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filter.c
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#include <stdio.h>
#include <stdlib.h>
#include <regex.h>
#include <fnmatch.h>
#include <sys/utsname.h>
#include <link.h>
/* This should be defined before #include "utils.h" */
#define PR_FMT "filter"
#define PR_DOMAIN DBG_FILTER
#include "uftrace.h"
#include "libmcount/mcount.h"
#include "utils/filter.h"
#include "utils/symbol.h"
#include "utils/rbtree.h"
#include "utils/utils.h"
#include "utils/list.h"
#include "utils/dwarf.h"
static void snprintf_trigger_read(char *buf, size_t len,
enum trigger_read_type type)
{
buf[0] = '\0';
if (type == TRIGGER_READ_NONE)
snprintf(buf, len, "none");
if (type & TRIGGER_READ_PROC_STATM)
snprintf(buf, len, "%s%s", buf[0] ? "|" : "", "proc/statm");
if (type & TRIGGER_READ_PAGE_FAULT)
snprintf(buf, len, "%s%s", buf[0] ? "|" : "", "page-fault");
if (type & TRIGGER_READ_PMU_CYCLE)
snprintf(buf, len, "%s%s", buf[0] ? "|" : "", "pmu-cycle");
if (type & TRIGGER_READ_PMU_CACHE)
snprintf(buf, len, "%s%s", buf[0] ? "|" : "", "pmu-cache");
if (type & TRIGGER_READ_PMU_BRANCH)
snprintf(buf, len, "%s%s", buf[0] ? "|" : "", "pmu-branch");
}
static void print_trigger(struct uftrace_trigger *tr)
{
if (tr->flags & TRIGGER_FL_DEPTH)
pr_dbg("\ttrigger: depth %d\n", tr->depth);
if (tr->flags & TRIGGER_FL_FILTER) {
if (tr->fmode == FILTER_MODE_IN)
pr_dbg("\ttrigger: filter IN\n");
else
pr_dbg("\ttrigger: filter OUT\n");
}
if (tr->flags & TRIGGER_FL_BACKTRACE)
pr_dbg("\ttrigger: backtrace\n");
if (tr->flags & TRIGGER_FL_TRACE)
pr_dbg("\ttrigger: trace\n");
if (tr->flags & TRIGGER_FL_TRACE_ON)
pr_dbg("\ttrigger: trace_on\n");
if (tr->flags & TRIGGER_FL_TRACE_OFF)
pr_dbg("\ttrigger: trace_off\n");
if (tr->flags & TRIGGER_FL_RECOVER)
pr_dbg("\ttrigger: recover\n");
if (tr->flags & TRIGGER_FL_FINISH)
pr_dbg("\ttrigger: finish\n");
if (tr->flags & TRIGGER_FL_ARGUMENT) {
struct uftrace_arg_spec *arg;
pr_dbg("\ttrigger: argument\n");
list_for_each_entry(arg, tr->pargs, list) {
if (arg->idx == RETVAL_IDX)
continue;
pr_dbg("\t\t arg%d: %c%d\n", arg->idx,
ARG_SPEC_CHARS[arg->fmt], arg->size * 8);
}
}
if (tr->flags & TRIGGER_FL_RETVAL) {
struct uftrace_arg_spec *arg;
pr_dbg("\ttrigger: return value\n");
list_for_each_entry(arg, tr->pargs, list) {
if (arg->idx != RETVAL_IDX)
continue;
pr_dbg("\t\t retval%d: %c%d\n", arg->idx,
ARG_SPEC_CHARS[arg->fmt], arg->size * 8);
}
}
if (tr->flags & TRIGGER_FL_COLOR)
pr_dbg("\ttrigger: color '%c'\n", tr->color);
if (tr->flags & TRIGGER_FL_TIME_FILTER)
pr_dbg("\ttrigger: time filter %"PRIu64"\n", tr->time);
if (tr->flags & TRIGGER_FL_CALLER)
pr_dbg("\ttrigger: caller filter\n");
if (tr->flags & TRIGGER_FL_READ) {
char buf[1024];
snprintf_trigger_read(buf, sizeof(buf), tr->read);
pr_dbg("\ttrigger: read (%s)\n", buf);
}
}
/**
* uftrace_count_filter - count matching filters in @root
* @root - root of rbtree which has filters
* @flag - filter flag to match
*/
int uftrace_count_filter(struct rb_root *root, unsigned long flag)
{
struct rb_node *entry;
struct uftrace_filter *iter;
