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d60635cb9d
This closes the race window between Processor::current() and a context switch happening before in_irq().
37 lines
910 B
C++
37 lines
910 B
C++
/*
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* Copyright (c) 2021, Patrick Meyer <git@the-space.agency>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/KCOVDevice.h>
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#include <Kernel/Thread.h>
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extern bool g_in_early_boot;
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extern "C" {
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void __sanitizer_cov_trace_pc(void);
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void __sanitizer_cov_trace_pc(void)
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{
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if (g_in_early_boot) [[unlikely]]
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return;
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if (Processor::current_in_irq()) [[unlikely]] {
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// Do not trace in interrupts.
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return;
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}
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auto thread = Thread::current();
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auto tid = thread->tid();
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auto maybe_kcov_instance = KCOVDevice::thread_instance->get(tid);
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if (!maybe_kcov_instance.has_value()) [[likely]] {
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// not traced
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return;
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}
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auto kcov_instance = maybe_kcov_instance.value();
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if (kcov_instance->state < KCOVInstance::TRACING) [[likely]]
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return;
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kcov_instance->buffer_add_pc((u64)__builtin_return_address(0));
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}
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}
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