H3cJP/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2026-09-18 02:40:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

MemArenaDarwin: Pass the MAP_MEM_VM_SHARE flag to mach_make_memory_entry_64

Browse Source 
Large anonymous mappings are split into 128 MB chunks. Without MAP_MEM_VM_SHARE,
mach_make_memory_entry_64 will only return an entry spanning the first chunk.
Attempting to map through that entry will fail if it extends beyond the 128 MB
boundary, which can happen when the sizes of MEM1/MEM2 are overridden.
This commit is contained in:
OatmealDome
2026-09-01 22:25:12 -04:00
parent a1e636d72c
commit 27804b4e67
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Source/Core/Common/MemArenaDarwin.cpp
+5 -1
View File
@@ -26,7 +26,11 @@ void MemArena::GrabSHMSegment(size_t size, std::string_view base_name)
}
memory_object_size_t entry_size = size;
constexpr vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE;
// Large anonymous mappings are split into 128 MB chunks. Without MAP_MEM_VM_SHARE,
// mach_make_memory_entry_64 will only return an entry spanning the first chunk.
// Attempting to map through that entry will fail if it extends beyond the 128 MB
// boundary, which can happen when the sizes of MEM1/MEM2 are overridden.
constexpr vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE | MAP_MEM_VM_SHARE;
retval = mach_make_memory_entry_64(mach_task_self(), &entry_size, m_shm_address, prot,
&m_shm_entry, MACH_PORT_NULL);