx[thr].rqueue_shared), |
| !eb_is_empty(&ha_thread_ctx[thr].timers), |
| !eb_is_empty(&ha_thread_ctx[thr].rqueue), |
| !(LIST_ISEMPTY(&ha_thread_ctx[thr].tasklets[TL_URGENT]) && |
| LIST_ISEMPTY(&ha_thread_ctx[thr].tasklets[TL_NORMAL]) && |
| LIST_ISEMPTY(&ha_thread_ctx[thr].tasklets[TL_BULK]) && |
| MT_LIST_ISEMPTY(&ha_thread_ctx[thr].shared_tasklet_list)), |
| ha_thread_ctx[thr].tasks_in_list, |
| ha_thread_ctx[thr].rq_total, |
| ha_thread_info[thr].tgid, ha_thread_info[thr].ltid + 1, |
| stuck, |
| !!(th_ctx->flags & TH_FL_TASK_PROFILING)); |
| |
| chunk_appendf(buf, |
| " harmless=%d wantrdv=%d", |
| !!(_HA_ATOMIC_LOAD(&ha_tgroup_ctx[tgrp-1].threads_harmless) & thr_bit), |
| !!(th_ctx->flags & TH_FL_TASK_PROFILING)); |
| |
| chunk_appendf(buf, "\n"); |
| chunk_appendf(buf, " cpu_ns: poll=%llu now=%llu diff=%llu\n", p, n, n-p); |
| |
| /* this is the end of what we can dump from outside the current thread */ |
| |
| if (thr != tid) |
| return; |
| |
| chunk_appendf(buf, " curr_task="); |
| ha_task_dump(buf, th_ctx->current, " "); |
| |
| if (stuck) { |
| /* We only emit the backtrace for stuck threads in order not to |
| * waste precious output buffer space with non-interesting data. |
| * Please leave this as the last instruction in this function |
| * so that the compiler uses tail merging and the current |
| * function does not appear in the stack. |
| */ |
| ha_dump_backtrace(buf, " ", 0); |
| } |
| } |
| |
| |
| /* dumps into the buffer some information related to task <task> (which may |
| * either be a task or a tasklet, and prepend each line except the first one |
| * with <pfx>. The buffer is only appended and the first output starts by the |
| * pointer itself. The caller is responsible for making sure the task is not |
| * going to vanish during the dump. |
| */ |
| void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx) |
| { |
| const struct stream *s = NULL; |
| const struct appctx __maybe_unused *appctx = NULL; |
| struct hlua __maybe_unused *hlua = NULL; |
| const struct stconn *sc; |
| |
| if (!task) { |
| chunk_appendf(buf, "0\n"); |
| return; |
| } |
| |
| if (TASK_IS_TASKLET(task)) |
| chunk_appendf(buf, |
| "%p (tasklet) calls=%u\n", |
| task, |
| task->calls); |
| else |
| chunk_appendf(buf, |
| "%p (task) calls=%u last=%llu%s\n", |
| task, |
| task->calls, |
| task->wake_date ? (unsigned long long)(now_mono_time() - task->wake_date) : 0, |
| task->wake_date ? " ns ago" : ""); |
| |
| chunk_appendf(buf, "%s fct=%p(", pfx, task->process); |
| resolve_sym_name(buf, NULL, task->process); |
| chunk_appendf(buf,") ctx=%p", task->context); |
| |
| if (task->process == task_run_applet && (appctx = task->context)) |
| chunk_appendf(buf, "(%s)\n", appctx->applet->name); |
| else |
| chunk_appendf(buf, "\n"); |
| |
| if (task->process == process_stream && task->context) |
| s = (struct stream *)task->context; |
| else if (task->process == task_run_applet && task->context && (sc = appctx_sc((struct appctx *)task->context))) |
| s = sc_strm(sc); |
| else if (task->process == sc_conn_io_cb && task->context) |
| s = sc_strm(((struct stconn *)task->context)); |
| |
| if (s) |
| stream_dump(buf, s, pfx, '\n'); |
| |
| #ifdef USE_LUA |
| hlua = NULL; |
| if (s && (hlua = s->hlua)) { |
| chunk_appendf(buf, "%sCurrent executing Lua from a stream analyser -- ", pfx); |
| } |
| else if (task->process == hlua_process_task && (hlua = task->context)) { |
| chunk_appendf(buf, "%sCurrent executing a Lua task -- ", pfx); |
| } |
| else if (task->process == task_run_applet && (appctx = task->context) && |
| (appctx->applet->fct == hlua_applet_tcp_fct)) { |
| chunk_appendf(buf, "%sCurrent executing a Lua TCP service -- ", pfx); |
| } |
| else if (task->process == task_run_applet && (appctx = task->context) && |
| (appctx->applet->fct == hlua_applet_http_fct)) { |
| chunk_appendf(buf, "%sCurrent executing a Lua HTTP service -- ", pfx); |
| } |
| |
| if (hlua && hlua->T) { |
| chunk_appendf(buf, "stack traceback:\n "); |
| append_prefixed_str(buf, hlua_traceback(hlua->T, "\n "), pfx, '\n', 0); |
| b_putchr(buf, '\n'); |
| } |
| else |
| b_putchr(buf, '\n'); |
| #endif |
| } |
| |
| /* This function dumps all profiling settings. It returns 0 if the output |
| * buffer is full and it needs to be called again, otherwise non-zero. |
| */ |
| static int cli_io_handler_show_threads(struct appctx *appctx) |
| { |
| struct stconn *sc = appctx_sc(appctx); |
| int thr; |
| |
| if (unlikely(sc_ic(sc)->flags & (CF_WRITE_ERROR|CF_SHUTW))) |
| return 1; |
| |
| if (appctx->st0) |
| thr = appctx->st1; |
| else |
| thr = 0; |
| |
| chunk_reset(&trash); |
| ha_thread_dump_all_to_trash(); |
| |
| if (applet_putchk(appctx, &trash) == -1) { |
| /* failed, try again */ |
| appctx->st1 = thr; |
| return 0; |
| } |
| return 1; |
| } |
| |
| #if defined(HA_HAVE_DUMP_LIBS) |
| /* parse a "show libs" command. It returns 1 if it emits anything otherwise zero. */ |
| static int debug_parse_cli_show_libs(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| if (!cli_has_level(appctx, ACCESS_LVL_OPER)) |
| return 1; |
| |
| chunk_reset(&trash); |
| if (dump_libs(&trash, 1)) |
| return cli_msg(appctx, LOG_INFO, trash.area); |
| else |
| return 0; |
| } |
| #endif |
| |
| /* dumps a state of all threads into the trash and on fd #2, then aborts. */ |
| void ha_panic() |
| { |
| if (HA_ATOMIC_FETCH_ADD(&panic_started, 1) != 0) { |
| /* a panic dump is already in progress, let's not disturb it, |
| * we'll be called via signal DEBUGSIG. By returning we may be |
| * able to leave a current signal handler (e.g. WDT) so that |
| * this will ensure more reliable signal delivery. |
| */ |
| return; |
| } |