int count = 0;
entry = rb_first(root);
while (entry) {
iter = rb_entry(entry, struct uftrace_filter, node);
if (iter->trigger.flags & flag)
count++;
entry = rb_next(entry);
}
return count;
}
static bool match_ip(struct uftrace_filter *filter, unsigned long ip)
{
return filter->start <= ip && ip < filter->end;
}
/**
* uftrace_match_filter - try to match @ip with filters in @root
* @ip - instruction address to match
* @root - root of rbtree which has filters
* @tr - trigger data
*/
struct uftrace_filter *uftrace_match_filter(uint64_t ip, struct rb_root *root,
struct uftrace_trigger *tr)
{
struct rb_node *parent = NULL;
struct rb_node **p = &root->rb_node;
struct uftrace_filter *iter;
while (*p) {
parent = *p;
iter = rb_entry(parent, struct uftrace_filter, node);
if (match_ip(iter, ip)) {
*tr = iter->trigger;
pr_dbg2("filter match: %s\n", iter->name);
if (dbg_domain[DBG_FILTER] >= 3)
print_trigger(tr);
return iter;
}
if (iter->start > ip)
p = &parent->rb_left;
else
p = &parent->rb_right;
}
return NULL;
}
static void add_arg_spec(struct list_head *arg_list, struct uftrace_arg_spec *arg,
bool exact_match)
{
bool found = false;
struct uftrace_arg_spec *oarg, *narg;
list_for_each_entry(oarg, arg_list, list) {
if (arg->type != oarg->type)
continue;
switch (arg->type) {
case ARG_TYPE_INDEX:
case ARG_TYPE_FLOAT:
if (arg->idx == oarg->idx)
found = true;
break;
case ARG_TYPE_REG:
if (arg->reg_idx == oarg->reg_idx)
found = true;
break;
case ARG_TYPE_STACK:
if (arg->stack_ofs == oarg->stack_ofs)
found = true;
break;
}
if (found)
break;
}
if (found) {
/* do not overwrite exact match by regex match */
if (exact_match || !oarg->exact) {
oarg->fmt = arg->fmt;
oarg->size = arg->size;
oarg->exact = exact_match;
oarg->type = arg->type;
oarg->reg_idx = arg->reg_idx;
if (arg->fmt == ARG_FMT_ENUM)
oarg->enum_str = xstrdup(arg->enum_str);
}
}
else {
narg = xmalloc(sizeof(*narg));
narg->idx = arg->idx;
narg->fmt = arg->fmt;
narg->size = arg->size;
narg->exact = exact_match;
narg->type = arg->type;
narg->reg_idx = arg->reg_idx;
if (arg->fmt == ARG_FMT_ENUM)
narg->enum_str = xstrdup(arg->enum_str);
list_add_tail(&narg->list, &oarg->list);
}
}
void add_trigger(struct uftrace_filter *filter, struct uftrace_trigger *tr,
bool exact_match)
{
filter->trigger.flags |= tr->flags;
if (tr->flags & TRIGGER_FL_DEPTH)
filter->trigger.depth = tr->depth;
if (tr->flags & TRIGGER_FL_FILTER)
filter->trigger.fmode = tr->fmode;
if (tr->flags & TRIGGER_FL_TRACE_ON)
filter->trigger.flags &= ~TRIGGER_FL_TRACE_OFF;
if (tr->flags & TRIGGER_FL_TRACE_OFF)
filter->trigger.flags &= ~TRIGGER_FL_TRACE_ON;
if (tr->flags & (TRIGGER_FL_ARGUMENT | TRIGGER_FL_RETVAL)) {
struct uftrace_arg_spec *arg;
list_for_each_entry(arg, tr->pargs, list)
add_arg_spec(&filter->args, arg, exact_match);
}
if (tr->flags & TRIGGER_FL_COLOR)
filter->trigger.color = tr->color;
if (tr->flags & TRIGGER_FL_TIME_FILTER)
filter->trigger.time = tr->time;
if (tr->flags & TRIGGER_FL_READ)
filter->trigger.read |= tr->read;
}
static int add_filter(struct rb_root *root, struct uftrace_filter *filter,
