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tep.c
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tep.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <linux/time64.h>
#include <api/fs/tracing_path.h>
#include <monitor.h>
#include <tep.h>
#include <stack_helpers.h>
#include <api/fs/fs.h>
#include <trace_helpers.h>
#define PLUGINS_DIR "/usr/lib64/perf-prof-traceevent/plugins"
static struct tep_handle *tep = NULL;
static struct tep_plugin_list *plugins = NULL;
static int global_comm = 0;
static int kprobe_type = 0;
static int uprobe_type = 0;
static char *kprobe_retprobe = NULL;
static char *uprobe_retprobe = NULL;
/* Reserved field names, taken from kernel/trace/trace_probe.h */
#define FIELD_STRING_IP "__probe_ip"
#define FIELD_STRING_RETIP "__probe_ret_ip"
#define FIELD_STRING_FUNC "__probe_func"
__ctor
static void __kprobe_uprobe(void)
{
size_t unused;
sysfs__read_int("bus/event_source/devices/kprobe/type", &kprobe_type);
sysfs__read_int("bus/event_source/devices/uprobe/type", &uprobe_type);
if (sysfs__read_str("bus/event_source/devices/kprobe/format/retprobe", &kprobe_retprobe, &unused) < 0)
kprobe_type = 0;
if (sysfs__read_str("bus/event_source/devices/uprobe/format/retprobe", &uprobe_retprobe, &unused) < 0)
uprobe_type = 0;
}
void pr_stat(const char *fmt, ...)
{
/* Disable libtraceevent printing.
*
* registering plugin:
* overriding event
* removing override handler for event
*/
}
struct tep_handle *tep__ref(void)
{
if (tep != NULL) {
tep_ref(tep);
return tep;
}
tep = tep_alloc();
tep_add_plugin_path(tep, (char *)PLUGINS_DIR, TEP_PLUGIN_FIRST);
plugins = tep_load_plugins(tep);
function_resolver_ref();
tep_set_function_resolver(tep, function_resolver, NULL);
if (global_comm_ref() == 0)
global_comm = 1;
return tep;
}
void tep__unref(void)
{
if (tep == NULL)
return;
if (tep_get_ref(tep) == 1) {
if (global_comm) {
global_comm_unref();
global_comm = 0;
}
tep_reset_function_resolver(tep);
function_resolver_unref();
tep_unload_plugins(plugins, tep);
tep_free(tep);
tep = NULL;
} else
tep_unref(tep);
}
int tep__event_id(const char *sys, const char *name)
{
char format[256];
struct stat st;
struct tep_event *event;
int id = -1;
tep__ref();
event = tep_find_event_by_name(tep, sys, name);
if (event) {
id = event->id;
goto unref;
}
snprintf(format, sizeof(format), "%s/events/%s/%s/format", tracing_path_mount(), sys, name);
if (stat(format, &st) == 0) {
FILE *fp;
size_t size = 65536;
char *buff = malloc(size);
fp = fopen(format, "r");
size = fread(buff, 1, size, fp);
fclose(fp);
tep_parse_format(tep, &event, buff, size, sys);
free(buff);
id = event->id;
}
unref:
tep__unref();
return id;
}
void tep__update_comm(const char *comm, int pid)
{
char buff[16];
if (global_comm)
return;
if (comm == NULL) {
char path[64];
int fd, len;
snprintf(path, sizeof(path), "/proc/%d/comm", pid);
fd = open(path, O_RDONLY);
if (fd < 0)
return;
len = (int)read(fd, buff, sizeof(buff));
close(fd);
if (len <= 0)
return;
len--;
if (buff[len] == '\n' || len == sizeof(buff)-1)
buff[len] = '\0';
comm = buff;
}
tep__ref();
tep_override_comm(tep, comm, pid);
tep__unref();
}
const char *tep__pid_to_comm(int pid)
{
const char *comm;
if (global_comm) {
comm = global_comm_get(pid);
return comm ? comm : "<...>";
}
tep__ref();
comm = tep_data_comm_from_pid(tep, pid);
tep__unref();
return comm;
}
void tep__print_event(unsigned long long ts, int cpu, void *data, int size)
{
struct tep_record record;
struct trace_seq s;
struct tep_event *e;
ts = (ts + 500) / 1000; // us
memset(&record, 0, sizeof(record));
record.ts = ts;
record.cpu = cpu;
record.size = size;
record.data = data;
tep__ref();
// For KPROBE, common_type = 0, e = NULL.
