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swap handling

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lizzie 2025-12-11 05:01:48 +00:00
parent 1c4f568d56
commit bc49a8ca0b
4 changed files with 43 additions and 3 deletions
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1
src/common/host_memory.cpp
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@ -678,6 +678,7 @@ private:
HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_) : backing_size(backing_size_), virtual_size(virtual_size_) {
#ifdef __OPENORBIS__
Common::InitSwap();
LOG_WARNING(HW_Memory, "Platform doesn't support fastmem");
fallback_buffer.emplace(backing_size);
backing_base = fallback_buffer->data();

28
src/common/virtual_buffer.cpp
View file

@ -10,6 +10,10 @@
#include <sys/mman.h>
#endif
#ifdef __OPENORBIS__
#include <csignal>
#endif
#include "common/assert.h"
#include "common/virtual_buffer.h"
#include "common/logging/log.h"
@ -33,7 +37,7 @@ void* AllocateMemoryPages(std::size_t size) noexcept {
void* addr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
ASSERT(addr != nullptr);
#elif defined(__OPENORBIS__)
void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_VOID | MAP_PRIVATE, -1, 0);
ASSERT(addr != MAP_FAILED);
#else
void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
@ -53,4 +57,26 @@ void FreeMemoryPages(void* addr, [[maybe_unused]] std::size_t size) noexcept {
#endif
}
#ifdef __OPENORBIS__
static struct sigaction old_sa_segv;
static void SwapHandler(int sig, siginfo_t* si, void* raw_context) {
void* a_addr = reinterpret_cast<void*>(uintptr_t(si->si_addr) & ~0xfff);
mmap(a_addr, 4096, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
//mprotect(a_addr, 4096, PROT_READ | PROT_WRITE);
}
bool InitSwap() noexcept {
struct sigaction sa;
sa.sa_handler = NULL;
sa.sa_sigaction = &SwapHandler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_SIGINFO | SA_RESTART;
return sigaction(SIGSEGV, &sa, &old_sa_segv) == 0;
}
#else
bool InitSwap() noexcept {
return true;
}
#endif
} // namespace Common

1
src/common/virtual_buffer.h
View file

@ -12,6 +12,7 @@ namespace Common {
void* AllocateMemoryPages(std::size_t size) noexcept;
void FreeMemoryPages(void* base, std::size_t size) noexcept;
bool InitSwap() noexcept;
template <typename T>
class VirtualBuffer final {