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uftrace.c
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/*
* uftrace - Function (Graph) Tracer for Userspace
*
* Copyright (C) 2014-2018 LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
*
* 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; version 2 of the License.
*
* 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
*/
#include <stdio.h>
#include <stdlib.h>
#include <argp.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
/* This should be defined before #include "utils.h" */
#define PR_FMT "uftrace"
#include "uftrace.h"
#include "version.h"
#include "libmcount/mcount.h"
#include "libtraceevent/kbuffer.h"
#include "utils/utils.h"
#include "utils/symbol.h"
#include "utils/rbtree.h"
#include "utils/list.h"
#include "utils/fstack.h"
#include "utils/filter.h"
/* output of --version option (generated by argp runtime) */
const char *argp_program_version = "uftrace " UFTRACE_VERSION;
/* (a part of) output in --help option (generated by argp runtime) */
const char *argp_program_bug_address = "https://github.com/namhyung/uftrace/issues";
static bool dbg_domain_set = false;
static bool parsing_default_opts = false;
enum options {
OPT_flat = 301,
OPT_no_libcall,
OPT_symbols,
OPT_logfile,
OPT_force,
OPT_task,
OPT_no_merge,
OPT_nop,
OPT_time,
OPT_max_stack,
OPT_port,
OPT_nopager,
OPT_avg_total,
OPT_avg_self,
OPT_color,
OPT_disabled,
OPT_demangle,
OPT_dbg_domain,
OPT_report,
OPT_column_view,
OPT_column_offset,
OPT_bind_not,
OPT_task_newline,
OPT_chrome_trace,
OPT_flame_graph,
OPT_graphviz,
OPT_sample_time,
OPT_diff,
OPT_sort_column,
OPT_tid_filter,
OPT_num_thread,
OPT_no_comment,
OPT_libmcount_single,
OPT_rt_prio,
OPT_kernel_bufsize,
OPT_kernel_skip_out,
OPT_kernel_full,
OPT_kernel_only,
OPT_list_event,
OPT_run_cmd,
OPT_opt_file,
OPT_keep_pid,
OPT_diff_policy,
OPT_event_full,
OPT_record,
OPT_libname,
OPT_match_type,
OPT_no_randomize_addr,
OPT_no_event,
OPT_signal,
OPT_srcline,
};
static struct argp_option uftrace_options[] = {
{ "library-path", 'L', "PATH", 0, "Load libraries from this PATH" },
{ "filter", 'F', "FUNC", 0, "Only trace those FUNCs" },
{ "notrace", 'N', "FUNC", 0, "Don't trace those FUNCs" },
{ "trigger", 'T', "FUNC@act[,act,...]", 0, "Trigger action on those FUNCs" },
{ "depth", 'D', "DEPTH", 0, "Trace functions within DEPTH" },
{ "time-filter", 't', "TIME", 0, "Hide small functions run less than the TIME" },
{ "caller-filter", 'C', "FUNC", 0, "Only trace callers of those FUNCs" },
{ "argument", 'A', "FUNC@arg[,arg,...]", 0, "Show function arguments" },
{ "retval", 'R', "FUNC@retval", 0, "Show function return value" },
{ "patch", 'P', "FUNC", 0, "Apply dynamic patching for FUNCs" },
{ "unpatch", 'U', "FUNC", 0, "Don't apply dynamic patching for FUNCs" },
{ "size-filter", 'Z', "SIZE", 0, "Apply dynamic patching for functions bigger than SIZE" },
{ "debug", 'v', 0, 0, "Print debug messages" },
{ "verbose", 'v', 0, 0, "Print verbose (debug) messages" },
{ "data", 'd', "DATA", 0, "Use this DATA instead of uftrace.data" },
{ "flat", OPT_flat, 0, 0, "Use flat output format" },
{ "no-libcall", OPT_no_libcall, 0, 0, "Don't trace library function calls" },
{ "symbols", OPT_symbols, 0, 0, "Print symbol tables" },
{ "buffer", 'b', "SIZE", 0, "Size of tracing buffer "
