Adds Simulator Longjmp and enables many tests for arm64.

runtime/vm/simulator_arm64.cc

 // Copyright (c) 2014, 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.
 
 #include <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
@@ skipping 387 matching lines @@
   // the size specified by the user and the buffer space needed for
   // handling stack overflow exceptions. To be safe in potential
   // stack underflows we also add some underflow buffer space.
   stack_ = new char[(Isolate::GetSpecifiedStackSize() +
                      Isolate::kStackSizeBuffer +
                      kSimulatorStackUnderflowSize)];
   pc_modified_ = false;
   icount_ = 0;
   break_pc_ = NULL;
   break_instr_ = 0;
+  last_setjmp_buffer_ = NULL;
   top_exit_frame_info_ = 0;
 
   // Setup architecture state.
   // All registers are initialized to zero to start with.
   for (int i = 0; i < kNumberOfCpuRegisters; i++) {
     registers_[i] = 0;
   }
   n_flag_ = false;
   z_flag_ = false;
   c_flag_ = false;
@@ skipping 1640 matching lines @@
   set_register(R28, r28_val);
   set_register(R29, r29_val);
 
   // Restore the SP register and return R0.
   set_register(R31, sp_before_call, R31IsSP);
   int64_t return_value;
   return_value = get_register(R0);
   return return_value;
 }
 
+
+void Simulator::Longjmp(uword pc,
+                        uword sp,
+                        uword fp,
+                        RawObject* raw_exception,
+                        RawObject* raw_stacktrace) {
+  // Walk over all setjmp buffers (simulated --> C++ transitions)
+  // and try to find the setjmp associated with the simulated stack pointer.
+  SimulatorSetjmpBuffer* buf = last_setjmp_buffer();
+  while (buf->link() != NULL && buf->link()->sp() <= sp) {
+    buf = buf->link();
+  }
+  ASSERT(buf != NULL);
+
+  // The C++ caller has not cleaned up the stack memory of C++ frames.
+  // Prepare for unwinding frames by destroying all the stack resources
+  // in the previous C++ frames.
+  uword native_sp = buf->native_sp();
+  Isolate* isolate = Isolate::Current();
+  while (isolate->top_resource() != NULL &&
+         (reinterpret_cast<uword>(isolate->top_resource()) < native_sp)) {
+    isolate->top_resource()->~StackResource();
+  }
+
+  // Unwind the C++ stack and continue simulation in the target frame.
+  set_pc(static_cast<int64_t>(pc));
+  set_register(R31, static_cast<int64_t>(sp), R31IsSP);
+  set_register(FP, static_cast<int64_t>(fp));
+
+  ASSERT(raw_exception != Object::null());
+  set_register(kExceptionObjectReg, bit_cast<int64_t>(raw_exception));
+  set_register(kStackTraceObjectReg, bit_cast<int64_t>(raw_stacktrace));
+  buf->Longjmp();
+}
+
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM64)
 
 #endif  // defined TARGET_ARCH_ARM64