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gecko-dev/xpcom/build/PoisonIOInterposerWin.cpp

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C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 ci et: */
/* 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 <algorithm>
#include <stdio.h>
#include <vector>
#include <io.h>
#include <windows.h>
#include <winternl.h>
#include "mozilla/Assertions.h"
#include "mozilla/FileUtilsWin.h"
#include "mozilla/IOInterposer.h"
#include "mozilla/Mutex.h"
#include "mozilla/TimeStamp.h"
#include "nsTArray.h"
#include "nsWindowsDllInterceptor.h"
#include "plstr.h"
#ifdef MOZ_REPLACE_MALLOC
#include "replace_malloc_bridge.h"
#endif
using namespace mozilla;
namespace {
// Keep track of poisoned state. Notice that there is no reason to lock access
// to this variable as it's only changed in InitPoisonIOInterposer and
// ClearPoisonIOInterposer which may only be called on the main-thread when no
// other threads are running.
static bool sIOPoisoned = false;
/************************ Internal NT API Declarations ************************/
/*
* Function pointer declaration for internal NT routine to create/open files.
* For documentation on the NtCreateFile routine, see MSDN.
*/
typedef NTSTATUS (NTAPI* NtCreateFileFn)(
PHANDLE aFileHandle,
ACCESS_MASK aDesiredAccess,
POBJECT_ATTRIBUTES aObjectAttributes,
PIO_STATUS_BLOCK aIoStatusBlock,
PLARGE_INTEGER aAllocationSize,
ULONG aFileAttributes,
ULONG aShareAccess,
ULONG aCreateDisposition,
ULONG aCreateOptions,
PVOID aEaBuffer,
ULONG aEaLength);
/**
* Function pointer declaration for internal NT routine to read data from file.
* For documentation on the NtReadFile routine, see ZwReadFile on MSDN.
*/
typedef NTSTATUS (NTAPI* NtReadFileFn)(
HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
PVOID aBuffer,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey);
/**
* Function pointer declaration for internal NT routine to read data from file.
* No documentation exists, see wine sources for details.
*/
typedef NTSTATUS (NTAPI* NtReadFileScatterFn)(
HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
FILE_SEGMENT_ELEMENT* aSegments,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey);
/**
* Function pointer declaration for internal NT routine to write data to file.
* For documentation on the NtWriteFile routine, see ZwWriteFile on MSDN.
*/
typedef NTSTATUS (NTAPI* NtWriteFileFn)(
HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
PVOID aBuffer,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey);
/**
* Function pointer declaration for internal NT routine to write data to file.
* No documentation exists, see wine sources for details.
*/
typedef NTSTATUS (NTAPI* NtWriteFileGatherFn)(
HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
FILE_SEGMENT_ELEMENT* aSegments,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey);
/**
* Function pointer declaration for internal NT routine to flush to disk.
* For documentation on the NtFlushBuffersFile routine, see ZwFlushBuffersFile
* on MSDN.
*/
typedef NTSTATUS (NTAPI* NtFlushBuffersFileFn)(
HANDLE aFileHandle,
PIO_STATUS_BLOCK aIoStatusBlock);
typedef struct _FILE_NETWORK_OPEN_INFORMATION* PFILE_NETWORK_OPEN_INFORMATION;
/**
* Function pointer delaration for internal NT routine to query file attributes.
* (equivalent to stat)
*/
typedef NTSTATUS (NTAPI* NtQueryFullAttributesFileFn)(
POBJECT_ATTRIBUTES aObjectAttributes,
PFILE_NETWORK_OPEN_INFORMATION aFileInformation);
/*************************** Auxiliary Declarations ***************************/
/**
* RAII class for timing the duration of an I/O call and reporting the result
* to the IOInterposeObserver API.
