diff options
Diffstat (limited to 'src/debug.c')
| -rw-r--r-- | src/debug.c | 2301 |
1 files changed, 2301 insertions, 0 deletions
diff --git a/src/debug.c b/src/debug.c new file mode 100644 index 0000000..fbaad80 --- /dev/null +++ b/src/debug.c @@ -0,0 +1,2301 @@ +/* + * 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/resource.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/utsname.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 + +/* Description of a component with name, version, path, build options etc. E.g. + * one of them is haproxy. Others might be some clearly identified shared libs. + * They're intentionally self-contained and to be placed into an array to make + * it easier to find them in a core. The important fields (name and version) + * are locally allocated, other ones are dynamic. + */ +struct post_mortem_component { + char name[32]; // symbolic short name + char version[32]; // exact version + char *toolchain; // compiler and version (e.g. gcc-11.4.0) + char *toolchain_opts; // optims, arch-specific options (e.g. CFLAGS) + char *build_settings; // build options (e.g. USE_*, TARGET, etc) + char *path; // path if known. +}; + +/* This is a collection of information that are centralized to help with core + * dump analysis. It must be used with a public variable and gather elements + * as much as possible without dereferences so that even when identified in a + * core dump it's possible to get the most out of it even if the core file is + * not much exploitable. It's aligned to 256 so that it's easy to spot, given + * that being that large it will not change its size much. + */ +struct post_mortem { + /* platform-specific information */ + struct { + struct utsname utsname; // OS name+ver+arch+hostname + char hw_vendor[64]; // hardware/hypervisor vendor when known + char hw_family[64]; // hardware/hypervisor product family when known + char hw_model[64]; // hardware/hypervisor product/model when known + char brd_vendor[64]; // mainboard vendor when known + char brd_model[64]; // mainboard model when known + char soc_vendor[64]; // SoC/CPU vendor from cpuinfo + char soc_model[64]; // SoC model when known and relevant + char cpu_model[64]; // CPU model when different from SoC + char virt_techno[16]; // when provided by cpuid + char cont_techno[16]; // empty, "no", "yes", "docker" or others + } platform; + + /* process-specific information */ + struct { + pid_t pid; + uid_t boot_uid; + gid_t boot_gid; + struct rlimit limit_fd; // RLIMIT_NOFILE + struct rlimit limit_ram; // RLIMIT_AS or RLIMIT_DATA + +#if defined(USE_THREAD) + struct { + ullong pth_id; // pthread_t cast to a ullong + void *stack_top; // top of the stack + } thread_info[MAX_THREADS]; +#endif + } process; + +#if defined(HA_HAVE_DUMP_LIBS) + /* information about dynamic shared libraries involved */ + char *libs; // dump of one addr / path per line, or NULL +#endif + + /* info about identified distinct components (executable, shared libs, etc). + * These can be all listed at once in gdb using: + * p *post_mortem.components@post_mortem.nb_components + */ + uint nb_components; // # of components below + struct post_mortem_component *components; // NULL or array +} post_mortem ALIGNED(256) = { }; + +/* Points to a copy of the buffer where the dump functions should write, when + * non-null. It's only used by debuggers for core dump analysis. + */ +struct buffer *thread_dump_buffer = NULL; +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_one(), + * ha_panic and ha_backtrace_to_stderr + */ + if (addr == ha_panic || + addr == ha_backtrace_to_stderr || addr == ha_thread_dump_one) + dump++; + *buf = bak; + continue; + } + + if ((dump & 3) == 1) { + /* starting */ + if (addr == ha_panic || + addr == ha_backtrace_to_stderr || addr == ha_thread_dump_one) { + *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 thread's buffer some known information for the desired thread, + * and optionally extra info when it's safe to do so (current thread or + * isolated). The dump will be appended to the buffer, so the caller is + * responsible for preliminary initializing it. The <from_signal> argument will + * indicate if the function is called from the debug signal handler, indicating + * the thread was dumped upon request from another one, otherwise if the thread + * it the current one, a star ('*') will be displayed in front of the thread to + * indicate the requesting