| chunk_reset(&trash); |
| chunk_appendf(&trash, "Thread %u is about to kill the process.\n", tid + 1); |
| ha_thread_dump_all_to_trash(); |
| DISGUISE(write(2, trash.area, trash.data)); |
| for (;;) |
| abort(); |
| } |
| |
| /* Complain with message <msg> on stderr. If <counter> is not NULL, it is |
| * atomically incremented, and the message is only printed when the counter |
| * was zero, so that the message is only printed once. <taint> is only checked |
| * on bit 1, and will taint the process either for a bug (2) or warn (0). |
| */ |
| void complain(int *counter, const char *msg, int taint) |
| { |
| if (counter && _HA_ATOMIC_FETCH_ADD(counter, 1)) |
| return; |
| DISGUISE(write(2, msg, strlen(msg))); |
| if (taint & 2) |
| mark_tainted(TAINTED_BUG); |
| else |
| mark_tainted(TAINTED_WARN); |
| } |
| |
| /* parse a "debug dev exit" command. It always returns 1, though it should never return. */ |
| static int debug_parse_cli_exit(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int code = atoi(args[3]); |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| exit(code); |
| return 1; |
| } |
| |
| /* parse a "debug dev bug" command. It always returns 1, though it should never return. |
| * Note: we make sure not to make the function static so that it appears in the trace. |
| */ |
| int debug_parse_cli_bug(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| BUG_ON(one > zero); |
| return 1; |
| } |
| |
| /* parse a "debug dev warn" command. It always returns 1. |
| * Note: we make sure not to make the function static so that it appears in the trace. |
| */ |
| int debug_parse_cli_warn(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| WARN_ON(one > zero); |
| return 1; |
| } |
| |
| /* parse a "debug dev check" command. It always returns 1. |
| * Note: we make sure not to make the function static so that it appears in the trace. |
| */ |
| int debug_parse_cli_check(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| CHECK_IF(one > zero); |
| return 1; |
| } |
| |
| /* parse a "debug dev close" command. It always returns 1. */ |
| static int debug_parse_cli_close(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int fd; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| if (!*args[3]) |
| return cli_err(appctx, "Missing file descriptor number.\n"); |
| |
| fd = atoi(args[3]); |
| if (fd < 0 || fd >= global.maxsock) |
| return cli_err(appctx, "File descriptor out of range.\n"); |
| |
| if (!fdtab[fd].owner) |
| return cli_msg(appctx, LOG_INFO, "File descriptor was already closed.\n"); |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| fd_delete(fd); |
| return 1; |
| } |
| |
| /* this is meant to cause a deadlock when more than one task is running it or when run twice */ |
| static struct task *debug_run_cli_deadlock(struct task *task, void *ctx, unsigned int state) |
| { |
| static HA_SPINLOCK_T lock __maybe_unused; |
| |
| HA_SPIN_LOCK(OTHER_LOCK, &lock); |
| return NULL; |
| } |
| |
| /* parse a "debug dev deadlock" command. It always returns 1. */ |
| static int debug_parse_cli_deadlock(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int tasks; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| for (tasks = atoi(args[3]); tasks > 0; tasks--) { |
| struct task *t = task_new_on(tasks % global.nbthread); |
| if (!t) |
| continue; |
| t->process = debug_run_cli_deadlock; |
| t->context = NULL; |
| task_wakeup(t, TASK_WOKEN_INIT); |
| } |
| |
| return 1; |
| } |
| |
| /* parse a "debug dev delay" command. It always returns 1. */ |
| static int debug_parse_cli_delay(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int delay = atoi(args[3]); |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| usleep((long)delay * 1000); |
| return 1; |
| } |
| |
| /* parse a "debug dev log" command. It always returns 1. */ |
| static int debug_parse_cli_log(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int arg; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| chunk_reset(&trash); |
| for (arg = 3; *args[arg]; arg++) { |
| if (arg > 3) |
| chunk_strcat(&trash, " "); |
| chunk_strcat(&trash, args[arg]); |
| } |
| |
| send_log(NULL, LOG_INFO, "%s\n", trash.area); |
| return 1; |
| } |
| |
| /* parse a "debug dev loop" command. It always returns 1. */ |
| static int debug_parse_cli_loop(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| struct timeval deadline, curr; |
| int loop = atoi(args[3]); |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| gettimeofday(&curr, NULL); |
| tv_ms_add(&deadline, &curr, loop); |
| |
| while (tv_ms_cmp(&curr, &deadline) < 0) |
| gettimeofday(&curr, NULL); |
| |
| return 1; |
| } |
| |
| /* parse a "debug dev panic" command. It always returns 1, though it should never return. */ |
| static int debug_parse_cli_panic(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| ha_panic(); |
| return 1; |
| } |
| |
| /* parse a "debug dev exec" command. It always returns 1. */ |
| #if defined(DEBUG_DEV) |
| static int debug_parse_cli_exec(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int pipefd[2]; |
| int arg; |
| int pid; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| chunk_reset(&trash); |
| for (arg = 3; *args[arg]; arg++) { |
| if (arg > 3) |
| chunk_strcat(&trash, " "); |
| chunk_strcat(&trash, args[arg]); |
| } |
| |
| thread_isolate(); |
| if (pipe(pipefd) < 0) |
| goto fail_pipe; |
| |
| if (fd_set_cloexec(pipefd[0]) == -1) |
| goto fail_fcntl; |
| |
| if (fd_set_cloexec(pipefd[1]) == -1) |
| goto fail_fcntl; |
| |
| pid = fork(); |
| |
| if (pid < 0) |
| goto fail_fork; |
| else if (pid == 0) { |
| /* child */ |
| char *cmd[4] = { "/bin/sh", "-c", 0, 0 }; |
| |
| close(0); |
