34 #define TRACE_SEQ_CHECK(s)						\  argument
36 	if (WARN_ONCE((s)->buffer == TRACE_SEQ_POISON,			\
38 		(s)->state = TRACE_SEQ__BUFFER_POISONED;		\
41 #define TRACE_SEQ_CHECK_RET_N(s, n)		\  argument
43 	TRACE_SEQ_CHECK(s);			\
44 	if ((s)->state != TRACE_SEQ__GOOD)	\
48 #define TRACE_SEQ_CHECK_RET(s)   TRACE_SEQ_CHECK_RET_N(s, )  argument
49 #define TRACE_SEQ_CHECK_RET0(s)  TRACE_SEQ_CHECK_RET_N(s, 0)  argument
55 void trace_seq_init(struct trace_seq *s)  in trace_seq_init()  argument
57 	s->len = 0;  in trace_seq_init()
58 	s->readpos = 0;  in trace_seq_init()
59 	s->buffer_size = TRACE_SEQ_BUF_SIZE;  in trace_seq_init()
60 	s->buffer = malloc(s->buffer_size);  in trace_seq_init()
61 	if (s->buffer != NULL)  in trace_seq_init()
62 		s->state = TRACE_SEQ__GOOD;  in trace_seq_init()
64 		s->state = TRACE_SEQ__MEM_ALLOC_FAILED;  in trace_seq_init()
71 void trace_seq_reset(struct trace_seq *s)  in trace_seq_reset()  argument
73 	if (!s)  in trace_seq_reset()
75 	TRACE_SEQ_CHECK(s);  in trace_seq_reset()
76 	s->len = 0;  in trace_seq_reset()
77 	s->readpos = 0;  in trace_seq_reset()
86 void trace_seq_destroy(struct trace_seq *s)  in trace_seq_destroy()  argument
88 	if (!s)  in trace_seq_destroy()
90 	TRACE_SEQ_CHECK_RET(s);  in trace_seq_destroy()
91 	free(s->buffer);  in trace_seq_destroy()
92 	s->buffer = TRACE_SEQ_POISON;  in trace_seq_destroy()
95 static void expand_buffer(struct trace_seq *s)  in expand_buffer()  argument
99 	buf = realloc(s->buffer, s->buffer_size + TRACE_SEQ_BUF_SIZE);  in expand_buffer()
101 		s->state = TRACE_SEQ__MEM_ALLOC_FAILED;  in expand_buffer()
105 	s->buffer = buf;  in expand_buffer()
106 	s->buffer_size += TRACE_SEQ_BUF_SIZE;  in expand_buffer()
124 trace_seq_printf(struct trace_seq *s, const char *fmt, ...)  in trace_seq_printf()  argument
131 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_printf()
133 	len = (s->buffer_size - 1) - s->len;  in trace_seq_printf()
136 	ret = vsnprintf(s->buffer + s->len, len, fmt, ap);  in trace_seq_printf()
140 		expand_buffer(s);  in trace_seq_printf()
144 	s->len += ret;  in trace_seq_printf()
161 trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)  in trace_seq_vprintf()  argument
167 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_vprintf()
169 	len = (s->buffer_size - 1) - s->len;  in trace_seq_vprintf()
171 	ret = vsnprintf(s->buffer + s->len, len, fmt, args);  in trace_seq_vprintf()
174 		expand_buffer(s);  in trace_seq_vprintf()
178 	s->len += ret;  in trace_seq_vprintf()
193 int trace_seq_puts(struct trace_seq *s, const char *str)  in trace_seq_puts()  argument
197 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_puts()
201 	while (len > ((s->buffer_size - 1) - s->len))  in trace_seq_puts()
202 		expand_buffer(s);  in trace_seq_puts()
204 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_puts()
206 	memcpy(s->buffer + s->len, str, len);  in trace_seq_puts()
207 	s->len += len;  in trace_seq_puts()
212 int trace_seq_putc(struct trace_seq *s, unsigned char c)  in trace_seq_putc()  argument
214 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_putc()
216 	while (s->len >= (s->buffer_size - 1))  in trace_seq_putc()
217 		expand_buffer(s);  in trace_seq_putc()
219 	TRACE_SEQ_CHECK_RET0(s);  in trace_seq_putc()
221 	s->buffer[s->len++] = c;  in trace_seq_putc()
226 void trace_seq_terminate(struct trace_seq *s)  in trace_seq_terminate()  argument
228 	TRACE_SEQ_CHECK_RET(s);  in trace_seq_terminate()
231 	s->buffer[s->len] = 0;  in trace_seq_terminate()
234 int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp)  in trace_seq_do_fprintf()  argument
236 	TRACE_SEQ_CHECK(s);  in trace_seq_do_fprintf()
238 	switch (s->state) {  in trace_seq_do_fprintf()
240 		return fprintf(fp, "%.*s", s->len, s->buffer);  in trace_seq_do_fprintf()
251 int trace_seq_do_printf(struct trace_seq *s)  in trace_seq_do_printf()  argument
253 	return trace_seq_do_fprintf(s, stdout);  in trace_seq_do_printf()