LCOV - code coverage report
Current view: top level - include/trace - syscall.h (source / functions) Hit Total Coverage
Test: gcov_data_raspi2_real_modules_combined.info Lines: 3 3 100.0 %
Date: 2020-09-30 20:25:40 Functions: 1 1 100.0 %
Branches: 1 2 50.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0 */
       2                 :            : #ifndef _TRACE_SYSCALL_H
       3                 :            : #define _TRACE_SYSCALL_H
       4                 :            : 
       5                 :            : #include <linux/tracepoint.h>
       6                 :            : #include <linux/unistd.h>
       7                 :            : #include <linux/trace_events.h>
       8                 :            : #include <linux/thread_info.h>
       9                 :            : 
      10                 :            : #include <asm/ptrace.h>
      11                 :            : 
      12                 :            : 
      13                 :            : /*
      14                 :            :  * A syscall entry in the ftrace syscalls array.
      15                 :            :  *
      16                 :            :  * @name: name of the syscall
      17                 :            :  * @syscall_nr: number of the syscall
      18                 :            :  * @nb_args: number of parameters it takes
      19                 :            :  * @types: list of types as strings
      20                 :            :  * @args: list of args as strings (args[i] matches types[i])
      21                 :            :  * @enter_fields: list of fields for syscall_enter trace event
      22                 :            :  * @enter_event: associated syscall_enter trace event
      23                 :            :  * @exit_event: associated syscall_exit trace event
      24                 :            :  */
      25                 :            : struct syscall_metadata {
      26                 :            :         const char      *name;
      27                 :            :         int             syscall_nr;
      28                 :            :         int             nb_args;
      29                 :            :         const char      **types;
      30                 :            :         const char      **args;
      31                 :            :         struct list_head enter_fields;
      32                 :            : 
      33                 :            :         struct trace_event_call *enter_event;
      34                 :            :         struct trace_event_call *exit_event;
      35                 :            : };
      36                 :            : 
      37                 :            : #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
      38                 :     201519 : static inline void syscall_tracepoint_update(struct task_struct *p)
      39                 :            : {
      40         [ -  + ]:     201519 :         if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
      41                 :            :                 set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
      42                 :            :         else
      43                 :            :                 clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
      44                 :     201519 : }
      45                 :            : #else
      46                 :            : static inline void syscall_tracepoint_update(struct task_struct *p)
      47                 :            : {
      48                 :            : }
      49                 :            : #endif
      50                 :            : 
      51                 :            : #endif /* _TRACE_SYSCALL_H */

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