| dup2(pipefd[1], 1); |
| dup2(pipefd[1], 2); |
| |
| cmd[2] = trash.area; |
| execvp(cmd[0], cmd); |
| printf("execvp() failed\n"); |
| exit(1); |
| } |
| |
| /* parent */ |
| thread_release(); |
| close(pipefd[1]); |
| chunk_reset(&trash); |
| while (1) { |
| size_t ret = read(pipefd[0], trash.area + trash.data, trash.size - 20 - trash.data); |
| if (ret <= 0) |
| break; |
| trash.data += ret; |
| if (trash.data + 20 == trash.size) { |
| chunk_strcat(&trash, "\n[[[TRUNCATED]]]\n"); |
| break; |
| } |
| } |
| close(pipefd[0]); |
| waitpid(pid, NULL, WNOHANG); |
| trash.area[trash.data] = 0; |
| return cli_msg(appctx, LOG_INFO, trash.area); |
| |
| fail_fork: |
| fail_fcntl: |
| close(pipefd[0]); |
| close(pipefd[1]); |
| fail_pipe: |
| thread_release(); |
| return cli_err(appctx, "Failed to execute command.\n"); |
| } |
| #endif |
| |
| /* parse a "debug dev hex" command. It always returns 1. */ |
| static int debug_parse_cli_hex(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| unsigned long start, len; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| if (!*args[3]) |
| return cli_err(appctx, "Missing memory address to dump from.\n"); |
| |
| start = strtoul(args[3], NULL, 0); |
| if (!start) |
| return cli_err(appctx, "Will not dump from NULL address.\n"); |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| |
| /* by default, dump ~128 till next block of 16 */ |
| len = strtoul(args[4], NULL, 0); |
| if (!len) |
| len = ((start + 128) & -16) - start; |
| |
| chunk_reset(&trash); |
| dump_hex(&trash, " ", (const void *)start, len, 1); |
| trash.area[trash.data] = 0; |
| return cli_msg(appctx, LOG_INFO, trash.area); |
| } |
| |
| /* parse a "debug dev sym <addr>" command. It always returns 1. */ |
| static int debug_parse_cli_sym(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| unsigned long addr; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| if (!*args[3]) |
| return cli_err(appctx, "Missing memory address to be resolved.\n"); |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| |
| addr = strtoul(args[3], NULL, 0); |
| chunk_printf(&trash, "%#lx resolves to ", addr); |
| resolve_sym_name(&trash, NULL, (const void *)addr); |
| chunk_appendf(&trash, "\n"); |
| |
| return cli_msg(appctx, LOG_INFO, trash.area); |
| } |
| |
| /* parse a "debug dev tkill" command. It always returns 1. */ |
| static int debug_parse_cli_tkill(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int thr = 0; |
| int sig = SIGABRT; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| if (*args[3]) |
| thr = atoi(args[3]); |
| |
| if (thr < 0 || thr > global.nbthread) |
| return cli_err(appctx, "Thread number out of range (use 0 for current).\n"); |
| |
| if (*args[4]) |
| sig = atoi(args[4]); |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| if (thr) |
| ha_tkill(thr - 1, sig); |
| else |
| raise(sig); |
| return 1; |
| } |
| |
| /* hashes 'word' in "debug dev hash 'word' ". */ |
| static int debug_parse_cli_hash(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| char *msg = NULL; |
| |
| cli_dynmsg(appctx, LOG_INFO, memprintf(&msg, "%s\n", HA_ANON_CLI(args[3]))); |
| return 1; |
| } |
| |
| /* parse a "debug dev write" command. It always returns 1. */ |
| static int debug_parse_cli_write(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| unsigned long len; |
| |
| if (!*args[3]) |
| return cli_err(appctx, "Missing output size.\n"); |
| |
| len = strtoul(args[3], NULL, 0); |
| if (len >= trash.size) |
| return cli_err(appctx, "Output too large, must be <tune.bufsize.\n"); |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| |
| chunk_reset(&trash); |
| trash.data = len; |
| memset(trash.area, '.', trash.data); |
| trash.area[trash.data] = 0; |
| for (len = 64; len < trash.data; len += 64) |
| trash.area[len] = '\n'; |
| return cli_msg(appctx, LOG_INFO, trash.area); |
| } |
| |
| /* parse a "debug dev stream" command */ |
| /* |
| * debug dev stream [strm=<ptr>] [strm.f[{+-=}<flags>]] [txn.f[{+-=}<flags>]] \ |
| * [req.f[{+-=}<flags>]] [res.f[{+-=}<flags>]] \ |
| * [sif.f[{+-=<flags>]] [sib.f[{+-=<flags>]] \ |
| * [sif.s[=<state>]] [sib.s[=<state>]] |
| */ |
| static int debug_parse_cli_stream(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| struct stream *s = appctx_strm(appctx); |
| int arg; |
| void *ptr; |
| int size; |
| const char *word, *end; |
| struct ist name; |
| char *msg = NULL; |
| char *endarg; |
| unsigned long long old, new; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| ptr = NULL; size = 0; |
| |
| if (!*args[3]) { |
| return cli_err(appctx, |
| "Usage: debug dev stream { <obj> <op> <value> | wake }*\n" |
| " <obj> = {strm | strm.f | strm.x | scf.s | scb.s |\n" |
| " txn.f | req.f | req.r | req.w | res.f | res.r | res.w}\n" |
| " <op> = {'' (show) | '=' (assign) | '^' (xor) | '+' (or) | '-' (andnot)}\n" |
| " <value> = 'now' | 64-bit dec/hex integer (0x prefix supported)\n" |
| " 'wake' wakes the stream asssigned to 'strm' (default: current)\n" |
| ); |
| } |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| for (arg = 3; *args[arg]; arg++) { |
| old = 0; |
| end = word = args[arg]; |
| while (*end && *end != '=' && *end != '^' && *end != '+' && *end != '-') |
| end++; |
| name = ist2(word, end - word); |
| if (isteq(name, ist("strm"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s; size = sizeof(s); |
| } else if (isteq(name, ist("strm.f"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->flags; size = sizeof(s->flags); |
| } else if (isteq(name, ist("strm.x"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->conn_exp; size = sizeof(s->conn_exp); |
