1 files changed, 0 insertions, 104 deletions
diff --git a/chromium/base/profiler/thread_delegate_mac.cc b/chromium/base/profiler/thread_delegate_mac.cc
deleted file mode 100644
index 7632c4efed5..00000000000
--- a/chromium/base/profiler/thread_delegate_mac.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2019 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/profiler/thread_delegate_mac.h"
-
-#include <mach/mach.h>
-#include <mach/thread_act.h>
-#include <pthread.h>
-
-#include "base/logging.h"
-#include "base/mac/mach_logging.h"
-#include "base/profiler/profile_builder.h"
-
-// IMPORTANT NOTE: Some functions within this implementation are invoked while
-// the target thread is suspended so it must not do any allocation from the
-// heap, including indirectly via use of DCHECK/CHECK or other logging
-// statements. Otherwise this code can deadlock on heap locks acquired by the
-// target thread before it was suspended. These functions are commented with "NO
-// HEAP ALLOCATIONS".
-
-namespace base {
-
-namespace {
-
-// Fills |state| with |target_thread|'s context. NO HEAP ALLOCATIONS.
-bool GetThreadState(thread_act_t target_thread, x86_thread_state64_t* state) {
-  auto count = static_cast<mach_msg_type_number_t>(x86_THREAD_STATE64_COUNT);
-  return thread_get_state(target_thread, x86_THREAD_STATE64,
-                          reinterpret_cast<thread_state_t>(state),
-                          &count) == KERN_SUCCESS;
-}
-
-}  // namespace
-
-// ScopedSuspendThread --------------------------------------------------------
-
-// NO HEAP ALLOCATIONS after thread_suspend.
-ThreadDelegateMac::ScopedSuspendThread::ScopedSuspendThread(
-    mach_port_t thread_port)
-    : thread_port_(thread_suspend(thread_port) == KERN_SUCCESS
-                       ? thread_port
-                       : MACH_PORT_NULL) {}
-
-// NO HEAP ALLOCATIONS. The MACH_CHECK is OK because it provides a more noisy
-// failure mode than deadlocking.
-ThreadDelegateMac::ScopedSuspendThread::~ScopedSuspendThread() {
-  if (!WasSuccessful())
-    return;
-
-  kern_return_t kr = thread_resume(thread_port_);
-  MACH_CHECK(kr == KERN_SUCCESS, kr) << "thread_resume";
-}
-
-bool ThreadDelegateMac::ScopedSuspendThread::WasSuccessful() const {
-  return thread_port_ != MACH_PORT_NULL;
-}
-
-// ThreadDelegateMac ----------------------------------------------------------
-
-ThreadDelegateMac::ThreadDelegateMac(mach_port_t thread_port)
-    : thread_port_(thread_port),
-      thread_stack_base_address_(reinterpret_cast<uintptr_t>(
-          pthread_get_stackaddr_np(pthread_from_mach_thread_np(thread_port)))) {
-  // This class suspends threads, and those threads might be suspended in dyld.
-  // Therefore, for all the system functions that might be linked in dynamically
-  // that are used while threads are suspended, make calls to them to make sure
-  // that they are linked up.
-  x86_thread_state64_t thread_state;
-  GetThreadState(thread_port_, &thread_state);
-}
-
-ThreadDelegateMac::~ThreadDelegateMac() = default;
-
-std::unique_ptr<ThreadDelegate::ScopedSuspendThread>
-ThreadDelegateMac::CreateScopedSuspendThread() {
-  return std::make_unique<ScopedSuspendThread>(thread_port_);
-}
-
-// NO HEAP ALLOCATIONS.
-bool ThreadDelegateMac::GetThreadContext(x86_thread_state64_t* thread_context) {
-  return GetThreadState(thread_port_, thread_context);
-}
-
-// NO HEAP ALLOCATIONS.
-uintptr_t ThreadDelegateMac::GetStackBaseAddress() const {
-  return thread_stack_base_address_;
-}
-
-// NO HEAP ALLOCATIONS.
-bool ThreadDelegateMac::CanCopyStack(uintptr_t stack_pointer) {
-  return true;
-}
-
-std::vector<uintptr_t*> ThreadDelegateMac::GetRegistersToRewrite(
-    x86_thread_state64_t* thread_context) {
-  return {
-      &AsUintPtr(&thread_context->__rbx), &AsUintPtr(&thread_context->__rbp),
-      &AsUintPtr(&thread_context->__rsp), &AsUintPtr(&thread_context->__r12),
-      &AsUintPtr(&thread_context->__r13), &AsUintPtr(&thread_context->__r14),
-      &AsUintPtr(&thread_context->__r15)};
-}
-
-}  // namespace base