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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-15 03:34:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-15 03:34:50 +0000 |
commit | def92d1b8e9d373e2f6f27c366d578d97d8960c6 (patch) | |
tree | 2ef34b9ad8bb9a9220e05d60352558b15f513894 /js/src/wasm/WasmFrame.h | |
parent | Adding debian version 125.0.3-1. (diff) | |
download | firefox-def92d1b8e9d373e2f6f27c366d578d97d8960c6.tar.xz firefox-def92d1b8e9d373e2f6f27c366d578d97d8960c6.zip |
Merging upstream version 126.0.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/wasm/WasmFrame.h')
-rw-r--r-- | js/src/wasm/WasmFrame.h | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/js/src/wasm/WasmFrame.h b/js/src/wasm/WasmFrame.h index 23e1c4f49c..a2fdba2b75 100644 --- a/js/src/wasm/WasmFrame.h +++ b/js/src/wasm/WasmFrame.h @@ -346,14 +346,16 @@ static_assert(!std::is_polymorphic_v<Frame>, "Frame doesn't need a vtable."); static_assert(sizeof(Frame) == 2 * sizeof(void*), "Frame is a two pointer structure"); -// Note that sizeof(FrameWithInstances) does not account for ShadowStackSpace. -// Use FrameWithInstances::sizeOf() if you are not incorporating -// ShadowStackSpace through other means (eg the ABIArgIter). - -class FrameWithInstances : public Frame { +class FrameWithShadowStackSpace : public Frame { + protected: // `ShadowStackSpace` bytes will be allocated here on Win64, at higher // addresses than Frame and at lower addresses than the instance fields. + uint8_t shadowStackSpace_[js::jit::ShadowStackSpace]; +}; +class FrameWithInstances + : public std::conditional_t<js::jit::ShadowStackSpace >= 1, + FrameWithShadowStackSpace, Frame> { // The instance area MUST be two pointers exactly. Instance* calleeInstance_; Instance* callerInstance_; @@ -362,21 +364,17 @@ class FrameWithInstances : public Frame { Instance* calleeInstance() { return calleeInstance_; } Instance* callerInstance() { return callerInstance_; } - constexpr static uint32_t sizeOf() { - return sizeof(wasm::FrameWithInstances) + js::jit::ShadowStackSpace; - } - constexpr static uint32_t sizeOfInstanceFields() { - return sizeof(wasm::FrameWithInstances) - sizeof(wasm::Frame); + return sizeof(wasm::FrameWithInstances) - sizeof(wasm::Frame) - + js::jit::ShadowStackSpace; } constexpr static uint32_t sizeOfInstanceFieldsAndShadowStack() { - return sizeOfInstanceFields() + js::jit::ShadowStackSpace; + return sizeof(wasm::FrameWithInstances) - sizeof(wasm::Frame); } constexpr static uint32_t calleeInstanceOffset() { - return offsetof(FrameWithInstances, calleeInstance_) + - js::jit::ShadowStackSpace; + return offsetof(FrameWithInstances, calleeInstance_); } constexpr static uint32_t calleeInstanceOffsetWithoutFrame() { @@ -384,8 +382,7 @@ class FrameWithInstances : public Frame { } constexpr static uint32_t callerInstanceOffset() { - return offsetof(FrameWithInstances, callerInstance_) + - js::jit::ShadowStackSpace; + return offsetof(FrameWithInstances, callerInstance_); } constexpr static uint32_t callerInstanceOffsetWithoutFrame() { |