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swap handling

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lizzie 2025-12-11 05:01:48 +00:00
parent 369e15776b
commit 236b0a7c51
4 changed files with 43 additions and 3 deletions
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28
src/common/virtual_buffer.cpp
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@ -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