e = tep_find_event_by_record(tep, &record);
trace_seq_init(&s);
if (global_comm) {
int pid = tep_data_pid(tep, &record);
char *comm = global_comm_get(pid);
trace_seq_printf(&s, "%16s %6u ", comm ? : "<...>", pid);
tep_print_event(tep, &s, &record, "%s", TEP_PRINT_LATENCY);
if (likely(cpu >= 0))
trace_seq_printf(&s, " [%03d] %llu.%06llu: %s:%s: ", cpu, ts/USEC_PER_SEC, ts%USEC_PER_SEC,
e ? e->system : "NULL", e ? e->name : "NULL");
else
trace_seq_printf(&s, " [---] %llu.%06llu: %s:%s: ", ts/USEC_PER_SEC, ts%USEC_PER_SEC,
e ? e->system : "NULL", e ? e->name : "NULL");
} else {
if (likely(cpu >= 0))
tep_print_event(tep, &s, &record, "%16s %6u %s [%03d] %6d: ", TEP_PRINT_COMM, TEP_PRINT_PID,
TEP_PRINT_LATENCY, TEP_PRINT_CPU, TEP_PRINT_TIME);
else
tep_print_event(tep, &s, &record, "%16s %6u %s [---] %6d: ", TEP_PRINT_COMM, TEP_PRINT_PID,
TEP_PRINT_LATENCY, TEP_PRINT_TIME);
trace_seq_printf(&s, "%s:%s: ", e ? e->system : "NULL", e ? e->name : "NULL");
}
if (e)
tep_print_event(tep, &s, &record, "%s\n", TEP_PRINT_INFO);
else
trace_seq_printf(&s, "\n");
tep__unref();
trace_seq_do_fprintf(&s, stdout);
trace_seq_destroy(&s);
}
bool tep__event_has_field(int id, const char *field)
{
bool has_field = false;
struct tep_event *event;
tep__ref();
event = tep_find_event(tep, id);
if (event) {
has_field = !!tep_find_any_field(event, field);
}
tep__unref();
return has_field;
}
bool tep__event_field_size(int id, const char *field)
{
struct tep_event *event;
struct tep_format_field *format;
int size = -1;
tep__ref();
event = tep_find_event(tep, id);
if (event) {
format = tep_find_any_field(event, field);
if (format)
size = format->size;
}
tep__unref();
return size;
}
int tep__event_size(int id)
{
struct tep_event *event;
struct tep_format_field **fields;
int size = -1;
tep__ref();
event = tep_find_event(tep, id);
if (event) {
fields = tep_event_fields(event);
if (fields) {
int i = 0;
while (fields[i]) {
if (fields[i]->offset + fields[i]->size > size)
size = fields[i]->offset + fields[i]->size;
i++;
}
free(fields);
}
}
tep__unref();
return size;
}
static event_fields *kprobe_uprobe_event_fields(int id)
{
event_fields *ef = NULL;
int nr_fields = 0;
struct trace_entry entry;
int offset = 0;
if (id == KPROBE || id == UPROBE)
nr_fields = 5;
else if (id == KRETPROBE || id == URETPROBE)
nr_fields = 6;
else
return NULL;
ef = calloc(1, (nr_fields+1) * sizeof(*ef));
if (!ef) return NULL;
#define EF(i, _name, _size) \
ef[i].name = _name; \
ef[i].offset = offset; \
ef[i].size = ef[i].elementsize = _size; \
offset += _size;
EF(0, "common_type", sizeof(entry.common_type));
EF(1, "common_flags", sizeof(entry.common_flags));
EF(2, "common_preempt_count", sizeof(entry.common_preempt_count));
EF(3, "common_pid", sizeof(entry.common_pid));
if (id == KPROBE || id == UPROBE) {
