cross-project-tests/debuginfo-tests/dexter-tests/memvars/ptr-to.c

   1 // XFAIL:*
   2 //// Currently debug info for 'local' behaves, but 'plocal' dereferences to
   3 //// the incorrect value 0xFF after the call to esc.
   4
   5 // REQUIRES: lldb
   6 // UNSUPPORTED: system-windows
   7 // RUN: %dexter --fail-lt 1.0 -w --debugger lldb \
   8 // RUN:     --builder clang-c --cflags "-O2 -glldb" -- %s
   9 //
  10 //// Check that a pointer to a variable living on the stack dereferences to the
  11 //// variable value.
  12
  13 int glob;
  14 __attribute__((__noinline__))
  15 void esc(int* p) {
  16   glob = *p;
  17   *p = 0xFF;
  18 }
  19
  20 int main() {
  21   int local = 0xA;
  22   int *plocal = &local;
  23   esc(plocal);      // DexLabel('s1')
  24   local = 0xB;      //// DSE
  25   return 0;         // DexLabel('s2')
  26 }
  27
  28
  29 // DexExpectWatchValue('local', 0xA, on_line=ref('s1'))
  30 // DexExpectWatchValue('local', 0xB, on_line=ref('s2'))
  31 // DexExpectWatchValue('*plocal', 0xA, on_line=ref('s1'))
  32 // DexExpectWatchValue('*plocal', 0xB, on_line=ref('s2'))
  33 //// Ideally we should be able to observe the dead store to local (0xB) through
  34 //// plocal here.
  35 // DexExpectWatchValue('(local == *plocal)', 'true', from_line=ref('s1'), to_line=ref('s2'))