one. Any stuck thread is also prefixed with a '>'. + * The caller is responsible for atomically setting up the thread's dump buffer + * to point to a valid buffer with enough room. Output will be truncated if it + * does not fit. When the dump is complete, the dump buffer will be switched to + * (void*)0x1 that the caller must turn to 0x0 once the contents are collected. + */ +void ha_thread_dump_one(int thr, int from_signal) +{ + struct buffer *buf = HA_ATOMIC_LOAD(&ha_thread_ctx[thr].thread_dump_buffer); + unsigned long __maybe_unused thr_bit = ha_thread_info[thr].ltid_bit; + int __maybe_unused tgrp = ha_thread_info[thr].tgid; + 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); + + 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 == tid && !from_signal) ? '*' : ' ', 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, + !!(ha_thread_ctx[thr].flags & TH_FL_TASK_PROFILING)); + +#if defined(USE_THREAD) + chunk_appendf(buf, + " harmless=%d isolated=%d", + !!(_HA_ATOMIC_LOAD(&ha_tgroup_ctx[tgrp-1].threads_harmless) & thr_bit), + isolated_thread == thr); +#endif + + 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 && !thread_isolated()) + goto leave; + + chunk_appendf(buf, " curr_task="); + ha_task_dump(buf, th_ctx->current, " "); + + if (stuck && thr == tid) { +#ifdef USE_LUA + if (th_ctx->current && + th_ctx->current->process == process_stream && th_ctx->current->context) { + const struct stream *s = (const struct stream *)th_ctx->current->context; + struct hlua *hlua = s ? s->hlua : NULL; + + if (hlua && hlua->T) { + mark_tainted(TAINTED_LUA_STUCK); + if (hlua->state_id == 0) + mark_tainted(TAINTED_LUA_STUCK_SHARED); + } + } +#endif + + if (HA_ATOMIC_LOAD(&pool_trim_in_progress)) + mark_tainted(TAINTED_MEM_TRIMMING_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); + } + leave: + /* end of dump, setting the buffer to 0x1 will tell the caller we're done */ + HA_ATOMIC_STORE(&ha_thread_ctx[thr].thread_dump_buffer, (void*)0x1UL); +} + +/* Triggers a thread dump from thread <thr>, either directly if it's the + * current thread or if thread dump signals are not implemented, or by sending + * a signal if it's a remote one and the feature is supported. The buffer <buf> + * will get the dump appended, and the caller is responsible for making sure + * there is enough room otherwise some contents will be truncated. + */ +void ha_thread_dump(struct buffer *buf, int thr) +{ + struct buffer *old = NULL; + + /* try to impose our dump buffer and to reserve the target thread's + * next dump for us. + */ + do { + if (old) + ha_thread_relax(); + old = NULL; + } while (!HA_ATOMIC_CAS(&ha_thread_ctx[thr].thread_dump_buffer, &old, buf)); + +#ifdef USE_THREAD_DUMP + /* asking the remote thread to dump itself allows to get more details + * including a backtrace. + */ + if (thr != tid) + ha_tkill(thr, DEBUGSIG); + else +#endif + ha_thread_dump_one(thr, thr != tid); + + /* now wait for the dump to be done, and release it */ + do { + if (old) + ha_thread_relax(); + old = (void*)0x01; + } while (!HA_ATOMIC_CAS(&ha_thread_ctx[thr].thread_dump_buffer, &old, 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) { + chunk_appendf(buf, "%sstream=", pfx); + strm_dump_to_buffer(buf, s, pfx, HA_ATOMIC_LOAD(&global.anon_key)); + } + +#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); + } + + /* we may need to terminate the current line */ + if (*b_peek(buf, b_data(buf)-1) != '\n') + 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; + + /* FIXME: Don't watch the other side !*/ + if (unlikely(sc_opposite(sc)->flags & SC_FL_SHUT_DONE)) + return 1; + + if (appctx->st0) + thr = appctx->st1; + else + thr = 0; + + do { + chunk_reset(&trash); + ha_thread_dump(&trash, thr); + + if (applet_putchk(appctx, &trash) == -1) { + /* failed, try again */ + appctx->st1 = thr; + return 0; + } + thr++; + } while (thr < global.nbthread); + + 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 + +/* parse a "show dev" command. It returns 1 if it emits anything otherwise zero. */ +static int debug_parse_cli_show_dev(char **args, char *payload, struct appctx *appctx, void *private) +{ + const char **build_opt; + + if (*args[2]) + return cli_err(appctx, "This command takes no argument.