struct uftrace_trigger *tr, bool exact_match,
struct debug_info *dinfo,
struct uftrace_filter_setting *setting)
{
struct rb_node *parent = NULL;
struct rb_node **p = &root->rb_node;
struct uftrace_filter *iter, *new;
struct uftrace_filter *auto_arg = NULL;
struct uftrace_filter *auto_ret = NULL;
unsigned long orig_flags = tr->flags;
if ((tr->flags & TRIGGER_FL_ARGUMENT) && list_empty(tr->pargs)) {
auto_arg = find_auto_argspec(filter, tr, dinfo, setting);
if (auto_arg == NULL)
tr->flags &= ~TRIGGER_FL_ARGUMENT;
}
if ((tr->flags & TRIGGER_FL_RETVAL) && list_empty(tr->pargs)) {
auto_ret = find_auto_retspec(filter, tr, dinfo, setting);
if (auto_ret == NULL)
tr->flags &= ~TRIGGER_FL_RETVAL;
}
if (tr->flags == 0 && orig_flags) {
/* restored for regex filter */
tr->flags = orig_flags;
return 0;
}
pr_dbg2("add filter for %s\n", filter->name);
if (dbg_domain[DBG_FILTER] >= 3)
print_trigger(tr);
while (*p) {
parent = *p;
iter = rb_entry(parent, struct uftrace_filter, node);
if (iter->start == filter->start) {
unsigned long args_flags = tr->flags;
args_flags &= ~TRIGGER_FL_AUTO_ARGS;
/* ignore auto-args if it already has argspec */
if ((tr->flags & TRIGGER_FL_AUTO_ARGS) &&
(iter->trigger.flags & args_flags)) {
tr->flags = orig_flags;
return 0;
}
add_trigger(iter, tr, exact_match);
if (auto_arg)
add_trigger(iter, &auto_arg->trigger, exact_match);
if (auto_ret)
add_trigger(iter, &auto_ret->trigger, exact_match);
tr->flags = orig_flags;
return 1;
}
if (iter->start > filter->start)
p = &parent->rb_left;
else
p = &parent->rb_right;
}
new = xmalloc(sizeof(*new));
memcpy(new, filter, sizeof(*new));
new->trigger.flags = 0;
new->trigger.read = 0;
INIT_LIST_HEAD(&new->args);
new->trigger.pargs = &new->args;
add_trigger(new, tr, exact_match);
if (auto_arg)
add_trigger(new, &auto_arg->trigger, exact_match);
if (auto_ret)
add_trigger(new, &auto_ret->trigger, exact_match);
tr->flags = orig_flags;
rb_link_node(&new->node, parent, p);
rb_insert_color(&new->node, root);
return 1;
}
struct {
enum uftrace_pattern_type type;
const char *name;
} filter_patterns[] = {
{ PATT_SIMPLE, "simple" },
{ PATT_REGEX, "regex" },
{ PATT_GLOB, "glob" },
};
void init_filter_pattern(enum uftrace_pattern_type type,
struct uftrace_pattern *p, char *str)
{
if (strpbrk(str, REGEX_CHARS) == NULL)
type = PATT_SIMPLE;
p->type = type;
p->patt = xstrdup(str);
if (type == PATT_REGEX) {
/* to handle full demangled operator new and delete specially */
const char *str_operator = "operator ";
if (!strncmp(str, str_operator, 9)) {
p->type = PATT_SIMPLE;
}
else if (regcomp(&p->re, str, REG_NOSUB | REG_EXTENDED)) {
pr_dbg("regex pattern failed: %s\n", str);
p->type = PATT_SIMPLE;
}
}
}
bool match_filter_pattern(struct uftrace_pattern *p, char *name)
{
switch (p->type) {
case PATT_SIMPLE:
return !strcmp(p->patt, name);
case PATT_REGEX:
return !regexec(&p->re, name, 0, NULL, 0);
case PATT_GLOB:
return !fnmatch(p->patt, name, 0);
default:
return false;
}
}
void free_filter_pattern(struct uftrace_pattern *p)
{
free(p->patt);
p->patt = NULL;
if (p->type == PATT_REGEX)
regfree(&p->re);
