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emscripten can't memfd

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lizzie 2026-06-08 23:55:57 +00:00
parent 7bf1ed8ce6
commit 5acadadaa2
2 changed files with 17 additions and 18 deletions
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33
src/common/host_memory.cpp
View file

@ -394,7 +394,7 @@ private:
ankerl::unordered_dense::map<size_t, size_t> placeholder_host_pointers; ///< Placeholder backing offset
};
#elif defined(__OPENORBIS__) || defined(__managarm__)
#elif defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__)
// None of the luxuries of POSIX, all of the suffering
// For managarm: see https://github.com/managarm/managarm/issues/1370
#else // ^^^ Windows ^^^ vvv POSIX vvv
@ -689,7 +689,7 @@ HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_)
: backing_size(backing_size_)
, virtual_size(virtual_size_)
{
#if defined(__OPENORBIS__) || defined(__managarm__)
#if defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__)
LOG_WARNING(HW_Memory, "Platform doesn't support fastmem");
fallback_buffer.emplace(backing_size);
backing_base = fallback_buffer->data();
@ -734,8 +734,13 @@ HostMemory::HostMemory(HostMemory&&) noexcept = default;
HostMemory& HostMemory::operator=(HostMemory&&) noexcept = default;
#if defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__)
void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perms, bool separate_heap) {}
void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap) {}
void HostMemory::Protect(size_t virtual_offset, size_t length, MemoryPermission perm) {}
void HostMemory::EnableDirectMappedAddress() {}
#else
void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perms, bool separate_heap) {
#if !(defined(__OPENORBIS__) || defined(__managarm__))
ASSERT(virtual_offset % PageAlignment == 0);
ASSERT(host_offset % PageAlignment == 0);
ASSERT(length % PageAlignment == 0);
@ -745,11 +750,9 @@ void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length, M
return;
}
impl->Map(virtual_offset + virtual_base_offset, host_offset, length, perms);
#endif
}
void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap) {
#if !(defined(__OPENORBIS__) || defined(__managarm__))
ASSERT(virtual_offset % PageAlignment == 0);
ASSERT(length % PageAlignment == 0);
ASSERT(virtual_offset + length <= virtual_size);
@ -757,11 +760,9 @@ void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap)
return;
}
impl->Unmap(virtual_offset + virtual_base_offset, length);
#endif
}
void HostMemory::Protect(size_t virtual_offset, size_t length, MemoryPermission perm) {
#if !(defined(__OPENORBIS__) || defined(__managarm__))
ASSERT(virtual_offset % PageAlignment == 0);
ASSERT(length % PageAlignment == 0);
ASSERT(virtual_offset + length <= virtual_size);
@ -772,20 +773,18 @@ void HostMemory::Protect(size_t virtual_offset, size_t length, MemoryPermission
const bool write = True(perm & MemoryPermission::Write);
const bool execute = True(perm & MemoryPermission::Execute);
impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute);
#endif
}
void HostMemory::EnableDirectMappedAddress() {
if (impl) {
impl->EnableDirectMappedAddress();
virtual_size += reinterpret_cast<uintptr_t>(virtual_base);
}
}
#endif
void HostMemory::ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value) {
std::memset(backing_base + physical_offset, fill_value, length);
}
void HostMemory::EnableDirectMappedAddress() {
#if !(defined(__OPENORBIS__) || defined(__managarm__))
if (impl) {
impl->EnableDirectMappedAddress();
virtual_size += reinterpret_cast<uintptr_t>(virtual_base);
}
#endif
}
} // namespace Common

2
src/common/host_memory.h
View file

@ -77,7 +77,7 @@ private:
size_t backing_size{};
size_t virtual_size{};
#if !(defined(__OPENORBIS__) || defined(__managarm__))
#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
// Low level handler for the platform dependent memory routines
class Impl;
std::unique_ptr<Impl> impl;