"(default: " stringify(SHMEM_BUFFER_SIZE_KB) "K)" },
{ "logfile", OPT_logfile, "FILE", 0, "Save log messages to this file" },
{ "force", OPT_force, 0, 0, "Trace even if executable is not instrumented" },
{ "task", OPT_task, 0, 0, "Show task info instead" },
{ "tid", OPT_tid_filter, "TID[,TID,...]", 0, "Only replay those tasks" },
{ "no-merge", OPT_no_merge, 0, 0, "Don't merge leaf functions" },
{ "nop", OPT_nop, 0, 0, "No operation (for performance test)" },
{ "time", OPT_time, 0, 0, "Print time information" },
{ "max-stack", OPT_max_stack, "DEPTH", 0, "Set max stack depth to DEPTH "
"(default: " stringify(OPT_RSTACK_DEFAULT) ")" },
{ "kernel", 'k', 0, 0, "Trace kernel functions also (if supported)" },
{ "host", 'H', "HOST", 0, "Send trace data to HOST instead of write to file" },
{ "port", OPT_port, "PORT", 0, "Use PORT for network connection "
"(default: " stringify(UFTRACE_RECV_PORT) ")" },
{ "no-pager", OPT_nopager, 0, 0, "Do not use pager" },
{ "sort", 's', "KEY[,KEY,...]", 0, "Sort reported functions by KEYs "
"(default: " OPT_SORT_KEYS ")" },
{ "avg-total", OPT_avg_total, 0, 0, "Show average/min/max of total function time" },
{ "avg-self", OPT_avg_self, 0, 0, "Show average/min/max of self function time" },
{ "color", OPT_color, "SET", 0, "Use color for output: yes, no, auto (default: auto)" },
{ "disable", OPT_disabled, 0, 0, "Start with tracing disabled" },
{ "demangle", OPT_demangle, "TYPE", 0, "C++ symbol demangling: full, simple, no (default: simple)" },
{ "debug-domain", OPT_dbg_domain, "DOMAIN", 0, "Filter debugging domain" },
{ "report", OPT_report, 0, 0, "Show live report" },
{ "column-view", OPT_column_view, 0, 0, "Print tasks in separate columns" },
{ "column-offset", OPT_column_offset, "DEPTH", 0, "Offset of each column "
"(default: " stringify(OPT_COLUMN_OFFSET) ")" },
{ "no-pltbind", OPT_bind_not, 0, 0, "Do not bind dynamic symbols (LD_BIND_NOT)" },
{ "task-newline", OPT_task_newline, 0, 0, "Interleave a newline when task is changed" },
{ "chrome", OPT_chrome_trace, 0, 0, "Dump recorded data in chrome trace format" },
{ "diff", OPT_diff, "DATA", 0, "Report differences" },
{ "sort-column", OPT_sort_column, "INDEX", 0, "Sort diff report on column INDEX "
"(default: " stringify(OPT_SORT_COLUMN) ")" },
{ "num-thread", OPT_num_thread, "NUM", 0, "Create NUM recorder threads" },
{ "no-comment", OPT_no_comment, 0, 0, "Don't show comments of returned functions" },
{ "libmcount-single", OPT_libmcount_single, 0, 0, "Use single thread version of libmcount" },
{ "rt-prio", OPT_rt_prio, "PRIO", 0, "Record with real-time (FIFO) priority" },
{ "kernel-depth", 'K', "DEPTH", 0, "Trace kernel functions within DEPTH" },
{ "kernel-buffer", OPT_kernel_bufsize, "SIZE", 0, "Size of kernel tracing buffer (default: 1408K)" },
{ "kernel-skip-out", OPT_kernel_skip_out, 0, 0, "Skip kernel functions outside of user (deprecated)" },
{ "kernel-full", OPT_kernel_full, 0, 0, "Show kernel functions outside of user" },
{ "kernel-only", OPT_kernel_only, 0, 0, "Dump kernel data only" },
{ "flame-graph", OPT_flame_graph, 0, 0, "Dump recorded data in FlameGraph format" },
{ "sample-time", OPT_sample_time, "TIME", 0, "Show flame graph with this sampling time" },
{ "graphviz", OPT_graphviz, 0, 0, "Dump recorded data in DOT format" },
