1 files changed, 0 insertions, 385 deletions
diff --git a/xpcom/build/PoisonIOInterposerMac.cpp b/xpcom/build/PoisonIOInterposerMac.cpp
deleted file mode 100644
index dca9ba0297..0000000000
--- a/xpcom/build/PoisonIOInterposerMac.cpp
+++ /dev/null
@@ -1,385 +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 "PoisonIOInterposer.h"
-#include "mach_override.h"
-
-#include "mozilla/ArrayUtils.h"
-#include "mozilla/Assertions.h"
-#include "mozilla/DebugOnly.h"
-#include "mozilla/IOInterposer.h"
-#include "mozilla/Mutex.h"
-#include "mozilla/ProcessedStack.h"
-#include "mozilla/Telemetry.h"
-#include "mozilla/UniquePtrExtensions.h"
-#include "nsPrintfCString.h"
-#include "mozilla/StackWalk.h"
-#include "nsTraceRefcnt.h"
-#include "plstr.h"
-#include "prio.h"
-
-#include <algorithm>
-#include <vector>
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <aio.h>
-#include <dlfcn.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#ifdef MOZ_REPLACE_MALLOC
-#include "replace_malloc_bridge.h"
-#endif
-
-namespace {
-
-using namespace mozilla;
-
-// Bit tracking if poisoned writes are enabled
-static bool sIsEnabled = false;
-
-// Check if writes are dirty before reporting IO
-static bool sOnlyReportDirtyWrites = false;
-
-// Routines for write validation
-bool IsValidWrite(int aFd, const void* aWbuf, size_t aCount);
-bool IsIPCWrite(int aFd, const struct stat& aBuf);
-
-/******************************** IO AutoTimer ********************************/
-
-/**
- * RAII class for timing the duration of an I/O call and reporting the result
- * to the IOInterposeObserver API.
- */
-class MacIOAutoObservation : public IOInterposeObserver::Observation
-{
-public:
-  MacIOAutoObservation(IOInterposeObserver::Operation aOp, int aFd)
-    : IOInterposeObserver::Observation(aOp, sReference, sIsEnabled &&
-                                       !IsDebugFile(aFd))
-    , mFd(aFd)
-    , mHasQueriedFilename(false)
-    , mFilename(nullptr)
-  {
-  }
-
-  MacIOAutoObservation(IOInterposeObserver::Operation aOp, int aFd,
-                       const void* aBuf, size_t aCount)
-    : IOInterposeObserver::Observation(aOp, sReference, sIsEnabled &&
-                                       !IsDebugFile(aFd) &&
-                                       IsValidWrite(aFd, aBuf, aCount))
-    , mFd(aFd)
-    , mHasQueriedFilename(false)
-    , mFilename(nullptr)
-  {
-  }
-
-  // Custom implementation of IOInterposeObserver::Observation::Filename
-  const char16_t* Filename() override;
-
-  ~MacIOAutoObservation()
-  {
-    Report();
-    if (mFilename) {
-      free(mFilename);
-      mFilename = nullptr;
-    }
-  }
-
-private:
-  int                 mFd;
-  bool                mHasQueriedFilename;
-  char16_t*           mFilename;
-  static const char*  sReference;
-};
-
-const char* MacIOAutoObservation::sReference = "PoisonIOInterposer";
-
-// Get filename for this observation
-const char16_t*
-MacIOAutoObservation::Filename()
-{
-  // If mHasQueriedFilename is true, then we already have it
-  if (mHasQueriedFilename) {
-    return mFilename;
-  }
-  char filename[MAXPATHLEN];
-  if (fcntl(mFd, F_GETPATH, filename) != -1) {
-    mFilename = UTF8ToNewUnicode(nsDependentCString(filename));
-  } else {
-    mFilename = nullptr;
-  }
-  mHasQueriedFilename = true;
-
-  // Return filename
-  return mFilename;
-}
-
-/****************************** Write Validation ******************************/
-
-// We want to detect "actual" writes, not IPC. Some IPC mechanisms are
-// implemented with file descriptors, so filter them out.
-bool
-IsIPCWrite(int aFd, const struct stat& aBuf)
-{
-  if ((aBuf.st_mode & S_IFMT) == S_IFIFO) {
-    return true;
-  }
-
-  if ((aBuf.st_mode & S_IFMT) != S_IFSOCK) {
-    return false;
-  }
-
-  sockaddr_storage address;
-  socklen_t len = sizeof(address);
-  if (getsockname(aFd, (sockaddr*)&address, &len) != 0) {
-    return true; // Ignore the aFd if we can't find what it is.
