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UserspaceEmulator: Exclude special ranges from RangeAllocator
If we do not mark these ranges as reserved, RangeAllocator might later give us addresses that overlap these, which then causes an assertion failure in the SoftMMU. This behavior led to recurring CI failures, and sometimes made programs as simple as `/bin/true` fail. Fixes "Crash 1" reported in #9104
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4 changed files with 20 additions and 3 deletions
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@ -1533,7 +1533,9 @@ u32 Emulator::virt$allocate_tls(FlatPtr initial_data, size_t size)
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// TODO: This matches what Thread::make_thread_specific_region does. The kernel
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// ends up allocating one more page. Figure out if this is intentional.
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auto region_size = align_up_to(size, PAGE_SIZE) + PAGE_SIZE;
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auto tcb_region = make<SimpleRegion>(0x20000000, region_size);
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constexpr auto tls_location = VirtualAddress(0x20000000);
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m_range_allocator.reserve_user_range(tls_location, region_size);
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auto tcb_region = make<SimpleRegion>(tls_location.get(), region_size);
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size_t offset = 0;
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while (size - offset > 0) {
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