EF(4, FIELD_STRING_IP, sizeof(unsigned long));
} else if (id == KRETPROBE || id == URETPROBE) {
EF(4, FIELD_STRING_FUNC, sizeof(unsigned long));
EF(5, FIELD_STRING_RETIP, sizeof(unsigned long));
}
return ef;
}
event_fields *tep__event_fields(int id)
{
struct tep_event *event;
struct tep_format_field **common_fields;
struct tep_format_field **fields;
int nr_common = 0, nr_fields = 0, nr_dynamic = 0;
int extra_len = 0;
event_fields *ef = NULL;
char *extra = NULL;
int i = 0, f = 0;
if (id > TRACE_EVENT_TYPE_MAX)
return kprobe_uprobe_event_fields(id);
tep__ref();
event = tep_find_event(tep, id);
if (!event)
goto _return;
common_fields = tep_event_common_fields(event);
fields = tep_event_fields(event);
if (!common_fields || !fields)
goto _return;
while (common_fields[nr_common]) nr_common++;
while (fields[nr_fields]) {
if (fields[nr_fields]->flags & TEP_FIELD_IS_DYNAMIC) {
nr_dynamic++;
extra_len += 2*strlen(fields[nr_fields]->name) + sizeof("_offset") + sizeof("_len");
}
nr_fields++;
}
ef = calloc(1, (nr_common + nr_fields + nr_dynamic + 1) * sizeof(*ef) + extra_len);
if (!ef)
goto _free;
extra = (char *)ef + (nr_common + nr_fields + nr_dynamic + 1) * sizeof(*ef);
f = 0;
while (common_fields[f]) {
ef[i].name = common_fields[f]->name;
ef[i].offset = common_fields[f]->offset;
ef[i].size = common_fields[f]->size;
ef[i].elementsize = common_fields[f]->elementsize;
i++;
f++;
}
f = 0;
while (fields[f]) {
if (fields[f]->flags & TEP_FIELD_IS_DYNAMIC) {
ef[i].name = extra;
extra += sprintf((char *)ef[i].name, "%s_offset", fields[f]->name)+1;
ef[i].offset = fields[f]->offset;
ef[i].size = 2;
ef[i].elementsize = 2;
i++;
ef[i].name = extra;
extra += sprintf((char *)ef[i].name, "%s_len", fields[f]->name)+1;
ef[i].offset = fields[f]->offset + 2;
ef[i].size = 2;
ef[i].elementsize = 2;
} else {
ef[i].name = fields[f]->name;
ef[i].offset = fields[f]->offset;
ef[i].size = fields[f]->size;
ef[i].elementsize = fields[f]->elementsize;
}
i++;
f++;
}
ef[i].name = NULL;
_free:
if (common_fields) free(common_fields);
if (fields) free(fields);
_return:
tep__unref();
return ef;
}
static char *next_sep(char *s, int c)
{
while (*s) {
if (*s == (char)c)
return (char *)s;
if (*s == '\'' || *s == '"') {
int quote = *s++;
while (*s && *s++ != quote);
} else
s++;
}
return NULL;
}
static char *rm_quotes(char *s, char fill)
{
// Remove single and double quotes around `s'
if (s && (s[0] == '\'' || s[0] == '"')) {
int len = strlen(s);
if (s[len-1] == s[0]) {
s[len-1] = fill;
s[0] = fill;
return s+1;
}
}
return s;
}
static int tp_kprobe_uprobe(struct tp *tp, char *sys, char *name)
{
int id = -1;
char *path;
char resolved_path[PATH_MAX];
// kprobe:func
// kretprobe:func
// uprobe:"func@path" | uprobe:func@"path"
// uretprobe:"func@path" | uretprobe:func@"path"
if (strcmp(sys, "kprobe") == 0) {
id = kprobe_type ? KPROBE : -1;
