lldb/test/API/lang/cpp/class_static/main.cpp

   1 // I made this example after noting that I was unable to display an unsized
   2 // static class array. It turns out that gcc 4.2 will emit DWARF that correctly
   3 // describes the PointType, but it will incorrectly emit debug info for the
   4 // "g_points" array where the following things are wrong:
   5 //  - the DW_TAG_array_type won't have a subrange info
   6 //  - the DW_TAG_variable for "g_points" won't have a valid byte size, so even
   7 //    though we know the size of PointType, we can't infer the actual size
   8 //    of the array by dividing the size of the variable by the number of
   9 //    elements.
  10
  11 #include <stdio.h>
  12
  13 typedef struct PointType
  14 {
  15     int x, y;
  16 } PointType;
  17
  18 class A
  19 {
  20 public:
  21     static PointType g_points[];
  22 };
  23
  24 // Make sure similar names don't confuse us:
  25
  26 class AA
  27 {
  28 public:
  29   static PointType g_points[];
  30 };
  31
  32 PointType A::g_points[] =
  33 {
  34     {    1,    2 },
  35     {   11,   22 }
  36 };
  37 static PointType g_points[] =
  38 {
  39     {    3,    4 },
  40     {   33,   44 }
  41 };
  42
  43 PointType AA::g_points[] =
  44 {
  45     {    5,    6 },
  46     {   55,   66 }
  47 };
  48
  49 int
  50 main (int argc, char const *argv[])
  51 {
  52     const char *hello_world = "Hello, world!";
  53     printf ("A::g_points[1].x = %i\n", A::g_points[1].x); // Set break point at this line.
  54     printf ("AA::g_points[1].x = %i\n", AA::g_points[1].x);
  55     printf ("::g_points[1].x = %i\n", g_points[1].x);
  56     printf ("%s\n", hello_world);
  57     return 0;
  58 }