forked from pool/nodejs-electron
Bruno Pitrus
8dd9ce1537
- New upstream release 21.2.1 * Fixed spurious promise rejection in webContents.loadURL when navigating to a hash. * Updated Chromium to 106.0.5249.165. - Add electron-version-from-env.patch to fix build error - Add upstreamable patches fixing various erroneous C++ constructs * ipcz-safe_math-Wuninitialized.patch * passwords_counter-Wsubobject-linkage.patch * static_constructors-Wstrict-aliasing.patch * vector_math_impl-Wstrict-aliasing.patch * webgl_image_conversion-Wstrict-aliasing.patch * xr_cube_map-Wstrict-aliasing.patch OBS-URL: https://build.opensuse.org/request/show/1032854 OBS-URL: https://build.opensuse.org/package/show/devel:languages:nodejs/nodejs-electron?expand=0&rev=45
36 lines
1.9 KiB
Diff
36 lines
1.9 KiB
Diff
Make DEFINE_GLOBAL C++17 compliant.
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The pointer to an object is not interconvertible with the pointer to its underlying storage,
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and GCC raises a Wstrict-aliasing warning about UB resulting from the dereference.
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(This is really a pointer provenance issue, not a type aliasing issue, as the underlying
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void*[] is never actually directly used)
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Additionally, void* potentially has a too-small alignment for some types (eg. long double).
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We fix the fist issue by memory laundering, and the second by switching to aligned_storage_t.
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--- src/third_party/blink/renderer/platform/wtf/static_constructors.h.old 2022-10-20 19:00:30.237477900 +0200
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+++ src/third_party/blink/renderer/platform/wtf/static_constructors.h 2022-10-29 21:48:44.336995700 +0200
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@@ -21,8 +21,11 @@
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_STATIC_CONSTRUCTORS_H_
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#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_STATIC_CONSTRUCTORS_H_
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+#include <new>
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+#include <type_traits>
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+
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// We need to avoid having static constructors. This is accomplished by defining
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-// a static array of the appropriate size and alignment, and defining a const
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+// a buffer of the appropriate size and alignment, and defining a const
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// reference that points to the buffer. During initialization, the object will
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// be constructed with placement new into the buffer. This works with MSVC, GCC,
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// and Clang without producing dynamic initialization code even at -O0. The only
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@@ -33,7 +36,7 @@
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// Use an array of pointers instead of an array of char in case there is some
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// alignment issue.
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#define DEFINE_GLOBAL(type, name) \
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- void* name##Storage[(sizeof(type) + sizeof(void*) - 1) / sizeof(void*)]; \
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- const type& name = *reinterpret_cast<type*>(&name##Storage)
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+ std::aligned_storage_t<sizeof(type), alignof(type)> name##Storage; \
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+ const type& name = *std::launder(reinterpret_cast<type*>(&name##Storage))
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#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_STATIC_CONSTRUCTORS_H_
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