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Compress snapshots using a simple, extensible 1D-compression.

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Typically reduces storage overhead for snapshot maps by 60%.
The extensible format is a prerequisite for the next redesign steps:
Eliminate IR_FRAME and implement return-to-lower-frame.
This commit is contained in:
Mike Pall
2010-01-26 21:49:04 +01:00
parent e058714a2e
commit 67ca399a30
11 changed files with 366 additions and 320 deletions
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13
src/lj_snap.h
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@@ -14,6 +14,19 @@ LJ_FUNC void lj_snap_add(jit_State *J);
LJ_FUNC void lj_snap_shrink(jit_State *J);
LJ_FUNC void lj_snap_regspmap(uint16_t *rsmap, Trace *T, SnapNo snapno);
LJ_FUNC void lj_snap_restore(jit_State *J, void *exptr);
LJ_FUNC void lj_snap_grow_buf_(jit_State *J, MSize need);
LJ_FUNC void lj_snap_grow_map_(jit_State *J, MSize need);
static LJ_AINLINE void lj_snap_grow_buf(jit_State *J, MSize need)
{
if (LJ_UNLIKELY(need > J->sizesnap)) lj_snap_grow_buf_(J, need);
}
static LJ_AINLINE void lj_snap_grow_map(jit_State *J, MSize need)
{
if (LJ_UNLIKELY(need > J->sizesnapmap)) lj_snap_grow_map_(J, need);
}
#endif
#endif