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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/debug/trace.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/support/env.h"
#if GRPC_ENABLE_TRACING
gpr_uint32 grpc_trace_bits = 0;
static void add(const char *beg, const char *end, char ***ss, size_t *ns) {
size_t n = *ns;
size_t np = n + 1;
char *s = gpr_malloc(end - beg + 1);
memcpy(s, beg, end - beg);
s[end-beg] = 0;
*ss = gpr_realloc(*ss, sizeof(char**) * np);
(*ss)[n] = s;
*ns = np;
}
static void split(const char *s, char ***ss, size_t *ns) {
const char *c = strchr(s, ',');
if (c == NULL) {
add(s, s + strlen(s), ss, ns);
} else {
add(s, c, ss, ns);
split(c+1, ss, ns);
}
}
static void parse(const char *s) {
char **strings = NULL;
size_t nstrings = 0;
size_t i;
split(s, &strings, &nstrings);
grpc_trace_bits = 0;
for (i = 0; i < nstrings; i++) {
const char *s = strings[i];
if (0 == strcmp(s, "surface")) {
grpc_trace_bits |= GRPC_TRACE_SURFACE;
} else if (0 == strcmp(s, "channel")) {
grpc_trace_bits |= GRPC_TRACE_CHANNEL;
} else if (0 == strcmp(s, "tcp")) {
grpc_trace_bits |= GRPC_TRACE_TCP;
} else if (0 == strcmp(s, "secure_endpoint")) {
grpc_trace_bits |= GRPC_TRACE_SECURE_ENDPOINT;
} else if (0 == strcmp(s, "http")) {
grpc_trace_bits |= GRPC_TRACE_HTTP;
} else if (0 == strcmp(s, "all")) {
grpc_trace_bits = -1;
} else {
gpr_log(GPR_ERROR, "Unknown trace var: '%s'", s);
}
}
for (i = 0; i < nstrings; i++) {
gpr_free(strings[i]);
}
gpr_free(strings);
}
void grpc_init_trace_bits() {
char *e = gpr_getenv("GRPC_TRACE");
if (e == NULL) {
grpc_trace_bits = 0;
} else {
parse(e);
gpr_free(e);
}
}
#else
void grpc_init_trace_bits() {
}
#endif
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