Enabling TLS detects stack overflow in a few tests #53687
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keith-packard
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ok, as #53590 shows, this series now gets all tests passing with TLS enabled, so this series should actually be ready to merge. |
dcpleung
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Jan 11, 2023
Picolibc is enough faster than the minimal C library that the zbus benchmark will likely complete in well under 10ms on qemu_nios2. As this target cannot provide a clock at higher resolution than the system tick, we need to increase that rate to get a non-zero runtime for this benchmark. Add new nios2-specific config variables that change the CONFIG_SYS_CLOCK_TICKS_PER_SEC value, leaving all other platforms using the standard value. We cannot just increase it for every platform as qemu_arc_hs6x fails with a 1kHz rate. Signed-off-by: Keith Packard <[email protected]>
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Enabling TLS increases stack usage by a small amount as that is where any TLS variables are stored. When enabled, this sample ends up overflowing the 512-byte subscriber task stack and the IDLE_STACK_SIZE consumer stacks Replace the fixed 512-byte subscriber stack allocation with CONFIG_MAIN_STACK_SIZE so that it adopts a value controlled by the configuration in case it needs to be adjusted further. Increased CONFIG_IDLE_STACK_SIZE to 1024 to provide more space in each consumer stack. Signed-off-by: Keith Packard <[email protected]>
This test overflows when TLS is used, provide plenty of extra space to avoid that. Signed-off-by: Keith Packard <[email protected]>
When thread local storage is enabled, log_core_additional generates stack overflows in the main thread on several architectures. Increase the stack size to 4096 bytes for this thread. Signed-off-by: Keith Packard <[email protected]>
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Because TLS stores critical thread information at the top of each stack, overflows in subsequent stacks will write over that and cause general chaos. This means that enabling thread local storage will cause some tests to fail simply because they overflow their stacks in a way which was not detected without TLS enabled.
These three patches increase stack sizes in tests (probably by way more than necessary) to make them work when thread local storage is enabled.