{ "output-fields", 'f', "FIELD", 0, "Show FIELDs in the replay or graph output" },
{ "time-range", 'r', "TIME~TIME", 0, "Show output within the TIME(timestamp or elapsed time) range only" },
{ "Event", 'E', "EVENT", 0, "Enable EVENT to save more information" },
{ "list-event", OPT_list_event, 0, 0, "List available events" },
{ "run-cmd", OPT_run_cmd, "CMDLINE", 0, "Command line that want to execute after tracing data received" },
{ "opt-file", OPT_opt_file, "FILE", 0, "Read command-line options from FILE" },
{ "keep-pid", OPT_keep_pid, 0, 0, "Keep same pid during execution of traced program" },
{ "script", 'S', "SCRIPT", 0, "Run a given SCRIPT in function entry and exit" },
{ "diff-policy", OPT_diff_policy, "POLICY", 0, "Control diff report policy (default: 'abs,compact,no-percent')" },
{ "event-full", OPT_event_full, 0, 0, "Show all events outside of function" },
{ "nest-libcall", 'l', 0, 0, "Show nested library calls" },
{ "record", OPT_record, 0, 0, "Record a new trace data before running command" },
{ "auto-args", 'a', 0, 0, "Show arguments and return value of known functions" },
{ "libname", OPT_libname, 0, 0, "Show libname name with symbol name" },
{ "match", OPT_match_type, "TYPE", 0, "Support pattern match: regex, glob (default: regex)" },
{ "no-randomize-addr", OPT_no_randomize_addr, 0, 0, "Disable ASLR (Address Space Layout Randomization)" },
{ "no-event", OPT_no_event, 0, 0, "Disable (default) events" },
{ "watch", 'W', "POINT", 0, "Watch and report POINT if it's changed" },
{ "signal", OPT_signal, "SIG@act[,act,...]", 0, "Trigger action on those SIGnal" },
{ "srcline", OPT_srcline, 0, 0, "Enable recording source line info" },
{ "help", 'h', 0, 0, "Give this help list" },
{ 0 }
};
static unsigned long parse_size(char *str)
{
unsigned long size;
char *unit;
size = strtoul(str, &unit, 0);
switch (*unit) {
case '\0':
break;
case 'k':
case 'K':
size <<= 10;
break;
case 'm':
case 'M':
size <<= 20;
break;
case 'g':
case 'G':
size <<= 30;
break;
default:
pr_use("invalid size: %s\n", str);
size = 0;
break;
}
return size;
}
static char * opt_add_string(char *old_opt, char *new_opt)
{
return strjoin(old_opt, new_opt, ";");
}
static char * opt_add_prefix_string(char *old_opt, char *prefix, char *new_opt)
{
new_opt = strjoin(xstrdup(prefix), new_opt, "");
if (old_opt) {
old_opt = strjoin(old_opt, new_opt, ";");
free(new_opt);
new_opt = old_opt;
}
return new_opt;
}
static const char * true_str[] = {
"true", "yes", "on", "y", "1",
};
static const char * false_str[] = {
"false", "no", "off", "n", "0",
};
static enum color_setting parse_color(char *arg)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(true_str); i++) {
if (!strcmp(arg, true_str[i]))
return COLOR_ON;
}
for (i = 0; i < ARRAY_SIZE(false_str); i++) {
if (!strcmp(arg, false_str[i]))
return COLOR_OFF;
}
if (!strcmp(arg, "auto"))
return COLOR_AUTO;
return COLOR_UNKNOWN;
}
static int parse_demangle(char *arg)
{
size_t i;
if (!strcmp(arg, "simple"))
return DEMANGLE_SIMPLE;
if (!strcmp(arg, "full")) {
if (support_full_demangle())
return DEMANGLE_FULL;
return DEMANGLE_NOT_SUPPORTED;
}
for (i = 0; i < ARRAY_SIZE(false_str); i++) {
if (!strcmp(arg, false_str[i]))
return DEMANGLE_NONE;
}
return DEMANGLE_ERROR;
}
