runtime/runtime.h

   1 /* main header file
   2  * Copyright (C) 2005-2008 Red Hat Inc.
   3  * Copyright (C) 2005, 2006 Intel Corporation.
   4  *
   5  * This file is part of systemtap, and is free software.  You can
   6  * redistribute it and/or modify it under the terms of the GNU General
   7  * Public License (GPL); either version 2, or (at your option) any
   8  * later version.
   9  */
  10
  11 #ifndef _RUNTIME_H_
  12 #define _RUNTIME_H_
  13
  14 #include <linux/module.h>
  15 #include <linux/ctype.h>
  16 #include <linux/kernel.h>
  17 #include <linux/miscdevice.h>
  18 #include <linux/init.h>
  19 #include <linux/hash.h>
  20 #include <linux/string.h>
  21 #include <linux/kprobes.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/time.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/hardirq.h>
  27 #include <asm/uaccess.h>
  28 #include <linux/kallsyms.h>
  29 #include <linux/version.h>
  30 #include <linux/compat.h>
  31 #include <linux/mm.h>
  32
  33 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15)
  34 #if !defined (CONFIG_DEBUG_FS)  && !defined (CONFIG_DEBUG_FS_MODULE)
  35 #error "DebugFS is required and was not found in the kernel."
  36 #endif
  37 #else
  38 /* older kernels have no debugfs and older version of relayfs. */
  39 #define STP_OLD_TRANSPORT
  40 #endif
  41
  42 #ifndef for_each_cpu
  43 #define for_each_cpu(cpu)  for_each_cpu_mask((cpu), cpu_possible_map)
  44 #endif
  45
  46 static void _stp_dbug (const char *func, int line, const char *fmt, ...);
  47 void _stp_error (const char *fmt, ...);
  48
  49 #include "debug.h"
  50
  51 /* atomic globals */
  52 static atomic_t _stp_transport_failures = ATOMIC_INIT (0);
  53
  54 static struct
  55 {
  56         atomic_t ____cacheline_aligned_in_smp seq;
  57 } _stp_seq = { ATOMIC_INIT (0) };
  58
  59 #define _stp_seq_inc() (atomic_inc_return(&_stp_seq.seq))
  60
  61 /* TEST_MODE is always defined by systemtap */
  62 #ifdef TEST_MODE
  63 #define SYSTEMTAP 1
  64 #else
  65 #define MAXTRYLOCK 1000
  66 #define TRYLOCKDELAY 100
  67 #endif
  68
  69 #ifndef MAXSTRINGLEN
  70 #define MAXSTRINGLEN 128
  71 #endif
  72
  73 #include "alloc.c"
  74 #include "print.c"
  75 #include "string.c"
  76 #include "io.c"
  77 #include "arith.c"
  78 #include "copy.c"
  79 #include "sym.c"
  80 #ifdef STP_PERFMON
  81 #include "perf.c"
  82 #endif
  83
  84 /* Support functions for int64_t module parameters. */
  85 int param_set_int64_t(const char *val, struct kernel_param *kp)
  86 {
  87   char *endp;
  88   long long ll;
  89
  90   if (!val)
  91     return -EINVAL;
  92
  93   /* simple_strtoll isn't exported... */
  94   if (*val == '-')
  95     ll = -simple_strtoull(val+1, &endp, 0);
  96   else
  97     ll = simple_strtoull(val, &endp, 0);
  98
  99   if ((endp == val) || ((int64_t)ll != ll))
 100     return -EINVAL;
 101
 102   *((int64_t *)kp->arg) = ll;
 103   return 0;
 104 }
 105
 106 int param_get_int64_t(char *buffer, struct kernel_param *kp)
 107 {
 108   return sprintf(buffer, "%lli", (long long)*((int64_t *)kp->arg));
 109 }
 110
 111 #define param_check_int64_t(name, p) __param_check(name, p, int64_t)
 112
 113
 114 /************* Module Stuff ********************/
 115
 116 int init_module (void)
 117 {
 118   return _stp_transport_init();
 119 }
 120
 121 int probe_start(void);
 122
 123 void cleanup_module(void)
 124 {
 125   _stp_transport_close();
 126 }
 127
 128 MODULE_LICENSE("GPL");
 129
 130 #endif /* _RUNTIME_H_ */