| } else if (isteq(name, ist("txn.f"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->txn->flags; size = sizeof(s->txn->flags); |
| } else if (isteq(name, ist("req.f"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->req.flags; size = sizeof(s->req.flags); |
| } else if (isteq(name, ist("res.f"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->res.flags; size = sizeof(s->res.flags); |
| } else if (isteq(name, ist("req.r"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->req.rex; size = sizeof(s->req.rex); |
| } else if (isteq(name, ist("res.r"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->res.rex; size = sizeof(s->res.rex); |
| } else if (isteq(name, ist("req.w"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->req.wex; size = sizeof(s->req.wex); |
| } else if (isteq(name, ist("res.w"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->res.wex; size = sizeof(s->res.wex); |
| } else if (isteq(name, ist("scf.s"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->scf->state; size = sizeof(s->scf->state); |
| } else if (isteq(name, ist("scb.s"))) { |
| ptr = (!s || !may_access(s)) ? NULL : &s->scf->state; size = sizeof(s->scb->state); |
| } else if (isteq(name, ist("wake"))) { |
| if (s && may_access(s) && may_access((void *)s + sizeof(*s) - 1)) |
| task_wakeup(s->task, TASK_WOKEN_TIMER|TASK_WOKEN_IO|TASK_WOKEN_MSG); |
| continue; |
| } else |
| return cli_dynerr(appctx, memprintf(&msg, "Unsupported field name: '%s'.\n", word)); |
| |
| /* read previous value */ |
| if ((s || ptr == &s) && ptr && may_access(ptr) && may_access(ptr + size - 1)) { |
| if (size == 8) |
| old = read_u64(ptr); |
| else if (size == 4) |
| old = read_u32(ptr); |
| else if (size == 2) |
| old = read_u16(ptr); |
| else |
| old = *(const uint8_t *)ptr; |
| } else { |
| memprintf(&msg, |
| "%sSkipping inaccessible pointer %p for field '%.*s'.\n", |
| msg ? msg : "", ptr, (int)(end - word), word); |
| continue; |
| } |
| |
| /* parse the new value . */ |
| new = strtoll(end + 1, &endarg, 0); |
| if (end[1] && *endarg) { |
| if (strcmp(end + 1, "now") == 0) |
| new = now_ms; |
| else { |
| memprintf(&msg, |
| "%sIgnoring unparsable value '%s' for field '%.*s'.\n", |
| msg ? msg : "", end + 1, (int)(end - word), word); |
| continue; |
| } |
| } |
| |
| switch (*end) { |
| case '\0': /* show */ |
| memprintf(&msg, "%s%.*s=%#llx ", msg ? msg : "", (int)(end - word), word, old); |
| new = old; // do not change the value |
| break; |
| |
| case '=': /* set */ |
| break; |
| |
| case '^': /* XOR */ |
| new = old ^ new; |
| break; |
| |
| case '+': /* OR */ |
| new = old | new; |
| break; |
| |
| case '-': /* AND NOT */ |
| new = old & ~new; |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* write the new value */ |
| if (new != old) { |
| if (size == 8) |
| write_u64(ptr, new); |
| else if (size == 4) |
| write_u32(ptr, new); |
| else if (size == 2) |
| write_u16(ptr, new); |
| else |
| *(uint8_t *)ptr = new; |
| } |
| } |
| |
| if (msg && *msg) |
| return cli_dynmsg(appctx, LOG_INFO, msg); |
| return 1; |
| } |
| |
| static struct task *debug_task_handler(struct task *t, void *ctx, unsigned int state) |
| { |
| unsigned long *tctx = ctx; // [0] = #tasks, [1] = inter, [2+] = { tl | (tsk+1) } |
| unsigned long inter = tctx[1]; |
| unsigned long rnd; |
| |
| t->expire = tick_add(now_ms, inter); |
| |
| /* half of the calls will wake up another entry */ |
| rnd = statistical_prng(); |
| if (rnd & 1) { |
| rnd >>= 1; |
| rnd %= tctx[0]; |
| rnd = tctx[rnd + 2]; |
| |
| if (rnd & 1) |
| task_wakeup((struct task *)(rnd - 1), TASK_WOKEN_MSG); |
| else |
| tasklet_wakeup((struct tasklet *)rnd); |
| } |
| return t; |
| } |
| |
| static struct task *debug_tasklet_handler(struct task *t, void *ctx, unsigned int state) |
| { |
| unsigned long *tctx = ctx; // [0] = #tasks, [1] = inter, [2+] = { tl | (tsk+1) } |
| unsigned long rnd; |
| int i; |
| |
| /* wake up two random entries */ |
| for (i = 0; i < 2; i++) { |
| rnd = statistical_prng() % tctx[0]; |
| rnd = tctx[rnd + 2]; |
| |
| if (rnd & 1) |
| task_wakeup((struct task *)(rnd - 1), TASK_WOKEN_MSG); |
| else |
| tasklet_wakeup((struct tasklet *)rnd); |
| } |
| return t; |
| } |
| |
| /* parse a "debug dev sched" command |
| * debug dev sched {task|tasklet} [count=<count>] [mask=<mask>] [single=<single>] [inter=<inter>] |
| */ |
| static int debug_parse_cli_sched(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| int arg; |
| void *ptr; |
| int size; |
| const char *word, *end; |
| struct ist name; |
| char *msg = NULL; |
| char *endarg; |
| unsigned long long new; |
| unsigned long count = 0; |
| unsigned long thrid = tid; |
| unsigned int inter = 0; |
| unsigned long i; |
| int mode = 0; // 0 = tasklet; 1 = task |
| unsigned long *tctx; // [0] = #tasks, [1] = inter, [2+] = { tl | (tsk+1) } |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| ptr = NULL; size = 0; |
| |
| if (strcmp(args[3], "task") != 0 && strcmp(args[3], "tasklet") != 0) { |
| return cli_err(appctx, |
| "Usage: debug dev sched {task|tasklet} { <obj> = <value> }*\n" |
| " <obj> = {count | tid | inter }\n" |
| " <value> = 64-bit dec/hex integer (0x prefix supported)\n" |
| ); |
| } |
| |
| mode = strcmp(args[3], "task") == 0; |
| |
| _HA_ATOMIC_INC(&debug_commands_issued); |
| for (arg = 4; *args[arg]; arg++) { |
| end = word = args[arg]; |
| while (*end && *end != '=' && *end != '^' && *end != '+' && *end != '-') |
| end++; |
| name = ist2(word, end - word); |
| if (isteq(name, ist("count"))) { |
| ptr = &count; size = sizeof(count); |
| } else if (isteq(name, ist("tid"))) { |
| ptr = &thrid; size = sizeof(thrid); |
| } else if (isteq(name, ist("inter"))) { |
| ptr = &inter; size = sizeof(inter); |
