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LJ_FR2: Add support for trace recording and snapshots.

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Contributed by Peter Cawley.
This commit is contained in:
Mike Pall
2016-05-23 01:49:00 +02:00
parent 8f868a9d02
commit 6c8258d74b
11 changed files with 291 additions and 138 deletions
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14
src/lj_jit.h
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@@ -179,14 +179,26 @@ LJ_STATIC_ASSERT(SNAP_CONT == TREF_CONT);
#define SNAP(slot, flags, ref) (((SnapEntry)(slot) << 24) + (flags) + (ref))
#define SNAP_TR(slot, tr) \
(((SnapEntry)(slot) << 24) + ((tr) & (TREF_CONT|TREF_FRAME|TREF_REFMASK)))
#if !LJ_FR2
#define SNAP_MKPC(pc) ((SnapEntry)u32ptr(pc))
#endif
#define SNAP_MKFTSZ(ftsz) ((SnapEntry)(ftsz))
#define snap_ref(sn) ((sn) & 0xffff)
#define snap_slot(sn) ((BCReg)((sn) >> 24))
#define snap_isframe(sn) ((sn) & SNAP_FRAME)
#define snap_pc(sn) ((const BCIns *)(uintptr_t)(sn))
#define snap_setref(sn, ref) (((sn) & (0xffff0000&~SNAP_NORESTORE)) | (ref))
static LJ_AINLINE const BCIns *snap_pc(SnapEntry *sn)
{
#if LJ_FR2
uint64_t pcbase;
memcpy(&pcbase, sn, sizeof(uint64_t));
return (const BCIns *)(pcbase >> 8);
#else
return (const BCIns *)(uintptr_t)*sn;
#endif
}
/* Snapshot and exit numbers. */
typedef uint32_t SnapNo;
typedef uint32_t ExitNo;