tp->kprobe_func = name;
} else if (strcmp(sys, "kretprobe") == 0) {
id = kprobe_type ? KRETPROBE : -1;
tp->kprobe_func = name;
} else if (strcmp(sys, "uprobe") == 0) {
id = uprobe_type ? UPROBE : -1;
goto uprobe;
} else if (strcmp(sys, "uretprobe") == 0) {
id = uprobe_type ? URETPROBE : -1;
uprobe:
tp->uprobe_path = NULL;
tp->uprobe_offset = 0;
path = strchr(name, '@');
if (path) {
*path++ = '\0';
path = rm_quotes(path, '\0');
if (id > 0 &&
realpath(path, resolved_path) &&
access(resolved_path, X_OK) == 0) {
tp->uprobe_path = path;
tp->uprobe_offset = syms__file_offset(resolved_path, name);
}
}
if (!tp->uprobe_offset)
id = -1;
}
return id;
}
struct tp_list *tp_list_new(struct prof_dev *dev, char *event_str)
{
char *s = event_str;
char *sep;
int i;
int nr_tp = 0;
struct tp_list *tp_list = NULL;
if (!s)
return NULL;
while ((sep = next_sep(s, ',')) != NULL) {
nr_tp ++;
s = sep + 1;
}
if (*s)
nr_tp ++;
if (nr_tp == 0)
return NULL;
tp_list = calloc(1, sizeof(struct tp_list) + nr_tp * sizeof(struct tp));
if (!tp_list)
return NULL;
tp_list->event_str = strdup(event_str);
if (!tp_list->event_str) {
free(tp_list);
return NULL;
}
tp_list->nr_tp = nr_tp;
s = tp_list->event_str;
i = 0;
while ((sep = next_sep(s, ',')) != NULL) {
tp_list->tp[i++].name = s;
*sep = '\0';
s = sep + 1;
}
if (*s)
tp_list->tp[i++].name = s;
tep__ref();
/*
* Event syntax:
* EVENT,EVENT,...
* EVENT:
* sys:name[/filter/ATTR/ATTR/.../]
* profiler[/option/ATTR/ATTR/.../]
* ATTR:
* stack : sample_type PERF_SAMPLE_CALLCHAIN
* max-stack=int : sample_max_stack
* top-by=field : top add and sort by this field
* top-add=field: top add this field
* ...
**/
for (i = 0; i < nr_tp; i++) {
struct tp *tp = &tp_list->tp[i];
struct tep_event *event = NULL;
char *slash = NULL;
char *sys = NULL;
char *name = NULL;
char *filter = NULL;
int stack = 0;
int max_stack = 0;
bool top_by;
char *alias = NULL;
int id = -1;
event_fields *fields = NULL;
struct expr_prog *prog = NULL;
profiler *prof = NULL;
struct env *env = NULL;
tp->dev = dev;
s = tp->name;
slash = next_sep(s, '/');
if (slash) {
*slash = '\0';
filter = slash + 1;
slash = next_sep(filter, '/');
if (!slash)
goto err_out;
*slash = '\0';
}
sys = s = tp->name;
sep = strchr(s, ':');
if (!sep) { // profiler/option/
prof = monitor_find(sys);
if (!prof) {
fprintf(stderr, "profiler %s not found\n", sys);
goto err_out;
}
if (filter && filter[0])
filter[-1] = ' ';
rm_quotes(filter, ' ');
env = parse_string_options(s);
if (!env)
goto err_out;
// --tsc, --kvmclock remains the same.
env->tsc = dev->env->tsc;
env->clock_offset = dev->env->clock_offset;
if (env->kvmclock) free(env->kvmclock);
env->kvmclock = dev->env->kvmclock ? strdup(dev->env->kvmclock) : NULL;
// Using (dev->cpus, dev->threads).
// Make sure instance is consistent between source_dev and dev.