-  }
-
-  return address.ss_family == AF_UNIX;
-}
-
-// We want to report actual disk IO not things that don't move bits on the disk
-bool
-IsValidWrite(int aFd, const void* aWbuf, size_t aCount)
-{
-  // Ignore writes of zero bytes, Firefox does some during shutdown.
-  if (aCount == 0) {
-    return false;
-  }
-
-  {
-    struct stat buf;
-    int rv = fstat(aFd, &buf);
-    if (rv != 0) {
-      return true;
-    }
-
-    if (IsIPCWrite(aFd, buf)) {
-      return false;
-    }
-  }
-
-  // For writev we pass a nullptr aWbuf. We should only get here from
-  // dbm, and it uses write, so assert that we have aWbuf.
-  if (!aWbuf) {
-    return true;
-  }
-
-  // Break, here if we're allowed to report non-dirty writes
-  if (!sOnlyReportDirtyWrites) {
-    return true;
-  }
-
-  // As a really bad hack, accept writes that don't change the on disk
-  // content. This is needed because dbm doesn't keep track of dirty bits
-  // and can end up writing the same data to disk twice. Once when the
-  // user (nss) asks it to sync and once when closing the database.
-  auto wbuf2 = MakeUniqueFallible<char[]>(aCount);
-  if (!wbuf2) {
-    return true;
-  }
-  off_t pos = lseek(aFd, 0, SEEK_CUR);
-  if (pos == -1) {
-    return true;
-  }
-  ssize_t r = read(aFd, wbuf2.get(), aCount);
-  if (r < 0 || (size_t)r != aCount) {
-    return true;
-  }
-  int cmp = memcmp(aWbuf, wbuf2.get(), aCount);
-  if (cmp != 0) {
-    return true;
-  }
-  off_t pos2 = lseek(aFd, pos, SEEK_SET);
-  if (pos2 != pos) {
-    return true;
-  }
-
-  // Otherwise this is not a valid write
-  return false;
-}
-
-/*************************** Function Interception  ***************************/
-
-/** Structure for declaration of function override */
-struct FuncData
-{
-  const char* Name;      // Name of the function for the ones we use dlsym
-  const void* Wrapper;   // The function that we will replace 'Function' with
-  void* Function;        // The function that will be replaced with 'Wrapper'
-  void* Buffer;          // Will point to the jump buffer that lets us call
-                         // 'Function' after it has been replaced.
-};
-
-// Wrap aio_write. We have not seen it before, so just assert/report it.
-typedef ssize_t (*aio_write_t)(struct aiocb* aAioCbp);
-ssize_t wrap_aio_write(struct aiocb* aAioCbp);
-FuncData aio_write_data = { 0, (void*)wrap_aio_write, (void*)aio_write };
-ssize_t
-wrap_aio_write(struct aiocb* aAioCbp)
-{
-  MacIOAutoObservation timer(IOInterposeObserver::OpWrite,
-                             aAioCbp->aio_fildes);
-
-  aio_write_t old_write = (aio_write_t)aio_write_data.Buffer;
-  return old_write(aAioCbp);
-}
-
-// Wrap pwrite-like functions.
-// We have not seen them before, so just assert/report it.
-typedef ssize_t (*pwrite_t)(int aFd, const void* buf, size_t aNumBytes,
-                            off_t aOffset);
-template<FuncData& foo>
-ssize_t
-wrap_pwrite_temp(int aFd, const void* aBuf, size_t aNumBytes, off_t aOffset)
-{
-  MacIOAutoObservation timer(IOInterposeObserver::OpWrite, aFd);
-  pwrite_t old_write = (pwrite_t)foo.Buffer;
-  return old_write(aFd, aBuf, aNumBytes, aOffset);
-}
-
-// Define a FuncData for a pwrite-like functions.
-#define DEFINE_PWRITE_DATA(X, NAME)                                        \
-FuncData X ## _data = { NAME, (void*) wrap_pwrite_temp<X ## _data> };      \
-
-// This exists everywhere.
-DEFINE_PWRITE_DATA(pwrite, "pwrite")
-// These exist on 32 bit OS X
-DEFINE_PWRITE_DATA(pwrite_NOCANCEL_UNIX2003, "pwrite$NOCANCEL$UNIX2003");
-DEFINE_PWRITE_DATA(pwrite_UNIX2003, "pwrite$UNIX2003");
-// This exists on 64 bit OS X
-DEFINE_PWRITE_DATA(pwrite_NOCANCEL, "pwrite$NOCANCEL");
-
-
-typedef ssize_t (*writev_t)(int aFd, const struct iovec* aIov, int aIovCount);
-template<FuncData& foo>
-ssize_t
-wrap_writev_temp(int aFd, const struct iovec* aIov, int aIovCount)
-{
-  MacIOAutoObservation timer(IOInterposeObserver::OpWrite, aFd, nullptr,
-                             aIovCount);
-  writev_t old_write = (writev_t)foo.Buffer;
-  return old_write(aFd, aIov, aIovCount);
-}
-
-// Define a FuncData for a writev-like functions.