| } else |
| return cli_dynerr(appctx, memprintf(&msg, "Unsupported setting: '%s'.\n", word)); |
| |
| /* parse the new value . */ |
| new = strtoll(end + 1, &endarg, 0); |
| if (end[1] && *endarg) { |
| memprintf(&msg, |
| "%sIgnoring unparsable value '%s' for field '%.*s'.\n", |
| msg ? msg : "", end + 1, (int)(end - word), word); |
| continue; |
| } |
| |
| /* write the new value */ |
| if (size == 8) |
| write_u64(ptr, new); |
| else if (size == 4) |
| write_u32(ptr, new); |
| else if (size == 2) |
| write_u16(ptr, new); |
| else |
| *(uint8_t *)ptr = new; |
| } |
| |
| tctx = calloc(sizeof(*tctx), count + 2); |
| if (!tctx) |
| goto fail; |
| |
| tctx[0] = (unsigned long)count; |
| tctx[1] = (unsigned long)inter; |
| |
| if (thrid >= global.nbthread) |
| thrid = tid; |
| |
| for (i = 0; i < count; i++) { |
| /* now, if poly or mask was set, tmask corresponds to the |
| * valid thread mask to use, otherwise it remains zero. |
| */ |
| //printf("%lu: mode=%d mask=%#lx\n", i, mode, tmask); |
| if (mode == 0) { |
| struct tasklet *tl = tasklet_new(); |
| |
| if (!tl) |
| goto fail; |
| |
| tl->tid = thrid; |
| tl->process = debug_tasklet_handler; |
| tl->context = tctx; |
| tctx[i + 2] = (unsigned long)tl; |
| } else { |
| struct task *task = task_new_on(thrid); |
| |
| if (!task) |
| goto fail; |
| |
| task->process = debug_task_handler; |
| task->context = tctx; |
| tctx[i + 2] = (unsigned long)task + 1; |
| } |
| } |
| |
| /* start the tasks and tasklets */ |
| for (i = 0; i < count; i++) { |
| unsigned long ctx = tctx[i + 2]; |
| |
| if (ctx & 1) |
| task_wakeup((struct task *)(ctx - 1), TASK_WOKEN_INIT); |
| else |
| tasklet_wakeup((struct tasklet *)ctx); |
| } |
| |
| if (msg && *msg) |
| return cli_dynmsg(appctx, LOG_INFO, msg); |
| return 1; |
| |
| fail: |
| /* free partially allocated entries */ |
| for (i = 0; tctx && i < count; i++) { |
| unsigned long ctx = tctx[i + 2]; |
| |
| if (!ctx) |
| break; |
| |
| if (ctx & 1) |
| task_destroy((struct task *)(ctx - 1)); |
| else |
| tasklet_free((struct tasklet *)ctx); |
| } |
| |
| free(tctx); |
| return cli_err(appctx, "Not enough memory"); |
| } |
| |
| /* CLI state for "debug dev fd" */ |
| struct dev_fd_ctx { |
| int start_fd; |
| }; |
| |
| /* CLI parser for the "debug dev fd" command. The current FD to restart from is |
| * stored in a struct dev_fd_ctx pointed to by svcctx. |
| */ |
| static int debug_parse_cli_fd(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| struct dev_fd_ctx *ctx = applet_reserve_svcctx(appctx, sizeof(*ctx)); |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_OPER)) |
| return 1; |
| |
| /* start at fd #0 */ |
| ctx->start_fd = 0; |
| return 0; |
| } |
| |
| /* CLI I/O handler for the "debug dev fd" command. Dumps all FDs that are |
| * accessible from the process but not known from fdtab. The FD number to |
| * restart from is stored in a struct dev_fd_ctx pointed to by svcctx. |
| */ |
| static int debug_iohandler_fd(struct appctx *appctx) |
| { |
| struct dev_fd_ctx *ctx = appctx->svcctx; |
| struct stconn *sc = appctx_sc(appctx); |
| struct sockaddr_storage sa; |
| struct stat statbuf; |
| socklen_t salen, vlen; |
| int ret1, ret2, port; |
| char *addrstr; |
| int ret = 1; |
| int i, fd; |
| |
| if (unlikely(sc_ic(sc)->flags & (CF_WRITE_ERROR|CF_SHUTW))) |
| goto end; |
| |
| chunk_reset(&trash); |
| |
| thread_isolate(); |
| |
| /* we have two inner loops here, one for the proxy, the other one for |
| * the buffer. |
| */ |
| for (fd = ctx->start_fd; fd < global.maxsock; fd++) { |
| /* check for FD's existence */ |
| ret1 = fcntl(fd, F_GETFD, 0); |
| if (ret1 == -1) |
| continue; // not known to the process |
| if (fdtab[fd].owner) |
| continue; // well-known |
| |
| /* OK we're seeing an orphan let's try to retrieve as much |
| * information as possible about it. |
| */ |
| chunk_printf(&trash, "%5d", fd); |
| |
| if (fstat(fd, &statbuf) != -1) { |
| chunk_appendf(&trash, " type=%s mod=%04o dev=%#llx siz=%#llx uid=%lld gid=%lld fs=%#llx ino=%#llx", |
| isatty(fd) ? "tty.": |
| S_ISREG(statbuf.st_mode) ? "file": |
| S_ISDIR(statbuf.st_mode) ? "dir.": |
| S_ISCHR(statbuf.st_mode) ? "chr.": |
| S_ISBLK(statbuf.st_mode) ? "blk.": |
| S_ISFIFO(statbuf.st_mode) ? "pipe": |
| S_ISLNK(statbuf.st_mode) ? "link": |
| S_ISSOCK(statbuf.st_mode) ? "sock": |
| #ifdef USE_EPOLL |
| epoll_wait(fd, NULL, 0, 0) != -1 || errno != EBADF ? "epol": |
| #endif |
| "????", |
| (uint)statbuf.st_mode & 07777, |
| |
| (ullong)statbuf.st_rdev, |
| (ullong)statbuf.st_size, |
| (ullong)statbuf.st_uid, |
| (ullong)statbuf.st_gid, |
| |
| (ullong)statbuf.st_dev, |
| (ullong)statbuf.st_ino); |
| } |
| |
| chunk_appendf(&trash, " getfd=%s+%#x", |
| (ret1 & FD_CLOEXEC) ? "cloex" : "", |
| ret1 &~ FD_CLOEXEC); |
| |
| /* FD options */ |
| ret2 = fcntl(fd, F_GETFL, 0); |
| if (ret2) { |
| chunk_appendf(&trash, " getfl=%s", |
| (ret1 & 3) >= 2 ? "O_RDWR" : |
| (ret1 & 1) ? "O_WRONLY" : "O_RDONLY"); |
| |
| for (i = 2; i < 32; i++) { |
| if (!(ret2 & (1UL << i))) |
| continue; |
| switch (1UL << i) { |
| case O_CREAT: chunk_appendf(&trash, ",O_CREAT"); break; |
| case O_EXCL: chunk_appendf(&trash, ",O_EXCL"); break; |
| case O_NOCTTY: chunk_appendf(&trash, ",O_NOCTTY"); break; |
| case O_TRUNC: chunk_appendf(&trash, ",O_TRUNC"); break; |
| case O_APPEND: chunk_appendf(&trash, ",O_APPEND"); break; |
| #ifdef O_ASYNC |
| case O_ASYNC: chunk_appendf(&trash, ",O_ASYNC"); break; |
| #endif |
| #ifdef O_DIRECT |
| case O_DIRECT: chunk_appendf(&trash, ",O_DIRECT"); break; |
| #endif |
| #ifdef O_NOATIME |
| case O_NOATIME: chunk_appendf(&trash, ",O_NOATIME"); break; |
| #endif |
| } |
| } |
| } |
| |
| vlen = sizeof(ret2); |
