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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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4
src/lj_gdbjit.c
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@@ -698,8 +698,8 @@ void lj_gdbjit_addtrace(jit_State *J, Trace *T, TraceNo traceno)
lua_State *L = J->L;
GCproto *pt = &gcref(T->startpt)->pt;
TraceNo parent = T->ir[REF_BASE].op1;
uintptr_t pcofs = (uintptr_t)(T->snap[0].mapofs+T->snap[0].nslots);
const BCIns *startpc = (const BCIns *)(uintptr_t)T->snapmap[pcofs];
uintptr_t pcofs = (uintptr_t)(T->snap[0].mapofs+T->snap[0].nent);
const BCIns *startpc = snap_pc(T->snapmap[pcofs]);
ctx.T = T;
ctx.mcaddr = (uintptr_t)T->mcode;
ctx.szmcode = T->szmcode;