X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fcalibrate.c;h=95a03d2129dfdde54fbd56cd5e4c982e20d4d7d9;hp=023ea100e1fb6a8fcbdd4e712363421a050e72ae;hb=38b4ef1b199ddb15db78774a39e9c524ca7e2d24;hpb=d78d661021eb1c5761c631dbd525697769fe638b diff --git a/src/bin/lttng/commands/calibrate.c b/src/bin/lttng/commands/calibrate.c index 023ea100e..95a03d212 100644 --- a/src/bin/lttng/commands/calibrate.c +++ b/src/bin/lttng/commands/calibrate.c @@ -2,22 +2,21 @@ * Copyright (C) 2011 - David Goulet * Copyright (C) 2011 - Mathieu Desnoyers * - * 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; only version 2 - * of the License. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2 only, + * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE +#define _LGPL_SOURCE #include #include #include @@ -27,17 +26,15 @@ #include #include #include +#include + +#include #include "../command.h" static int opt_event_type; -static char *opt_kernel; +static int opt_kernel; static int opt_userspace; -#if 0 -/* Not implemented yet */ -static char *opt_cmd_name; -static pid_t opt_pid; -#endif enum { OPT_HELP = 1, @@ -48,73 +45,27 @@ enum { OPT_FUNCTION_ENTRY, OPT_SYSCALL, OPT_USERSPACE, + OPT_KERNEL, + OPT_LIST_OPTIONS, }; static struct lttng_handle *handle; +static struct mi_writer *writer; static struct poptOption long_options[] = { /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, - {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, -#if 0 - /* Not implemented yet */ - {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, - {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, -#else + {"kernel", 'k', POPT_ARG_NONE, 0, OPT_KERNEL, 0, 0}, {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, -#endif - {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, - {"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0}, - {"probe", 0, POPT_ARG_NONE, 0, OPT_PROBE, 0, 0}, {"function", 0, POPT_ARG_NONE, 0, OPT_FUNCTION, 0, 0}, -#if 0 - /* - * Removed from options to discourage its use. Not in kernel - * tracer anymore. - */ - {"function:entry", 0, POPT_ARG_NONE, 0, OPT_FUNCTION_ENTRY, 0, 0}, -#endif - {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0}, + {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, {0, 0, 0, 0, 0, 0, 0} }; /* - * usage - */ -static void usage(FILE *ofp) -{ - fprintf(ofp, "usage: lttng calibrate [options] [calibrate_options]\n"); - fprintf(ofp, "\n"); - fprintf(ofp, " -h, --help Show this help\n"); - fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); -#if 0 - fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); - fprintf(ofp, " If no CMD, the domain used is UST global\n"); - fprintf(ofp, " or else the domain is UST EXEC_NAME\n"); - fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n"); -#else - fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n"); -#endif - fprintf(ofp, "\n"); - fprintf(ofp, "Calibrate options:\n"); - fprintf(ofp, " --tracepoint Tracepoint event (default)\n"); - fprintf(ofp, " --probe\n"); - fprintf(ofp, " Dynamic probe.\n"); - fprintf(ofp, " --function\n"); - fprintf(ofp, " Dynamic function entry/return probe.\n"); -#if 0 - fprintf(ofp, " --function:entry symbol\n"); - fprintf(ofp, " Function tracer event\n"); -#endif - fprintf(ofp, " --syscall System call eventl\n"); - fprintf(ofp, " --marker User-space marker (deprecated)\n"); - fprintf(ofp, "\n"); -} - -/* - * calibrate_lttng + * Calibrate LTTng. * - * Calibrate LTTng. + * Returns a CMD_* error. */ static int calibrate_lttng(void) { @@ -122,106 +73,193 @@ static int calibrate_lttng(void) struct lttng_domain dom; struct lttng_calibrate calibrate; + memset(&dom, 0, sizeof(dom)); + memset(&calibrate, 0, sizeof(calibrate)); + /* Create lttng domain */ if (opt_kernel) { dom.type = LTTNG_DOMAIN_KERNEL; + } else if (opt_userspace) { + dom.type = LTTNG_DOMAIN_UST; + } else { + /* Checked by the caller. */ + assert(0); } handle = lttng_create_handle(NULL, &dom); if (handle == NULL) { - ret = -1; - goto end; + ret = CMD_ERROR; + goto error; } - /* Kernel tracer action */ - if (opt_kernel) { - switch (opt_event_type) { - case LTTNG_EVENT_TRACEPOINT: - DBG("Calibrating kernel tracepoints"); - break; - case LTTNG_EVENT_PROBE: - DBG("Calibrating kernel probes"); - break; - case