\n"); + + chunk_reset(&trash); + + chunk_appendf(&trash, "Features\n %s\n", build_features); + + chunk_appendf(&trash, "Build options\n"); + for (build_opt = NULL; (build_opt = hap_get_next_build_opt(build_opt)); ) + if (append_prefixed_str(&trash, *build_opt, " ", '\n', 0) == 0) + chunk_strcat(&trash, "\n"); + + chunk_appendf(&trash, "Platform info\n"); + if (*post_mortem.platform.hw_vendor) + chunk_appendf(&trash, " machine vendor: %s\n", post_mortem.platform.hw_vendor); + if (*post_mortem.platform.hw_family) + chunk_appendf(&trash, " machine family: %s\n", post_mortem.platform.hw_family); + if (*post_mortem.platform.hw_model) + chunk_appendf(&trash, " machine model: %s\n", post_mortem.platform.hw_model); + if (*post_mortem.platform.brd_vendor) + chunk_appendf(&trash, " board vendor: %s\n", post_mortem.platform.brd_vendor); + if (*post_mortem.platform.brd_model) + chunk_appendf(&trash, " board model: %s\n", post_mortem.platform.brd_model); + if (*post_mortem.platform.soc_vendor) + chunk_appendf(&trash, " soc vendor: %s\n", post_mortem.platform.soc_vendor); + if (*post_mortem.platform.soc_model) + chunk_appendf(&trash, " soc model: %s\n", post_mortem.platform.soc_model); + if (*post_mortem.platform.cpu_model) + chunk_appendf(&trash, " cpu model: %s\n", post_mortem.platform.cpu_model); + if (*post_mortem.platform.virt_techno) + chunk_appendf(&trash, " virtual machine: %s\n", post_mortem.platform.virt_techno); + if (*post_mortem.platform.cont_techno) + chunk_appendf(&trash, " container: %s\n", post_mortem.platform.cont_techno); + if (*post_mortem.platform.utsname.sysname) + chunk_appendf(&trash, " OS name: %s\n", post_mortem.platform.utsname.sysname); + if (*post_mortem.platform.utsname.release) + chunk_appendf(&trash, " OS release: %s\n", post_mortem.platform.utsname.release); + if (*post_mortem.platform.utsname.version) + chunk_appendf(&trash, " OS version: %s\n", post_mortem.platform.utsname.version); + if (*post_mortem.platform.utsname.machine) + chunk_appendf(&trash, " OS architecture: %s\n", post_mortem.platform.utsname.machine); + if (*post_mortem.platform.utsname.nodename) + chunk_appendf(&trash, " node name: %s\n", HA_ANON_CLI(post_mortem.platform.utsname.nodename)); + + chunk_appendf(&trash, "Process info\n"); + chunk_appendf(&trash, " pid: %d\n", post_mortem.process.pid); + chunk_appendf(&trash, " boot uid: %d\n", post_mortem.process.boot_uid); + chunk_appendf(&trash, " boot gid: %d\n", post_mortem.process.boot_gid); + + if ((ulong)post_mortem.process.limit_fd.rlim_cur != RLIM_INFINITY) + chunk_appendf(&trash, " fd limit (soft): %lu\n", (ulong)post_mortem.process.limit_fd.rlim_cur); + if ((ulong)post_mortem.process.limit_fd.rlim_max != RLIM_INFINITY) + chunk_appendf(&trash, " fd limit (hard): %lu\n", (ulong)post_mortem.process.limit_fd.rlim_max); + if ((ulong)post_mortem.process.limit_ram.rlim_cur != RLIM_INFINITY) + chunk_appendf(&trash, " ram limit (soft): %lu\n", (ulong)post_mortem.process.limit_ram.rlim_cur); + if ((ulong)post_mortem.process.limit_ram.rlim_max != RLIM_INFINITY) + chunk_appendf(&trash, " ram limit (hard): %lu\n", (ulong)post_mortem.process.limit_ram.rlim_max); + + return cli_msg(appctx, LOG_INFO, trash.area); +} + +/* Dumps a state of all threads into the trash and on fd #2, then aborts. + * A copy will be put into a trash chunk that's assigned to thread_dump_buffer + * so that the debugger can easily find it. This buffer might be truncated if + * too many threads are being dumped, but at least we'll dump them all on stderr. + * If thread_dump_buffer is set, it means that a panic has already begun. + */ +void ha_panic() +{ + struct buffer *old; + unsigned int thr; + + mark_tainted(TAINTED_PANIC); + + old = NULL; + if (!HA_ATOMIC_CAS(&thread_dump_buffer, &old, get_trash_chunk())) { + /* 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); + + for (thr = 0; thr < global.nbthread; thr++) { + ha_thread_dump(&trash, thr); + DISGUISE(write(2, trash.area, trash.data)); + b_force_xfer(thread_dump_buffer, &trash, b_room(thread_dump_buffer)); + chunk_reset(&trash); + } + +#ifdef USE_LUA + if (get_tainted() & TAINTED_LUA_STUCK_SHARED && global.nbthread > 1) { + chunk_printf(&trash, + "### Note: at least one thread was stuck in a Lua context loaded using the\n" + " 'lua-load' directive, which is known for causing heavy contention\n" + " when used with threads. Please consider using 'lua-load-per-thread'\n" + " instead if your code is safe to run in parallel on multiple threads.