test-debug.cc.svn-base

Google浏览器V8内核代码

  // Create a function for checking the function when hitting a break point.
  frame_function_name = CompileFunction(&env,
                                        frame_function_name_source,
                                        "frame_function_name");

  v8::Debug::AddDebugEventListener(DebugEventBreakPointHitCount,
                                   v8::Undefined());

  v8::Local<v8::Function> f;
  v8::Local<v8::Function> g;
  v8::Local<v8::String> script = v8::String::New(
    "a = 0                      // line 0\n"
    "function f() {\n"
    "  a = 1;                   // line 2\n"
    "}\n"
    " a = 2;                    // line 4\n"
    "  /* xx */ function g() {  // line 5\n"
    "    function h() {         // line 6\n"
    "      a = 3;               // line 7\n"
    "    }\n"
    "    h();                   // line 9\n"
    "    a = 4;                 // line 10\n"
    "  }\n"
    " a=5;                      // line 12");

  // Set a couple script break point before the script is loaded.
  int sbp1 = SetScriptBreakPointFromJS("test.html", 0, -1);
  int sbp2 = SetScriptBreakPointFromJS("test.html", 1, -1);
  int sbp3 = SetScriptBreakPointFromJS("test.html", 5, -1);

  // Compile the script and get the function.
  break_point_hit_count = 0;
  v8::ScriptOrigin origin(v8::String::New("test.html"), v8::Integer::New(0));
  v8::Script::Compile(script, &origin)->Run();
  f = v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("f")));
  g = v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("g")));

  // Chesk that a break point was hit when the script was run.
  CHECK_EQ(1, break_point_hit_count);
  CHECK_EQ(0, strlen(last_function_hit));

  // Call f and check that the script break point.
  f->Call(env->Global(), 0, NULL);
  CHECK_EQ(2, break_point_hit_count);
  CHECK_EQ("f", last_function_hit);

  // Call g and check that the script break point.
  g->Call(env->Global(), 0, NULL);
  CHECK_EQ(3, break_point_hit_count);
  CHECK_EQ("g", last_function_hit);

  // Clear the script break point on g and set one on h.
  ClearBreakPointFromJS(sbp3);
  int sbp4 = SetScriptBreakPointFromJS("test.html", 6, -1);

  // Call g and check that the script break point in h is hit.
  g->Call(env->Global(), 0, NULL);
  CHECK_EQ(4, break_point_hit_count);
  CHECK_EQ("h", last_function_hit);

  // Clear break points in f and h. Set a new one in the script between
  // functions f and g and test that there is no break points in f and g any
  // more.
  ClearBreakPointFromJS(sbp2);
  ClearBreakPointFromJS(sbp4);
  int sbp5 = SetScriptBreakPointFromJS("test.html", 4, -1);
  break_point_hit_count = 0;
  f->Call(env->Global(), 0, NULL);
  g->Call(env->Global(), 0, NULL);
  CHECK_EQ(0, break_point_hit_count);

  // Reload the script which should hit two break points.
  break_point_hit_count = 0;
  v8::Script::Compile(script, &origin)->Run();
  CHECK_EQ(2, break_point_hit_count);
  CHECK_EQ(0, strlen(last_function_hit));

  // Set a break point in the code after the last function decleration.
  int sbp6 = SetScriptBreakPointFromJS("test.html", 12, -1);

  // Reload the script which should hit three break points.
  break_point_hit_count = 0;
  v8::Script::Compile(script, &origin)->Run();
  CHECK_EQ(3, break_point_hit_count);
  CHECK_EQ(0, strlen(last_function_hit));

  // Clear the last break points, and reload the script which should not hit any
  // break points.
  ClearBreakPointFromJS(sbp1);
  ClearBreakPointFromJS(sbp5);
  ClearBreakPointFromJS(sbp6);
  break_point_hit_count = 0;
  v8::Script::Compile(script, &origin)->Run();
  CHECK_EQ(0, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventBreakPointHitCount);
}


// Test that it is possible to remove the last break point for a function
// inside the break handling of that break point.
TEST(RemoveBreakPointInBreak) {
  v8::HandleScope scope;
  DebugLocalContext env;

  v8::Local<v8::Function> foo =
      CompileFunction(&env, "function foo(){a=1;}", "foo");
  debug_event_remove_break_point = SetBreakPoint(foo, 0);