LTTNG_EVENT_FUNCTION: - DBG("Calibrating kernel functions"); - calibrate.type = LTTNG_CALIBRATE_FUNCTION; - ret = lttng_calibrate(handle, &calibrate); - break; - case LTTNG_EVENT_FUNCTION_ENTRY: - DBG("Calibrating kernel function entry"); - break; - case LTTNG_EVENT_SYSCALL: - DBG("Calibrating kernel syscall"); - break; - default: - ret = CMD_NOT_IMPLEMENTED; - goto end; + switch (opt_event_type) { + case LTTNG_EVENT_TRACEPOINT: + DBG("Calibrating kernel tracepoints"); + break; + case LTTNG_EVENT_PROBE: + DBG("Calibrating kernel probes"); + break; + case LTTNG_EVENT_FUNCTION: + DBG("Calibrating kernel functions"); + calibrate.type = LTTNG_CALIBRATE_FUNCTION; + ret = lttng_calibrate(handle, &calibrate); + if (ret < 0) { + ERR("%s", lttng_strerror(ret)); + goto error; } - } else if (opt_userspace) { /* User-space tracer action */ - ret = CMD_NOT_IMPLEMENTED; - goto end; - } else { - ERR("Please specify a tracer (--kernel or --userspace)"); - goto end; + MSG("%s calibration done", opt_kernel ? "Kernel" : "UST"); + break; + case LTTNG_EVENT_FUNCTION_ENTRY: + DBG("Calibrating kernel function entry"); + break; + case LTTNG_EVENT_SYSCALL: + DBG("Calibrating kernel syscall"); + break; + default: + ret = CMD_UNDEFINED; + goto error; } -end: + + if (lttng_opt_mi) { + assert(writer); + ret = mi_lttng_calibrate(writer, &calibrate); + if (ret) { + ret = CMD_ERROR; + goto error; + } + } + +error: lttng_destroy_handle(handle); return ret; } /* - * cmd_calibrate + * Calibrate LTTng tracer. * - * Calibrate LTTng tracer. + * Returns a CMD_* error. */ int cmd_calibrate(int argc, const char **argv) { - int opt, ret; + int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; static poptContext pc; pc = poptGetContext(NULL, argc, argv, long_options, 0); poptReadDefaultConfig(pc, 0); /* Default event type */ - opt_event_type = LTTNG_EVENT_TRACEPOINT; + opt_event_type = LTTNG_EVENT_FUNCTION; while ((opt = poptGetNextOpt(pc)) != -1) { switch (opt) { case OPT_HELP: - usage(stderr); - ret = CMD_SUCCESS; + SHOW_HELP(); goto end; case OPT_TRACEPOINT: - ret = CMD_NOT_IMPLEMENTED; - break; + ret = CMD_UNDEFINED; + goto end; case OPT_MARKER: - ret = CMD_NOT_IMPLEMENTED; + ret = CMD_UNDEFINED; goto end; case OPT_PROBE: - ret = CMD_NOT_IMPLEMENTED; + ret = CMD_UNDEFINED; break; case OPT_FUNCTION: opt_event_type = LTTNG_EVENT_FUNCTION; break; case OPT_FUNCTION_ENTRY: - ret = CMD_NOT_IMPLEMENTED; - break; + ret = CMD_UNDEFINED; + goto end; case OPT_SYSCALL: - ret = CMD_NOT_IMPLEMENTED; - break; + ret = CMD_UNDEFINED; + goto end; case OPT_USERSPACE: opt_userspace = 1; break; + case OPT_KERNEL: + opt_kernel = 1; + break; + case OPT_LIST_OPTIONS: + list_cmd_options(stdout, long_options); + goto end; default: - usage(stderr); ret = CMD_UNDEFINED; goto end; } } - ret = calibrate_lttng(); + ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace); + if (ret) { + ret = CMD_ERROR; + goto end; + } + + /* Mi check */ + if (lttng_opt_mi) { + writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); + if (!writer) { + ret = -LTTNG_ERR_NOMEM; + goto end; + } + + /* Open command element */ + ret = mi_lttng_writer_command_open(writer, + mi_lttng_element_command_calibrate); + if (ret) { + ret = CMD_ERROR; + goto end; + } + + /* Open output element */ + ret = mi_lttng_writer_open_element(writer, + mi_lttng_element_command_output); + if (ret) { + ret = CMD_ERROR; + goto end; + } + } + + command_ret = calibrate_lttng(); + if (command_ret) { + success = 0; + } + + /* Mi closing */ + if (lttng_opt_mi) { + /* Close output element */ + ret = mi_lttng_writer_close_element(writer); + if (ret) { + ret = CMD_ERROR; + goto end; + } + + /* Success ? */ + ret = mi_lttng_writer_write_element_bool(writer, + mi_lttng_element_command_success, success); + if (ret) { + ret = CMD_ERROR; + goto end; + } + + /* Command element close */ + ret = mi_lttng_writer_command_close(writer); + if (ret) { + ret = CMD_ERROR; + goto end; + } + } end: + /* Mi clean-up */ + if (writer && mi_lttng_writer_destroy(writer)) { + /* Preserve original error code */ + ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; + } + + /* Overwrite ret if an error occurred during calibrate_lttng() */ + ret = command_ret ? command_ret : ret; + + poptFreeContext(pc); return ret; }