| ret1 = getsockopt(fd, SOL_SOCKET, SO_TYPE, &ret2, &vlen); |
| if (ret1 != -1) |
| chunk_appendf(&trash, " so_type=%d", ret2); |
| |
| vlen = sizeof(ret2); |
| ret1 = getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ret2, &vlen); |
| if (ret1 != -1) |
| chunk_appendf(&trash, " so_accept=%d", ret2); |
| |
| vlen = sizeof(ret2); |
| ret1 = getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret2, &vlen); |
| if (ret1 != -1) |
| chunk_appendf(&trash, " so_error=%d", ret2); |
| |
| salen = sizeof(sa); |
| if (getsockname(fd, (struct sockaddr *)&sa, &salen) != -1) { |
| if (sa.ss_family == AF_INET) |
| port = ntohs(((const struct sockaddr_in *)&sa)->sin_port); |
| else if (sa.ss_family == AF_INET6) |
| port = ntohs(((const struct sockaddr_in6 *)&sa)->sin6_port); |
| else |
| port = 0; |
| addrstr = sa2str(&sa, port, 0); |
| chunk_appendf(&trash, " laddr=%s", addrstr); |
| free(addrstr); |
| } |
| |
| salen = sizeof(sa); |
| if (getpeername(fd, (struct sockaddr *)&sa, &salen) != -1) { |
| if (sa.ss_family == AF_INET) |
| port = ntohs(((const struct sockaddr_in *)&sa)->sin_port); |
| else if (sa.ss_family == AF_INET6) |
| port = ntohs(((const struct sockaddr_in6 *)&sa)->sin6_port); |
| else |
| port = 0; |
| addrstr = sa2str(&sa, port, 0); |
| chunk_appendf(&trash, " raddr=%s", addrstr); |
| free(addrstr); |
| } |
| |
| chunk_appendf(&trash, "\n"); |
| |
| if (applet_putchk(appctx, &trash) == -1) { |
| ctx->start_fd = fd; |
| ret = 0; |
| break; |
| } |
| } |
| |
| thread_release(); |
| end: |
| return ret; |
| } |
| |
| #if defined(DEBUG_MEM_STATS) |
| |
| /* CLI state for "debug dev memstats" */ |
| struct dev_mem_ctx { |
| struct mem_stats *start, *stop; /* begin/end of dump */ |
| int show_all; /* show all entries if non-null */ |
| int width; |
| }; |
| |
| /* CLI parser for the "debug dev memstats" command. Sets a dev_mem_ctx shown above. */ |
| static int debug_parse_cli_memstats(char **args, char *payload, struct appctx *appctx, void *private) |
| { |
| struct dev_mem_ctx *ctx = applet_reserve_svcctx(appctx, sizeof(*ctx)); |
| int arg; |
| |
| extern __attribute__((__weak__)) struct mem_stats __start_mem_stats; |
| extern __attribute__((__weak__)) struct mem_stats __stop_mem_stats; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_OPER)) |
| return 1; |
| |
| for (arg = 3; *args[arg]; arg++) { |
| if (strcmp(args[arg], "reset") == 0) { |
| struct mem_stats *ptr; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| for (ptr = &__start_mem_stats; ptr < &__stop_mem_stats; ptr++) { |
| _HA_ATOMIC_STORE(&ptr->calls, 0); |
| _HA_ATOMIC_STORE(&ptr->size, 0); |
| } |
| return 1; |
| } |
| else if (strcmp(args[arg], "all") == 0) { |
| ctx->show_all = 1; |
| continue; |
| } |
| else |
| return cli_err(appctx, "Expects either 'reset' or 'all'.\n"); |
| } |
| |
| /* otherwise proceed with the dump from p0 to p1 */ |
| ctx->start = &__start_mem_stats; |
| ctx->stop = &__stop_mem_stats; |
| ctx->width = 0; |
| return 0; |
| } |
| |
| /* CLI I/O handler for the "debug dev memstats" command using a dev_mem_ctx |
| * found in appctx->svcctx. Dumps all mem_stats structs referenced by pointers |
| * located between ->start and ->stop. Dumps all entries if ->show_all != 0, |
| * otherwise only non-zero calls. |
| */ |
| static int debug_iohandler_memstats(struct appctx *appctx) |
| { |
| struct dev_mem_ctx *ctx = appctx->svcctx; |
| struct stconn *sc = appctx_sc(appctx); |
| struct mem_stats *ptr; |
| int ret = 1; |
| |
| if (unlikely(sc_ic(sc)->flags & (CF_WRITE_ERROR|CF_SHUTW))) |
| goto end; |
| |
| if (!ctx->width) { |
| /* we don't know the first column's width, let's compute it |
| * now based on a first pass on printable entries and their |
| * expected width (approximated). |
| */ |
| for (ptr = ctx->start; ptr != ctx->stop; ptr++) { |
| const char *p, *name; |
| int w = 0; |
| char tmp; |
| |
| if (!ptr->size && !ptr->calls && !ctx->show_all) |
| continue; |
| |
| for (p = name = ptr->caller.file; *p; p++) { |
| if (*p == '/') |
| name = p + 1; |
| } |
| |
| if (ctx->show_all) |
| w = snprintf(&tmp, 0, "%s(%s:%d) ", ptr->caller.func, name, ptr->caller.line); |
| else |
| w = snprintf(&tmp, 0, "%s:%d ", name, ptr->caller.line); |
| |
| if (w > ctx->width) |
| ctx->width = w; |
| } |
| } |
| |
| /* we have two inner loops here, one for the proxy, the other one for |
| * the buffer. |
| */ |
| for (ptr = ctx->start; ptr != ctx->stop; ptr++) { |
| const char *type; |
| const char *name; |
| const char *p; |
| const char *info = NULL; |
| const char *func = NULL; |
| |
| if (!ptr->size && !ptr->calls && !ctx->show_all) |
| continue; |
| |
| /* basename only */ |
| for (p = name = ptr->caller.file; *p; p++) { |
| if (*p == '/') |
| name = p + 1; |
| } |
| |
| func = ptr->caller.func; |
| |
| switch (ptr->caller.what) { |
| case MEM_STATS_TYPE_CALLOC: type = "CALLOC"; break; |
| case MEM_STATS_TYPE_FREE: type = "FREE"; break; |
| case MEM_STATS_TYPE_MALLOC: type = "MALLOC"; break; |
| case MEM_STATS_TYPE_REALLOC: type = "REALLOC"; break; |
| case MEM_STATS_TYPE_STRDUP: type = "STRDUP"; break; |
| case MEM_STATS_TYPE_P_ALLOC: type = "P_ALLOC"; if (ptr->extra) info = ((const struct pool_head *)ptr->extra)->name; break; |
| case MEM_STATS_TYPE_P_FREE: type = "P_FREE"; if (ptr->extra) info = ((const struct pool_head *)ptr->extra)->name; break; |
| default: type = "UNSET"; break; |
| } |
| |
| //chunk_printf(&trash, |
| // "%20s:%-5d %7s size: %12lu calls: %9lu size/call: %6lu\n", |
| // name, ptr->line, type, |
| // (unsigned long)ptr->size, (unsigned long)ptr->calls, |
| // (unsigned long)(ptr->calls ? (ptr->size / ptr->calls) : 0)); |
| |
| chunk_reset(&trash); |
