/* impl.c.amcss: POOL CLASS AMC STRESS TEST
 *
 * $Id$
 * Copyright (c) 2001 Ravenbrook Limited.
 */

#include "fmtdy.h"
#include "fmtdytst.h"
#include "testlib.h"
#include "mpscamc.h"
#include "mpsavm.h"
#include "mpstd.h"
#ifdef MPS_OS_W3
#include "mpsw3.h"
#endif
#include "mps.h"
#include <stdlib.h>
#include <string.h>


/* These values have been tuned to cause one top-generation collection. */
#define testArenaSIZE     ((size_t)1000*1024)
#define avLEN             3
#define exactRootsCOUNT   200
#define ambigRootsCOUNT   50
#define genCOUNT          2
#define collectionsCOUNT  37
#define rampSIZE          9
#define initTestFREQ      6000

/* testChain -- generation parameters for the test */

static mps_gen_param_s testChain[genCOUNT] = {
  { 150, 0.85 }, { 170, 0.45 } };


/* objNULL needs to be odd so that it's ignored in exactRoots. */
#define objNULL           ((mps_addr_t)0xDECEA5ED)

static mps_pool_t pool;
static mps_ap_t ap;
static mps_addr_t exactRoots[exactRootsCOUNT];
static mps_addr_t ambigRoots[ambigRootsCOUNT];


static void enable(mps_arena_t arena)
{
    mps_message_type_enable(arena, mps_message_type_gc());
}

static void report(mps_arena_t arena)
{
    mps_message_t message;

    while (mps_message_get(&message, arena, mps_message_type_gc())) {
        size_t live, condemned, not_condemned;

        live = mps_message_gc_live_size(arena, message);
        condemned = mps_message_gc_condemned_size(arena, message);
        not_condemned = mps_message_gc_not_condemned_size(arena, message);

        mps_message_discard(arena, message);

        printf("live %lu\n", (unsigned long)live);
        printf("condemned %lu\n", (unsigned long)condemned);
        printf("not_condemned %lu\n", (unsigned long)not_condemned);
    }
}

static mps_addr_t make(void)
{
  size_t length = rnd() % (2*avLEN);
  size_t size = (length+2) * sizeof(mps_word_t);
  mps_addr_t p;
  mps_res_t res;

  do {
    MPS_RESERVE_BLOCK(res, p, ap, size);
    if(res)
      die(res, "MPS_RESERVE_BLOCK");
    res = dylan_init(p, size, exactRoots, exactRootsCOUNT);
    if(res)
      die(res, "dylan_init");
  } while(!mps_commit(ap, p, size));

  return p;
}


static void test_stepper(mps_addr_t object, mps_fmt_t fmt, mps_pool_t pol,
                         void *p, size_t s)
{
  testlib_unused(object); testlib_unused(fmt); testlib_unused(pol);
  testlib_unused(s);
  (*(unsigned long *)p)++;
}


/* test -- the body of the test */

static void *test(void *arg, size_t s)
{
  mps_arena_t arena;
  mps_fmt_t format;
  mps_chain_t chain;
  mps_root_t exactRoot, ambigRoot;
  unsigned long objs; size_t i;
  mps_word_t collections, rampSwitch;
  mps_alloc_pattern_t ramp = mps_alloc_pattern_ramp();
  int ramping;
  mps_ap_t busy_ap;
  mps_addr_t busy_init;

  arena = (mps_arena_t)arg;
  (void)s; /* unused */

  die(dylan_fmt(&format, arena), "fmt_create");
  die(mps_chain_create(&chain, arena, genCOUNT, testChain), "chain_create");

  die(mps_pool_create(&pool, arena, mps_class_amc(), format, chain),
      "pool_create(amc)");

  die(mps_ap_create(&ap, pool, MPS_RANK_EXACT), "BufferCreate");
  die(mps_ap_create(&busy_ap, pool, MPS_RANK_EXACT), "BufferCreate 2");

  for(i = 0; i < exactRootsCOUNT; ++i)
    exactRoots[i] = objNULL;
  for(i = 0; i < ambigRootsCOUNT; ++i)
    ambigRoots[i] = (mps_addr_t)rnd();

  die(mps_root_create_table_masked(&exactRoot, arena,
                                   MPS_RANK_EXACT, (mps_rm_t)0,
                                   &exactRoots[0], exactRootsCOUNT,
                                   (mps_word_t)1),
      "root_create_table(exact)");
  die(mps_root_create_table(&ambigRoot, arena,
                            MPS_RANK_AMBIG, (mps_rm_t)0,
                            &ambigRoots[0], ambigRootsCOUNT),
      "root_create_table(ambig)");

