test-debug.cc.svn-base

Google浏览器V8内核代码

// Copyright 2007-2008 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
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <stdlib.h>

#include "v8.h"

#include "api.h"
#include "debug.h"
#include "platform.h"
#include "stub-cache.h"
#include "cctest.h"


using ::v8::internal::EmbeddedVector;
using ::v8::internal::Object;
using ::v8::internal::OS;
using ::v8::internal::Handle;
using ::v8::internal::Heap;
using ::v8::internal::JSGlobalObject;
using ::v8::internal::Code;
using ::v8::internal::Debug;
using ::v8::internal::Debugger;
using ::v8::internal::StepAction;
using ::v8::internal::StepIn;  // From StepAction enum
using ::v8::internal::StepNext;  // From StepAction enum
using ::v8::internal::StepOut;  // From StepAction enum


// Size of temp buffer for formatting small strings.
#define SMALL_STRING_BUFFER_SIZE 80

// --- A d d i t i o n a l   C h e c k   H e l p e r s


// Helper function used by the CHECK_EQ function when given Address
// arguments.  Should not be called directly.
static inline void CheckEqualsHelper(const char* file, int line,
                                     const char* expected_source,
                                     ::v8::internal::Address expected,
                                     const char* value_source,
                                     ::v8::internal::Address value) {
  if (expected != value) {
    V8_Fatal(file, line, "CHECK_EQ(%s, %s) failed\n#   "
                         "Expected: %i\n#   Found: %i",
             expected_source, value_source, expected, value);
  }
}


// Helper function used by the CHECK_NE function when given Address
// arguments.  Should not be called directly.
static inline void CheckNonEqualsHelper(const char* file, int line,
                                        const char* unexpected_source,
                                        ::v8::internal::Address unexpected,
                                        const char* value_source,
                                        ::v8::internal::Address value) {
  if (unexpected == value) {
    V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n#   Value: %i",
             unexpected_source, value_source, value);
  }
}


// Helper function used by the CHECK function when given code
// arguments.  Should not be called directly.
static inline void CheckEqualsHelper(const char* file, int line,
                                     const char* expected_source,
                                     const Code* expected,
                                     const char* value_source,
                                     const Code* value) {
  if (expected != value) {
    V8_Fatal(file, line, "CHECK_EQ(%s, %s) failed\n#   "
                         "Expected: %p\n#   Found: %p",
             expected_source, value_source, expected, value);
  }
}


static inline void CheckNonEqualsHelper(const char* file, int line,
                                        const char* expected_source,
                                        const Code* expected,
                                        const char* value_source,
                                        const Code* value) {
  if (expected == value) {
    V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n#   Value: %p",
             expected_source, value_source, value);
  }
}


// --- H e l p e r   C l a s s e s


// Helper class for creating a V8 enviromnent for running tests
class DebugLocalContext {
 public:
  inline DebugLocalContext(
      v8::ExtensionConfiguration* extensions = 0,
      v8::Handle<v8::ObjectTemplate> global_template =
          v8::Handle<v8::ObjectTemplate>(),
      v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>())
      : context_(v8::Context::New(extensions, global_template, global_object)) {
    context_->Enter();
  }
  inline ~DebugLocalContext() {
    context_->Exit();
    context_.Dispose();
  }
  inline v8::Context* operator->() { return *context_; }
  inline v8::Context* operator*() { return *context_; }
  inline bool IsReady() { return !context_.IsEmpty(); }
  void ExposeDebug() {
    // Expose the debug context global object in the global object for testing.
    Debug::Load();
    Handle<JSGlobalObject> global(Handle<JSGlobalObject>::cast(
        v8::Utils::OpenHandle(*context_->Global())));
    Handle<JSGlobalObject> debug_global(JSGlobalObject::cast(
        Debug::debug_context()->global()));
    debug_global->set_security_token(global->security_token());
    Handle<v8::internal::String> debug_string =
        v8::internal::Factory::LookupAsciiSymbol("debug");
    SetProperty(global, debug_string, debug_global, DONT_ENUM);
  }
 private:
  v8::Persistent<v8::Context> context_;
};


// --- H e l p e r   F u n c t i o n s


// Compile and run the supplied source and return the fequested function.
static v8::Local<v8::Function> CompileFunction(DebugLocalContext* env,
                                               const char* source,
                                               const char* function_name) {
  v8::Script::Compile(v8::String::New(source))->Run();
  return v8::Local<v8::Function>::Cast(
      (*env)->Global()->Get(v8::String::New(function_name)));
}

// Helper function that compiles and runs the source.
static v8::Local<v8::Value> CompileRun(const char* source) {
  return v8::Script::Compile(v8::String::New(source))->Run();
}

// Is there any debug info for the function?
static bool HasDebugInfo(v8::Handle<v8::Function> fun) {
  Handle<v8::internal::JSFunction> f = v8::Utils::OpenHandle(*fun);
  Handle<v8::internal::SharedFunctionInfo> shared(f->shared());
  return Debug::HasDebugInfo(shared);
}


// Set a break point in a function and return the associated break point
// number.
static int SetBreakPoint(Handle<v8::internal::JSFunction> fun, int position) {
  static int break_point = 0;
  Handle<v8::internal::SharedFunctionInfo> shared(fun->shared());
  Debug::SetBreakPoint(
      shared, position,
      Handle<Object>(v8::internal::Smi::FromInt(++break_point)));
  return break_point;
}


// Set a break point in a function and return the associated break point
// number.
static int SetBreakPoint(v8::Handle<v8::Function> fun, int position) {
  return SetBreakPoint(v8::Utils::OpenHandle(*fun), position);
}