p->type = PATT_NONE;
}
enum uftrace_pattern_type parse_filter_pattern(const char *str)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(filter_patterns); i++) {
if (!strcmp(str, filter_patterns[i].name))
return filter_patterns[i].type;
}
return PATT_NONE;
}
const char * get_filter_pattern(enum uftrace_pattern_type ptype)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(filter_patterns); i++) {
if (filter_patterns[i].type == ptype)
return filter_patterns[i].name;
}
return "none";
}
static bool is_arm_machine(struct uftrace_filter_setting *setting)
{
return setting->arch == UFT_CPU_ARM;
}
static int check_so_cb(struct dl_phdr_info *info, size_t size, void *data)
{
const char *soname = data;
int so_used = 0;
if (!strncmp(basename(info->dlpi_name), soname, strlen(soname)))
so_used = 1;
return so_used;
}
/* check whether the given library name is in shared object list */
static int has_shared_object(const char *soname)
{
static int so_used = -1;
if (so_used != -1)
return so_used;
so_used = dl_iterate_phdr(check_so_cb, (void*)soname);
return so_used;
}
/* argument_spec = arg1/i32,arg2/x64,... */
static int parse_spec(char *str, struct uftrace_arg_spec *arg, char *suffix,
struct uftrace_filter_setting *setting)
{
int fmt = ARG_FMT_AUTO;
int size = setting->lp64 ? 8 : 4;
int type = arg->type;
int bit;
char *p;
if (suffix == NULL || *suffix == '\0')
goto out;
if (*suffix == '%')
goto type;
suffix++;
switch (*suffix) {
case 'd':
fmt = ARG_FMT_AUTO;
break;
case 'i':
fmt = ARG_FMT_SINT;
break;
case 'u':
fmt = ARG_FMT_UINT;
break;
case 'x':
fmt = ARG_FMT_HEX;
break;
case 's':
fmt = ARG_FMT_STR;
break;
case 'c':
fmt = ARG_FMT_CHAR;
size = sizeof(char);
break;
case 'f':
fmt = ARG_FMT_FLOAT;
type = ARG_TYPE_FLOAT;
size = sizeof(double);
break;
case 'S':
if (has_shared_object("libc++.so")) {
static bool warned = false;
if (!warned) {
pr_warn("std::string display for libc++.so is "
"not supported.\n");
warned = true;
}
return -1;
}
fmt = ARG_FMT_STD_STRING;
break;
case 'p':
fmt = ARG_FMT_FUNC_PTR;
break;
case 'e':
fmt = ARG_FMT_ENUM;
if (suffix[1] != ':' || (!isalpha(suffix[2]) && suffix[2] != '_')) {
pr_use("invalid enum spec: %s\n", suffix);
return -1;
}
arg->enum_str = xstrdup(&suffix[2]);
p = strchr(arg->enum_str, '%');
if (p)
*p = '\0';
pr_dbg2("parsing argspec for enum: %s\n", arg->enum_str);
goto out;
default:
pr_use("unsupported argument type: %s\n", str);
return -1;
}
suffix++;
if (*suffix == '\0')
goto out;
if (*suffix == '%')
goto type;
bit = strtol(suffix, &suffix, 10);
switch (bit) {
case 8:
case 16:
case 32:
case 64:
size = bit / 8;
break;
case 80:
if (fmt == ARG_FMT_FLOAT) {
size = bit / 8;
break;
}
/* fall through */
default:
pr_use("unsupported argument size: %s\n", str);
return -1;
}
type:
if (*suffix == '%') {
suffix++;
if (!strncmp(suffix, "stack", 5)) {
arg->stack_ofs = strtol(suffix+5, NULL, 0);
type = ARG_TYPE_STACK;
}
else {
arg->reg_idx = arch_register_index(setting->arch, suffix);
type = ARG_TYPE_REG;
if (arg->reg_idx < 0) {
pr_use("unknown register name: %s\n", str);
return -1;
}
}
}
out:
