GC

Functions
static void	_tm_gc_clear_stats ()
	Clear GC stats.
void	_tm_gc_full_type_inner (tm_type *type)
	Force a full GC for a specific type.
void	_tm_gc_full_inner ()
	Force a full GC sequence.
void	tm_gc_full ()
	Force a full GC.

---

Function Documentation

static void _tm_gc_clear_stats

(

)

[static]

Clear GC stats.

Definition at line 1666 of file tm.c.

References tm_data::blocks_allocated_since_gc, tm_data::blocks_in_use_after_gc, tm_data::bytes_allocated_since_gc, tm_data::bytes_in_use_after_gc, tm_data::n, tm_data::nodes_allocated_since_gc, tm_data::nodes_in_use_after_gc, tm, tm_b, tm_B, tm_NU, tm_TOTAL, and tm_WHITE.

Referenced by _tm_gc_full_type_inner().

{
  tm.blocks_allocated_since_gc = 0;
  tm.blocks_in_use_after_gc = tm.n[tm_B];

  tm.nodes_allocated_since_gc = 0;
  tm.nodes_in_use_after_gc = tm.n[tm_NU] = tm.n[tm_TOTAL] - tm.n[tm_WHITE];

  tm.bytes_allocated_since_gc = 0;
  tm.bytes_in_use_after_gc = tm.n[tm_b];
}

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void _tm_gc_full_inner

(

)

Force a full GC sequence.

Definition at line 1749 of file tm.c.

References _tm_gc_full_type_inner().

Referenced by tm_alloc(), and tm_gc_full().

{
  _tm_gc_full_type_inner(0);
}

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void _tm_gc_full_type_inner

(

tm_type *

type

)

Force a full GC for a specific type.

• Unmark all nodes.
• Scan all roots.
• Scan all marked nodes.
• Sweep all unmarked nodes.
• Sweep all unused blocks.

Unmark all marked nodes.

Scan all roots, mark pointers.

Scan all marked nodes.

Sweep the unmarked nodes.

Unmark all marked nodes.

Possibly sweep some blocks.

Start tm_ALLOC phase.

Clear GC stats.

Definition at line 1689 of file tm.c.

References _tm_block_sweep_some(), _tm_gc_clear_stats(), _tm_node_scan_all(), _tm_node_sweep_all(), _tm_node_unmark_all(), _tm_phase_init(), _tm_root_scan_all(), _tm_sweep_is_error, tm_data::n, tm, tm_ALLOC, tm_assert_test, tm_BLACK, tm_ECRU, tm_GREY, tm_msg(), tm_ROOT, tm_SCAN, tm_SWEEP, tm_time_stat_begin(), tm_time_stat_end(), tm_UNMARK, and tm_data::ts_gc_inner.

Referenced by _tm_gc_full_inner().

{
  int try = 0;

  tm_msg("gc {\n");

#if tm_TIME_STAT
  tm_time_stat_begin(&tm.ts_gc_inner);
#endif

  _tm_sweep_is_error = 0;

  /* Try this twice: */
  while ( try ++ < 1 ) {
    /*! Unmark all marked nodes. */
    _tm_phase_init(tm_UNMARK);
    _tm_node_unmark_all();
    tm_assert_test(tm.n[tm_BLACK] == 0);

    /*! Scan all roots, mark pointers. */
    _tm_phase_init(tm_ROOT);
    _tm_root_scan_all();
    
    /*! Scan all marked nodes. */
    _tm_phase_init(tm_SCAN);
    _tm_node_scan_all();
    tm_assert_test(tm.n[tm_GREY] == 0);
    
    /*! Sweep the unmarked nodes. */
    _tm_phase_init(tm_SWEEP);
    _tm_node_sweep_all();
    tm_assert_test(tm.n[tm_ECRU] == 0);
    
    /*! Unmark all marked nodes. */
    _tm_phase_init(tm_UNMARK);
    _tm_node_unmark_all();
    tm_assert_test(tm.n[tm_BLACK] == 0);

    /*! Possibly sweep some blocks. */
    while ( _tm_block_sweep_some() ) {
    }

    /*! Start tm_ALLOC phase. */
    _tm_phase_init(tm_ALLOC);
  }

  /*! Clear GC stats. */
  _tm_gc_clear_stats();

#if tm_TIME_STAT
  tm_time_stat_end(&tm.ts_gc_inner);
#endif

  tm_msg("gc }\n");
}

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void tm_gc_full

(

)

Force a full GC.

May stop world.

Force a full GC.

• Begin timing stats,
• Clear some stack words,
• Remember current stack pointer,
• Save the registers and stack pointers,
• Call "inner" routines,
• End timing stats.

Definition at line 184 of file user.c.

References _tm_clear_some_stack_words, _tm_gc_full_inner(), _tm_set_stack_ptr(), tm_data::inited, tm, tm_init(), tm_time_stat_begin(), tm_time_stat_end(), and tm_data::ts_gc.

{
  void *ptr = 0;

  if ( ! tm.inited ) {
    tm_init(0, (char***) ptr, 0);
  }

#if tm_TIME_STAT
  tm_time_stat_begin(&tm.ts_gc);
#endif

  _tm_clear_some_stack_words();
  _tm_set_stack_ptr(&ptr);

  _tm_gc_full_inner();

#if tm_TIME_STAT
  tm_time_stat_end(&tm.ts_gc);
#endif
}

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