Title: Context and IRQ APIs
Description:
This test verifies that the kernel CPU, context and interrupt APIs operate
as expected. It is split into three test suites:
1. context
- test_interrupts exercises irq_lock()/irq_unlock() and irq_offload():
interrupts stay masked while locked and the offloaded ISR runs in
interrupt context.
- test_arch_cpu_irqs_are_enabled checks the arch helper reporting the
current interrupt-enable state.
- test_irq_lock_nested verifies that nested irq_lock()/irq_unlock() only
re-enable interrupts once fully unwound.
- test_k_can_yield reports whether the current context is allowed to
yield.
- test_ctx_thread checks k_current_get() and k_is_in_isr() from both
thread and ISR context.
2. context_one_cpu (single-CPU only)
- test_timer_interrupts confirms the tick timer keeps advancing ticks.
- test_busy_wait validates k_busy_wait() spins for the requested time.
- test_k_sleep checks that k_sleep() blocks for the requested duration.
- test_k_yield and test_ctx_coop_thread exercise k_yield() and
cooperative thread scheduling with k_thread_create().
3. context_cpu_idle
- test_cpu_idle and test_cpu_idle_atomic verify that k_cpu_idle() and
k_cpu_atomic_idle() halt the CPU until the next interrupt wakes it.
---------------------------------------------------------------------------
Building and Running:
Build and run with twister, for example on QEMU:
twister -p qemu_x86 -T tests/kernel/context
Or build and run a single platform directly with west:
west build -b qemu_x86 tests/kernel/context
west build -t run
---------------------------------------------------------------------------
Sample Output:
Running TESTSUITE context
===================================================================
START - test_arch_cpu_irqs_are_enabled
PASS - test_arch_cpu_irqs_are_enabled
===================================================================
START - test_ctx_thread
PASS - test_ctx_thread
===================================================================
START - test_interrupts
PASS - test_interrupts
===================================================================
START - test_irq_lock_nested
PASS - test_irq_lock_nested
===================================================================
START - test_k_can_yield
PASS - test_k_can_yield
===================================================================
TESTSUITE context succeeded
Running TESTSUITE context_cpu_idle
===================================================================
START - test_cpu_idle
PASS - test_cpu_idle
===================================================================
START - test_cpu_idle_atomic
PASS - test_cpu_idle_atomic
===================================================================
TESTSUITE context_cpu_idle succeeded
Running TESTSUITE context_one_cpu
===================================================================
START - test_busy_wait
PASS - test_busy_wait
===================================================================
START - test_ctx_coop_thread
PASS - test_ctx_coop_thread
===================================================================
START - test_k_sleep
PASS - test_k_sleep
===================================================================
START - test_k_yield
PASS - test_k_yield
===================================================================
START - test_timer_interrupts
PASS - test_timer_interrupts
===================================================================
TESTSUITE context_one_cpu succeeded
1538034c97