static void parse_debug_domain(char *arg)
{
struct strv strv = STRV_INIT;
char *tok, *tmp;
int i;
strv_split(&strv, arg, ",");
strv_for_each(&strv, tok, i) {
int level = -1;
tmp = strchr(tok, ':');
if (tmp) {
*tmp++ = '\0';
level = strtol(tmp, NULL, 0);
}
if (!strcmp(tok, "ftrace")) /* for backward compatibility */
dbg_domain[DBG_UFTRACE] = level;
else if (!strcmp(tok, "uftrace"))
dbg_domain[DBG_UFTRACE] = level;
else if (!strcmp(tok, "symbol"))
dbg_domain[DBG_SYMBOL] = level;
else if (!strcmp(tok, "demangle"))
dbg_domain[DBG_DEMANGLE] = level;
else if (!strcmp(tok, "filter"))
dbg_domain[DBG_FILTER] = level;
else if (!strcmp(tok, "fstack"))
dbg_domain[DBG_FSTACK] = level;
else if (!strcmp(tok, "session"))
dbg_domain[DBG_SESSION] = level;
else if (!strcmp(tok, "kernel"))
dbg_domain[DBG_KERNEL] = level;
else if (!strcmp(tok, "mcount"))
dbg_domain[DBG_MCOUNT] = level;
else if (!strcmp(tok, "plthook"))
dbg_domain[DBG_PLTHOOK] = level;
else if (!strcmp(tok, "dynamic"))
dbg_domain[DBG_DYNAMIC] = level;
else if (!strcmp(tok, "event"))
dbg_domain[DBG_EVENT] = level;
else if (!strcmp(tok, "script"))
dbg_domain[DBG_SCRIPT] = level;
else if (!strcmp(tok, "dwarf"))
dbg_domain[DBG_DWARF] = level;
}
dbg_domain_set = true;
strv_free(&strv);
}
static bool has_time_unit(const char *str)
{
if (isalpha(str[strlen(str) - 1]))
return true;
else
return false;
}
static uint64_t parse_any_timestamp(char *str, bool *elapsed)
{
if (*str == '\0')
return 0;
if (has_time_unit(str)) {
*elapsed = true;
return parse_time(str, 3);
}
*elapsed = false;
return parse_timestamp(str);
}
static bool parse_time_range(struct uftrace_time_range *range, char *arg)
{
char *str, *pos;
str = xstrdup(arg);
pos = strchr(str, '~');
if (pos == NULL) {
free(str);
return false;
}
*pos++ = '\0';
range->start = parse_any_timestamp(str, &range->start_elapsed);
range->stop = parse_any_timestamp(pos, &range->stop_elapsed);
free(str);
return true;
}
static char * remove_trailing_slash(char *path)
{
size_t len = strlen(path);
if (path[len - 1] == '/')
path[len - 1] = '\0';
return path;
}
static error_t parse_option(int key, char *arg, struct argp_state *state)
{
struct opts *opts = state->input;
switch (key) {
case 'L':
opts->lib_path = arg;
break;
case 'F':
opts->filter = opt_add_string(opts->filter, arg);
break;
case 'N':
opts->filter = opt_add_prefix_string(opts->filter, "!", arg);
break;
case 'T':
opts->trigger = opt_add_string(opts->trigger, arg);
break;
case 'D':
opts->depth = strtol(arg, NULL, 0);
if (opts->depth <= 0 || opts->depth >= OPT_DEPTH_MAX) {
pr_use("invalid depth given: %s (ignoring..)\n", arg);
opts->depth = OPT_DEPTH_DEFAULT;
}
break;
case 'C':
opts->caller = opt_add_string(opts->caller, arg);
break;
case 'v':
debug++;
break;
case 'd':
opts->dirname = remove_trailing_slash(arg);
break;
case 'b':
opts->bufsize = parse_size(arg);
if (opts->bufsize & (getpagesize() - 1)) {
pr_use("buffer size should be multiple of page size\n");
opts->bufsize = ROUND_UP(opts->bufsize, getpagesize());
}
break;
case 'k':
opts->kernel = true;
break;
case 'K':
opts->kernel = true;
opts->kernel_depth = strtol(arg, NULL, 0);
if (opts->kernel_depth < 1 || opts->kernel_depth > 50) {
pr_use("invalid kernel depth: %s (ignoring...)\n", arg);
opts->kernel_depth = 0;
}
break;
case 'H':
opts->host = arg;