| if (ctx->show_all) |
| chunk_appendf(&trash, "%s(", func); |
| |
| chunk_appendf(&trash, "%s:%d", name, ptr->caller.line); |
| |
| if (ctx->show_all) |
| chunk_appendf(&trash, ")"); |
| |
| while (trash.data < ctx->width) |
| trash.area[trash.data++] = ' '; |
| |
| chunk_appendf(&trash, "%7s size: %12lu calls: %9lu size/call: %6lu %s\n", |
| type, |
| (unsigned long)ptr->size, (unsigned long)ptr->calls, |
| (unsigned long)(ptr->calls ? (ptr->size / ptr->calls) : 0), |
| info ? info : ""); |
| |
| if (applet_putchk(appctx, &trash) == -1) { |
| ctx->start = ptr; |
| ret = 0; |
| break; |
| } |
| } |
| |
| end: |
| return ret; |
| } |
| |
| #endif |
| |
| #ifndef USE_THREAD_DUMP |
| |
| /* This function dumps all threads' state to the trash. This version is the |
| * most basic one, which doesn't inspect other threads. |
| */ |
| void ha_thread_dump_all_to_trash() |
| { |
| unsigned int thr; |
| |
| for (thr = 0; thr < global.nbthread; thr++) |
| ha_thread_dump(&trash, thr, tid); |
| } |
| |
| #else /* below USE_THREAD_DUMP is set */ |
| |
| /* ID of the thread requesting the dump */ |
| static unsigned int thread_dump_tid; |
| |
| /* points to the buffer where the dump functions should write. It must |
| * have already been initialized by the requester. Nothing is done if |
| * it's NULL. |
| */ |
| struct buffer *thread_dump_buffer = NULL; |
| |
| /* initiates a thread dump */ |
| void ha_thread_dump_all_to_trash() |
| { |
| unsigned int old; |
| |
| /* initiate a dump starting from first thread. Use a CAS so that we do |
| * not wait if we're not the first one, but we wait for a previous dump |
| * to finish. |
| */ |
| while (1) { |
| old = 0; |
| if (HA_ATOMIC_CAS(&thread_dump_state, &old, THREAD_DUMP_FSYNC)) |
| break; |
| ha_thread_relax(); |
| } |
| thread_dump_buffer = &trash; |
| thread_dump_tid = tid; |
| ha_tkillall(DEBUGSIG); |
| |
| /* the call above contains a raise() so we're certain to return after |
| * returning from the sighandler, hence when the dump is complete. |
| */ |
| } |
| |
| /* handles DEBUGSIG to dump the state of the thread it's working on. This is |
| * appended at the end of thread_dump_buffer which must be protected against |
| * reentrance from different threads (a thread-local buffer works fine). |
| */ |
| void debug_handler(int sig, siginfo_t *si, void *arg) |
| { |
| int harmless = is_thread_harmless(); |
| int running = 0; |
| uint prev; |
| uint next; |
| |
| /* first, let's check it's really for us and that we didn't just get |
| * a spurious DEBUGSIG. |
| */ |
| if (!_HA_ATOMIC_LOAD(&thread_dump_state)) |
| return; |
| |
| /* There are 5 phases in the dump process: |
| * 1- wait for all threads to sync or the first one to start |
| * 2- wait for our turn, i.e. when tid appears in lower bits. |
| * 3- perform the action if our tid is there |
| * 4- pass tid to the number of the next thread to dump or |
| * reset running counter if we're last one. |
| * 5- wait for running to be zero and decrement the count |
| */ |
| |
| /* wait for all previous threads to finish first */ |
| if (!harmless) |
| thread_harmless_now(); |
| |
| if (HA_ATOMIC_FETCH_ADD(&thread_dump_state, 1) == THREAD_DUMP_FSYNC) { |
| /* the first one which lands here is responsible for constantly |
| * recounting the number of active theads and switching from |
| * SYNC to DUMP. |
| */ |
| while (1) { |
| int first = -1; // first tid to dump |
| int thr; |
| |
| running = 0; |
| for (thr = 0; thr < global.nbthread; thr++) { |
| if (ha_thread_info[thr].tg->threads_enabled & ha_thread_info[thr].ltid_bit) { |
| running++; |
| if (first < 0) |
| first = thr; |
| } |
| } |
| |
| if ((HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_TMASK) == running) { |
| /* all threads are there, let's try to start */ |
| prev = THREAD_DUMP_FSYNC | running; |
| next = (running << 16) | first; |
| if (HA_ATOMIC_CAS(&thread_dump_state, &prev, next)) |
| break; |
| /* it failed! maybe a thread appeared late (e.g. during boot), let's |
| * recount. |
| */ |
| } |
| ha_thread_relax(); |
| } |
| } |
| |
| /* all threads: let's wait for the SYNC flag to disappear; tid is reset at |
| * the same time to the first valid tid to dump and pmask will reflect the |
| * number of participants. |
| */ |
| while (HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_FSYNC) |
| ha_thread_relax(); |
| |
| /* wait for our turn */ |
| while ((HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_TMASK) != tid) |
| ha_thread_relax(); |
| |
| /* make sure we don't count all that wait time against us */ |
| HA_ATOMIC_AND(&th_ctx->flags, ~TH_FL_STUCK); |
| |
| if (!harmless) |
| thread_harmless_end(); |
| |
| /* dump if needed */ |
| if (thread_dump_buffer) |
| ha_thread_dump(thread_dump_buffer, tid, thread_dump_tid); |
| |
| /* figure which is the next thread ID to dump among enabled ones. Note |
| * that this relies on the fact that we're not creating new threads in |
| * the middle of a dump, which is normally granted by the harmless bits |
| * anyway. |
| */ |
| for (next = tid + 1; next < global.nbthread; next++) { |
| if (unlikely(next >= MAX_THREADS)) { |
| /* just to please gcc 6.5 who guesses the ranges wrong. */ |
| continue; |
| } |
| |
| if (ha_thread_info[next].tg && |
| ha_thread_info[next].tg->threads_enabled & ha_thread_info[next].ltid_bit) |
| break; |
| } |
| |
| /* if there are threads left to dump, we atomically set the next one, |
| * otherwise we'll clear dump and set the thread part to the number of |
| * threads that need to disappear. |
| */ |
| if (next < global.nbthread) { |
| next = (HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_PMASK) | next; |
