unit-tests/test-cases/dtrace-old-probes/main.c

   1
   2 #include <stdio.h>
   3
   4 #define DTRACE_STRINGIFY(s) #s
   5 #define DTRACE_TOSTRING(s) DTRACE_STRINGIFY(s)
   6
   7 #define DTRACE_NOPS                     \
   8         "nop"                   "\n\t"  \
   9         "nop"                   "\n\t"  \
  10         "nop"                   "\n\t"
  11
  12
  13 #define DTRACE_LAB(p, n)                \
  14    "__dtrace_probe$" DTRACE_TOSTRING(%=__LINE__) DTRACE_STRINGIFY(_##p##___##n)
  15
  16 #if (defined __x86_64__ || defined __arm64__)
  17 #define DTRACE_LABEL(p, n)              \
  18       ".section __DATA, __data\n\t"     \
  19       ".globl " DTRACE_LAB(p, n) "\n\t" \
  20       DTRACE_LAB(p, n) ":" ".quad 1f""\n\t"    \
  21        ".text" "\n\t"                   \
  22         "1:"
  23 #else
  24 #define DTRACE_LABEL(p, n)              \
  25       ".section __DATA, __data\n\t"     \
  26       ".globl " DTRACE_LAB(p, n) "\n\t" \
  27        DTRACE_LAB(p, n) ":\n\t" ".long 1f""\n\t"        \
  28        ".text" "\n\t"                   \
  29         "1:"
  30 #endif
  31
  32 #define DTRACE_CALL(p,n)        \
  33         DTRACE_LABEL(p,n)       \
  34         DTRACE_NOPS
  35
  36 #define DTRACE_CALL0ARGS(provider, name)                                                        \
  37         __asm volatile (                                                                                \
  38                       DTRACE_CALL(provider, name)                                               \
  39                       :                                                                         \
  40                       :                                                                         \
  41         );
  42
  43 int deadwood()
  44 {
  45         DTRACE_CALL0ARGS(__foo__, test2)
  46         return 0;
  47 }
  48
  49
  50 int main() {
  51         int a = 1;
  52
  53         while(a) {
  54                 DTRACE_CALL0ARGS(__foo__, test1)
  55         }
  56
  57         return 0;
  58 }