break;
case 's':
opts->sort_keys = opt_add_string(opts->sort_keys, arg);
break;
case 'S':
opts->script_file = arg;
break;
case 't':
/* do not override time-filter if it's already set */
if (parsing_default_opts && opts->threshold)
break;
/* add time-filter to uftrace.data/default.opts */
strv_append(&default_opts, "-t");
strv_append(&default_opts, arg);
opts->threshold = parse_time(arg, 3);
if (opts->range.start || opts->range.stop) {
pr_use("--time-range cannot be used with --time-filter\n");
opts->range.start = opts->range.stop = 0;
}
break;
case 'A':
opts->args = opt_add_string(opts->args, arg);
opts->srcline = true;
break;
case 'R':
opts->retval = opt_add_string(opts->retval, arg);
opts->srcline = true;
break;
case 'a':
opts->auto_args = true;
opts->srcline = true;
break;
case 'l':
/* --nest-libcall implies --force option */
opts->force = true;
opts->nest_libcall = true;
break;
case 'f':
opts->fields = arg;
break;
case 'r':
if (!parse_time_range(&opts->range, arg))
pr_use("invalid time range: %s (ignoring...)\n", arg);
if (opts->threshold) {
pr_use("--time-filter cannot be used with --time-range\n");
opts->threshold = 0;
}
break;
case 'P':
opts->patch = opt_add_string(opts->patch, arg);
break;
case 'U':
opts->patch = opt_add_prefix_string(opts->patch, "!", arg);
break;
case 'Z':
opts->size_filter = strtol(arg, NULL, 0);
if (opts->size_filter <= 0) {
pr_use("--size-filter should be positive\n");
opts->size_filter = 0;
}
break;
case 'E':
if (!strcmp(arg, "list")) {
pr_use("'-E list' is deprecated, use --list-event instead.\n");
opts->list_event = true;
}
else
opts->event = opt_add_string(opts->event, arg);
break;
case 'W':
opts->watch = opt_add_string(opts->watch, arg);
break;
case 'h':
argp_state_help (state, state->out_stream, ARGP_HELP_STD_HELP);
break;
case OPT_flat:
opts->flat = true;
break;
case OPT_no_libcall:
opts->libcall = false;
break;
case OPT_symbols:
opts->print_symtab = true;
break;
case OPT_logfile:
opts->logfile = arg;
break;
case OPT_force:
opts->force = true;
break;
case OPT_task:
opts->show_task = true;
break;
case OPT_tid_filter:
if (strtol(arg, NULL, 0) <= 0)
pr_use("invalid thread id: %s\n", arg);
else
opts->tid = opt_add_string(opts->tid, arg);
break;
case OPT_no_merge:
opts->no_merge = true;
break;
case OPT_nop:
opts->nop = true;
break;
case OPT_time:
opts->time = true;
break;
case OPT_max_stack:
opts->max_stack = strtol(arg, NULL, 0);
if (opts->max_stack <= 0 || opts->max_stack > OPT_RSTACK_MAX) {
pr_use("max stack depth should be >0 and <%d\n",
OPT_RSTACK_MAX);
opts->max_stack = OPT_RSTACK_DEFAULT;
}
break;
case OPT_port:
opts->port = strtol(arg, NULL, 0);
if (opts->port <= 0) {
pr_use("invalid port number: %s (ignoring..)\n", arg);
opts->port = UFTRACE_RECV_PORT;
}
break;
case OPT_nopager:
opts->use_pager = false;
break;
case OPT_avg_total:
opts->avg_total = true;
break;
case OPT_avg_self:
opts->avg_self = true;
break;
case OPT_color:
opts->color = parse_color(arg);
if (opts->color == COLOR_UNKNOWN) {
pr_use("unknown color setting: %s (ignoring..)\n", arg);
opts->color = COLOR_AUTO;
}
break;
case OPT_disabled:
opts->disabled = true;
break;
case OPT_demangle:
demangler = parse_demangle(arg);
if (demangler == DEMANGLE_ERROR) {
pr_use("unknown demangle value: %s (ignoring..)\n", arg);
