/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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/. */
// This static method initializes sCachedNtDllThunk. Because it's called in // XREMain::XRE_main, which happens long before WindowsProcessLauncher's ctor // accesses sCachedNtDllThunk, there is no race on sCachedNtDllThunk, thus // no mutex is needed. staticvoid CacheNtDllThunk() { if (sCachedNtDllThunk) { return;
}
do {
nt::PEHeaders ourExeImage(::GetModuleHandleW(nullptr)); if (!ourExeImage) { break;
}
nt::PEHeaders ntdllImage(::GetModuleHandleW(L"ntdll.dll")); if (!ntdllImage) { break;
}
Maybe<Range<const uint8_t>> ntdllBoundaries = ntdllImage.GetBounds(); if (!ntdllBoundaries) { break;
}
Maybe<Span<IMAGE_THUNK_DATA>> maybeNtDllThunks =
ourExeImage.GetIATThunksForModule("ntdll.dll", ntdllBoundaries.ptr()); if (maybeNtDllThunks.isNothing()) { break;
}
sCachedNtDllThunk = new Buffer<IMAGE_THUNK_DATA>(maybeNtDllThunks.value()); return;
} while (false);
// Failed to cache IAT. Initializing the variable with nullptr.
sCachedNtDllThunk = new Buffer<IMAGE_THUNK_DATA>();
}
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