Esempio n. 1
0
static int parse_events_add_kprobe(char *event)
{
	char *symbol, *end;
	struct probe_cb_base base;
	int fd, ret;

	fd = open(KPROBE_EVENTS_PATH, O_WRONLY);
	if (fd < 0) {
		fprintf(stderr, "Cannot open %s\n", KPROBE_EVENTS_PATH);
		return -1;
	}

	end = strpbrk(event, "% ");
	if (end)
		symbol = strndup(event, end - event);
	else
		symbol = strdup(event);

	base.fd = fd;
	base.ret_probe = !!strstr(event, "%return");
	base.symbol = symbol;
	base.fetch_args = strchr(event, ' ');

	init_kprobe_prohibited_area();

	ret = kallsyms_parse(&base, kprobe_symbol_actor);
	if (ret < 0)
		fprintf(stderr, "cannot parse symbol \"%s\"\n", symbol);

	free(symbol);
	close(fd);

	return ret;
}
Esempio n. 2
0
File: util.c Progetto: idkwim/ktap
unsigned long find_kernel_symbol(const char *symbol)
{
	int ret;
	struct ksym_addr_t arg = {
		.name = symbol,
		.addr = 0
	};

	ret = kallsyms_parse(&arg, symbol_cmp);
	if (ret < 0 || arg.addr == 0) {
		fprintf(stderr, "cannot read kernel symbol \"%s\" in %s\n",
			symbol, KALLSYMS_PATH);
		exit(EXIT_FAILURE);
	}

	return arg.addr;
}
Esempio n. 3
0
unsigned long find_kernel_symbol(const char *symbol)
{
	int ret;
	struct ksym_addr_t arg = {
		.name = symbol,
		.addr = 0
	};

	ret = kallsyms_parse(&arg, symbol_cmp);
	if (ret < 0 || arg.addr == 0) {
		fprintf(stderr, "cannot read kernel symbol \"%s\" in %s\n",
			symbol, KALLSYMS_PATH);
		exit(EXIT_FAILURE);
	}

	return arg.addr;
}


#define AVAILABLE_EVENTS_PATH "/sys/kernel/debug/tracing/available_events"

void list_available_events(const char *match)
{
	FILE *file;
	char *line = NULL;

	file = fopen(AVAILABLE_EVENTS_PATH, "r");
	if (file == NULL)
		handle_error("open " AVAILABLE_EVENTS_PATH " failed");

	while (!feof(file)) {
		int line_len;
		size_t n;

		line_len = getline(&line, &n, file);
		if (line_len < 0 || !line)
			break;

		if (!match || strglobmatch(line, match))
			printf("%s", line);
	}

	free(line);
	fclose(file);
}