tp->source_dev = prof_dev_open_cpu_thread_map(prof, env, dev->cpus, dev->threads, dev);
if (!tp->source_dev)
goto err_out;
name = sys;
sys = NULL;
} else { // sys:name/filter/
*sep = '\0';
name = sep + 1;
name = rm_quotes(name, '\0');
id = tep__event_id(sys, name);
if (id < 0) {
id = tp_kprobe_uprobe(tp, sys, name);
if (id < 0) {
fprintf(stderr, "%s:%s not found\n", sys, name);
goto err_out;
}
} else {
event = tep_find_event_by_name(tep, sys, name);
if (!event)
goto err_out;
}
// Remove single and double quotes around filter
filter = rm_quotes(filter, '\0');
}
// ATTR
if (slash) {
*slash = '\0';
s = slash + 1;
while ((sep = next_sep(s, '/')) != NULL) {
char *attr = s;
char *value = NULL;
*sep = '\0';
s = sep + 1;
if ((sep = next_sep(attr, '=')) != NULL) {
*sep = '\0';
value = sep + 1;
}
// Remove single and double quotes around value
value = rm_quotes(value, '\0');
top_by = false;
prog = NULL;
if (strcmp(attr, "stack") == 0)
stack = 1;
else if (strcmp(attr, "max-stack") == 0) {
stack = 1;
max_stack = value ? atoi(value) : 0;
if (max_stack > PERF_MAX_STACK_DEPTH)
max_stack = PERF_MAX_STACK_DEPTH;
} else if (strcmp(attr, "top-by") == 0 ||
strcmp(attr, "top_by") == 0) {
top_by = true;
goto top_add;
} else if (strcmp(attr, "top-add") == 0 ||
strcmp(attr, "top_add") == 0) {
top_add:
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->nr_top ++;
tp->top_add = realloc(tp->top_add, tp->nr_top * sizeof(*tp->top_add));
tp->top_add[tp->nr_top-1].field_prog = prog;
tp->top_add[tp->nr_top-1].field = value;
tp->top_add[tp->nr_top-1].event = false;
tp->top_add[tp->nr_top-1].top_by = top_by;
} else if (strcmp(attr, "comm") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->comm_prog = prog;
tp->comm = value;
} else if (strcmp(attr, "alias") == 0) {
alias = value;
} else if (strcmp(attr, "ptr") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->mem_ptr_prog = prog;
tp->mem_ptr = value;
} else if (strcmp(attr, "size") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->mem_size_prog = prog;
tp->mem_size = value;
} else if (strcmp(attr, "num") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->num_prog = prog;
tp->num = value;
} else if (strcmp(attr, "key") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->key_prog = prog;
tp->key = value;
} else if (strcmp(attr, "role") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->role_prog = prog;
tp->role = value;
} else if (strcmp(attr, "untraced") == 0) {
tp->untraced = true;
} else if (strcmp(attr, "trigger") == 0) {
tp->trigger = true;
} else if (strcmp(attr, "push") == 0) {
if (id >= 0 && tp_broadcast_new(tp, value) < 0) goto err_out;
} else if (strcmp(attr, "pull") == 0) {
if (id >= 0 && tp_receive_new(tp, value) < 0) goto err_out;
} else if (strcmp(attr, "vm") == 0) {
tp->vcpu = vcpu_info_get(value);
if (tp->vcpu)
tp->vm = value;
} else if (strcmp(attr, "exec") == 0) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile(value, fields);
if (!prog) { free(fields); goto err_out; }
tp->exec_prog = prog;
tp->exec = value;
} else if (strcmp(attr, "cpus") == 0) {
tp->cpus = perf_cpu_map__new(value);
tp->cpus = perf_cpu_map__and(tp->cpus, dev->cpus);
if (perf_cpu_map__nr(tp->cpus) == 0) {
perf_cpu_map__put(tp->cpus);
tp->cpus = NULL;
}
}
}
}
tp->id = id;
tp->sys = sys;
tp->name = name;
tp->filter = (filter && filter[0]) ? strdup(filter) : NULL;
tp->stack = stack;
tp->max_stack = max_stack;
tp->alias = alias;
tp->kernel = !tp->receive;
tp->matcher = tp_matcher_find(tp, sys, name);
if (tp->nr_top == 0) {
tp->nr_top = 1;
tp->top_add = realloc(tp->top_add, tp->nr_top * sizeof(*tp->top_add));
tp->top_add[0].field_prog = NULL;
tp->top_add[0].field = alias ? : name;
tp->top_add[0].event = true;
tp->top_add[0].top_by = false;
}
if (!tp->mem_ptr && event && tep_find_any_field(event, "ptr")) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile((char *)"ptr", fields);
if (!prog) { free(fields); goto err_out; }
tp->mem_ptr_prog = prog;
tp->mem_ptr = "ptr";
}
if (!tp->mem_size && event && tep_find_any_field(event, "bytes_alloc")) {
if (!fields) fields = tep__event_fields(id);
if (fields) prog = expr_compile((char *)"bytes_alloc", fields);
if (!prog) { free(fields); goto err_out; }
tp->mem_size_prog = prog;
tp->mem_size = "bytes_alloc";
}
tp_list->nr_real_tp += id >= 0;
tp_list->nr_need_stack += stack;
tp_list->nr_top += tp->nr_top;
tp_list->nr_comm += !!tp->comm_prog;
tp_list->nr_mem_size += !!tp->mem_size_prog;
tp_list->nr_num_prog += !!tp->num_prog;
tp_list->nr_untraced += !!tp->untraced;
tp_list->nr_push_to += !!tp->broadcast;
tp_list->nr_pull_from += !!tp->receive;
tp_list->nr_exec_prog += !!tp->exec_prog;
if (fields)
free(fields);
}
tp_list->need_stream_id = (tp_list->nr_need_stack && tp_list->nr_need_stack != tp_list->nr_real_tp);
tep__unref();
return tp_list;
err_out:
tep__unref();
tp_list_free(tp_list);
return NULL;
}
void tp_list_free(struct tp_list *tp_list)
{
int i, j;
if (!tp_list)
return ;
for (i = 0; i < tp_list->nr_tp; i++) {
struct tp *tp = &tp_list->tp[i];
// Closed within prof_dev_close().