demangler = DEMANGLE_SIMPLE;
}
else if (demangler == DEMANGLE_NOT_SUPPORTED) {
pr_use("'%s' demangler is not supported\n", arg);
demangler = DEMANGLE_SIMPLE;
}
break;
case OPT_dbg_domain:
parse_debug_domain(arg);
break;
case OPT_report:
opts->report = true;
break;
case OPT_column_view:
opts->column_view = true;
break;
case OPT_column_offset:
opts->column_offset = strtol(arg, NULL, 0);
if (opts->column_offset < 0)
opts->column_offset = OPT_COLUMN_OFFSET;
break;
case OPT_bind_not:
opts->want_bind_not = true;
break;
case OPT_task_newline:
opts->task_newline = true;
break;
case OPT_chrome_trace:
opts->chrome_trace = true;
break;
case OPT_flame_graph:
opts->flame_graph = true;
break;
case OPT_graphviz:
opts->graphviz = true;
break;
case OPT_diff:
opts->diff = arg;
break;
case OPT_diff_policy:
opts->diff_policy = arg;
break;
case OPT_sort_column:
opts->sort_column = strtol(arg, NULL, 0);
if (opts->sort_column < 0 || opts->sort_column > OPT_SORT_COLUMN) {
pr_use("invalid column number: %d\n", opts->sort_column);
pr_use("force to set it to --sort-column=%d for diff percentage\n",
OPT_SORT_COLUMN);
opts->sort_column = OPT_SORT_COLUMN;
}
break;
case OPT_num_thread:
opts->nr_thread = strtol(arg, NULL, 0);
if (opts->nr_thread < 0) {
pr_use("invalid thread number: %s\n", arg);
opts->nr_thread = 0;
}
break;
case OPT_no_comment:
opts->comment = false;
break;
case OPT_libmcount_single:
opts->libmcount_single = true;
break;
case OPT_rt_prio:
opts->rt_prio = strtol(arg, NULL, 0);
if (opts->rt_prio < 1 || opts->rt_prio > 99) {
pr_use("invalid rt prioity: %d (ignoring...)\n",
opts->rt_prio);
opts->rt_prio = 0;
}
break;
case OPT_kernel_bufsize:
opts->kernel_bufsize = parse_size(arg);
if (opts->kernel_bufsize & (getpagesize() - 1)) {
pr_use("buffer size should be multiple of page size\n");
opts->kernel_bufsize = ROUND_UP(opts->kernel_bufsize,
getpagesize());
}
break;
case OPT_kernel_skip_out: /* deprecated */
opts->kernel_skip_out = true;
break;
case OPT_kernel_full:
opts->kernel_skip_out = false;
/* see setup_kernel_tracing() also */
break;
case OPT_kernel_only:
opts->kernel_only = true;
break;
case OPT_sample_time:
opts->sample_time = parse_time(arg, 9);
break;
case OPT_list_event:
opts->list_event = true;
break;
case OPT_run_cmd:
if (opts->run_cmd) {
pr_warn("intermediate --run-cmd argument is ignored.\n");
free_parsed_cmdline(opts->run_cmd);
}
opts->run_cmd = parse_cmdline(arg, NULL);
break;
case OPT_opt_file:
opts->opt_file = arg;
break;
case OPT_keep_pid:
opts->keep_pid = true;
break;
case OPT_event_full:
opts->event_skip_out = false;
break;
case OPT_record:
opts->record = true;
break;
case OPT_libname:
opts->libname = true;
break;
case OPT_match_type:
opts->patt_type = parse_filter_pattern(arg);
if (opts->patt_type == PATT_NONE) {
pr_use("invalid match pattern: %s (ignoring...)\n", arg);
opts->patt_type = PATT_REGEX;
}
break;
case OPT_no_randomize_addr:
opts->no_randomize_addr = true;
break;
case OPT_no_event:
opts->no_event = true;
break;
case OPT_signal:
opts->sig_trigger = opt_add_string(opts->sig_trigger, arg);
break;
case OPT_srcline:
opts->srcline = true;
break;
case ARGP_KEY_ARG:
if (state->arg_num) {
/*
* This is a second non-option argument.
* Returning ARGP_ERR_UNKNOWN will pass control to
* the ARGP_KEY_ARGS case.
