sdcc/support/regression/tests/bug-3135.c

   1 /* bug-3135.c
   2    A stack access overwrote a value held in hl on gbz80.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #pragma disable_warning 283
   8
   9 typedef unsigned char UBYTE;
  10
  11 #define MAX_PROJECTILES 2
  12 #define MAX_ACTIVE_ACTORS 3
  13 #define MAX_ACTORS 4
  14
  15 typedef struct _BankPtr
  16 {
  17   unsigned char bank;
  18   unsigned int offset;
  19 } BankPtr;
  20
  21 typedef struct _PROJECTILE {
  22   UBYTE col_group;
  23 } Projectile;
  24
  25 typedef struct {
  26   BankPtr hit_1_ptr;
  27   BankPtr hit_2_ptr;
  28 } Actor;
  29
  30 Projectile projectiles[MAX_PROJECTILES];
  31 UBYTE actors_active[MAX_ACTIVE_ACTORS];
  32 Actor actors[MAX_ACTORS];
  33
  34 void TestFn2(BankPtr* events_ptr) {
  35   ASSERT (events_ptr->bank == 5 && events_ptr->offset == 0xFC00);
  36 }
  37
  38 void TestFn() {
  39   UBYTE hit;
  40   UBYTE i;
  41
  42   for (i = 0; i != 1; i++) {
  43       hit = actors_active[0];
  44       if (hit != 0xFF) {
  45         if (projectiles[i].col_group == 2) {
  46             TestFn2(&actors[hit].hit_1_ptr);
  47         } else if (projectiles[i].col_group == 4) {
  48             TestFn2(&actors[hit].hit_2_ptr);
  49         }
  50       }
  51   }
  52 }
  53
  54 void
  55 testBug(void)
  56 {
  57   projectiles[0].col_group = 2;
  58   actors_active[0] = 0;
  59   actors[0].hit_1_ptr.bank = 5;
  60   actors[0].hit_1_ptr.offset = 0xFC00;
  61
  62   TestFn();
  63 }
  64