//if (tp_is_dev(tp) && tp->source_dev)
// prof_dev_close(tp->source_dev);
if (tp->filter)
free(tp->filter);
if (tp->ftrace_filter)
expr_destroy(tp->ftrace_filter);
for (j = 0; j < tp->nr_top; j++) {
if (tp->top_add[j].field_prog)
expr_destroy(tp->top_add[j].field_prog);
}
if (tp->top_add)
free(tp->top_add);
if (tp->comm_prog)
expr_destroy(tp->comm_prog);
if (tp->mem_ptr_prog)
expr_destroy(tp->mem_ptr_prog);
if (tp->mem_size_prog)
expr_destroy(tp->mem_size_prog);
if (tp->num_prog)
expr_destroy(tp->num_prog);
if (tp->key_prog)
expr_destroy(tp->key_prog);
if (tp->role_prog)
expr_destroy(tp->role_prog);
tp_broadcast_free(tp);
tp_receive_free(tp);
if (tp->vcpu)
vcpu_info_put(tp->vcpu);
if (tp->exec_prog)
expr_destroy(tp->exec_prog);
if (tp->cpus) {
if (!tp_is_dev(tp) && tp->evsel)
perf_evsel__set_own_cpus(tp->evsel, NULL);
perf_cpu_map__put(tp->cpus);
}
if (tp->tp_cpu_prog)
expr_destroy(tp->tp_cpu_prog);
if (tp->tp_pid_prog)
expr_destroy(tp->tp_pid_prog);
}
free(tp_list->event_str);
free(tp_list);
}
void tp_update_filter(struct tp *tp, const char *filter)
{
if (tp->filter)
free(tp->filter);
tp->filter = strdup(filter);
}
void tp_print_marker(struct tp *tp)
{
printf("%c ", (!tp || tp_kernel(tp)) ? ' ' : 'G');
}
struct expr_prog *tp_new_prog(struct tp *tp, char *expr_str)
{
event_fields *fields = tep__event_fields(tp->id);
struct expr_prog *prog = NULL;
if (fields) {
prog = expr_compile(expr_str, fields);
free(fields);
}
return prog;
}
long tp_prog_run(struct tp *tp, struct expr_prog *prog, void *data, int size)
{
if (expr_load_data(prog, data, size) != 0) {
expr_dump(prog);
fprintf(stderr, "tp %s:%s prog load data failed!\n", tp->sys, tp->name);
return -1;
}
return expr_run(prog);
}
char *tp_get_comm(struct tp *tp, void *data, int size)
{
long comm = tp_prog_run(tp, tp->comm_prog, data, size);
return comm == -1 ? (char *)"Error" : (char *)(unsigned long)comm;
}
unsigned long tp_get_key(struct tp *tp, void *data, int size)
{
long key = tp_prog_run(tp, tp->key_prog, data, size);
return key == -1 ? 0 : (unsigned long)key;
}
unsigned long tp_get_role(struct tp *tp, void *data, int size)
{
long key = tp_prog_run(tp, tp->role_prog, data, size);
return key == -1 ? 0 : (unsigned long)key;
}
unsigned long tp_get_num(struct tp *tp, void *data, int size)
{
long num = tp_prog_run(tp, tp->num_prog, data, size);
return num == -1 ? 0 : (unsigned long)num;
}
void *tp_get_mem_ptr(struct tp *tp, void *data, int size)
{
long mem_ptr = tp_prog_run(tp, tp->mem_ptr_prog, data, size);
return mem_ptr == -1 ? NULL : (void *)mem_ptr;
}
unsigned long tp_get_mem_size(struct tp *tp, void *data, int size)
{
long mem_size = tp_prog_run(tp, tp->mem_size_prog, data, size);
return mem_size == -1 ? 1 : (unsigned long)mem_size;
