bolt/test/runtime/iplt.c

   1 // This test checks that the ifuncs works after bolt.
   2 // Compiling with 00 results in IFUNC indirect calling.
   3
   4 // RUN: %clang %cflags -O0 -no-pie %s -fuse-ld=lld \
   5 // RUN:    -o %t.exe -Wl,-q
   6 // RUN: llvm-bolt %t.exe -o %t.bolt.exe --use-old-text=0 --lite=0
   7 // RUN: %t.bolt.exe  | FileCheck %s
   8
   9 // RUN: %clang %cflags -O3 -no-pie %s -fuse-ld=lld \
  10 // RUN:    -o %t.O3.exe -Wl,-q
  11 // RUN: llvm-bolt %t.O3.exe -o %t.O3.bolt.exe --use-old-text=0 --lite=0
  12 // RUN: %t.O3.bolt.exe  | FileCheck %s
  13
  14 // CHECK: foo
  15
  16 #include <stdio.h>
  17 #include <string.h>
  18
  19 static void foo() { printf("foo\n"); }
  20
  21 static void *resolver_foo(void) { return foo; }
  22
  23 __attribute__((ifunc("resolver_foo"))) void ifoo();
  24
  25 static void *resolver_memcpy(void) { return memcpy; }
  26
  27 __attribute__((ifunc("resolver_memcpy"))) void *
  28 imemcpy(void *dest, const void *src, size_t n);
  29
  30 int main() {
  31   int a = 0xdeadbeef, b = 0;
  32   imemcpy(&b, &a, sizeof(b));
  33   if (a != b)
  34     return -1;
  35
  36   ifoo();
  37 }