/* it seems ARM falls back 'long double' to 'double' */
if (fmt == ARG_FMT_FLOAT && size == 10 && is_arm_machine(setting))
size = 8;
arg->fmt = fmt;
arg->size = size;
arg->type = type;
return 0;
}
/* argument_spec = arg1/i32,arg2/x64%reg,arg3%stack+1,... */
static int parse_argument_spec(char *str, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
struct uftrace_arg_spec *arg;
char *suffix;
if (!isdigit(str[3])) {
pr_use("skipping invalid argument: %s\n", str);
return -1;
}
arg = xmalloc(sizeof(*arg));
INIT_LIST_HEAD(&arg->list);
arg->idx = strtol(str+3, &suffix, 0);
arg->type = ARG_TYPE_INDEX;
if (parse_spec(str, arg, suffix, setting) == -1) {
free(arg);
return -1;
}
tr->flags |= TRIGGER_FL_ARGUMENT;
list_add_tail(&arg->list, tr->pargs);
return 0;
}
/* argument_spec = retval/i32 or retval/x64 ... */
static int parse_retval_spec(char *str, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
struct uftrace_arg_spec *arg;
char *suffix;
arg = xmalloc(sizeof(*arg));
INIT_LIST_HEAD(&arg->list);
arg->idx = 0;
arg->type = ARG_TYPE_INDEX;
/* set suffix after string "retval" */
suffix = str + 6;
if (parse_spec(str, arg, suffix, setting) == -1) {
free(arg);
return -1;
}
tr->flags |= TRIGGER_FL_RETVAL;
list_add_tail(&arg->list, tr->pargs);
return 0;
}
/* argument_spec = fparg1/32,fparg2/64%stack+1,... */
static int parse_float_argument_spec(char *str, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
struct uftrace_arg_spec *arg;
char *suffix;
if (!isdigit(str[5])) {
pr_use("skipping invalid argument: %s\n", str);
return -1;
}
arg = xmalloc(sizeof(*arg));
INIT_LIST_HEAD(&arg->list);
arg->idx = strtol(str+5, &suffix, 0);
arg->fmt = ARG_FMT_FLOAT;
arg->type = ARG_TYPE_FLOAT;
arg->size = sizeof(double);
if (*suffix == '/') {
long size = strtol(suffix+1, &suffix, 0);
if (size != 32 && size != 64 && size != 80) {
pr_use("invalid argument size: %s\n", str);
free(arg);
return -1;
}
if (size == 80 && is_arm_machine(setting))
size = 64;
arg->size = size / 8;
}
if (*suffix == '%') {
suffix++;
if (!strncmp(suffix, "stack", 5)) {
arg->stack_ofs = strtol(suffix+5, NULL, 0);
arg->type = ARG_TYPE_STACK;
}
else {
arg->reg_idx = arch_register_index(setting->arch, suffix);
arg->type = ARG_TYPE_REG;
if (arg->reg_idx < 0) {
pr_use("unknown register name: %s\n", str);
free(arg);
return -1;
}
}
}
tr->flags |= TRIGGER_FL_ARGUMENT;
list_add_tail(&arg->list, tr->pargs);
return 0;
}
static int parse_depth_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_DEPTH;
tr->depth = strtoul(action + 6, NULL, 10);
if (tr->depth < 0 || tr->depth > MCOUNT_RSTACK_MAX) {
pr_use("skipping invalid trigger depth: %d\n", tr->depth);
return -1;
}
return 0;
}
static int parse_time_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_TIME_FILTER;
tr->time = parse_time(action + 5, 3);
return 0;
}
static int parse_read_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
const char *target = action + 5;
if (!strcmp(target, "proc/statm"))
tr->read |= TRIGGER_READ_PROC_STATM;
if (!strcmp(target, "page-fault"))
tr->read |= TRIGGER_READ_PAGE_FAULT;
if (!strcmp(target, "pmu-cycle"))