\n"); + DISGUISE(write(2, trash.area, trash.data)); + } + else if (get_tainted() & TAINTED_LUA_STUCK) { + chunk_printf(&trash, + "### Note: at least one thread was stuck in a Lua context in a way that suggests\n" + " heavy processing inside a dependency or a long loop that can't yield.\n" + " Please make sure any external code you may rely on is safe for use in\n" + " an event-driven engine.\n"); + DISGUISE(write(2, trash.area, trash.data)); + } +#endif + if (get_tainted() & TAINTED_MEM_TRIMMING_STUCK) { + chunk_printf(&trash, + "### Note: one thread was found stuck under malloc_trim(), which can run for a\n" + " very long time on large memory systems. You way want to disable this\n" + " memory reclaiming feature by setting 'no-memory-trimming' in the\n" + " 'global' section of your configuration to avoid this in the future.\n"); + 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]); + int isolate; + + if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) + return 1; + + isolate = strcmp(args[4], "isolated") == 0; + + _HA_ATOMIC_INC(&debug_commands_issued); + gettimeofday(&curr, NULL); + tv_ms_add(&deadline, &curr, loop); + + if (isolate) + thread_isolate(); + + while (tv_ms_cmp(&curr, &deadline) < 0) + gettimeofday(&curr, NULL); + + if (isolate) + thread_release(); + + 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"); +} + +/* handles SIGRTMAX to inject random delays on the receiving thread in order + * to try to increase the likelihood to reproduce inter-thread races. The + * signal is periodically sent by a task initiated by "debug dev delay-inj". + */ +void debug_delay_inj_sighandler(int sig, siginfo_t *si, void *arg) +{ + volatile int i = statistical_prng_range(10000); + + while (i--) + __ha_cpu_relax(); +} +#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 [ strm=<ptr> ] { <obj> <op> <value> | wake }*\n" + " <obj> = { strm.f | strm.x | scf.s | scb.s | txn.f | req.f | res.f }\n" + " <op> = {'' (show) | '=' (assign) | '^' (xor) | '+' (or) | '-' (andnot)}\n" + " <value> = 'now' | 64-bit dec/hex integer (0x prefix supported)\n" + " 'wake' wakes the stream assigned 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("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; +} + +/* parse a "debug dev stream" command */ +/* + * debug dev task <ptr> [ "wake" | "expire" | "kill" ] + * Show/change status of a task/tasklet + */ +static int debug_parse_cli_task(char **args, char *payload, struct appctx *appctx, void *private) +{ + const struct ha_caller *caller; + struct task *t; + char *endarg; + char *msg; + void *ptr; + int ret = 1; + int task_ok; + int arg; + + if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) + return 1; + + /* parse the pointer value */ + ptr = (void *)strtoul(args[3], &endarg, 0); + if (!*args[3] || *endarg) + goto usage; + + _HA_ATOMIC_INC(&debug_commands_issued); + + /* everything below must run under thread isolation till reaching label "leave" */ + thread_isolate(); + + /* struct tasklet is smaller than struct task and is sufficient to check + * the TASK_COMMON part. + */ + if (!may_access(ptr) || !may_access(ptr + sizeof(struct tasklet) - 1) || + ((const struct tasklet *)ptr)->tid < -1 || + ((const struct tasklet *)ptr)->tid >= (int)MAX_THREADS) { + ret = cli_err(appctx, "The designated memory area doesn't look like a valid task/tasklet\n"); + goto leave; + } + + t = ptr; + caller = t->caller; + msg = NULL; + task_ok = may_access(ptr + sizeof(*t) - 1); + + chunk_reset(&trash); + resolve_sym_name(&trash, NULL, (const void *)t->process); + + /* we need to be careful here because we may dump a freed task that's + * still in the pool cache, containing garbage in pointers. + */ + if (!*args[4]) { + memprintf(&msg, "%s%p: %s state=%#x tid=%d process=%s ctx=%p calls=%d last=%s:%d intl=%d", + msg ? msg : "", t, (t->state & TASK_F_TASKLET) ? "tasklet" : "task", + t->state, t->tid, trash.area, t->context, t->calls, + caller && may_access(caller) && may_access(caller->func) && isalnum((uchar)*caller->func) ? caller->func : "0", + caller ? t->caller->line : 0, + (t->state & TASK_F_TASKLET) ? LIST_INLIST(&((const struct tasklet *)t)->list) : 0); + + if (task_ok && !