[NaCl SDK] Cleanup examples.

native_client_sdk/src/examples/tutorial/debugging/hello_world.c

-/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/** @file hello_world.c
- * This example, is a modified version of hello world.  It will start a second
- * thread and cause that thread to crash via a NULL dereference.
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/c/pp_module.h"
-#include "ppapi/c/pp_var.h"
-#include "ppapi/c/ppb.h"
-#include "ppapi/c/ppb_core.h"
-#include "ppapi/c/ppb_instance.h"
-#include "ppapi/c/ppb_messaging.h"
-#include "ppapi/c/ppb_var.h"
-#include "ppapi/c/ppp.h"
-#include "ppapi/c/ppp_instance.h"
-#include "ppapi/c/ppp_messaging.h"
-
-#include <pthread.h>
-
-#include "error_handling/error_handling.h"
-
-PPB_Messaging* ppb_messaging_interface = NULL;
-PPB_Var* ppb_var_interface = NULL;
-PPB_Core* ppb_core_interface = NULL;
-
-pthread_t g_NexeThread;
-pthread_t g_PPAPIThread;
-PP_Instance g_Instance;
-
-volatile int g_CrashTime = 0;
-
-void PostMessage(const char* str);
-
-void layer5(int x, int y) {
-  if (g_CrashTime) {
-    *(volatile int*)x = y;
-  }
-}
-
-void layer4(int x) { layer5(x, 1); }
-
-void layer3(int a, int b, int c) { layer4(a + b + c); }
-
-void layer2(int i, int j) { layer3(i, j, 7); }
-
-void layer1(int s, int t) {
-  int* junk = (int*)alloca(sizeof(int) * 1234);
-  junk[0] = s + 5;
-  layer2(junk[0], t + 1);
-}
-
-void* NexeMain(void* data) {
-  PostMessage("Running Boom thread.");
-  while (1) {
-    layer1(2, 9);
-  }
-  return NULL;
-}
-
-/**
- * Creates new string PP_Var from C string. The resulting object will be a
- * refcounted string object. It will be AddRef()ed for the caller. When the
- * caller is done with it, it should be Release()d.
- * @param[in] str C string to be converted to PP_Var
- * @return PP_Var containing string.
- */
-static struct PP_Var CStrToVar(const char* str) {
-  if (ppb_var_interface != NULL) {
-    return ppb_var_interface->VarFromUtf8(str, strlen(str));
-  }
-  return PP_MakeUndefined();
-}
-
-static void PostCompletionCallback(void* user_data, int32_t result) {
-  const char* str = (const char*)user_data;
-  ppb_messaging_interface->PostMessage(g_Instance, CStrToVar(str));
-  free(user_data);
-}
-
-void PostMessage(const char* str) {
-  struct PP_CompletionCallback cb;
-
-  if (NULL == str)
-    return;
-  if (NULL == ppb_messaging_interface)
-    return;
-  if (0 == g_Instance)
-    return;
-
-  if (strncmp(str, "ERR:", 4)) {
-    fprintf(stderr, "%s\n", str);
-    fflush(stderr);
-  } else {
-    fprintf(stdout, "%s\n", str);
-    fflush(stdout);
-  }
-
-  /* If on Main Pepper thread, then call interface directly. */
-  if (pthread_self() == g_PPAPIThread) {
-    ppb_messaging_interface->PostMessage(g_Instance, CStrToVar(str));
-    return;
-  }
-
-  /* Otherwise use call on main thread. */
-  cb = PP_MakeCompletionCallback(PostCompletionCallback, strdup(str));
-  ppb_core_interface->CallOnMainThread(0, cb, 0);
-}
-
-void DumpJson(const char* json) {
-  char* out = (char*)malloc(strlen(json) + 5);
-  strcpy(out, "TRC: ");
-  strcat(out, json);
-
-  PostMessage(out);
-  free(out);
-}
-/**
- * Called when the NaCl module is instantiated on the web page. The identifier
- * of the new instance will be passed in as the first argument (this value is
- * generated by the browser and is an opaque handle).  This is called for each
- * instantiation of the NaCl module, which is each time the <embed> tag for
- * this module is encountered.
- *
- * If this function reports a failure (by returning @a PP_FALSE), the NaCl
- * module will be deleted and DidDestroy will be called.
- * @param[in] instance The identifier of the new instance representing this
- *     NaCl module.
- * @param[in] argc The number of arguments contained in @a argn and @a argv.
- * @param[in] argn An array of argument names.  These argument names are
- *     supplied in the <embed> tag, for example:
- *       <embed id="nacl_module" dimensions="2">
- *     will produce two arguments, one named "id" and one named "dimensions".
- * @param[in] argv An array of argument values.  These are the values of the
- *     arguments listed in the <embed> tag.  In the above example, there will
- *     be two elements in this array, "nacl_module" and "2".  The indices of
- *     these values match the indices of the corresponding names in @a argn.
- * @return @a PP_TRUE on success.
