Lightemerald/windows-user-space-emulator
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Implement more efficient export logging

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Unicorn hooks are expensive. It seems to iterate all hooks every
time an instruction is executed. Therefore more hooks -> slower execution.

Instead, we'll have one hook. Within that hook we'll check if the address
is within a mapped binary. If so, we then check if it is and export and
log when true. That's far more efficient than checking all hooks every time.
This commit is contained in:
momo5502
2024-09-08 16:08:31 +02:00
parent 9c5b65b103
commit 01b1d422d9
5 changed files with 73 additions and 53 deletions
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12
src/windows_emulator/syscalls.cpp
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@@ -298,7 +298,7 @@ namespace
{
if (fs_information_class != FileFsDeviceInformation)
{
printf("Unsupported process info class: %X\n", fs_information_class);
printf("Unsupported fs info class: %X\n", fs_information_class);
c.emu.stop();
return STATUS_NOT_SUPPORTED;
}
@@ -396,8 +396,8 @@ namespace
return STATUS_INVALID_HANDLE;
}
const auto binary = map_file(c.emu, section_entry->name);
if (!binary.has_value())
const auto binary = map_file(c.proc, c.emu, section_entry->name);
if (!binary)
{
return STATUS_FILE_INVALID;
}
@@ -491,7 +491,7 @@ namespace
return STATUS_BUFFER_OVERFLOW;
}
if (!is_within_start_and_length(base_address, c.proc.ntdll.image_base, c.proc.ntdll.size_of_image))
if (!is_within_start_and_length(base_address, c.proc.ntdll->image_base, c.proc.ntdll->size_of_image))
{
puts("Bad image request");
c.emu.stop();
@@ -502,8 +502,8 @@ namespace
info.access([&](MEMORY_IMAGE_INFORMATION& image_info)
{
image_info.ImageBase = reinterpret_cast<void*>(c.proc.ntdll.image_base);
image_info.SizeOfImage = c.proc.ntdll.size_of_image;
image_info.ImageBase = reinterpret_cast<void*>(c.proc.ntdll->image_base);
image_info.SizeOfImage = c.proc.ntdll->size_of_image;
});
return STATUS_SUCCESS;