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Merge pull request #4427 from wwylele/query-memory-merge

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SVC: QueryMemory merges similar VMA
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Weiyi Wang 2018-11-19 11:10:15 -05:00 committed by GitHub
commit 803f783f07
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1 changed files with 21 additions and 4 deletions
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25
src/core/hle/kernel/svc.cpp
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@ -1066,10 +1066,27 @@ ResultCode SVC::QueryProcessMemory(MemoryInfo* memory_info, PageInfo* page_info,
if (vma == process->vm_manager.vma_map.end())
return ERR_INVALID_ADDRESS;
memory_info->base_address = vma->second.base;
memory_info->permission = static_cast<u32>(vma->second.permissions);
memory_info->size = vma->second.size;
memory_info->state = static_cast<u32>(vma->second.meminfo_state);
auto permissions = vma->second.permissions;
auto state = vma->second.meminfo_state;
// Query(Process)Memory merges vma with neighbours when they share the same state and
// permissions, regardless of their physical mapping.
auto mismatch = [permissions, state](const std::pair<VAddr, Kernel::VirtualMemoryArea>& v) {
return v.second.permissions != permissions || v.second.meminfo_state != state;
};
std::reverse_iterator rvma(vma);
auto lower = std::find_if(rvma, process->vm_manager.vma_map.crend(), mismatch);
--lower;
auto upper = std::find_if(vma, process->vm_manager.vma_map.cend(), mismatch);
--upper;
memory_info->base_address = lower->second.base;
memory_info->permission = static_cast<u32>(permissions);
memory_info->size = upper->second.base + upper->second.size - lower->second.base;
memory_info->state = static_cast<u32>(state);
page_info->flags = 0;
LOG_TRACE(Kernel_SVC, "called process=0x{:08X} addr=0x{:08X}", process_handle, addr);