-#define DEFINE_WRITEV_DATA(X, NAME)                                   \
-FuncData X ## _data = { NAME, (void*) wrap_writev_temp<X ## _data> }; \
-
-// This exists everywhere.
-DEFINE_WRITEV_DATA(writev, "writev");
-// These exist on 32 bit OS X
-DEFINE_WRITEV_DATA(writev_NOCANCEL_UNIX2003, "writev$NOCANCEL$UNIX2003");
-DEFINE_WRITEV_DATA(writev_UNIX2003, "writev$UNIX2003");
-// This exists on 64 bit OS X
-DEFINE_WRITEV_DATA(writev_NOCANCEL, "writev$NOCANCEL");
-
-typedef ssize_t (*write_t)(int aFd, const void* aBuf, size_t aCount);
-template<FuncData& foo>
-ssize_t
-wrap_write_temp(int aFd, const void* aBuf, size_t aCount)
-{
-  MacIOAutoObservation timer(IOInterposeObserver::OpWrite, aFd, aBuf, aCount);
-  write_t old_write = (write_t)foo.Buffer;
-  return old_write(aFd, aBuf, aCount);
-}
-
-// Define a FuncData for a write-like functions.
-#define DEFINE_WRITE_DATA(X, NAME)                                   \
-FuncData X ## _data = { NAME, (void*) wrap_write_temp<X ## _data> }; \
-
-// This exists everywhere.
-DEFINE_WRITE_DATA(write, "write");
-// These exist on 32 bit OS X
-DEFINE_WRITE_DATA(write_NOCANCEL_UNIX2003, "write$NOCANCEL$UNIX2003");
-DEFINE_WRITE_DATA(write_UNIX2003, "write$UNIX2003");
-// This exists on 64 bit OS X
-DEFINE_WRITE_DATA(write_NOCANCEL, "write$NOCANCEL");
-
-FuncData* Functions[] = {
-  &aio_write_data,
-
-  &pwrite_data,
-  &pwrite_NOCANCEL_UNIX2003_data,
-  &pwrite_UNIX2003_data,
-  &pwrite_NOCANCEL_data,
-
-  &write_data,
-  &write_NOCANCEL_UNIX2003_data,
-  &write_UNIX2003_data,
-  &write_NOCANCEL_data,
-
-  &writev_data,
-  &writev_NOCANCEL_UNIX2003_data,
-  &writev_UNIX2003_data,
-  &writev_NOCANCEL_data
-};
-
-const int NumFunctions = ArrayLength(Functions);
-
-} // namespace
-
-/******************************** IO Poisoning ********************************/
-
-namespace mozilla {
-
-void
-InitPoisonIOInterposer()
-{
-  // Enable reporting from poisoned write methods
-  sIsEnabled = true;
-
-  // Make sure we only poison writes once!
-  static bool WritesArePoisoned = false;
-  if (WritesArePoisoned) {
-    return;
-  }
-  WritesArePoisoned = true;
-
-  // stdout and stderr are OK.
-  MozillaRegisterDebugFD(1);
-  MozillaRegisterDebugFD(2);
-
-#ifdef MOZ_REPLACE_MALLOC
-  // The contract with InitDebugFd is that the given registry can be used
-  // at any moment, so the instance needs to persist longer than the scope
-  // of this functions.
-  static DebugFdRegistry registry;
-  ReplaceMalloc::InitDebugFd(registry);
-#endif
-
-  for (int i = 0; i < NumFunctions; ++i) {
-    FuncData* d = Functions[i];
-    if (!d->Function) {
-      d->Function = dlsym(RTLD_DEFAULT, d->Name);
-    }
-    if (!d->Function) {
-      continue;
-    }
-    DebugOnly<mach_error_t> t = mach_override_ptr(d->Function, d->Wrapper,
-                                                  &d->Buffer);
-    MOZ_ASSERT(t == err_none);
-  }
-}
-
-void
-OnlyReportDirtyWrites()
-{
-  sOnlyReportDirtyWrites = true;
-}
-
-void
-ClearPoisonIOInterposer()
-{
-  // Not sure how or if we can unpoison the functions. Would be nice, but no
-  // worries we won't need to do this anyway.
-  sIsEnabled = false;
-}
-
-} // namespace mozilla