Don't refer to allocation map entry after deallocating it
debugserver's MachTask::DeallocateMemory when removing an
allocate entry from our map (in resposne to an '_m' packet),
copy the size from the entry before removing it from the
map and then using the iterator to fix an ASAN error on
the bots when running TestGdbRemoteMemoryAllocation.py
rdar://76595998
GitOrigin-RevId: 9d4415d01d234efb5dd46bdcbb280c03e12a8101
diff --git a/tools/debugserver/source/MacOSX/MachTask.mm b/tools/debugserver/source/MacOSX/MachTask.mm
index 7c46ec8..767dc59 100644
--- a/tools/debugserver/source/MacOSX/MachTask.mm
+++ b/tools/debugserver/source/MacOSX/MachTask.mm
@@ -984,15 +984,15 @@
allocation_collection::iterator pos, end = m_allocations.end();
for (pos = m_allocations.begin(); pos != end; pos++) {
if ((*pos).first == addr) {
+ size_t size = (*pos).second;
m_allocations.erase(pos);
#define ALWAYS_ZOMBIE_ALLOCATIONS 0
if (ALWAYS_ZOMBIE_ALLOCATIONS ||
getenv("DEBUGSERVER_ZOMBIE_ALLOCATIONS")) {
- ::mach_vm_protect(task, (*pos).first, (*pos).second, 0, VM_PROT_NONE);
+ ::mach_vm_protect(task, addr, size, 0, VM_PROT_NONE);
return true;
} else
- return ::mach_vm_deallocate(task, (*pos).first, (*pos).second) ==
- KERN_SUCCESS;
+ return ::mach_vm_deallocate(task, addr, size) == KERN_SUCCESS;
}
}
return false;