1 // SPDX-License-Identifier: GPL-2.0-only
11 #include "trace-event.h"
13 #include <linux/ctype.h>
14 #include <linux/kernel.h>
15 #include <event-parse.h>
17 static int get_common_field(struct scripting_context *context,
18 int *offset, int *size, const char *type)
20 struct tep_handle *pevent = context->pevent;
21 struct tep_event *event;
22 struct tep_format_field *field;
26 event = tep_get_first_event(pevent);
30 field = tep_find_common_field(event, type);
33 *offset = field->offset;
37 return tep_read_number(pevent, context->event_data + *offset, *size);
40 int common_lock_depth(struct scripting_context *context)
46 ret = get_common_field(context, &size, &offset,
54 int common_flags(struct scripting_context *context)
60 ret = get_common_field(context, &size, &offset,
68 int common_pc(struct scripting_context *context)
74 ret = get_common_field(context, &size, &offset,
75 "common_preempt_count");
83 raw_field_value(struct tep_event *event, const char *name, void *data)
85 struct tep_format_field *field;
86 unsigned long long val;
88 field = tep_find_any_field(event, name);
92 tep_read_number_field(field, data, &val);
97 unsigned long long read_size(struct tep_event *event, void *ptr, int size)
99 return tep_read_number(event->tep, ptr, size);
102 void event_format__fprintf(struct tep_event *event,
103 int cpu, void *data, int size, FILE *fp)
105 struct tep_record record;
108 memset(&record, 0, sizeof(record));
114 tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
115 trace_seq_do_fprintf(&s, fp);
116 trace_seq_destroy(&s);
120 * prev_state is of size long, which is 32 bits on 32 bit architectures.
121 * As it needs to have the same bits for both 32 bit and 64 bit architectures
122 * we can just assume that the flags we care about will all be within
125 #define MAX_STATE_BITS 32
127 static const char *convert_sym(struct tep_print_flag_sym *sym)
129 static char save_states[MAX_STATE_BITS + 1];
131 memset(save_states, 0, sizeof(save_states));
133 /* This is the flags for the prev_state_field, now make them into a string */
134 for (; sym; sym = sym->next) {
135 long bitmask = strtoul(sym->value, NULL, 0);
138 for (i = 0; !(bitmask & 1); i++)
141 if (i >= MAX_STATE_BITS)
144 save_states[i] = sym->str[0];
150 static struct tep_print_arg_field *
151 find_arg_field(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
153 struct tep_print_arg_field *field;
158 if (arg->type == TEP_PRINT_FIELD)
161 if (arg->type == TEP_PRINT_OP) {
162 field = find_arg_field(prev_state_field, arg->op.left);
163 if (field && field->field == prev_state_field)
165 field = find_arg_field(prev_state_field, arg->op.right);
166 if (field && field->field == prev_state_field)
172 static struct tep_print_flag_sym *
173 test_flags(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
175 struct tep_print_arg_field *field;
177 field = find_arg_field(prev_state_field, arg->flags.field);
181 return arg->flags.flags;
184 static struct tep_print_flag_sym *
185 search_op(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
187 struct tep_print_flag_sym *sym = NULL;
192 if (arg->type == TEP_PRINT_OP) {
193 sym = search_op(prev_state_field, arg->op.left);
197 sym = search_op(prev_state_field, arg->op.right);
200 } else if (arg->type == TEP_PRINT_FLAGS) {
201 sym = test_flags(prev_state_field, arg);
207 const char *parse_task_states(struct tep_format_field *state_field)
209 struct tep_print_flag_sym *sym;
210 struct tep_print_arg *arg;
211 struct tep_event *event;
213 event = state_field->event;
216 * Look at the event format fields, and search for where
217 * the prev_state is parsed via the format flags.
219 for (arg = event->print_fmt.args; arg; arg = arg->next) {
221 * Currently, the __print_flags() for the prev_state
222 * is embedded in operations, so they too must be
225 sym = search_op(state_field, arg);
227 return convert_sym(sym);
232 void parse_ftrace_printk(struct tep_handle *pevent,
233 char *file, unsigned int size __maybe_unused)
235 unsigned long long addr;
242 line = strtok_r(file, "\n", &next);
244 addr_str = strtok_r(line, ":", &fmt);
246 pr_warning("printk format with empty entry");
249 addr = strtoull(addr_str, NULL, 16);
250 /* fmt still has a space, skip it */
251 printk = strdup(fmt+1);
252 line = strtok_r(NULL, "\n", &next);
253 tep_register_print_string(pevent, printk, addr);
258 void parse_saved_cmdline(struct tep_handle *pevent,
259 char *file, unsigned int size __maybe_unused)
261 char comm[17]; /* Max comm length in the kernel is 16. */
266 line = strtok_r(file, "\n", &next);
268 if (sscanf(line, "%d %16s", &pid, comm) == 2)
269 tep_register_comm(pevent, comm, pid);
270 line = strtok_r(NULL, "\n", &next);
274 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
276 return tep_parse_event(pevent, buf, size, "ftrace");
279 int parse_event_file(struct tep_handle *pevent,
280 char *buf, unsigned long size, char *sys)
282 return tep_parse_event(pevent, buf, size, sys);
287 unsigned long long value;
290 static const struct flag flags[] = {
292 { "TIMER_SOFTIRQ", 1 },
293 { "NET_TX_SOFTIRQ", 2 },
294 { "NET_RX_SOFTIRQ", 3 },
295 { "BLOCK_SOFTIRQ", 4 },
296 { "IRQ_POLL_SOFTIRQ", 5 },
297 { "TASKLET_SOFTIRQ", 6 },
298 { "SCHED_SOFTIRQ", 7 },
299 { "HRTIMER_SOFTIRQ", 8 },
300 { "RCU_SOFTIRQ", 9 },
302 { "HRTIMER_NORESTART", 0 },
303 { "HRTIMER_RESTART", 1 },
306 unsigned long long eval_flag(const char *flag)
311 * Some flags in the format files do not get converted.
312 * If the flag is not numeric, see if it is something that
313 * we already know about.
315 if (isdigit(flag[0]))
316 return strtoull(flag, NULL, 0);
318 for (i = 0; i < (int)(ARRAY_SIZE(flags)); i++)
319 if (strcmp(flags[i].name, flag) == 0)
320 return flags[i].value;