tint->dawn: Shuffle source tree in preperation of merging repos
docs/ -> docs/tint/
fuzzers/ -> src/tint/fuzzers/
samples/ -> src/tint/cmd/
src/ -> src/tint/
test/ -> test/tint/
BUG=tint:1418,tint:1433
Change-Id: Id2aa79f989aef3245b80ef4aa37a27ff16cd700b
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/80482
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
diff --git a/src/tint/utils/debugger.cc b/src/tint/utils/debugger.cc
new file mode 100644
index 0000000..aded5b6
--- /dev/null
+++ b/src/tint/utils/debugger.cc
@@ -0,0 +1,63 @@
+// Copyright 2022 The Tint 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 "src/tint/utils/debugger.h"
+
+#ifdef TINT_ENABLE_BREAK_IN_DEBUGGER
+
+#ifdef _MSC_VER
+#include <Windows.h>
+#elif defined(__linux__)
+#include <signal.h>
+#include <fstream>
+#include <string>
+#endif
+
+#ifdef _MSC_VER
+#define TINT_DEBUGGER_BREAK_DEFINED
+void tint::debugger::Break() {
+ if (::IsDebuggerPresent()) {
+ ::DebugBreak();
+ }
+}
+
+#elif defined(__linux__)
+
+#define TINT_DEBUGGER_BREAK_DEFINED
+void tint::debugger::Break() {
+ // A process is being traced (debugged) if "/proc/self/status" contains a
+ // line with "TracerPid: <non-zero-digit>...".
+ bool is_traced = false;
+ std::ifstream fin("/proc/self/status");
+ std::string line;
+ while (!is_traced && std::getline(fin, line)) {
+ const char kPrefix[] = "TracerPid:\t";
+ static constexpr int kPrefixLen = sizeof(kPrefix) - 1;
+ if (line.length() > kPrefixLen &&
+ line.compare(0, kPrefixLen, kPrefix) == 0) {
+ is_traced = line[kPrefixLen] != '0';
+ }
+ }
+
+ if (is_traced) {
+ raise(SIGTRAP);
+ }
+}
+#endif // platform
+
+#endif // TINT_ENABLE_BREAK_IN_DEBUGGER
+
+#ifndef TINT_DEBUGGER_BREAK_DEFINED
+void tint::debugger::Break() {}
+#endif