| HA_ATOMIC_STORE(&thread_dump_state, next); |
| } else { |
| thread_dump_buffer = NULL; // was the last one |
| running = (HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_PMASK) >> 16; |
| HA_ATOMIC_STORE(&thread_dump_state, running); |
| } |
| |
| /* now wait for all others to finish dumping: the lowest part will turn |
| * to zero. Then all others decrement the done part. |
| */ |
| if (!harmless) |
| thread_harmless_now(); |
| |
| /* wait for everyone to finish*/ |
| while (HA_ATOMIC_LOAD(&thread_dump_state) & THREAD_DUMP_PMASK) |
| ha_thread_relax(); |
| |
| /* make sure we don't count all that wait time against us */ |
| HA_ATOMIC_AND(&th_ctx->flags, ~TH_FL_STUCK); |
| |
| if (!harmless) |
| thread_harmless_end(); |
| |
| /* we're gone. Past this point anything can happen including another |
| * thread trying to re-trigger a dump, so thread_dump_buffer and |
| * thread_dump_tid may become invalid immediately after this call. |
| */ |
| HA_ATOMIC_SUB(&thread_dump_state, 1); |
| |
| /* mark the current thread as stuck to detect it upon next invocation |
| * if it didn't move. |
| */ |
| if (!harmless && |
| !(_HA_ATOMIC_LOAD(&th_ctx->flags) & TH_FL_SLEEPING)) |
| _HA_ATOMIC_OR(&th_ctx->flags, TH_FL_STUCK); |
| } |
| |
| static int init_debug_per_thread() |
| { |
| sigset_t set; |
| |
| /* unblock the DEBUGSIG signal we intend to use */ |
| sigemptyset(&set); |
| sigaddset(&set, DEBUGSIG); |
| ha_sigmask(SIG_UNBLOCK, &set, NULL); |
| return 1; |
| } |
| |
| static int init_debug() |
| { |
| struct sigaction sa; |
| void *callers[1]; |
| |
| /* calling backtrace() will access libgcc at runtime. We don't want to |
| * do it after the chroot, so let's perform a first call to have it |
| * ready in memory for later use. |
| */ |
| my_backtrace(callers, sizeof(callers)/sizeof(*callers)); |
| sa.sa_handler = NULL; |
| sa.sa_sigaction = debug_handler; |
| sigemptyset(&sa.sa_mask); |
| sa.sa_flags = SA_SIGINFO; |
| sigaction(DEBUGSIG, &sa, NULL); |
| return ERR_NONE; |
| } |
| |
| REGISTER_POST_CHECK(init_debug); |
| REGISTER_PER_THREAD_INIT(init_debug_per_thread); |
| |
| #endif /* USE_THREAD_DUMP */ |
| |
| /* register cli keywords */ |
| static struct cli_kw_list cli_kws = {{ },{ |
| {{ "debug", "dev", "bug", NULL }, "debug dev bug : call BUG_ON() and crash", debug_parse_cli_bug, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "check", NULL }, "debug dev check : call CHECK_IF() and possibly crash", debug_parse_cli_check, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "close", NULL }, "debug dev close <fd> : close this file descriptor", debug_parse_cli_close, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "deadlock", NULL }, "debug dev deadlock [nbtask] : deadlock between this number of tasks", debug_parse_cli_deadlock, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "delay", NULL }, "debug dev delay [ms] : sleep this long", debug_parse_cli_delay, NULL, NULL, NULL, ACCESS_EXPERT }, |
| #if defined(DEBUG_DEV) |
| {{ "debug", "dev", "exec", NULL }, "debug dev exec [cmd] ... : show this command's output", debug_parse_cli_exec, NULL, NULL, NULL, ACCESS_EXPERT }, |
| #endif |
| {{ "debug", "dev", "fd", NULL }, "debug dev fd : scan for rogue/unhandled FDs", debug_parse_cli_fd, debug_iohandler_fd, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "exit", NULL }, "debug dev exit [code] : immediately exit the process", debug_parse_cli_exit, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "hash", NULL }, "debug dev hash [msg] : return msg hashed if anon is set", debug_parse_cli_hash, NULL, NULL, NULL, 0 }, |
| {{ "debug", "dev", "hex", NULL }, "debug dev hex <addr> [len] : dump a memory area", debug_parse_cli_hex, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "log", NULL }, "debug dev log [msg] ... : send this msg to global logs", debug_parse_cli_log, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "loop", NULL }, "debug dev loop [ms] : loop this long", debug_parse_cli_loop, NULL, NULL, NULL, ACCESS_EXPERT }, |
| #if defined(DEBUG_MEM_STATS) |
| {{ "debug", "dev", "memstats", NULL }, "debug dev memstats [reset|all] : dump/reset memory statistics", debug_parse_cli_memstats, debug_iohandler_memstats, NULL, NULL, 0 }, |
| #endif |
| {{ "debug", "dev", "panic", NULL }, "debug dev panic : immediately trigger a panic", debug_parse_cli_panic, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "sched", NULL }, "debug dev sched {task|tasklet} [k=v]* : stress the scheduler", debug_parse_cli_sched, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "stream",NULL }, "debug dev stream [k=v]* : show/manipulate stream flags", debug_parse_cli_stream,NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "sym", NULL }, "debug dev sym <addr> : resolve symbol address", debug_parse_cli_sym, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "tkill", NULL }, "debug dev tkill [thr] [sig] : send signal to thread", debug_parse_cli_tkill, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "warn", NULL }, "debug dev warn : call WARN_ON() and possibly crash", debug_parse_cli_warn, NULL, NULL, NULL, ACCESS_EXPERT }, |
| {{ "debug", "dev", "write", NULL }, "debug dev write [size] : write that many bytes in return", debug_parse_cli_write, NULL, NULL, NULL, ACCESS_EXPERT }, |
| |
| #if defined(HA_HAVE_DUMP_LIBS) |
| {{ "show", "libs", NULL, NULL }, "show libs : show loaded object files and libraries", debug_parse_cli_show_libs, NULL, NULL }, |
| #endif |
| {{ "show", "threads", NULL, NULL }, "show threads : show some threads debugging information", NULL, cli_io_handler_show_threads, NULL }, |
| {{},} |
| }}; |
| |
| INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws); |