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/*
* Python script binding for function entry and exit
*
* Copyright (C) 2017-2018, LG Electronics, Honggyu Kim <hong.gyu.kim@lge.com>
*
* Released under the GPL v2.
*/
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include "uftrace.h"
#include "utils/event.h"
#include "utils/filter.h"
#include "utils/fstack.h"
#include "utils/script.h"
#include "utils/symbol.h"
#include "utils/utils.h"
#include "version.h"
#include "libtraceevent/event-parse.h"
static int run_script_for_rstack(struct uftrace_data *handle, struct uftrace_task_reader *task,
struct uftrace_opts *opts)
{
struct uftrace_record *rstack = task->rstack;
struct uftrace_session_link *sessions = &handle->sessions;
struct uftrace_symbol *sym = NULL;
char *symname = NULL;
sym = task_find_sym(sessions, task, rstack);
symname = symbol_getname(sym, rstack->addr);
/* skip it if --no-libcall is given */
if (!opts->libcall && sym && sym->type == ST_PLT_FUNC)
goto out;
task->timestamp_last = task->timestamp;
task->timestamp = rstack->time;
if (rstack->type == UFTRACE_ENTRY) {
struct script_context sc_ctx = {
0,
};
struct uftrace_fstack *fstack;
struct uftrace_trigger tr = {
.flags = 0,
};
int depth;
int ret;
ret = fstack_entry(task, rstack, &tr);
if (ret < 0)
goto out;
/* display depth is set in fstack_entry() */
depth = task->display_depth;
fstack = fstack_get(task, task->stack_count - 1);
fstack_update(UFTRACE_ENTRY, task, fstack);
if (!script_match_filter(symname))
goto out;
sc_ctx.tid = task->tid;
sc_ctx.depth = depth; /* display depth */
sc_ctx.timestamp = rstack->time;
sc_ctx.address = rstack->addr;
sc_ctx.name = symname;
if (tr.flags & TRIGGER_FL_ARGUMENT && opts->show_args) {
sc_ctx.argbuf = task->args.data;
sc_ctx.arglen = task->args.len;
sc_ctx.argspec = task->args.args;
}
/* script hooking for function entry */
script_uftrace_entry(&sc_ctx);
}
else if (rstack->type == UFTRACE_EXIT) {
struct script_context sc_ctx = {
0,
};
struct uftrace_fstack *fstack;
/* function exit */
fstack = fstack_get(task, task->stack_count);
if (fstack_enabled && fstack && !(fstack->flags & FSTACK_FL_NORECORD)) {
int depth = fstack_update(UFTRACE_EXIT, task, fstack);
if (!script_match_filter(symname)) {
fstack_exit(task);
goto out;
}
/* display depth is set before passing rstack */
rstack->depth = depth;
/* setup context for script execution */
sc_ctx.tid = task->tid;
sc_ctx.depth = rstack->depth;
sc_ctx.timestamp = rstack->time;
sc_ctx.duration = fstack->total_time;
sc_ctx.address = rstack->addr;
sc_ctx.name = symname;
if (rstack->more && opts->show_args) {
sc_ctx.argbuf = task->args.data;
sc_ctx.arglen = task->args.len;
sc_ctx.argspec = task->args.args;
}
/* script hooking for function exit */
script_uftrace_exit(&sc_ctx);
}
fstack_exit(task);
}
else if (rstack->type == UFTRACE_EVENT) {
struct script_context sc_ctx = {
.tid = task->tid,
.depth = rstack->depth,
.timestamp = rstack->time,
.address = rstack->addr,
};
sc_ctx.name = event_get_name(handle, rstack->addr);
sc_ctx.argbuf = event_get_data_str(rstack->addr, task->args.data, false);
script_uftrace_event(&sc_ctx);
free(sc_ctx.name);
free(sc_ctx.argbuf);
}
else if (rstack->type == UFTRACE_LOST) {
/* Do nothing as of now */
}
out:
symbol_putname(sym, symname);
return 0;
}
int command_script(int argc, char *argv[], struct uftrace_opts *opts)
{
int ret;
struct uftrace_data handle;
struct uftrace_task_reader *task;
struct script_info info = {
.name = opts->script_file,
.version = UFTRACE_VERSION,
};
if (!SCRIPT_ENABLED) {
pr_warn("script command is not supported due to missing libpython2.7.so\n");
return -1;
}
if (!opts->script_file) {
pr_out("Usage: uftrace script (-S|--script) <script_file>\n");
return -1;
}
if (opts->record) {
char *script_file;
/* parse in-script record option - "uftrace_options" */
parse_script_opt(opts);
script_file = opts->script_file;
opts->script_file = NULL;
pr_dbg("start recording before running a script\n");
ret = command_record(argc, argv, opts);
if (ret < 0) {
pr_warn("cannot record data: %m\n");
return -1;
}
opts->script_file = script_file;
}
__fsetlocking(outfp, FSETLOCKING_BYCALLER);
__fsetlocking(logfp, FSETLOCKING_BYCALLER);
ret = open_data_file(opts, &handle);
if (ret < 0) {
pr_warn("cannot open record data: %s: %m\n", opts->dirname);
return -1;
}
fstack_setup_filters(opts, &handle);
strv_copy(&info.cmds, argc, argv);
/* initialize script */
if (script_init(&info, opts->patt_type) < 0) {
ret = -1;
goto out;
}
while (read_rstack(&handle, &task) == 0 && !uftrace_done) {
if (!fstack_check_opts(task, opts))
continue;
ret = run_script_for_rstack(&handle, task, opts);
if (ret)
break;
}
/* dtor for script support */
script_uftrace_end();
out:
script_finish();
close_data_file(opts, &handle);
strv_free(&info.cmds);
return ret;
}
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