fix(extensions): define platform info to prevent renderer crash

BUILD.gn

@@ -642,6 +642,7 @@ source_set("electron_lib") {
       "shell/common/extensions/api",
       "shell/common/extensions/api:extensions_features",
       "//chrome/browser/resources:component_extension_resources",
+      "//components/update_client:update_client",
       "//components/zoom",
       "//extensions/browser",
       "//extensions/browser:core_api_provider",

docs/api/extensions.md

@@ -74,6 +74,7 @@ The following methods of `chrome.runtime` are supported:
 
 - `chrome.runtime.getBackgroundPage`
 - `chrome.runtime.getManifest`
+- `chrome.runtime.getPlatformInfo`
 - `chrome.runtime.getURL`
 - `chrome.runtime.connect`
 - `chrome.runtime.sendMessage`

shell/browser/extensions/api/runtime/electron_runtime_api_delegate.cc

@@ -7,6 +7,7 @@
 #include <string>
 
 #include "build/build_config.h"
+#include "components/update_client/update_query_params.h"
 #include "extensions/common/api/runtime.h"
 #include "shell/browser/extensions/electron_extension_system.h"
 
@@ -42,10 +43,57 @@ bool ElectronRuntimeAPIDelegate::CheckForUpdates(
 void ElectronRuntimeAPIDelegate::OpenURL(const GURL& uninstall_url) {}
 
 bool ElectronRuntimeAPIDelegate::GetPlatformInfo(PlatformInfo* info) {
-  // TODO(nornagon): put useful information here.
-#if defined(OS_LINUX)
-  info->os = api::runtime::PLATFORM_OS_LINUX;
-#endif
+  const char* os = update_client::UpdateQueryParams::GetOS();
+  if (strcmp(os, "mac") == 0) {
+    info->os = extensions::api::runtime::PLATFORM_OS_MAC;
+  } else if (strcmp(os, "win") == 0) {
+    info->os = extensions::api::runtime::PLATFORM_OS_WIN;
+  } else if (strcmp(os, "linux") == 0) {
+    info->os = extensions::api::runtime::PLATFORM_OS_LINUX;
+  } else if (strcmp(os, "openbsd") == 0) {
+    info->os = extensions::api::runtime::PLATFORM_OS_OPENBSD;
+  } else {
+    NOTREACHED();
+    return false;
+  }
+
+  const char* arch = update_client::UpdateQueryParams::GetArch();
+  if (strcmp(arch, "arm") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_ARM;
+  } else if (strcmp(arch, "arm64") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_ARM64;
+  } else if (strcmp(arch, "x86") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_X86_32;
+  } else if (strcmp(arch, "x64") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_X86_64;
+  } else if (strcmp(arch, "mipsel") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_MIPS;
+  } else if (strcmp(arch, "mips64el") == 0) {
+    info->arch = extensions::api::runtime::PLATFORM_ARCH_MIPS64;
+  } else {
+    NOTREACHED();
+    return false;
+  }
+
+  const char* nacl_arch = update_client::UpdateQueryParams::GetNaclArch();
+  if (strcmp(nacl_arch, "arm") == 0) {
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_ARM;
+  } else if (strcmp(nacl_arch, "arm64") == 0) {
+    // Use ARM for ARM64 NaCl, as ARM64 NaCl is not available.
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_ARM;
+  } else if (strcmp(nacl_arch, "x86-32") == 0) {
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_X86_32;
+  } else if (strcmp(nacl_arch, "x86-64") == 0) {
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_X86_64;
+  } else if (strcmp(nacl_arch, "mips32") == 0) {
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_MIPS;
+  } else if (strcmp(nacl_arch, "mips64") == 0) {
+    info->nacl_arch = extensions::api::runtime::PLATFORM_NACL_ARCH_MIPS64;
+  } else {
+    NOTREACHED();
+    return false;
+  }
+
   return true;
 }  // namespace extensions
 

spec-main/extensions-spec.ts

@@ -184,28 +184,38 @@ describe('chrome extensions', () => {
   });
 
