Add minimal support for process_utils on iOS

base/process_util_ios.mm

Index: base/process_util_ios.mm
diff --git a/base/process_util_ios.mm b/base/process_util_ios.mm
new file mode 100644
index 0000000000000000000000000000000000000000..6cc4926de85a4b9ed3210ce1552debc7507d0778
--- /dev/null
+++ b/base/process_util_ios.mm
@@ -0,0 +1,96 @@
+// 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.
+
+#include "base/process_util.h"
+
+#import <Foundation/Foundation.h>
+#include <mach/task.h>
+#include <stdio.h>
+
+#include "base/logging.h"
+
+// This is just enough of a shim to let the support needed by test_support
+// link.  In general, process_util isn't valid on iOS.
+
+namespace base {
+
+namespace {
+
+void StackDumpSignalHandler(int signal) {
+  LOG(ERROR) << "Received signal " << signal;
+  NSArray *stack_symbols = [NSThread callStackSymbols];
+  for (NSString* stack_symbol in stack_symbols) {
+    fprintf(stderr, "\t%s\n", [stack_symbol UTF8String]);
+  }
+  _exit(1);
+}
+
+bool GetTaskInfo(task_basic_info_64* task_info_data) {
+  mach_msg_type_number_t count = TASK_BASIC_INFO_64_COUNT;
+  kern_return_t kr = task_info(mach_task_self(),
+                               TASK_BASIC_INFO_64,
+                               reinterpret_cast<task_info_t>(task_info_data),
+                               &count);
+  return kr == KERN_SUCCESS;
+}
+
+}  // namespace
+
+ProcessId GetCurrentProcId() {
+  return getpid();
+}
+
+ProcessHandle GetCurrentProcessHandle() {
+  return GetCurrentProcId();
+}
+
+void EnableTerminationOnHeapCorruption() {
+  // On iOS, there nothing to do AFAIK.
+}
+
+void EnableTerminationOnOutOfMemory() {
+  // iOS provides this for free!
+}
+
+bool EnableInProcessStackDumping() {
+  // When running in an application, our code typically expects SIGPIPE
+  // to be ignored.  Therefore, when testing that same code, it should run
+  // with SIGPIPE ignored as well.
+  struct sigaction action;
+  action.sa_handler = SIG_IGN;
+  action.sa_flags = 0;
+  sigemptyset(&action.sa_mask);
+  bool success = (sigaction(SIGPIPE, &action, NULL) == 0);
+
+  success &= (signal(SIGILL, &StackDumpSignalHandler) != SIG_ERR);
+  success &= (signal(SIGABRT, &StackDumpSignalHandler) != SIG_ERR);
+  success &= (signal(SIGFPE, &StackDumpSignalHandler) != SIG_ERR);
+  success &= (signal(SIGBUS, &StackDumpSignalHandler) != SIG_ERR);
+  success &= (signal(SIGSEGV, &StackDumpSignalHandler) != SIG_ERR);
+  success &= (signal(SIGSYS, &StackDumpSignalHandler) != SIG_ERR);
+
+  return success;
+}
+
+void RaiseProcessToHighPriority() {
+  // Impossible on iOS. Do nothing.
+}
+
+ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
+
+ProcessMetrics::~ProcessMetrics() {}
+
+// static
+ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
+  return new ProcessMetrics(process);
+}
+
+size_t ProcessMetrics::GetWorkingSetSize() const {
+  task_basic_info_64 task_info_data;
+  if (!GetTaskInfo(&task_info_data))
+    return 0;
+  return task_info_data.resident_size;
+}
+
+}  // namespace base