Expose DumpBacktrace for debugging purposes.

src/checks.h

 // Copyright 2012 the V8 project authors. 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
@@ skipping 288 matching lines @@
 namespace v8 {
 namespace internal {
 #ifdef ENABLE_SLOW_ASSERTS
 #define SLOW_ASSERT(condition) \
   CHECK(!v8::internal::FLAG_enable_slow_asserts || (condition))
 extern bool FLAG_enable_slow_asserts;
 #else
 #define SLOW_ASSERT(condition) ((void) 0)
 const bool FLAG_enable_slow_asserts = false;
 #endif
-}  // namespace internal
-}  // namespace v8
+
+// Exposed for making debugging easier (to see where your function is being
+// called, just add a call to DumpBacktrace).
+void DumpBacktrace();
+
+} }  // namespace v8::internal
 
 
 // The ASSERT macro is equivalent to CHECK except that it only
 // generates code in debug builds.
 #ifdef DEBUG
 #define ASSERT_RESULT(expr)    CHECK(expr)
 #define ASSERT(condition)      CHECK(condition)
 #define ASSERT_EQ(v1, v2)      CHECK_EQ(v1, v2)
 #define ASSERT_NE(v1, v2)      CHECK_NE(v1, v2)
 #define ASSERT_GE(v1, v2)      CHECK_GE(v1, v2)
@@ skipping 19 matching lines @@
 
 // "Extra checks" are lightweight checks that are enabled in some release
 // builds.
 #ifdef ENABLE_EXTRA_CHECKS
 #define EXTRA_CHECK(condition) CHECK(condition)
 #else
 #define EXTRA_CHECK(condition) ((void) 0)
 #endif
 
 #endif  // V8_CHECKS_H_