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

   1 // XFAIL:*
   2 //// We don't yet support DW_OP_implicit_pointer in llvm.
   3
   4 // REQUIRES: lldb
   5 // UNSUPPORTED: system-windows
   6 // RUN: %dexter --fail-lt 1.0 -w --debugger lldb \
   7 // RUN:     --builder 'clang-c'  --cflags "-O3 -glldb" -- %s
   8
   9 //// Check that 'param' in 'fun' can be read throughout, and that 'pa' and 'pb'
  10 //// can be dereferenced in the debugger even if we can't provide the pointer
  11 //// value itself.
  12
  13 int globa;
  14 int globb;
  15
  16 //// A no-inline, read-only function with internal linkage is a good candidate
  17 //// for arg promotion.
  18 __attribute__((__noinline__))
  19 static void use_promote(const int* pa) {
  20   //// Promoted args would be a good candidate for an DW_OP_implicit_pointer.
  21   globa = *pa; // DexLabel('s2')
  22 }
  23
  24 __attribute__((__always_inline__))
  25 static void use_inline(const int* pb) {
  26   //// Inlined pointer to callee local would be a good candidate for an
  27   //// DW_OP_implicit_pointer.
  28   globb = *pb; // DexLabel('s3')
  29 }
  30
  31 __attribute__((__noinline__))
  32 int fun(int param) {
  33   volatile int step = 0;   // DexLabel('s1')
  34   use_promote(&param);
  35   use_inline(&param);
  36   return step;             // DexLabel('s4')
  37 }
  38
  39 int main() {
  40   return fun(5);
  41 }
  42
  43 // DexExpectWatchValue('param', 5, from_line=ref('s1'), to_line=ref('s4'))
  44 // DexExpectWatchValue('*pa', 5, on_line=ref('s2'))
  45 // DexExpectWatchValue('*pb', 5, on_line=ref('s3'))