*/
class WinIOAutoObservation : public IOInterposeObserver::Observation
{
public:
WinIOAutoObservation(IOInterposeObserver::Operation aOp,
HANDLE aFileHandle, const LARGE_INTEGER* aOffset)
: IOInterposeObserver::Observation(
aOp, sReference, !IsDebugFile(reinterpret_cast<intptr_t>(aFileHandle)))
, mFileHandle(aFileHandle)
, mHasQueriedFilename(false)
, mFilename(nullptr)
{
if (mShouldReport) {
mOffset.QuadPart = aOffset ? aOffset->QuadPart : 0;
}
}
WinIOAutoObservation(IOInterposeObserver::Operation aOp, nsAString& aFilename)
: IOInterposeObserver::Observation(aOp, sReference)
, mFileHandle(nullptr)
, mHasQueriedFilename(false)
, mFilename(nullptr)
{
if (mShouldReport) {
nsAutoString dosPath;
if (NtPathToDosPath(aFilename, dosPath)) {
mFilename = ToNewUnicode(dosPath);
mHasQueriedFilename = true;
}
mOffset.QuadPart = 0;
}
}
// Custom implementation of IOInterposeObserver::Observation::Filename
const char16_t* Filename() override;
~WinIOAutoObservation()
{
Report();
if (mFilename) {
MOZ_ASSERT(mHasQueriedFilename);
NS_Free(mFilename);
mFilename = nullptr;
}
}
private:
HANDLE mFileHandle;
LARGE_INTEGER mOffset;
bool mHasQueriedFilename;
char16_t* mFilename;
static const char* sReference;
};
const char* WinIOAutoObservation::sReference = "PoisonIOInterposer";
// Get filename for this observation
const char16_t*
WinIOAutoObservation::Filename()
{
// If mHasQueriedFilename is true, then filename is already stored in mFilename
if (mHasQueriedFilename) {
return mFilename;
}
nsAutoString utf16Filename;
if (HandleToFilename(mFileHandle, mOffset, utf16Filename)) {
// Heap allocate with leakable memory
mFilename = ToNewUnicode(utf16Filename);
}
mHasQueriedFilename = true;
// Return filename
return mFilename;
}
/*************************** IO Interposing Methods ***************************/
// Function pointers to original functions
static NtCreateFileFn gOriginalNtCreateFile;
static NtReadFileFn gOriginalNtReadFile;
static NtReadFileScatterFn gOriginalNtReadFileScatter;
static NtWriteFileFn gOriginalNtWriteFile;
static NtWriteFileGatherFn gOriginalNtWriteFileGather;
static NtFlushBuffersFileFn gOriginalNtFlushBuffersFile;
static NtQueryFullAttributesFileFn gOriginalNtQueryFullAttributesFile;
static NTSTATUS NTAPI
InterposedNtCreateFile(PHANDLE aFileHandle,
ACCESS_MASK aDesiredAccess,
POBJECT_ATTRIBUTES aObjectAttributes,
PIO_STATUS_BLOCK aIoStatusBlock,
PLARGE_INTEGER aAllocationSize,
ULONG aFileAttributes,
ULONG aShareAccess,
ULONG aCreateDisposition,
ULONG aCreateOptions,
PVOID aEaBuffer,
ULONG aEaLength)
{
// Report IO
const wchar_t* buf =
aObjectAttributes ? aObjectAttributes->ObjectName->Buffer : L"";
uint32_t len =
aObjectAttributes ? aObjectAttributes->ObjectName->Length / sizeof(WCHAR) :
0;
nsDependentSubstring filename(buf, len);
WinIOAutoObservation timer(IOInterposeObserver::OpCreateOrOpen, filename);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtCreateFile);
// Execute original function
return gOriginalNtCreateFile(aFileHandle,
aDesiredAccess,
aObjectAttributes,
aIoStatusBlock,
aAllocationSize,
aFileAttributes,
aShareAccess,
aCreateDisposition,
aCreateOptions,
aEaBuffer,
aEaLength);
}
static NTSTATUS NTAPI
InterposedNtReadFile(HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
PVOID aBuffer,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey)
{
// Report IO
WinIOAutoObservation timer(IOInterposeObserver::OpRead, aFileHandle, aOffset);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtReadFile);
// Execute original function
return gOriginalNtReadFile(aFileHandle,
aEvent,
aApc,
aApcCtx,
aIoStatus,
aBuffer,
aLength,
aOffset,
aKey);
}
static NTSTATUS NTAPI
InterposedNtReadFileScatter(HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
FILE_SEGMENT_ELEMENT* aSegments,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey)
{
// Report IO
WinIOAutoObservation timer(IOInterposeObserver::OpRead, aFileHandle, aOffset);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtReadFileScatter);
// Execute original function
return gOriginalNtReadFileScatter(aFileHandle,
aEvent,
aApc,
aApcCtx,
aIoStatus,
aSegments,
aLength,
aOffset,
aKey);
