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host_memory: Support staged VirtualProtect calls

master
ReinUsesLisp 2021-06-06 20:53:26 +07:00 committed by Markus Wick
parent 5ba28325b2
commit ee67460ff0
1 changed files with 12 additions and 3 deletions
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15
src/common/host_memory.cpp
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@ -110,9 +110,18 @@ public:
} else { } else {
UNIMPLEMENTED_MSG("Protection flag combination read={} write={}", read, write); UNIMPLEMENTED_MSG("Protection flag combination read={} write={}", read, write);
} }
DWORD old_flags{}; const size_t virtual_end = virtual_offset + length;
if (!VirtualProtect(virtual_base + virtual_offset, length, new_flags, &old_flags)) {
LOG_CRITICAL(HW_Memory, "Failed to change virtual memory protect rules"); std::lock_guard lock{placeholder_mutex};
auto [it, end] = placeholders.equal_range({virtual_offset, virtual_end});
while (it != end) {
const size_t offset = std::max(it->lower(), virtual_offset);
const size_t protect_length = std::min(it->upper(), virtual_end) - offset;
DWORD old_flags{};
if (!VirtualProtect(virtual_base + offset, protect_length, new_flags, &old_flags)) {
LOG_CRITICAL(HW_Memory, "Failed to change virtual memory protect rules");
}
++it;
} }
} }