test/asan/TestCases/Linux/asan_prelink_test.cc

   1 // Test if asan works with prelink.
   2 // It does not actually use prelink, but relies on ld's flag -Ttext-segment
   3 // or gold's flag -Ttext (we try the first flag first, if that fails we
   4 // try the second flag).
   5 //
   6 // RUN: %clangxx_asan -c %s -o %t.o
   7 // RUN: %clangxx_asan -DBUILD_SO=1 -fPIC -shared %s -o %t.so -Wl,-Ttext-segment=0x3600000000 ||\
   8 // RUN: %clangxx_asan -DBUILD_SO=1 -fPIC -shared %s -o %t.so -Wl,-Ttext=0x3600000000
   9 // RUN: %clangxx_asan %t.o %t.so -Wl,-R. -o %t
  10 // RUN: ASAN_OPTIONS=verbosity=1 %t 2>&1 | FileCheck %s
  11
  12 // REQUIRES: x86_64-supported-target, asan-64-bits
  13 #if BUILD_SO
  14 int G;
  15 int *getG() {
  16   return &G;
  17 }
  18 #else
  19 #include <stdio.h>
  20 extern int *getG();
  21 int main(int argc, char **argv) {
  22   long p = (long)getG();
  23   printf("SO mapped at %lx\n", p & ~0xffffffffUL);
  24   *getG() = 0;
  25 }
  26 #endif
  27 // CHECK: 0x003000000000, 0x004fffffffff{{.*}} MidMem
  28 // CHECK: SO mapped at 3600000000