diff options
Diffstat (limited to 'src/tools/lib/traceevent/trace-seq.c')
| -rw-r--r-- | src/tools/lib/traceevent/trace-seq.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/src/tools/lib/traceevent/trace-seq.c b/src/tools/lib/traceevent/trace-seq.c deleted file mode 100644 index d7f2e68..0000000 --- a/src/tools/lib/traceevent/trace-seq.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License (not later!) - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this program; if not, see <http://www.gnu.org/licenses> - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> - -#include "event-parse.h" -#include "event-utils.h" - -/* - * The TRACE_SEQ_POISON is to catch the use of using - * a trace_seq structure after it was destroyed. - */ -#define TRACE_SEQ_POISON ((void *)0xdeadbeef) -#define TRACE_SEQ_CHECK(s) \ -do { \ - if ((s)->buffer == TRACE_SEQ_POISON) \ - die("Usage of trace_seq after it was destroyed"); \ -} while (0) - -/** - * trace_seq_init - initialize the trace_seq structure - * @s: a pointer to the trace_seq structure to initialize - */ -void trace_seq_init(struct trace_seq *s) -{ - s->len = 0; - s->readpos = 0; - s->buffer_size = TRACE_SEQ_BUF_SIZE; - s->buffer = malloc_or_die(s->buffer_size); -} - -/** - * trace_seq_reset - re-initialize the trace_seq structure - * @s: a pointer to the trace_seq structure to reset - */ -void trace_seq_reset(struct trace_seq *s) -{ - if (!s) - return; - TRACE_SEQ_CHECK(s); - s->len = 0; - s->readpos = 0; -} - -/** - * trace_seq_destroy - free up memory of a trace_seq - * @s: a pointer to the trace_seq to free the buffer - * - * Only frees the buffer, not the trace_seq struct itself. - */ -void trace_seq_destroy(struct trace_seq *s) -{ - if (!s) - return; - TRACE_SEQ_CHECK(s); - free(s->buffer); - s->buffer = TRACE_SEQ_POISON; -} - -static void expand_buffer(struct trace_seq *s) -{ - s->buffer_size += TRACE_SEQ_BUF_SIZE; - s->buffer = realloc(s->buffer, s->buffer_size); - if (!s->buffer) - die("Can't allocate trace_seq buffer memory"); -} - -/** - * trace_seq_printf - sequence printing of trace information - * @s: trace sequence descriptor - * @fmt: printf format string - * - * It returns 0 if the trace oversizes the buffer's free - * space, 1 otherwise. - * - * The tracer may use either sequence operations or its own - * copy to user routines. To simplify formating of a trace - * trace_seq_printf is used to store strings into a special - * buffer (@s). Then the output may be either used by - * the sequencer or pulled into another buffer. - */ -int -trace_seq_printf(struct trace_seq *s, const char *fmt, ...) -{ - va_list ap; - int len; - int ret; - - TRACE_SEQ_CHECK(s); - - try_again: - len = (s->buffer_size - 1) - s->len; - - va_start(ap, fmt); - ret = vsnprintf(s->buffer + s->len, len, fmt, ap); - va_end(ap); - - if (ret >= len) { - expand_buffer(s); - goto try_again; - } - - s->len += ret; - - return 1; -} - -/** - * trace_seq_vprintf - sequence printing of trace information - * @s: trace sequence descriptor - * @fmt: printf format string - * - * The tracer may use either sequence operations or its own - * copy to user routines. To simplify formating of a trace - * trace_seq_printf is used to store strings into a special - * buffer (@s). Then the output may be either used by - * the sequencer or pulled into another buffer. - */ -int -trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) -{ - int len; - int ret; - - TRACE_SEQ_CHECK(s); - - try_again: - len = (s->buffer_size - 1) - s->len; - - ret = vsnprintf(s->buffer + s->len, len, fmt, args); - - if (ret >= len) { - expand_buffer(s); - goto try_again; - } - - s->len += ret; - - return len; -} - -/** - * trace_seq_puts - trace sequence printing of simple string - * @s: trace sequence descriptor - * @str: simple string to record - * - * The tracer may use either the sequence operations or its own - * copy to user routines. This function records a simple string - * into a special buffer (@s) for later retrieval by a sequencer - * or other mechanism. - */ -int trace_seq_puts(struct trace_seq *s, const char *str) -{ - int len; - - TRACE_SEQ_CHECK(s); - - len = strlen(str); - - while (len > ((s->buffer_size - 1) - s->len)) - expand_buffer(s); - - memcpy(s->buffer + s->len, str, len); - s->len += len; - - return len; -} - -int trace_seq_putc(struct trace_seq *s, unsigned char c) -{ - TRACE_SEQ_CHECK(s); - - while (s->len >= (s->buffer_size - 1)) - expand_buffer(s); - - s->buffer[s->len++] = c; - - return 1; -} - -void trace_seq_terminate(struct trace_seq *s) -{ - TRACE_SEQ_CHECK(s); - - /* There's always one character left on the buffer */ - s->buffer[s->len] = 0; -} - -int trace_seq_do_printf(struct trace_seq *s) -{ - TRACE_SEQ_CHECK(s); - return printf("%.*s", s->len, s->buffer); -} |