(t->state & TASK_F_TASKLET)) + memprintf(&msg, "%s inrq=%d inwq=%d exp=%d nice=%d", + msg ? msg : "", task_in_rq(t), task_in_wq(t), t->expire, t->nice); + + memprintf(&msg, "%s\n", msg ? msg : ""); + } + + for (arg = 4; *args[arg]; arg++) { + if (strcmp(args[arg], "expire") == 0) { + if (t->state & TASK_F_TASKLET) { + /* do nothing for tasklets */ + } + else if (task_ok) { + /* unlink task and wake with timer flag */ + __task_unlink_wq(t); + t->expire = now_ms; + task_wakeup(t, TASK_WOKEN_TIMER); + } + } else if (strcmp(args[arg], "wake") == 0) { + /* wake with all flags but init / timer */ + if (t->state & TASK_F_TASKLET) + tasklet_wakeup((struct tasklet *)t); + else if (task_ok) + task_wakeup(t, TASK_WOKEN_ANY & ~(TASK_WOKEN_INIT|TASK_WOKEN_TIMER)); + } else if (strcmp(args[arg], "kill") == 0) { + /* Kill the task. This is not idempotent! */ + if (!(t->state & TASK_KILLED)) { + if (t->state & TASK_F_TASKLET) + tasklet_kill((struct tasklet *)t); + else if (task_ok) + task_kill(t); + } + } else { + thread_release(); + goto usage; + } + } + + if (msg && *msg) + ret = cli_dynmsg(appctx, LOG_INFO, msg); + leave: + thread_release(); + return ret; + usage: + return cli_err(appctx, + "Usage: debug dev task <ptr> [ wake | expire | kill ]\n" + " By default, dumps some info on task/tasklet <ptr>. 'wake' will wake it up\n" + " with all conditions flags but init/exp. 'expire' will expire the entry, and\n" + " 'kill' will kill it (warning: may crash since later not idempotent!). All\n" + " changes may crash the process if performed on a wrong object!\n" + ); +} + +#if defined(DEBUG_DEV) +static struct task *debug_delay_inj_task(struct task *t, void *ctx, unsigned int state) +{ + unsigned long *tctx = ctx; // [0] = interval, [1] = nbwakeups + unsigned long inter = tctx[0]; + unsigned long count = tctx[1]; + unsigned long rnd; + + if (inter) + t->expire = tick_add(now_ms, inter); + else + task_wakeup(t, TASK_WOKEN_MSG); + + /* wake a random thread */ + while (count--) { + rnd = statistical_prng_range(global.nbthread); + ha_tkill(rnd, SIGRTMAX); + } + return t; +} + +/* parse a "debug dev delay-inj" command + * debug dev delay-inj <inter> <count> + */ +static int debug_parse_delay_inj(char **args, char *payload, struct appctx *appctx, void *private) +{ + unsigned long *tctx; // [0] = inter, [2] = count + struct task *task; + + if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) + return 1; + + if (!*args[4]) + return cli_err(appctx, "Usage: debug dev delay-inj <inter_ms> <count>*\n"); + + _HA_ATOMIC_INC(&debug_commands_issued); + + tctx = calloc(2, sizeof(*tctx)); + if (!tctx) + goto fail; + + tctx[0] = atoi(args[3]); + tctx[1] = atoi(args[4]); + + task = task_new_here/*anywhere*/(); + if (!task) + goto fail; + + task->process = debug_delay_inj_task; + task->context = tctx; + task_wakeup(task, TASK_WOKEN_INIT); + return 1; + + fail: + free(tctx); + return cli_err(appctx, "Not enough memory"); +} +#endif // DEBUG_DEV + +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(count + 2, sizeof(*tctx)); + 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; + + /* FIXME: Don't watch the other side !*/ + if (unlikely(sc_opposite(sc)->flags & SC_FL_SHUT_DONE)) + 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 + /* trick: epoll_ctl() will return -ENOENT when trying + * to remove from a valid epoll FD an FD that was not + * registered against it. But we don't want to risk + * disabling a random FD. Instead we'll create a new + * one by duplicating 0 (it should be valid since + * pointing to a terminal or /dev/null), and try to + * remove it. + */ + ({ + int fd2 = dup(0); + int ret = fd2; + if (ret >= 0) { + ret = epoll_ctl(fd, EPOLL_CTL_DEL, fd2, NULL); + if (ret == -1 && errno == ENOENT) + ret = 0; // that's a real epoll + else + ret = -1; // it's something else + close(fd2); + } + ret; + }) == 0 ? "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 */ + char *match; /* non-null if a name prefix is specified */ + int show_all; /* show all entries if non-null */ + int width; /* 1st column width */ + long tot_size; /* sum of alloc-free */ + ulong tot_calls; /* sum of calls */ +}; + +/* 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 if (strcmp(args[arg], "match") == 0 && *args[arg + 1]) { + ha_free(&ctx->match); + ctx->match = strdup(args[arg + 1]); + arg++; + continue; + } + else + return cli_err(appctx, "Expects either 'reset', 'all', or 'match <pfx>'.\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; + const char *pfx = ctx->match; + int ret = 1; + + /* FIXME: Don't watch the other side !