tr->read |= TRIGGER_READ_PMU_CYCLE;
if (!strcmp(target, "pmu-cache"))
tr->read |= TRIGGER_READ_PMU_CACHE;
if (!strcmp(target, "pmu-branch"))
tr->read |= TRIGGER_READ_PMU_BRANCH;
/* set READ flag only if valid type set */
if (tr->read)
tr->flags |= TRIGGER_FL_READ;
return 0;
}
static int parse_color_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
const char *color = action + 6;
if (!strcmp(color, "red"))
tr->color = COLOR_CODE_RED;
else if (!strcmp(color, "green"))
tr->color = COLOR_CODE_GREEN;
else if (!strcmp(color, "blue"))
tr->color = COLOR_CODE_BLUE;
else if (!strcmp(color, "yellow"))
tr->color = COLOR_CODE_YELLOW;
else if (!strcmp(color, "magenta"))
tr->color = COLOR_CODE_MAGENTA;
else if (!strcmp(color, "cyan"))
tr->color = COLOR_CODE_CYAN;
else if (!strcmp(color, "bold"))
tr->color = COLOR_CODE_BOLD;
else if (!strcmp(color, "gray"))
tr->color = COLOR_CODE_GRAY;
else {
pr_use("ignoring invalid color: %s\n", color);
return 0;
}
tr->flags |= TRIGGER_FL_COLOR;
return 0;
}
static int parse_trace_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
action += 5;
if (*action == '_' || *action == '-')
action++;
if (*action == '\0')
tr->flags |= TRIGGER_FL_TRACE;
else if (!strcasecmp(action, "on"))
tr->flags |= TRIGGER_FL_TRACE_ON;
else if (!strcasecmp(action, "off"))
tr->flags |= TRIGGER_FL_TRACE_OFF;
else
pr_use("skipping invalid trace action: %s\n", action);
return 0;
}
static int parse_backtrace_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_BACKTRACE;
return 0;
}
static int parse_recover_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_RECOVER;
return 0;
}
static int parse_finish_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_FINISH;
return 0;
}
static int parse_filter_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_FILTER;
tr->fmode = FILTER_MODE_IN;
return 0;
}
static int parse_notrace_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_FILTER;
tr->fmode = FILTER_MODE_OUT;
return 0;
}
static int parse_auto_args_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_ARGUMENT | TRIGGER_FL_RETVAL;
return 0;
}
static int parse_caller_action(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting)
{
tr->flags |= TRIGGER_FL_CALLER;
return 0;
}
struct trigger_action_parser {
const char *name;
int (*parse)(char *action, struct uftrace_trigger *tr,
struct uftrace_filter_setting *setting);
unsigned long flags;
};
static const struct trigger_action_parser actions[] = {
{ "arg", parse_argument_spec, TRIGGER_FL_ARGUMENT, },
{ "fparg", parse_float_argument_spec, TRIGGER_FL_ARGUMENT, },
{ "retval", parse_retval_spec, TRIGGER_FL_RETVAL, },
{ "filter", parse_filter_action, TRIGGER_FL_FILTER, },
{ "notrace", parse_notrace_action, TRIGGER_FL_FILTER, },
{ "depth=", parse_depth_action, TRIGGER_FL_FILTER, },
{ "time=", parse_time_action, TRIGGER_FL_FILTER, },
{ "caller", parse_caller_action, TRIGGER_FL_FILTER, },
{ "trace", parse_trace_action, TRIGGER_FL_SIGNAL, },
{ "finish", parse_finish_action, TRIGGER_FL_SIGNAL, },
{ "read=", parse_read_action, },
{ "color=", parse_color_action, },