}
/* taken from kernel/trace/trace_output.c */
static void trace_print_lat_fmt(struct trace_entry *entry)
{
unsigned char flags = entry->common_flags;
unsigned char preempt_count = entry->common_preempt_count;
char hardsoft_irq;
char need_resched;
char irqs_off;
int hardirq;
int softirq;
int bh_off;
int nmi;
nmi = flags & TRACE_FLAG_NMI;
hardirq = flags & TRACE_FLAG_HARDIRQ;
softirq = flags & TRACE_FLAG_SOFTIRQ;
bh_off = flags & TRACE_FLAG_BH_OFF;
irqs_off =
(flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' :
(flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
bh_off ? 'b' :
(flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
'.';
switch (flags & (TRACE_FLAG_NEED_RESCHED |
TRACE_FLAG_PREEMPT_RESCHED)) {
case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
need_resched = 'N';
break;
case TRACE_FLAG_NEED_RESCHED:
need_resched = 'n';
break;
case TRACE_FLAG_PREEMPT_RESCHED:
need_resched = 'p';
break;
default:
need_resched = '.';
break;
}
hardsoft_irq =
(nmi && hardirq) ? 'Z' :
nmi ? 'z' :
(hardirq && softirq) ? 'H' :
hardirq ? 'h' :
softirq ? 's' :
'.' ;
if (!preempt_count)
printf("%c%c%c.", irqs_off, need_resched, hardsoft_irq);
else {
printf("%c%c%c", irqs_off, need_resched, hardsoft_irq);
if (preempt_count & 0xf)
printf("%x", preempt_count & 0xf);
if (preempt_count & 0xf0)
printf("%x", preempt_count >> 4);
}
}
void tp_print_event(struct tp *tp, unsigned long long ts, int cpu, void *data, int size)
{
if (!tp)
tep__print_event(ts, cpu, data, size);
else {
struct trace_entry *entry = data;
int pid = entry->common_pid;
char *comm = global_comm_get(pid);
printf("%16s %6u ", comm ? : "<...>", pid);
trace_print_lat_fmt(entry);
if (likely(cpu >= 0))
printf(" [%03d]", cpu);
else printf(" [---]");
ts = (ts + 500) / 1000; // us
printf(" %llu.%06llu: %s:%s:%s", ts/USEC_PER_SEC, ts%USEC_PER_SEC,
tp->sys, tp->name, tp->id <= URETPROBE ? "" : "\n");
if (tp->id <= TRACE_EVENT_TYPE_MAX) {
struct tep_record record = {.size = size, .data = data};
struct tep_event *e = tep_find_event_by_record(tep__ref(), &record);
if (e) {
static struct trace_seq s;
static int inited = 0;
if (!inited) {
inited = 1;
trace_seq_init(&s);
} else
trace_seq_reset(&s);
tep_print_event(tep, &s, &record, " %s\n", TEP_PRINT_INFO);
trace_seq_do_fprintf(&s, stdout);
} else
printf("\n");
tep__unref();
} else {
if (tp->id == KPROBE) {
struct kprobe_trace_entry_head *field = data;
printf(" (0x%lx)\n", field->ip);
} else if (tp->id == KRETPROBE) {
struct kretprobe_trace_entry_head *field = data;
printf(" (0x%lx <- 0x%lx)\n", field->ret_ip, field->func);
} else if (tp->id == UPROBE) {
struct uprobe_trace_entry_head *field = data;
printf(" (0x%lx)\n", field->vaddr[0]);
} else if (tp->id == URETPROBE) {