Test tracing of string allocations

runtime/vm/intrinsifier_ia32.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 1851 matching lines @@
 }
 
 
 // Allocates one-byte string of length 'end - start'. The content is not
 // initialized. 'length-reg' contains tagged length.
 // Returns new string as tagged pointer in EAX.
 static void TryAllocateOnebyteString(Assembler* assembler,
                                      Label* ok,
                                      Label* failure,
                                      Register length_reg) {
+  __ MaybeTraceAllocation(kOneByteStringCid, EAX, failure, false);
   if (length_reg != EDI) {
     __ movl(EDI, length_reg);
   }
   Label pop_and_fail;
   __ pushl(EDI);  // Preserve length.
   __ SmiUntag(EDI);
   const intptr_t fixed_size = sizeof(RawString) + kObjectAlignment - 1;
   __ leal(EDI, Address(EDI, TIMES_1, fixed_size));  // EDI is untagged.
   __ andl(EDI, Immediate(-kObjectAlignment));
 
@@ skipping 272 matching lines @@
                         Isolate::current_tag_offset());
   // Set return value to Isolate::current_tag_.
   __ movl(EAX, current_tag_addr);
   __ ret();
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32