*/ + if (unlikely(sc_opposite(sc)->flags & SC_FL_SHUT_DONE)) + 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; + int direction = 0; // neither alloc nor free (e.g. realloc) + + 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"; direction = 1; break; + case MEM_STATS_TYPE_FREE: type = "FREE"; direction = -1; break; + case MEM_STATS_TYPE_MALLOC: type = "MALLOC"; direction = 1; break; + case MEM_STATS_TYPE_REALLOC: type = "REALLOC"; break; + case MEM_STATS_TYPE_STRDUP: type = "STRDUP"; direction = 1; break; + case MEM_STATS_TYPE_P_ALLOC: type = "P_ALLOC"; direction = 1; if (ptr->extra) info = ((const struct pool_head *)ptr->extra)->name; break; + case MEM_STATS_TYPE_P_FREE: type = "P_FREE"; direction = -1; 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)); + + /* only match requested prefixes */ + if (pfx && (!info || strncmp(info, pfx, strlen(pfx)) != 0)) + continue; + + 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; + goto end; + } + if (direction > 0) { + ctx->tot_size += (ulong)ptr->size; + ctx->tot_calls += (ulong)ptr->calls; + } + else if (direction < 0) { + ctx->tot_size -= (ulong)ptr->size; + ctx->tot_calls += (ulong)ptr->calls; + } + } + + /* now dump a summary */ + chunk_reset(&trash); + chunk_appendf(&trash, "Total"); + while (trash.data < ctx->width) + trash.area[trash.data++] = ' '; + + chunk_appendf(&trash, "%7s size: %12ld calls: %9lu size/call: %6ld %s\n", + "BALANCE", + ctx->tot_size, ctx->tot_calls, + (long)(ctx->tot_calls ? (ctx->tot_size / ctx->tot_calls) : 0), + "(excl. realloc)"); + + if (applet_putchk(appctx, &trash) == -1) { + ctx->start = ptr; + ret = 0; + goto end; + } + end: + return ret; +} + +/* release the "show pools" context */ +static void debug_release_memstats(struct appctx *appctx) +{ + struct dev_mem_ctx *ctx = appctx->svcctx; + + ha_free(&ctx->match); +} +#endif + +#ifdef USE_THREAD_DUMP + +/* 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) +{ + struct buffer *buf = HA_ATOMIC_LOAD(&th_ctx->thread_dump_buffer); + int harmless = is_thread_harmless(); + + /* first, let's check it's really for us and that we didn't just get + * a spurious DEBUGSIG. + */ + if (!buf || buf == (void*)(0x1UL)) + return; + + /* now dump the current state into the designated buffer, and indicate + * we come from a sig handler. + */ + ha_thread_dump_one(tid, 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); +#if defined(DEBUG_DEV) + sigaddset(&set, SIGRTMAX); +#endif + 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); + +#if defined(DEBUG_DEV) + sa.sa_handler = NULL; + sa.sa_sigaction = debug_delay_inj_sighandler; + sigemptyset(&sa.sa_mask); + sa.sa_flags = SA_SIGINFO; + sigaction(SIGRTMAX, &sa, NULL); +#endif + return ERR_NONE; +} + +REGISTER_POST_CHECK(init_debug); +REGISTER_PER_THREAD_INIT(init_debug_per_thread); + +#endif /* USE_THREAD_DUMP */ + + +static void feed_post_mortem_linux() +{ +#if defined(__linux__) + struct stat statbuf; + FILE *file; + + /* DMI reports either HW or hypervisor, this allows to detect most VMs. + * On ARM the device-tree is often more precise for the model. Since many + * boards present "to be filled by OEM" or so in many fields, we dedup + * them as much as possible. + */ + if (read_line_to_trash("/sys/class/dmi/id/sys_vendor") > 0) + strlcpy2(post_mortem.platform.hw_vendor, trash.area, sizeof(post_mortem.platform.hw_vendor)); + + if (read_line_to_trash("/sys/class/dmi/id/product_family") > 0 && + strcmp(trash.area, post_mortem.platform.hw_vendor) != 0) + strlcpy2(post_mortem.platform.hw_family, trash.area, sizeof(post_mortem.platform.hw_family)); + + if ((read_line_to_trash("/sys/class/dmi/id/product_name") > 0 && + strcmp(trash.area, post_mortem.platform.hw_vendor) != 0 && + strcmp(trash.area, post_mortem.platform.hw_family) != 0)) + strlcpy2(post_mortem.platform.hw_model, trash.area, sizeof(post_mortem.platform.hw_model)); + + if ((read_line_to_trash("/sys/class/dmi/id/board_vendor") > 0 && + strcmp(trash.area, post_mortem.platform.hw_vendor) != 0)) + strlcpy2(post_mortem.platform.brd_vendor, trash.area, sizeof(post_mortem.platform.brd_vendor)); + + if ((read_line_to_trash("/sys/firmware/devicetree/base/model") > 0 && + strcmp(trash.area, post_mortem.platform.brd_vendor) != 0 && + strcmp(trash.area, post_mortem.platform.hw_vendor) != 0 && + strcmp(trash.area, post_mortem.platform.hw_family) != 0 && + strcmp(trash.area, post_mortem.platform.hw_model) != 0) || + (read_line_to_trash("/sys/class/dmi/id/board_name") > 0 && + strcmp(trash.area, post_mortem.platform.brd_vendor) != 0 && + strcmp(trash.area, post_mortem.platform.hw_vendor) != 0 && + strcmp(trash.area, post_mortem.platform.hw_family) != 0 && + strcmp(trash.area, post_mortem.platform.hw_model) != 0)) + strlcpy2(post_mortem.platform.brd_model, trash.area, sizeof(post_mortem.platform.brd_model)); + + /* Check for containers. In a container on linux we don't see keventd (2.4) kthreadd (2.6+) on pid 2 */ + if (read_line_to_trash("/proc/2/status") <= 0 || + (strcmp(trash.area, "Name:\tkthreadd") != 0 && + strcmp(trash.area, "Name:\tkeventd") != 0)) { + /* OK we're in a container. Docker often has /.dockerenv */ + const char *tech = "yes"; + + if (stat("/.dockerenv", &statbuf) == 0) + tech = "docker"; + strlcpy2(post_mortem.platform.cont_techno, tech, sizeof(post_mortem.platform.cont_techno)); + } + else { + strlcpy2(post_mortem.platform.cont_techno, "no", sizeof(post_mortem.platform.cont_techno)); + } + + file = fopen("/proc/cpuinfo", "r"); + if (file) { + uint cpu_implem = 0, cpu_arch = 0, cpu_variant = 0, cpu_part = 0, cpu_rev = 0; // arm + uint cpu_family = 0, model = 0, stepping = 0; // x86 + char vendor_id[64] = "", model_name[64] = ""; // x86 + char machine[64] = "", system_type[64] = "", cpu_model[64] = ""; // mips + const char *virt = "no"; + char *p, *e, *v, *lf; + + /* let's figure what CPU we're working with */ + while ((p = fgets(trash.area, trash.size, file)) != NULL) { + lf = strchr(p, '\n'); + if (lf) + *lf = 0; + + /* stop at first line break */ + if (!*p) + break; + + /* skip colon and spaces and trim spaces after name */ + v = e = strchr(p, ':'); + if (!e) + continue; + + do { *e-- = 0; } while (e >= p && (*e == ' ' || *e == '\t')); + + /* locate value after colon */ + do { v++; } while (*v == ' ' || *v == '\t'); + + /* ARM */ + if (strcmp(p, "CPU implementer") == 0) + cpu_implem = strtoul(v, NULL, 0); + else if (strcmp(p, "CPU architecture") == 0) + cpu_arch = strtoul(v, NULL, 0); + else if (strcmp(p, "CPU variant") == 0) + cpu_variant = strtoul(v, NULL, 0); + else if (strcmp(p, "CPU part") == 0) + cpu_part = strtoul(v, NULL, 0); + else if (strcmp(p, "CPU revision") == 0) + cpu_rev = strtoul(v, NULL, 0); + + /* x86 */ + else if (strcmp(p, "cpu family") == 0) + cpu_family = strtoul(v, NULL, 0); + else if (strcmp(p, "model") == 0) + model = strtoul(v, NULL, 0); + else if (strcmp(p, "stepping") == 0) + stepping = strtoul(v, NULL, 0); + else if (strcmp(p, "vendor_id") == 0) + strlcpy2(vendor_id, v, sizeof(vendor_id)); + else if (strcmp(p, "model name") == 0) + strlcpy2(model_name, v, sizeof(model_name)); + else if (strcmp(p, "flags") == 0) { + if (strstr(v, "hypervisor")) { + if (strncmp(post_mortem.platform.hw_vendor, "QEMU", 4) == 0) + virt = "qemu"; + else if (strncmp(post_mortem.platform.hw_vendor, "VMware", 6) == 0) + virt = "vmware"; + else + virt = "yes"; + } + } + + /* MIPS */ + else if (strcmp(p, "system type") == 0) + strlcpy2(system_type, v, sizeof(system_type)); + else if (strcmp(p, "machine") == 0) + strlcpy2(machine, v, sizeof(machine)); + else if (strcmp(p, "cpu model") == 0) + strlcpy2(cpu_model, v, sizeof(cpu_model)); + } + fclose(file); + + /* Machine may replace hw_product on MIPS */ + if (!*post_mortem.platform.hw_model) + strlcpy2(post_mortem.platform.hw_model, machine, sizeof(post_mortem.platform.hw_model)); + + /* SoC vendor */ + strlcpy2(post_mortem.platform.soc_vendor, vendor_id, sizeof(post_mortem.platform.soc_vendor)); + + /* SoC model */ + if (*system_type) { + /* MIPS */ + strlcpy2(post_mortem.platform.soc_model, system_type, sizeof(post_mortem.platform.soc_model)); + *system_type = 0; + } else if (*model_name) { + /* x86 */ + strlcpy2(post_mortem.platform.soc_model, model_name, sizeof(post_mortem.platform.soc_model)); + *model_name = 0; + } + + /* Create a CPU model name based on available IDs */ + if (cpu_implem) // arm + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sImpl %#02x", *cpu_model ? " " : "", cpu_implem); + + if (cpu_family) // x86 + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sFam %u", *cpu_model ? " " : "", cpu_family); + + if (model) // x86 + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sModel %u", *cpu_model ? " " : "", model); + + if (stepping) // x86 + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sStep %u", *cpu_model ? " " : "", stepping); + + if (cpu_arch) // arm + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sArch %u", *cpu_model ? " " : "", cpu_arch); + + if (cpu_part) // arm + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sPart %#03x", *cpu_model ? " " : "", cpu_part); + + if (cpu_variant || cpu_rev) // arm + snprintf(cpu_model + strlen(cpu_model), + sizeof(cpu_model) - strlen(cpu_model), + "%sr%up%u", *cpu_model ? " " : "", cpu_variant, cpu_rev); + + strlcpy2(post_mortem.platform.cpu_model, cpu_model, sizeof(post_mortem.platform.cpu_model)); + + if (*virt) + strlcpy2(post_mortem.platform.virt_techno, virt, sizeof(post_mortem.platform.virt_techno)); + } +#endif // __linux__ +} + +static int feed_post_mortem() +{ + /* kernel type, version and arch */ + uname(&post_mortem.platform.utsname); + + /* some boot-time info related to the process */ + post_mortem.process.pid = getpid(); + post_mortem.process.boot_uid = geteuid(); + post_mortem.process.boot_gid = getegid(); + + getrlimit(RLIMIT_NOFILE, &post_mortem.process.limit_fd); +#if defined(RLIMIT_AS) + getrlimit(RLIMIT_AS, &post_mortem.process.limit_ram); +#elif defined(RLIMIT_DATA) + getrlimit(RLIMIT_DATA, &post_mortem.process.limit_ram); +#endif + + if (strcmp(post_mortem.platform.utsname.sysname, "Linux") == 0) + feed_post_mortem_linux(); + +#if defined(HA_HAVE_DUMP_LIBS) + chunk_reset(&trash); + if (dump_libs(&trash, 1)) + post_mortem.libs = strdup(trash.area); +#endif + + return ERR_NONE; +} + +REGISTER_POST_CHECK(feed_post_mortem); + +static void deinit_post_mortem(void) +{ + int comp; + +#if defined(HA_HAVE_DUMP_LIBS) + ha_free(&post_mortem.libs); +#endif + for (comp = 0; comp < post_mortem.nb_components; comp++) { + free(post_mortem.components[comp].toolchain); + free(post_mortem.components[comp].toolchain_opts); + free(post_mortem.components[comp].build_settings); + free(post_mortem.components[comp].path); + } + ha_free(&post_mortem.components); +} + +REGISTER_POST_DEINIT(deinit_post_mortem); + +/* Appends a component to the list of post_portem info. May silently fail + * on allocation errors but we don't care since the goal is to provide info + * we have in case it helps. + */ +void post_mortem_add_component(const char *name, const char *version, + const char *toolchain, const char *toolchain_opts, + const char *build_settings, const char *path) +{ + struct post_mortem_component *comp; + int nbcomp = post_mortem.nb_components; + + comp = realloc(post_mortem.components, (nbcomp + 1) * sizeof(*comp)); + if (!comp) + return; + + memset(&comp[nbcomp], 0, sizeof(*comp)); + strlcpy2(comp[nbcomp].name, name, sizeof(comp[nbcomp].name)); + strlcpy2(comp[nbcomp].version, version, sizeof(comp[nbcomp].version)); + comp[nbcomp].toolchain = strdup(toolchain); + comp[nbcomp].toolchain_opts = strdup(toolchain_opts); + comp[nbcomp].build_settings = strdup(build_settings); + comp[nbcomp].path = strdup(path); + + post_mortem.nb_components++; + post_mortem.components = comp; +} + +#ifdef USE_THREAD +/* init code is called one at a time so let's collect all per-thread info on + * the last starting thread. These info are not critical anyway and there's no + * problem if we get them slightly late. + */ +static int feed_post_mortem_late() +{ + static int per_thread_info_collected; + + if (HA_ATOMIC_ADD_FETCH(&per_thread_info_collected, 1) == global.nbthread) { + int i; + for (i = 0; i < global.nbthread; i++) { + post_mortem.process.thread_info[i].pth_id = ha_thread_info[i].pth_id; + post_mortem.process.thread_info[i].stack_top = ha_thread_info[i].stack_top; + } + } + return 1; +} + +REGISTER_PER_THREAD_INIT(feed_post_mortem_late); +#endif + +/* 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", "delay-inj", NULL },"debug dev delay-inj <inter> <count> : inject random delays into threads", debug_parse_delay_inj, NULL, NULL, NULL, ACCESS_EXPERT }, + {{ "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> [isolated] : loop this long, possibly isolated", debug_parse_cli_loop, NULL, NULL, NULL, ACCESS_EXPERT }, +#if defined(DEBUG_MEM_STATS) + {{ "debug", "dev", "memstats", NULL }, "debug dev memstats [reset|all|match ...]: dump/reset memory statistics", debug_parse_cli_memstats, debug_iohandler_memstats, debug_release_memstats, 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", "task", NULL }, "debug dev task <ptr> [wake|expire|kill] : show/wake/expire/kill task/tasklet", debug_parse_cli_task, 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 }, + + {{ "show", "dev", NULL, NULL }, "show dev : show debug info for developers", debug_parse_cli_show_dev, NULL, NULL }, +#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); |