   describe('chrome.runtime', () => {
-    let content: any;
-    before(async () => {
+    let w: BrowserWindow;
+    const exec = async (name: string) => {
+      const p = emittedOnce(ipcMain, 'success');
+      await w.webContents.executeJavaScript(`exec('${name}')`);
+      const [, result] = await p;
+      return result;
+    };
+    beforeEach(async () => {
       const customSession = session.fromPartition(`persist:${require('uuid').v4()}`);
       await customSession.loadExtension(path.join(fixtures, 'extensions', 'chrome-runtime'));
-      const w = new BrowserWindow({ show: false, webPreferences: { session: customSession } });
-      try {
-        w.loadURL(url);
-        await emittedOnce(w.webContents, 'dom-ready');
-        content = JSON.parse(await w.webContents.executeJavaScript('document.documentElement.textContent'));
-        expect(content).to.be.an('object');
-      } finally {
-        w.destroy();
-      }
+      w = new BrowserWindow({ show: false, webPreferences: { session: customSession, nodeIntegration: true } });
+      w.loadURL(url);
+      await emittedOnce(w.webContents, 'dom-ready');
+    });
+    it('getManifest()', async () => {
+      const result = await exec('getManifest');
+      expect(result).to.be.an('object').with.property('name', 'chrome-runtime');
     });
-    it('getManifest()', () => {
-      expect(content.manifest).to.be.an('object').with.property('name', 'chrome-runtime');
+    it('id', async () => {
+      const result = await exec('id');
+      expect(result).to.be.a('string').with.lengthOf(32);
     });
-    it('id', () => {
-      expect(content.id).to.be.a('string').with.lengthOf(32);
+    it('getURL()', async () => {
+      const result = await exec('getURL');
+      expect(result).to.be.a('string').and.match(/^chrome-extension:\/\/.*main.js$/);
     });
-    it('getURL()', () => {
-      expect(content.url).to.be.a('string').and.match(/^chrome-extension:\/\/.*main.js$/);
+    it('getPlatformInfo()', async () => {
+      const result = await exec('getPlatformInfo');
+      expect(result).to.be.an('object');
+      expect(result.os).to.be.a('string');
+      expect(result.arch).to.be.a('string');
+      expect(result.nacl_arch).to.be.a('string');
     });
   });
 

spec-main/fixtures/extensions/chrome-runtime/background.js

@@ -0,0 +1,12 @@
+/* global chrome */
+
+chrome.runtime.onMessage.addListener((message, sender, reply) => {
+  switch (message) {
+    case 'getPlatformInfo':
+      chrome.runtime.getPlatformInfo(reply);
+      break;
+  }
+
+  // Respond asynchronously
+  return true;
+});

spec-main/fixtures/extensions/chrome-runtime/main.js

@@ -1,6 +1,39 @@
 /* eslint-disable */
-document.documentElement.textContent = JSON.stringify({
-  manifest: chrome.runtime.getManifest(),
-  id: chrome.runtime.id,
-  url: chrome.runtime.getURL('main.js')
+
+function evalInMainWorld(fn) {
+  const script = document.createElement('script')
+  script.textContent = `((${fn})())`
+  document.documentElement.appendChild(script)
+}
+
+async function exec(name) {
+  let result
+  switch (name) {
+    case 'getManifest':
+      result = chrome.runtime.getManifest()
+      break
+    case 'id':
+      result = chrome.runtime.id
+      break
+    case 'getURL':
+      result = chrome.runtime.getURL('main.js')
+      break
+    case 'getPlatformInfo': {
+      result = await new Promise(resolve => {
+        chrome.runtime.sendMessage(name, resolve)
+      })
+      break
+    }
+  }
+
+  const funcStr = `() => { require('electron').ipcRenderer.send('success', ${JSON.stringify(result)}) }`
+  evalInMainWorld(funcStr)
+}
+
+window.addEventListener('message', event => {
+  exec(event.data.name)
+})
+
+evalInMainWorld(() => {
+  window.exec = name => window.postMessage({ name })
 })

spec-main/fixtures/extensions/chrome-runtime/manifest.json

@@ -8,5 +8,9 @@
       "run_at": "document_end"
     }
   ],
+  "background": {
+    "scripts": ["background.js"],
+    "persistent": false
+  },
   "manifest_version": 2
 }