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LibELF: Add a small local-exec TLS test

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Part 1 of this test uses a large array so we are more likely getting
segfaults when using an incorrect TLS layout.

The `volatile`s and `taint_for_optimiter`s should hopefully prevent the
compiler from optimizing the tests out.
This commit is contained in:
Sönke Holz 2024-04-17 21:54:39 +02:00 • committed by Andrew Kaster
parent 9437b29b43
commit 9881d10e38
Notes: sideshowbarker 2024-07-17 16:23:06 +09:00
1 changed files with 23 additions and 0 deletions
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23
Tests/LibELF/TestTLS.cpp
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@ -14,3 +14,26 @@ TEST_CASE(basic)
{
run_test();
}
TEST_CASE(local_exec)
{
[[gnu::tls_model("local-exec")]] static volatile __thread char test1[PAGE_SIZE * 4 + 10];
for (size_t i = 0; i < sizeof(test1); i++) {
test1[i] = static_cast<char>(i);
AK::taint_for_optimizer(test1[i]);
}
for (size_t i = 0; i < sizeof(test1); i++) {
AK::taint_for_optimizer(test1[i]);
EXPECT_EQ(test1[i], static_cast<char>(i));
}
[[gnu::tls_model("local-exec")]] static volatile __thread u16 test2[] = { 0x1234, 0x5678, 0xabcd };
AK::taint_for_optimizer(test2[0]);
EXPECT_EQ(test2[0], 0x1234);
AK::taint_for_optimizer(test2[1]);
EXPECT_EQ(test2[1], 0x5678);
AK::taint_for_optimizer(test2[2]);
EXPECT_EQ(test2[2], 0xabcd);
}