1 files changed, 96 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/location.cc b/security/sandbox/chromium/base/location.cc
new file mode 100644
index 0000000000..cf189341c7
--- /dev/null
+++ b/security/sandbox/chromium/base/location.cc
@@ -0,0 +1,96 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/location.h"
+
+#if defined(COMPILER_MSVC)
+#include <intrin.h>
+#endif
+
+#include "base/compiler_specific.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/stringprintf.h"
+#include "build/build_config.h"
+
+namespace base {
+
+Location::Location() = default;
+Location::Location(const Location& other) = default;
+
+Location::Location(const char* file_name, const void* program_counter)
+    : file_name_(file_name), program_counter_(program_counter) {}
+
+Location::Location(const char* function_name,
+                   const char* file_name,
+                   int line_number,
+                   const void* program_counter)
+    : function_name_(function_name),
+      file_name_(file_name),
+      line_number_(line_number),
+      program_counter_(program_counter) {
+#if !defined(OS_NACL)
+  // The program counter should not be null except in a default constructed
+  // (empty) Location object. This value is used for identity, so if it doesn't
+  // uniquely identify a location, things will break.
+  //
+  // The program counter isn't supported in NaCl so location objects won't work
+  // properly in that context.
+  DCHECK(program_counter);
+#endif
+}
+
+std::string Location::ToString() const {
+  if (has_source_info()) {
+    return std::string(function_name_) + "@" + file_name_ + ":" +
+           NumberToString(line_number_);
+  }
+  return StringPrintf("pc:%p", program_counter_);
+}
+
+#if defined(COMPILER_MSVC)
+#define RETURN_ADDRESS() _ReturnAddress()
+#elif defined(COMPILER_GCC) && !defined(OS_NACL)
+#define RETURN_ADDRESS() \
+  __builtin_extract_return_addr(__builtin_return_address(0))
+#else
+#define RETURN_ADDRESS() nullptr
+#endif
+
+// static
+NOINLINE Location Location::CreateFromHere(const char* file_name) {
+  return Location(file_name, RETURN_ADDRESS());
+}
+
+// static
+NOINLINE Location Location::CreateFromHere(const char* function_name,
+                                           const char* file_name,
+                                           int line_number) {
+  return Location(function_name, file_name, line_number, RETURN_ADDRESS());
+}
+
+#if SUPPORTS_LOCATION_BUILTINS && BUILDFLAG(ENABLE_LOCATION_SOURCE)
+// static
+NOINLINE Location Location::Current(const char* function_name,
+                                    const char* file_name,
+                                    int line_number) {
+  return Location(function_name, file_name, line_number, RETURN_ADDRESS());
+}
+#elif SUPPORTS_LOCATION_BUILTINS
+// static
+NOINLINE Location Location::Current(const char* file_name) {
+  return Location(file_name, RETURN_ADDRESS());
+}
+#else
+// static
+NOINLINE Location Location::Current() {
+  return Location(nullptr, RETURN_ADDRESS());
+}
+#endif
+
+//------------------------------------------------------------------------------
+NOINLINE const void* GetProgramCounter() {
+  return RETURN_ADDRESS();
+}
+
+}  // namespace base