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5690759b5c
* We refactor the blocklist code. Code that may possibly run before initialization of the Win32 subsystem and the CRT is contained within the `freestanding` library. * The `freestanding` library's static initializers are placed in their own section so that they may be manually invoked separately from the remaining initializers in the binary. * `CheckBlockInfo` and `IsDllAllowed` are modified to return a `BlockAction` enum instead of a `bool`. This will be used more extensively in the future for LSP blocking. * The launcher process now hooks `LdrLoadDll` in addition to `NtMapViewOfSection`. This is necessary so that we can collect timing information. * Telemetry recorders must implement the `LoaderObserver` interface. * `ModuleLoadFrame` is a RAII class that collects the information about the DLL load and dispatches the information to `LoaderObserver`s. * The launcher process exposes an implementation of the `LoaderAPI` interface that may be called by either the launcher process blocklist or the legacy blocklist in `mozglue`. * During startup, the launcher process implements its own `LoaderObserver`. Once mozglue is running, it connects its `LoaderObserver` to the launcher process, receives a vector containing the module load events, and then stores and forwards them into XUL. Depends on D43155 Differential Revision: https://phabricator.services.mozilla.com/D43156 --HG-- rename : browser/app/winlauncher/DllBlocklistWin.cpp => browser/app/winlauncher/DllBlocklistInit.cpp rename : browser/app/winlauncher/DllBlocklistWin.h => browser/app/winlauncher/DllBlocklistInit.h rename : browser/app/winlauncher/DllBlocklistWin.cpp => browser/app/winlauncher/freestanding/DllBlocklist.cpp rename : browser/app/winlauncher/DllBlocklistWin.h => browser/app/winlauncher/freestanding/DllBlocklist.h rename : browser/app/winlauncher/moz.build => browser/app/winlauncher/freestanding/moz.build extra : moz-landing-system : lando
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#include "mozilla/LoaderAPIInterfaces.h"
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#include "freestanding/LoaderPrivateAPI.h"
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#if defined(_MSC_VER)
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# include <intrin.h>
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# pragma intrinsic(_ReturnAddress)
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# define RETURN_ADDRESS() _ReturnAddress()
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#elif defined(__GNUC__) || defined(__clang__)
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# define RETURN_ADDRESS() \
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__builtin_extract_return_addr(__builtin_return_address(0))
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#endif
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static bool CheckForMozglue(void* aReturnAddress) {
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HMODULE callingModule;
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if (!::GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
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GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
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reinterpret_cast<LPCWSTR>(aReturnAddress),
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&callingModule)) {
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return false;
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}
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return callingModule && callingModule == ::GetModuleHandleW(L"mozglue.dll");
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}
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namespace mozilla {
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extern "C" MOZ_EXPORT nt::LoaderAPI* GetNtLoaderAPI(
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nt::LoaderObserver* aNewObserver) {
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const bool isCallerMozglue = CheckForMozglue(RETURN_ADDRESS());
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MOZ_ASSERT(isCallerMozglue);
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if (!isCallerMozglue) {
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return nullptr;
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}
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freestanding::EnsureInitialized();
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freestanding::LoaderPrivateAPI& api = freestanding::gLoaderPrivateAPI;
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api.SetObserver(aNewObserver);
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return &api;
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}
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} // namespace mozilla
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