  // Register the debug event listener pasing the function
  v8::Debug::AddDebugEventListener(DebugEventRemoveBreakPoint, foo);

  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);
  CHECK_EQ(1, break_point_hit_count);

  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);
  CHECK_EQ(0, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventRemoveBreakPoint);
}


// Test that the debugger statement causes a break.
TEST(DebuggerStatement) {
  break_point_hit_count = 0;
  v8::HandleScope scope;
  DebugLocalContext env;
  v8::Debug::AddDebugEventListener(DebugEventBreakPointHitCount,
                                   v8::Undefined());
  v8::Script::Compile(v8::String::New("function bar(){debugger}"))->Run();
  v8::Script::Compile(v8::String::New(
      "function foo(){debugger;debugger;}"))->Run();
  v8::Local<v8::Function> foo =
      v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("foo")));
  v8::Local<v8::Function> bar =
      v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("bar")));

  // Run function with debugger statement
  bar->Call(env->Global(), 0, NULL);
  CHECK_EQ(1, break_point_hit_count);

  // Run function with two debugger statement
  foo->Call(env->Global(), 0, NULL);
  CHECK_EQ(3, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventBreakPointHitCount);
}


// Thest that the evaluation of expressions when a break point is hit generates
// the correct results.
TEST(DebugEvaluate) {
  v8::HandleScope scope;
  DebugLocalContext env;
  env.ExposeDebug();

  // Create a function for checking the evaluation when hitting a break point.
  evaluate_check_function = CompileFunction(&env,
                                            evaluate_check_source,
                                            "evaluate_check");
  // Register the debug event listener
  v8::Debug::AddDebugEventListener(DebugEventEvaluate);

  // Different expected vaules of x and a when in a break point (u = undefined,
  // d = Hello, world!).
  struct EvaluateCheck checks_uu[] = {
    {"x", v8::Undefined()},
    {"a", v8::Undefined()},
    {NULL, v8::Handle<v8::Value>()}
  };
  struct EvaluateCheck checks_hu[] = {
    {"x", v8::String::New("Hello, world!")},
    {"a", v8::Undefined()},
    {NULL, v8::Handle<v8::Value>()}
  };
  struct EvaluateCheck checks_hh[] = {
    {"x", v8::String::New("Hello, world!")},
    {"a", v8::String::New("Hello, world!")},
    {NULL, v8::Handle<v8::Value>()}
  };

  // Simple test function. The "y=0" is in the function foo to provide a break
  // location. For "y=0" the "y" is at position 15 in the barbar function
  // therefore setting breakpoint at position 15 will break at "y=0" and
  // setting it higher will break after.
  v8::Local<v8::Function> foo = CompileFunction(&env,
    "function foo(x) {"
    "  var a;"
    "  y=0; /* To ensure break location.*/"
    "  a=x;"
    "}",
    "foo");
  const int foo_break_position = 15;

  // Arguments with one parameter "Hello, world!"
  v8::Handle<v8::Value> argv_foo[1] = { v8::String::New("Hello, world!") };

  // Call foo with breakpoint set before a=x and undefined as parameter.
  int bp = SetBreakPoint(foo, foo_break_position);
  checks = checks_uu;
  foo->Call(env->Global(), 0, NULL);

  // Call foo with breakpoint set before a=x and parameter "Hello, world!".
  checks = checks_hu;
  foo->Call(env->Global(), 1, argv_foo);

  // Call foo with breakpoint set after a=x and parameter "Hello, world!".
  ClearBreakPoint(bp);
  SetBreakPoint(foo, foo_break_position + 1);
  checks = checks_hh;
  foo->Call(env->Global(), 1, argv_foo);

  // Test function with an inner function. The "y=0" is in function barbar
  // to provide a break location. For "y=0" the "y" is at position 8 in the
  // barbar function therefore setting breakpoint at position 8 will break at
  // "y=0" and setting it higher will break after.
  v8::Local<v8::Function> bar = CompileFunction(&env,
    "y = 0;"
    "x = 'Goodbye, world!';"
    "function bar(x, b) {"
    "  var a;"
    "  function barbar() {"
    "    y=0; /* To ensure break location.*/"
    "    a=x;"
    "  };"
    "  debug.Debug.clearAllBreakPoints();"
    "  barbar();"
    "  y=0;a=x;"
    "}",
    "bar");
  const int barbar_break_position = 8;