// Set a break point in a function using the Debug object and return the
// associated break point number.
static int SetBreakPointFromJS(const char* function_name,
                               int line, int position) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.setBreakPoint(%s,%d,%d)",
               function_name, line, position);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Handle<v8::String> str = v8::String::New(buffer.start());
  return v8::Script::Compile(str)->Run()->Int32Value();
}


// Set a break point in a script using the global Debug object.
static int SetScriptBreakPointFromJS(const char* script_data,
                                     int line, int column) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  if (column >= 0) {
    // Column specified set script break point on precise location.
    OS::SNPrintF(buffer,
                 "debug.Debug.setScriptBreakPoint(\"%s\",%d,%d)",
                 script_data, line, column);
  } else {
    // Column not specified set script break point on line.
    OS::SNPrintF(buffer,
                 "debug.Debug.setScriptBreakPoint(\"%s\",%d)",
                 script_data, line);
  }
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Handle<v8::String> str = v8::String::New(buffer.start());
  return v8::Script::Compile(str)->Run()->Int32Value();
}


// Clear a break point.
static void ClearBreakPoint(int break_point) {
  Debug::ClearBreakPoint(
      Handle<Object>(v8::internal::Smi::FromInt(break_point)));
}


// Clear a break point using the global Debug object.
static void ClearBreakPointFromJS(int break_point_number) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.clearBreakPoint(%d)",
               break_point_number);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Script::Compile(v8::String::New(buffer.start()))->Run();
}


static void EnableScriptBreakPointFromJS(int break_point_number) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.enableScriptBreakPoint(%d)",
               break_point_number);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Script::Compile(v8::String::New(buffer.start()))->Run();
}


static void DisableScriptBreakPointFromJS(int break_point_number) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.disableScriptBreakPoint(%d)",
               break_point_number);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Script::Compile(v8::String::New(buffer.start()))->Run();
}


static void ChangeScriptBreakPointConditionFromJS(int break_point_number,
                                                  const char* condition) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.changeScriptBreakPointCondition(%d, \"%s\")",
               break_point_number, condition);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Script::Compile(v8::String::New(buffer.start()))->Run();
}


static void ChangeScriptBreakPointIgnoreCountFromJS(int break_point_number,
                                                    int ignoreCount) {
  EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
  OS::SNPrintF(buffer,
               "debug.Debug.changeScriptBreakPointIgnoreCount(%d, %d)",
               break_point_number, ignoreCount);
  buffer[SMALL_STRING_BUFFER_SIZE - 1] = '\0';
  v8::Script::Compile(v8::String::New(buffer.start()))->Run();
}


// Change break on exception.
static void ChangeBreakOnException(bool caught, bool uncaught) {
  Debug::ChangeBreakOnException(v8::internal::BreakException, caught);
  Debug::ChangeBreakOnException(v8::internal::BreakUncaughtException, uncaught);
}


// Change break on exception using the global Debug object.
static void ChangeBreakOnExceptionFromJS(bool caught, bool uncaught) {
  if (caught) {
    v8::Script::Compile(
        v8::String::New("debug.Debug.setBreakOnException()"))->Run();
  } else {
    v8::Script::Compile(
        v8::String::New("debug.Debug.clearBreakOnException()"))->Run();
  }
  if (uncaught) {
    v8::Script::Compile(
        v8::String::New("debug.Debug.setBreakOnUncaughtException()"))->Run();
  } else {
    v8::Script::Compile(
        v8::String::New("debug.Debug.clearBreakOnUncaughtException()"))->Run();
  }
}


// Prepare to step to next break location.
static void PrepareStep(StepAction step_action) {
  Debug::PrepareStep(step_action, 1);
}


// This function is in namespace v8::internal to be friend with class
// v8::internal::Debug.
namespace v8 { namespace internal {  // NOLINT

// Collect the currently debugged functions.
Handle<FixedArray> GetDebuggedFunctions() {
  v8::internal::DebugInfoListNode* node = Debug::debug_info_list_;

  // Find the number of debugged functions.
  int count = 0;
  while (node) {
    count++;
    node = node->next();
  }

  // Allocate array for the debugged functions
  Handle<FixedArray> debugged_functions =
      v8::internal::Factory::NewFixedArray(count);

  // Run through the debug info objects and collect all functions.
  count = 0;
  while (node) {
    debugged_functions->set(count++, *node->debug_info());
    node = node->next();
  }

  return debugged_functions;
}


static Handle<Code> ComputeCallDebugBreak(int argc) {
  CALL_HEAP_FUNCTION(v8::internal::StubCache::ComputeCallDebugBreak(argc),
                     Code);
}

} }  // namespace v8::internal

// Inherit from BreakLocationIterator to get access to protected parts for
// testing.
class TestBreakLocationIterator: public v8::internal::BreakLocationIterator {
 public:
  explicit TestBreakLocationIterator(Handle<v8::internal::DebugInfo> debug_info)
    : BreakLocationIterator(debug_info, v8::internal::SOURCE_BREAK_LOCATIONS) {}
  v8::internal::RelocIterator* it() { return reloc_iterator_; }
  v8::internal::RelocIterator* it_original() {
    return reloc_iterator_original_;
  }
};


// Compile a function, set a break point and check that the call at the break
// location in the code is the expected debug_break function.
void CheckDebugBreakFunction(DebugLocalContext* env,
                             const char* source, const char* name,
                             int position, v8::internal::RelocInfo::Mode mode,
                             Code* debug_break) {
  // Create function and set the break point.