1 files changed, 0 insertions, 225 deletions
diff --git a/xpcom/threads/ThreadStackHelper.cpp b/xpcom/threads/ThreadStackHelper.cpp
deleted file mode 100644
index 72d82e4daa..0000000000
--- a/xpcom/threads/ThreadStackHelper.cpp
+++ /dev/null
@@ -1,225 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "ThreadStackHelper.h"
-#include "MainThreadUtils.h"
-#include "nsJSPrincipals.h"
-#include "nsScriptSecurityManager.h"
-#include "jsfriendapi.h"
-
-#include "mozilla/Assertions.h"
-#include "mozilla/Attributes.h"
-#include "mozilla/IntegerPrintfMacros.h"
-#include "mozilla/Move.h"
-#include "mozilla/Scoped.h"
-#include "mozilla/UniquePtr.h"
-#include "mozilla/MemoryChecking.h"
-#include "mozilla/Sprintf.h"
-
-#ifdef __GNUC__
-# pragma GCC diagnostic push
-# pragma GCC diagnostic ignored "-Wshadow"
-#endif
-
-#if defined(MOZ_VALGRIND)
-# include <valgrind/valgrind.h>
-#endif
-
-#include <string.h>
-#include <vector>
-#include <cstdlib>
-
-#ifdef XP_LINUX
-#include <ucontext.h>
-#include <unistd.h>
-#include <sys/syscall.h>
-#endif
-
-#ifdef __GNUC__
-# pragma GCC diagnostic pop // -Wshadow
-#endif
-
-#if defined(XP_LINUX)
-#include <pthread.h>
-#endif
-
-namespace mozilla {
-
-void
-ThreadStackHelper::Startup()
-{
-#if defined(XP_LINUX)
-  MOZ_ASSERT(NS_IsMainThread());
-  if (!sInitialized) {
-    // TODO: centralize signal number allocation
-    sFillStackSignum = SIGRTMIN + 4;
-    if (sFillStackSignum > SIGRTMAX) {
-      // Leave uninitialized
-      MOZ_ASSERT(false);
-      return;
-    }
-    struct sigaction sigact = {};
-    sigact.sa_sigaction = FillStackHandler;
-    sigemptyset(&sigact.sa_mask);
-    sigact.sa_flags = SA_SIGINFO | SA_RESTART;
-    MOZ_ALWAYS_TRUE(!::sigaction(sFillStackSignum, &sigact, nullptr));
-  }
-  sInitialized++;
-#endif
-}
-
-void
-ThreadStackHelper::Shutdown()
-{
-#if defined(XP_LINUX)
-  MOZ_ASSERT(NS_IsMainThread());
-  if (sInitialized == 1) {
-    struct sigaction sigact = {};
-    sigact.sa_handler = SIG_DFL;
-    MOZ_ALWAYS_TRUE(!::sigaction(sFillStackSignum, &sigact, nullptr));
-  }
-  sInitialized--;
-#endif
-}
-
-ThreadStackHelper::ThreadStackHelper()
-  : mStackToFill(nullptr)
-{
-#if defined(XP_LINUX)
-  MOZ_ALWAYS_TRUE(!::sem_init(&mSem, 0, 0));
-  mThreadID = ::syscall(SYS_gettid);
-#elif defined(XP_WIN)
-  mInitialized = !!::DuplicateHandle(
-    ::GetCurrentProcess(), ::GetCurrentThread(),
-    ::GetCurrentProcess(), &mThreadID,
-    THREAD_SUSPEND_RESUME
-    , FALSE, 0);
-  MOZ_ASSERT(mInitialized);
-#endif
-}
-
-ThreadStackHelper::~ThreadStackHelper()
-{
-#if defined(XP_LINUX)
-  MOZ_ALWAYS_TRUE(!::sem_destroy(&mSem));
-#elif defined(XP_WIN)
-  if (mInitialized) {
-    MOZ_ALWAYS_TRUE(!!::CloseHandle(mThreadID));
-  }
-#endif
-}
-
-namespace {
-template<typename T>
-class ScopedSetPtr
-{
-private:
-  T*& mPtr;
-public:
-  ScopedSetPtr(T*& p, T* val) : mPtr(p) { mPtr = val; }
-  ~ScopedSetPtr() { mPtr = nullptr; }
-};
-} // namespace
-
-void
-ThreadStackHelper::GetStack(Stack& aStack)
-{
-  // Always run PrepareStackBuffer first to clear aStack
-  if (!PrepareStackBuffer(aStack)) {
-    // Skip and return empty aStack
-    return;
-  }
-
-  ScopedSetPtr<Stack> stackPtr(mStackToFill, &aStack);
-
-#if defined(XP_LINUX)
-  if (!sInitialized) {
-    MOZ_ASSERT(false);
-    return;
-  }
-  siginfo_t uinfo = {};
-  uinfo.si_signo = sFillStackSignum;
-  uinfo.si_code = SI_QUEUE;
-  uinfo.si_pid = getpid();
-  uinfo.si_uid = getuid();
-  uinfo.si_value.sival_ptr = this;
-  if (::syscall(SYS_rt_tgsigqueueinfo, uinfo.si_pid,
-                mThreadID, sFillStackSignum, &uinfo)) {
-    // rt_tgsigqueueinfo was added in Linux 2.6.31.
-    // Could have failed because the syscall did not exist.
-    return;
-  }
-  MOZ_ALWAYS_TRUE(!::sem_wait(&mSem));
-
-#elif defined(XP_WIN)
-  if (!mInitialized) {
-    MOZ_ASSERT(false);
-    return;
-  }
-  if (::SuspendThread(mThreadID) == DWORD(-1)) {
-    MOZ_ASSERT(false);
-    return;
-  }
-
-  // SuspendThread is asynchronous, so the thread may still be running. Use
-  // GetThreadContext to ensure it's really suspended.
-  // See https://blogs.msdn.microsoft.com/oldnewthing/20150205-00/?p=44743.
-  CONTEXT context;
-  context.ContextFlags = CONTEXT_CONTROL;
-  if (::GetThreadContext(mThreadID, &context)) {
-    FillStackBuffer();
-    FillThreadContext();
-  }
-
-  MOZ_ALWAYS_TRUE(::ResumeThread(mThreadID) != DWORD(-1));
-#endif
-}
-
-void
-ThreadStackHelper::GetNativeStack(Stack& aStack)
-{
-  /*** STUB ***/
-}
-
-#ifdef XP_LINUX
-
-int ThreadStackHelper::sInitialized;
-int ThreadStackHelper::sFillStackSignum;
-
-void
-ThreadStackHelper::FillStackHandler(int aSignal, siginfo_t* aInfo,
-                                    void* aContext)
-{
-  ThreadStackHelper* const helper =
-    reinterpret_cast<ThreadStackHelper*>(aInfo->si_value.sival_ptr);
-  helper->FillStackBuffer();
-  helper->FillThreadContext(aContext);
-  ::sem_post(&helper->mSem);
-}
-
-#endif // XP_LINUX
-
-bool
-ThreadStackHelper::PrepareStackBuffer(Stack& aStack)
-{
-  // Return false to skip getting the stack and return an empty stack
-  aStack.clear();
-  return false;
-}
-
-void
-ThreadStackHelper::FillStackBuffer()
-{
-  MOZ_ASSERT(mStackToFill->empty());
-  /*** STUB ***/
-}
-
-MOZ_ASAN_BLACKLIST void
-ThreadStackHelper::FillThreadContext(void* aContext)
-{
-  /*** STUB ***/
-}
-
-} // namespace mozilla