  // Call bar setting breakpoint before a=x in barbar and undefined as
  // parameter.
  checks = checks_uu;
  v8::Handle<v8::Value> argv_bar_1[2] = {
    v8::Undefined(),
    v8::Number::New(barbar_break_position)
  };
  bar->Call(env->Global(), 2, argv_bar_1);

  // Call bar setting breakpoint before a=x in barbar and parameter
  // "Hello, world!".
  checks = checks_hu;
  v8::Handle<v8::Value> argv_bar_2[2] = {
    v8::String::New("Hello, world!"),
    v8::Number::New(barbar_break_position)
  };
  bar->Call(env->Global(), 2, argv_bar_2);

  // Call bar setting breakpoint after a=x in barbar and parameter
  // "Hello, world!".
  checks = checks_hh;
  v8::Handle<v8::Value> argv_bar_3[2] = {
    v8::String::New("Hello, world!"),
    v8::Number::New(barbar_break_position + 1)
  };
  bar->Call(env->Global(), 2, argv_bar_3);

  v8::Debug::RemoveDebugEventListener(DebugEventEvaluate);
}


// Simple test of the stepping mechanism using only store ICs.
TEST(DebugStepLinear) {
  v8::HandleScope scope;
  DebugLocalContext env;

  // Create a function for testing stepping.
  v8::Local<v8::Function> foo = CompileFunction(&env,
                                                "function foo(){a=1;b=1;c=1;}",
                                                "foo");
  SetBreakPoint(foo, 3);

  // Register a debug event listener which steps and counts.
  v8::Debug::AddDebugEventListener(DebugEventStep);

  step_action = StepIn;
  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);

  // With stepping all break locations are hit.
  CHECK_EQ(4, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventStep);

  // Register a debug event listener which just counts.
  v8::Debug::AddDebugEventListener(DebugEventBreakPointHitCount);

  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);

  // Without stepping only active break points are hit.
  CHECK_EQ(1, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventBreakPointHitCount);
}


// Test the stepping mechanism with different ICs.
TEST(DebugStepLinearMixedICs) {
  v8::HandleScope scope;
  DebugLocalContext env;

  // Create a function for testing stepping.
  v8::Local<v8::Function> foo = CompileFunction(&env,
      "function bar() {};"
      "function foo() {"
      "  var x;"
      "  var index='name';"
      "  var y = {};"
      "  a=1;b=2;x=a;y[index]=3;x=y[index];bar();}", "foo");
  SetBreakPoint(foo, 0);

  // Register a debug event listener which steps and counts.
  v8::Debug::AddDebugEventListener(DebugEventStep);

  step_action = StepIn;
  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);

  // With stepping all break locations are hit. For ARM the keyed load/store
  // is not hit as they are not implemented as ICs.
#if defined (__arm__) || defined(__thumb__)
  CHECK_EQ(6, break_point_hit_count);
#else
  CHECK_EQ(8, break_point_hit_count);
#endif

  v8::Debug::RemoveDebugEventListener(DebugEventStep);

  // Register a debug event listener which just counts.
  v8::Debug::AddDebugEventListener(DebugEventBreakPointHitCount);

  break_point_hit_count = 0;
  foo->Call(env->Global(), 0, NULL);

  // Without stepping only active break points are hit.
  CHECK_EQ(1, break_point_hit_count);

  v8::Debug::RemoveDebugEventListener(DebugEventBreakPointHitCount);
}


TEST(DebugStepIf) {
  v8::HandleScope scope;
  DebugLocalContext env;

  // Register a debug event listener which steps and counts.
  v8::Debug::AddDebugEventListener(DebugEventStep);

  // Create a function for testing stepping.
  const int argc = 1;
  const char* src = "function foo(x) { "
                    "  a = 1;"
                    "  if (x) {"
                    "    b = 1;"
                    "  } else {"
                    "    c = 1;"
                    "    d = 1;"
                    "  }"
                    "}";
  v8::Local<v8::Function> foo = CompileFunction(&env, src, "foo");
  SetBreakPoint(foo, 0);

  // Stepping through the true part.
  step_action = StepIn;
  break_point_hit_count = 0;
  v8::Handle<v8::Value> argv_true[argc] = { v8::True() };
  foo->Call(env->Global(), argc, argv_true);
  CHECK_EQ(3, break_point_hit_count);

  // Stepping through the false part.
  step_a