ld64/unit-tests/test-cases/data-in-code/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 #define DTRACE_LABEL(p, n)              \
  17       ".section __DATA, __data\n\t"     \
  18       ".globl " DTRACE_LAB(p, n) "\n\t" \
  19        DTRACE_LAB(p, n) ":\n\t" ".long 1f""\n\t"        \
  20        ".text" "\n\t"                   \
  21         "1:"
  22
  23 #define DTRACE_CALL(p,n)        \
  24         DTRACE_LABEL(p,n)       \
  25         DTRACE_NOPS
  26
  27 #define DTRACE_CALL0ARGS(provider, name)                                                        \
  28         __asm volatile (                                                                                \
  29                       DTRACE_CALL(provider, name)                                               \
  30                       :                                                                         \
  31                       :                                                                         \
  32         );
  33
  34 int deadwood()
  35 {
  36         DTRACE_CALL0ARGS(__foo__, test2)
  37         return 0;
  38 }
  39
  40
  41 int main() {
  42         int a = 1;
  43
  44         while(a) {
  45                 DTRACE_CALL0ARGS(__foo__, test1)
  46         }
  47
  48         return 0;
  49 }