Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / debug / trace.cc

diff --git a/legacy-libs/grpc/deps/grpc/src/core/lib/debug/trace.cc b/legacy-libs/grpc/deps/grpc/src/core/lib/debug/trace.cc
new file mode 100644 (file)
index 0000000..84c0a38
--- /dev/null
+++ b/legacy-libs/grpc/deps/grpc/src/core/lib/debug/trace.cc
@@ -0,0 +1,154 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/debug/trace.h"
+
+#include <string.h>
+#include <type_traits>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+GPR_GLOBAL_CONFIG_DEFINE_STRING(
+    grpc_trace, "",
+    "A comma separated list of tracers that provide additional insight into "
+    "how gRPC C core is processing requests via debug logs.");
+
+int grpc_tracer_set_enabled(const char* name, int enabled);
+
+namespace grpc_core {
+
+TraceFlag* TraceFlagList::root_tracer_ = nullptr;
+
+bool TraceFlagList::Set(const char* name, bool enabled) {
+  TraceFlag* t;
+  if (0 == strcmp(name, "all")) {
+    for (t = root_tracer_; t; t = t->next_tracer_) {
+      t->set_enabled(enabled);
+    }
+  } else if (0 == strcmp(name, "list_tracers")) {
+    LogAllTracers();
+  } else if (0 == strcmp(name, "refcount")) {
+    for (t = root_tracer_; t; t = t->next_tracer_) {
+      if (strstr(t->name_, "refcount") != nullptr) {
+        t->set_enabled(enabled);
+      }
+    }
+  } else {
+    bool found = false;
+    for (t = root_tracer_; t; t = t->next_tracer_) {
+      if (0 == strcmp(name, t->name_)) {
+        t->set_enabled(enabled);
+        found = true;
+      }
+    }
+    // check for unknowns, but ignore "", to allow to GRPC_TRACE=
+    if (!found && 0 != strcmp(name, "")) {
+      gpr_log(GPR_ERROR, "Unknown trace var: '%s'", name);
+      return false; /* early return */
+    }
+  }
+  return true;
+}
+
+void TraceFlagList::Add(TraceFlag* flag) {
+  flag->next_tracer_ = root_tracer_;
+  root_tracer_ = flag;
+}
+
+void TraceFlagList::LogAllTracers() {
+  gpr_log(GPR_DEBUG, "available tracers:");
+  TraceFlag* t;
+  for (t = root_tracer_; t != nullptr; t = t->next_tracer_) {
+    gpr_log(GPR_DEBUG, "\t%s", t->name_);
+  }
+}
+
+// Flags register themselves on the list during construction
+TraceFlag::TraceFlag(bool default_enabled, const char* name) : name_(name) {
+  static_assert(std::is_trivially_destructible<TraceFlag>::value,
+                "TraceFlag needs to be trivially destructible.");
+  set_enabled(default_enabled);
+  TraceFlagList::Add(this);
+}
+
+}  // namespace grpc_core
+
+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;
+  size_t len;
+  GPR_ASSERT(end >= beg);
+  len = static_cast<size_t>(end - beg);
+  s = static_cast<char*>(gpr_malloc(len + 1));
+  memcpy(s, beg, len);
+  s[len] = 0;
+  *ss = static_cast<char**>(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 == nullptr) {
+    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 = nullptr;
+  size_t nstrings = 0;
+  size_t i;
+  split(s, &strings, &nstrings);
+
+  for (i = 0; i < nstrings; i++) {
+    if (strings[i][0] == '-') {
+      grpc_core::TraceFlagList::Set(strings[i] + 1, false);
+    } else {
+      grpc_core::TraceFlagList::Set(strings[i], true);
+    }
+  }
+
+  for (i = 0; i < nstrings; i++) {
+    gpr_free(strings[i]);
+  }
+  gpr_free(strings);
+}
+
+void grpc_tracer_init(const char* env_var_name) {
+  (void)env_var_name;  // suppress unused variable error
+  grpc_tracer_init();
+}
+
+void grpc_tracer_init() {
+  grpc_core::UniquePtr<char> value = GPR_GLOBAL_CONFIG_GET(grpc_trace);
+  parse(value.get());
+}
+
+void grpc_tracer_shutdown(void) {}
+
+int grpc_tracer_set_enabled(const char* name, int enabled) {
+  return grpc_core::TraceFlagList::Set(name, enabled != 0);
+}