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} udebug_task_t;
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} udebug_task_t;
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/** Debugging part of thread_t structure.
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/** Debugging part of thread_t structure.
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 */
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 */
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typedef struct {
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typedef struct {
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    /**
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     * Prevent deadlock with udebug_before_thread_runs() in interrupt
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     * handler, without actually disabling interrupts.
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     * ==0 means "unlocked", >0 means "locked"
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     */
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    atomic_t int_lock;
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    /** Synchronize debug ops on this thread / access to this structure. */
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    /** Synchronize debug ops on this thread / access to this structure. */
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    mutex_t lock;
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    mutex_t lock;
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    waitq_t go_wq;
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    waitq_t go_wq;
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    call_t *go_call;
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    call_t *go_call;