{ "backtrace", parse_backtrace_action, },
{ "recover", parse_recover_action, },
{ "auto-args", parse_auto_args_action, },
};
int setup_trigger_action(char *str, struct uftrace_trigger *tr,
char **module, unsigned long orig_flags,
struct uftrace_filter_setting *setting)
{
char *pos = strchr(str, '@');
struct strv acts = STRV_INIT;
int ret = -1;
size_t i;
int j;
if (pos == NULL)
return 0;
*pos++ = '\0';
strv_split(&acts, pos, ",");
strv_for_each(&acts, pos, j) {
for (i = 0; i < ARRAY_SIZE(actions); i++) {
const struct trigger_action_parser *action = &actions[i];
if (strncasecmp(pos, action->name, strlen(action->name)))
continue;
if (orig_flags && !(orig_flags & action->flags))
break; /* ignore incompatible actions */
if (action->parse(pos, tr, setting) < 0)
goto out;
break;
}
/* if it's not an action, treat it as a module name */
if (i == ARRAY_SIZE(actions)) {
if (*module)
pr_use("ignoring extra module: %s\n", pos);
else
*module = xstrdup(pos);
}
}
ret = 0;
out:
strv_free(&acts);
return ret;
}
static int add_trigger_entry(struct rb_root *root, struct symtab *symtab,
struct uftrace_pattern *patt,
struct uftrace_trigger *tr,
struct debug_info *dinfo,
struct uftrace_filter_setting *setting)
{
struct uftrace_filter filter;
struct sym *sym;
unsigned i;
int ret = 0;
for (i = 0; i < symtab->nr_sym; i++) {
sym = &symtab->sym[i];
if (!match_filter_pattern(patt, sym->name))
continue;
filter.name = sym->name;
filter.start = sym->addr;
filter.end = sym->addr + sym->size;
ret += add_filter(root, &filter, tr,
patt->type == PATT_SIMPLE, dinfo, setting);
}
return ret;
}
static void setup_trigger(char *filter_str, struct symtabs *symtabs,
struct rb_root *root, unsigned long flags,
enum filter_mode *fmode,
struct uftrace_filter_setting *setting)
{
struct strv filters = STRV_INIT;
char *name;
int j;
if (filter_str == NULL)
return;
strv_split(&filters, filter_str, ";");
strv_for_each(&filters, name, j) {
LIST_HEAD(args);
struct uftrace_trigger tr = {
.flags = flags,
.pargs = &args,
};
int ret = 0;
char *module = NULL;
struct uftrace_arg_spec *arg;
struct uftrace_mmap *map;
struct uftrace_pattern patt = {
.type = PATT_NONE,
};
if (setup_trigger_action(name, &tr, &module, flags, setting) < 0)
goto next;
/* skip unintended kernel symbols */
if (module && has_kernel_opt(module) &&
!setting->allow_kernel)
goto next;
if (flags & TRIGGER_FL_FILTER) {
if (name[0] == '!') {
tr.fmode = FILTER_MODE_OUT;
name++;
}
else
tr.fmode = FILTER_MODE_IN;
}
/* use demangled name for triggers (some auto-args need it) */
name = demangle(name);
init_filter_pattern(setting->ptype, &patt, name);
free(name);
if (module) {
/* is it the main executable? */
if (!strncmp(module, basename(symtabs->filename),
strlen(module))) {
ret += add_trigger_entry(root, &symtabs->symtab,
&patt, &tr,
&symtabs->dinfo,
setting);
ret += add_trigger_entry(root, &symtabs->dsymtab,
&patt, &tr,
&symtabs->dinfo,
setting);
}
else if (!strcasecmp(module, "PLT")) {
ret = add_trigger_entry(root, &symtabs->dsymtab,
&patt, &tr,
&symtabs->dinfo,
setting);
}
else if (has_kernel_opt(module)) {