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event_fout.c
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#include "phpspy.h"
typedef struct event_handler_fout_udata_s {
int fd;
char *buf;
char *cur;
size_t buf_size;
size_t rem;
} event_handler_fout_udata_t;
static int event_handler_fout_write(event_handler_fout_udata_t *udata);
static int event_handler_fout_snprintf(char **s, size_t *n, size_t *ret_len, int repl_delim, const char *fmt, ...);
static int event_handler_fout_open(int *fd);
int event_handler_fout(struct trace_context_s *context, int event_type) {
int rv, fd;
size_t len;
trace_frame_t *frame;
trace_request_t *request;
event_handler_fout_udata_t *udata;
struct timeval tv;
udata = (event_handler_fout_udata_t*)context->event_udata;
if (!udata && event_type != PHPSPY_TRACE_EVENT_INIT) {
return PHPSPY_ERR;
}
len = 0;
switch (event_type) {
case PHPSPY_TRACE_EVENT_INIT:
try(rv, event_handler_fout_open(&fd));
udata = calloc(1, sizeof(event_handler_fout_udata_t));
udata->fd = fd;
udata->buf_size = opt_fout_buffer_size + 1; /* + 1 for null char */
udata->buf = malloc(udata->buf_size);
udata->cur = udata->buf;
udata->rem = udata->buf_size;
context->event_udata = udata;
break;
case PHPSPY_TRACE_EVENT_STACK_BEGIN:
udata->cur = udata->buf;
udata->cur[0] = '\0';
udata->rem = udata->buf_size;
break;
case PHPSPY_TRACE_EVENT_FRAME:
frame = &context->event.frame;
try(rv, event_handler_fout_snprintf(
&udata->cur,
&udata->rem,
&len,
1,
"%d %.*s%s%.*s %.*s:%d",
frame->depth,
(int)frame->loc.class_len, frame->loc.class,
frame->loc.class_len > 0 ? "::" : "",
(int)frame->loc.func_len, frame->loc.func,
(int)frame->loc.file_len, frame->loc.file,
frame->loc.lineno
));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
break;
case PHPSPY_TRACE_EVENT_VARPEEK:
try(rv, event_handler_fout_snprintf(
&udata->cur,
&udata->rem,
&len,
1,
"# varpeek %s@%s = %s",
context->event.varpeek.var->name,
context->event.varpeek.entry->filename_lineno,
context->event.varpeek.zval_str
));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
break;
case PHPSPY_TRACE_EVENT_GLOPEEK:
try(rv, event_handler_fout_snprintf(
&udata->cur,
&udata->rem,
&len,
1,
"# glopeek %s = %s",
context->event.glopeek.gentry->key,
context->event.glopeek.zval_str
));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
break;
case PHPSPY_TRACE_EVENT_REQUEST:
request = &context->event.request;
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# uri = %s", request->uri));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# path = %s", request->path));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# qstring = %s", request->qstring));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# cookie = %s", request->cookie));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# ts = %f", request->ts));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
break;
case PHPSPY_TRACE_EVENT_MEM:
try(rv, event_handler_fout_snprintf(
&udata->cur,
&udata->rem,
&len,
1,
"# mem %lu %lu",
(uint64_t)context->event.mem.size,
(uint64_t)context->event.mem.peak
));
try(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
break;
case PHPSPY_TRACE_EVENT_STACK_END:
if (udata->cur == udata->buf) {
/* buffer is empty */
break;
}
if (opt_filter_re) {
rv = regexec(opt_filter_re, udata->buf, 0, NULL, 0);
if (opt_filter_negate == 0 && rv != 0) break;
if (opt_filter_negate != 0 && rv == 0) break;
}
do {
if (opt_verbose_fields_ts) {
gettimeofday(&tv, NULL);
try_break(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# trace_ts = %f", (double)(tv.tv_sec + tv.tv_usec / 1000000.0)));
try_break(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
}
if (opt_verbose_fields_pid) {
try_break(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 1, "# pid = %d", context->target.pid));
try_break(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_frame_delim));
}
try_break(rv, event_handler_fout_snprintf(&udata->cur, &udata->rem, &len, 0, "%c", opt_trace_delim));
} while (0);
try(rv, event_handler_fout_write(udata));
break;
case PHPSPY_TRACE_EVENT_DEINIT:
close(udata->fd);
free(udata->buf);
free(udata);
break;
}
return PHPSPY_OK;
}
static int event_handler_fout_write(event_handler_fout_udata_t *udata) {
ssize_t write_len;
write_len = (udata->cur - udata->buf);
if (write_len < 1) {
/* nothing to write */
} else if (write(udata->fd, udata->buf, write_len) != write_len) {
log_error("event_handler_fout: Write failed (%s)\n", errno != 0 ? strerror(errno) : "partial");
return PHPSPY_ERR;
}
return PHPSPY_OK;
}
static int event_handler_fout_snprintf(char **s, size_t *n, size_t *ret_len, int repl_delim, const char *fmt, ...) {
int len, i;
va_list vl;
char *c;
va_start(vl, fmt);
len = vsnprintf(*s, *n, fmt, vl);
va_end(vl);
if (len < 0 || (size_t)len >= *n) {
log_error("event_handler_fout_snprintf: Not enough space in buffer; truncating\n");
return PHPSPY_ERR | PHPSPY_ERR_BUF_FULL;
}
if (repl_delim) {
for (i = 0; i < len; i++) { /* TODO optimize */
c = *s + i;
if (*c == opt_trace_delim || *c == opt_frame_delim) {
*c = '?';
}
}
}
*s += len;
*n -= len;
*ret_len = (size_t)len;
return PHPSPY_OK;
}
static int event_handler_fout_open(int *fd) {
int tfd;
if (strcmp(opt_path_output, "-") == 0) {
tfd = dup(STDOUT_FILENO);
if (tfd < 0) {
perror("event_handler_fout_open: dup");
return PHPSPY_ERR;
}
} else {
tfd = open(opt_path_output, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (tfd < 0) {
perror("event_handler_fout_open: open");
return PHPSPY_ERR;
}
}
*fd = tfd;
return PHPSPY_OK;
}