}
// Interposed NtWriteFile function
static NTSTATUS NTAPI
InterposedNtWriteFile(HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
PVOID aBuffer,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey)
{
// Report IO
WinIOAutoObservation timer(IOInterposeObserver::OpWrite, aFileHandle,
aOffset);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtWriteFile);
// Execute original function
return gOriginalNtWriteFile(aFileHandle,
aEvent,
aApc,
aApcCtx,
aIoStatus,
aBuffer,
aLength,
aOffset,
aKey);
}
// Interposed NtWriteFileGather function
static NTSTATUS NTAPI
InterposedNtWriteFileGather(HANDLE aFileHandle,
HANDLE aEvent,
PIO_APC_ROUTINE aApc,
PVOID aApcCtx,
PIO_STATUS_BLOCK aIoStatus,
FILE_SEGMENT_ELEMENT* aSegments,
ULONG aLength,
PLARGE_INTEGER aOffset,
PULONG aKey)
{
// Report IO
WinIOAutoObservation timer(IOInterposeObserver::OpWrite, aFileHandle,
aOffset);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtWriteFileGather);
// Execute original function
return gOriginalNtWriteFileGather(aFileHandle,
aEvent,
aApc,
aApcCtx,
aIoStatus,
aSegments,
aLength,
aOffset,
aKey);
}
static NTSTATUS NTAPI
InterposedNtFlushBuffersFile(HANDLE aFileHandle,
PIO_STATUS_BLOCK aIoStatusBlock)
{
// Report IO
WinIOAutoObservation timer(IOInterposeObserver::OpFSync, aFileHandle,
nullptr);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtFlushBuffersFile);
// Execute original function
return gOriginalNtFlushBuffersFile(aFileHandle,
aIoStatusBlock);
}
static NTSTATUS NTAPI
InterposedNtQueryFullAttributesFile(
POBJECT_ATTRIBUTES aObjectAttributes,
PFILE_NETWORK_OPEN_INFORMATION aFileInformation)
{
// Report IO
const wchar_t* buf =
aObjectAttributes ? aObjectAttributes->ObjectName->Buffer : L"";
uint32_t len =
aObjectAttributes ? aObjectAttributes->ObjectName->Length / sizeof(WCHAR) :
0;
nsDependentSubstring filename(buf, len);
WinIOAutoObservation timer(IOInterposeObserver::OpStat, filename);
// Something is badly wrong if this function is undefined
MOZ_ASSERT(gOriginalNtQueryFullAttributesFile);
// Execute original function
return gOriginalNtQueryFullAttributesFile(aObjectAttributes,
aFileInformation);
}
} // anonymous namespace
/******************************** IO Poisoning ********************************/
// Windows DLL interceptor
static WindowsDllInterceptor sNtDllInterceptor;
namespace mozilla {
void
InitPoisonIOInterposer()
{
// Don't poison twice... as this function may only be invoked on the main
// thread when no other threads are running, it safe to allow multiple calls
// to InitPoisonIOInterposer() without complaining (ie. failing assertions).
if (sIOPoisoned) {
return;
}
sIOPoisoned = 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
// Initialize dll interceptor and add hooks
sNtDllInterceptor.Init("ntdll.dll");
sNtDllInterceptor.AddHook(
"NtCreateFile",
reinterpret_cast<intptr_t>(InterposedNtCreateFile),
reinterpret_cast<void**>(&gOriginalNtCreateFile));
sNtDllInterceptor.AddHook(
"NtReadFile",
reinterpret_cast<intptr_t>(InterposedNtReadFile),
reinterpret_cast<void**>(&gOriginalNtReadFile));
sNtDllInterceptor.AddHook(
"NtReadFileScatter",
reinterpret_cast<intptr_t>(InterposedNtReadFileScatter),
reinterpret_cast<void**>(&gOriginalNtReadFileScatter));
sNtDllInterceptor.AddHook(
"NtWriteFile",
reinterpret_cast<intptr_t>(InterposedNtWriteFile),
reinterpret_cast<void**>(&gOriginalNtWriteFile));
sNtDllInterceptor.AddHook(
"NtWriteFileGather",
reinterpret_cast<intptr_t>(InterposedNtWriteFileGather),
reinterpret_cast<void**>(&gOriginalNtWriteFileGather));
sNtDllInterceptor.AddHook(
"NtFlushBuffersFile",
reinterpret_cast<intptr_t>(InterposedNtFlushBuffersFile),
reinterpret_cast<void**>(&gOriginalNtFlushBuffersFile));
sNtDllInterceptor.AddHook(
"NtQueryFullAttributesFile",
reinterpret_cast<intptr_t>(InterposedNtQueryFullAttributesFile),
reinterpret_cast<void**>(&gOriginalNtQueryFullAttributesFile));
}
void
ClearPoisonIOInterposer()
{
MOZ_ASSERT(false);
if (sIOPoisoned) {
// Destroy the DLL interceptor
sIOPoisoned = false;
sNtDllInterceptor = WindowsDllInterceptor();
}
}
} // namespace mozilla
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