*/
return ARGP_ERR_UNKNOWN;
}
if (!strcmp("record", arg))
opts->mode = UFTRACE_MODE_RECORD;
else if (!strcmp("replay", arg))
opts->mode = UFTRACE_MODE_REPLAY;
else if (!strcmp("live", arg))
opts->mode = UFTRACE_MODE_LIVE;
else if (!strcmp("report", arg))
opts->mode = UFTRACE_MODE_REPORT;
else if (!strcmp("info", arg))
opts->mode = UFTRACE_MODE_INFO;
else if (!strcmp("recv", arg))
opts->mode = UFTRACE_MODE_RECV;
else if (!strcmp("dump", arg))
opts->mode = UFTRACE_MODE_DUMP;
else if (!strcmp("graph", arg))
opts->mode = UFTRACE_MODE_GRAPH;
else if (!strcmp("script", arg))
opts->mode = UFTRACE_MODE_SCRIPT;
else if (!strcmp("tui", arg))
opts->mode = UFTRACE_MODE_TUI;
else
return ARGP_ERR_UNKNOWN; /* almost same as fall through */
break;
case ARGP_KEY_ARGS:
/*
* process remaining non-option arguments
*/
if (opts->mode == UFTRACE_MODE_INVALID)
opts->mode = UFTRACE_MODE_DEFAULT;
opts->exename = state->argv[state->next];
opts->idx = state->next;
break;
case ARGP_KEY_NO_ARGS:
case ARGP_KEY_END:
if (opts->opt_file)
break;
if (state->arg_num < 1)
argp_usage(state);
if (opts->exename == NULL) {
switch (opts->mode) {
case UFTRACE_MODE_RECORD:
case UFTRACE_MODE_LIVE:
argp_usage(state);
break;
default:
/* will be set after read_ftrace_info() */
break;
}
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static void parse_opt_file(int *argc, char ***argv, char *filename, struct opts *opts)
{
int file_argc;
char **file_argv;
char *buf;
struct stat stbuf;
FILE *fp;
struct argp file_argp = {
.options = uftrace_options,
.parser = parse_option,
.args_doc = "[record|replay|live|report|info|dump|recv|graph|script|tui] [<program>]",
.doc = "uftrace -- function (graph) tracer for userspace",
};
char *orig_exename = NULL;
int orig_idx = 0;
if (stat(filename, &stbuf) < 0) {
pr_use("Cannot use opt-file: %s: %m\n", filename);
exit(0);
}
buf = xmalloc(stbuf.st_size + 1);
fp = fopen(filename, "r");
if (fp == NULL)
pr_err("Open failed: %s", filename);
fread_all(buf, stbuf.st_size, fp);
fclose(fp);
buf[stbuf.st_size] = '\0';
file_argv = parse_cmdline(buf, &file_argc);
/* clear opt_file for error reporting */
opts->opt_file = NULL;
if (opts->idx) {
orig_idx = opts->idx;
orig_exename = opts->exename;
opts->idx = 0;
}
argp_parse(&file_argp, file_argc, file_argv,
ARGP_IN_ORDER | ARGP_PARSE_ARGV0 | ARGP_NO_ERRS,
NULL, opts);
/* overwrite argv only if it's not given on command line */
if (orig_idx == 0 && opts->idx) {
*argc = file_argc;
*argv = file_argv;
/* mark it to free at the end */
opts->opt_file = filename;
}
else {
opts->idx = orig_idx;
opts->exename = orig_exename;
free_parsed_cmdline(file_argv);
}
free(buf);
}
/*
* Parse options in a script file header. For example,
*
* # uftrace-option: -F main -A malloc@arg1
* def uftrace_entry():
* pass
* ...
*
* Note that it only handles some options like filter, trigger,
* argument, return values and maybe some more.
*/
void parse_script_opt(struct opts *opts)
{
FILE *fp;
int orig_idx;
int opt_argc;
char **opt_argv;
char *line = NULL;
size_t len = 0;
static const char optname[] = "uftrace-option";
struct argp opt_argp = {
.options = uftrace_options,
.parser = parse_option,
.args_doc = "[record|replay|live|report|info|dump|recv|graph|script|tui] [<program>]",
.doc = "uftrace -- function (graph) tracer for userspace",
};
if (opts->script_file == NULL)
return;
fp = fopen(opts->script_file, "r");
if (fp == NULL)
pr_err("cannot open script file: %s", opts->script_file);
while (getline(&line, &len, fp) > 0) {
char *pos;
if (line[0] != '#')
continue;
pos = line + 1;
while (isspace(*pos))
pos++;
if (strncmp(pos, optname, strlen(optname)))
continue;
/* extract option value */
pos = strchr(line, ':');
if (pos == NULL)
break;
pr_dbg("adding record option from script: %s", pos + 1);
opt_argv = parse_cmdline(pos + 1, &opt_argc);
orig_idx = opts->idx;