  /* create an ap, and leave it busy */
  die(mps_reserve(&busy_init, busy_ap, 64), "mps_reserve busy");

  collections = 0;
  rampSwitch = rampSIZE;
  mps_ap_alloc_pattern_begin(ap, ramp);
  mps_ap_alloc_pattern_begin(busy_ap, ramp);
  ramping = 1;
  objs = 0;
  while(collections < collectionsCOUNT) {
    unsigned long c;
    size_t r;

    c = mps_collections(arena);

    if(collections != c) {
      collections = c;
      printf("\nCollection %lu, %lu objects.\n",
             c, objs);
      do {
          mps_addr_t p = (mps_addr_t)rnd();
          if (mps_arena_has_addr(arena, p)) {
              printf("0x%08x is in arena\n", (int)p);
              break;
          }
      } while(1);

      report(arena);
      for(r = 0; r < exactRootsCOUNT; ++r)
        cdie(exactRoots[r] == objNULL ||
             (dylan_check(exactRoots[r]) &&
              mps_arena_has_addr(arena, exactRoots[r])),
             "all roots check");
      cdie(!mps_arena_has_addr(arena, NULL),
           "NULL in arena");

      if(collections == collectionsCOUNT / 2) {
        unsigned long object_count = 0;
        mps_arena_park(arena);
	mps_arena_formatted_objects_walk(arena, test_stepper, &object_count, 0);
	mps_arena_release(arena);
	printf("stepped on %lu objects.\n", object_count);
      }
      if(collections == rampSwitch) {
        rampSwitch += rampSIZE;
        if(ramping) {
          mps_ap_alloc_pattern_end(ap, ramp);
          mps_ap_alloc_pattern_end(busy_ap, ramp);
          /* kill half of the roots */
          for(i = 0; i < exactRootsCOUNT; i += 2) {
            if(exactRoots[i] != objNULL) {
              cdie(dylan_check(exactRoots[i]), "ramp kill check");
              exactRoots[i] = objNULL;
            }
          }
          /* Every other time, switch back immediately. */
          if(collections & 1) ramping = 0;
        }
        if(!ramping) {
          mps_ap_alloc_pattern_begin(ap, ramp);
          mps_ap_alloc_pattern_begin(busy_ap, ramp);
          ramping = 1;
        }
      }
    }

    r = (size_t)rnd();
    if(r & 1) {
      i = (r >> 1) % exactRootsCOUNT;
      if(exactRoots[i] != objNULL)
        cdie(dylan_check(exactRoots[i]), "dying root check");
      exactRoots[i] = make();
      if(exactRoots[(exactRootsCOUNT-1) - i] != objNULL)
        dylan_write(exactRoots[(exactRootsCOUNT-1) - i],
                    exactRoots, exactRootsCOUNT);
    } else {
      i = (r >> 1) % ambigRootsCOUNT;
      ambigRoots[(ambigRootsCOUNT-1) - i] = make();
      /* Create random interior pointers */
      ambigRoots[i] = (mps_addr_t)((char *)(ambigRoots[i/2]) + 1);
    }

    if(r % initTestFREQ == 0)
      *(int*)busy_init = -1; /* check that the buffer is still there */

    if(objs % 1024 == 0) {
      putchar('.');
      fflush(stdout);
    }

    ++objs;
  }

  (void)mps_commit(busy_ap, busy_init, 64);
  mps_ap_destroy(busy_ap);
  mps_ap_destroy(ap);
  mps_root_destroy(exactRoot);
  mps_root_destroy(ambigRoot);
  mps_pool_destroy(pool);
  mps_chain_destroy(chain);
  mps_fmt_destroy(format);

  return NULL;
}

int main(int argc, char **argv)
{
  mps_arena_t arena;
  mps_thr_t thread;
  void *r;

  randomize(argc, argv);

  die(mps_arena_create(&arena, mps_arena_class_vm(), 2*testArenaSIZE),
      "arena_create");
  enable(arena);
  die(mps_arena_commit_limit_set(arena, testArenaSIZE), "set limit");
  die(mps_thread_reg(&thread, arena), "thread_reg");
  mps_tramp(&r, test, arena, 0);
  mps_thread_dereg(thread);
  report(arena);
  mps_arena_destroy(arena);

  fflush(stdout); /* synchronize */
  fprintf(stderr, "\nConclusion:  Failed to find any defects.\n");
  return 0;
}