- */
-static PP_Bool Instance_DidCreate(PP_Instance instance,
-                                  uint32_t argc,
-                                  const char* argn[],
-                                  const char* argv[]) {
-  g_Instance = instance;
-  g_PPAPIThread = pthread_self();
-
-  PostMessage("LOG: DidCreate");
-
-  /* Request exception callbacks with JSON. */
-  EHRequestExceptionsJson(DumpJson);
-
-  /* Report back if the request was honored. */
-  if (!EHHanderInstalled()) {
-    PostMessage("LOG: Stack traces not available, so don't expect them.\n");
-  } else {
-    PostMessage("LOG: Stack traces are on.");
-  }
-  pthread_create(&g_NexeThread, NULL, NexeMain, NULL);
-  return PP_TRUE;
-}
-
-/**
- * Called when the NaCl module is destroyed. This will always be called,
- * even if DidCreate returned failure. This routine should deallocate any data
- * associated with the instance.
- * @param[in] instance The identifier of the instance representing this NaCl
- *     module.
- */
-static void Instance_DidDestroy(PP_Instance instance) {}
-
-/**
- * Called when the position, the size, or the clip rect of the element in the
- * browser that corresponds to this NaCl module has changed.
- * @param[in] instance The identifier of the instance representing this NaCl
- *     module.
- * @param[in] position The location on the page of this NaCl module. This is
- *     relative to the top left corner of the viewport, which changes as the
- *     page is scrolled.
- * @param[in] clip The visible region of the NaCl module. This is relative to
- *     the top left of the plugin's coordinate system (not the page).  If the
- *     plugin is invisible, @a clip will be (0, 0, 0, 0).
- */
-static void Instance_DidChangeView(PP_Instance instance,
-                                   PP_Resource view_resource) {}
-
-/**
- * Notification that the given NaCl module has gained or lost focus.
- * Having focus means that keyboard events will be sent to the NaCl module
- * represented by @a instance. A NaCl module's default condition is that it
- * will not have focus.
- *
- * Note: clicks on NaCl modules will give focus only if you handle the
- * click event. You signal if you handled it by returning @a true from
- * HandleInputEvent. Otherwise the browser will bubble the event and give
- * focus to the element on the page that actually did end up consuming it.
- * If you're not getting focus, check to make sure you're returning true from
- * the mouse click in HandleInputEvent.
- * @param[in] instance The identifier of the instance representing this NaCl
- *     module.
- * @param[in] has_focus Indicates whether this NaCl module gained or lost
- *     event focus.
- */
-static void Instance_DidChangeFocus(PP_Instance instance, PP_Bool has_focus) {}
-
-/**
- * Handler that gets called after a full-frame module is instantiated based on
- * registered MIME types.  This function is not called on NaCl modules.  This
- * function is essentially a place-holder for the required function pointer in
- * the PPP_Instance structure.
- * @param[in] instance The identifier of the instance representing this NaCl
- *     module.
- * @param[in] url_loader A PP_Resource an open PPB_URLLoader instance.
- * @return PP_FALSE.
- */
-static PP_Bool Instance_HandleDocumentLoad(PP_Instance instance,
-                                           PP_Resource url_loader) {
-  /* NaCl modules do not need to handle the document load function. */
-  return PP_FALSE;
-}
-
-/**
- * Handles message from JavaScript.
- *
- * Any message from JS is a request to cause the main thread to crash.
- */
-static void Messaging_HandleMessage(PP_Instance instance,
-                                    struct PP_Var message) {
-  PostMessage("LOG: Got BOOM");
-  g_CrashTime = 1;
-}
-
-/**
- * Entry points for the module.
- * Initialize needed interfaces: PPB_Core, PPB_Messaging and PPB_Var.
- * @param[in] a_module_id module ID
- * @param[in] get_browser pointer to PPB_GetInterface
- * @return PP_OK on success, any other value on failure.
- */
-PP_EXPORT int32_t PPP_InitializeModule(PP_Module a_module_id,
-                                       PPB_GetInterface get_browser) {
-  ppb_messaging_interface =
-      (PPB_Messaging*)(get_browser(PPB_MESSAGING_INTERFACE));
-  ppb_var_interface = (PPB_Var*)(get_browser(PPB_VAR_INTERFACE));
-  ppb_core_interface = (PPB_Core*)(get_browser(PPB_CORE_INTERFACE));
-  return PP_OK;
-}
-
-/**
- * Returns an interface pointer for the interface of the given name, or NULL
- * if the interface is not supported.
- * @param[in] interface_name name of the interface
- * @return pointer to the interface
- */
-PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
-  if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0) {
-    static PPP_Instance instance_interface = {
-      &Instance_DidCreate,
-      &Instance_DidDestroy,
-      &Instance_DidChangeView,
-      &Instance_DidChangeFocus,
-      &Instance_HandleDocumentLoad,
-    };
-    return &instance_interface;
-  }
-  if (strcmp(interface_name, PPP_MESSAGING_INTERFACE) == 0) {
-    static PPP_Messaging messaging_interface = {
-      &Messaging_HandleMessage,
-    };
-    return &messaging_interface;
-  }
-  return NULL;
-}
-
-/**
- * Called before the plugin module is unloaded.
- */
-PP_EXPORT void PPP_ShutdownModule() {}