DrSocalkwe3n/luajit
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add shadow frame link stack for trace recorder.

Browse Source 
Simplifies snapshots. Prerequisite for pre-call snapshots.
Increases consistency for fast function calls, too.
This commit is contained in:
Mike Pall
2010-02-04 03:08:29 +01:00
parent 78f5e2ffd3
commit 7256690364
6 changed files with 82 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/lj_opt_loop.c
View File

@@ -167,7 +167,7 @@ static void loop_subst_snap(jit_State *J, SnapShot *osnap,
SnapEntry *loopmap, IRRef1 *subst)
{
SnapEntry *nmap, *omap = &J->cur.snapmap[osnap->mapofs];
MSize nmapofs, nframelinks;
MSize nmapofs, depth;
MSize on, ln, nn, onent = osnap->nent;
BCReg nslots = osnap->nslots;
SnapShot *snap = &J->cur.snap[J->cur.nsnap];
@@ -179,11 +179,11 @@ static void loop_subst_snap(jit_State *J, SnapShot *osnap,
nmapofs = snap->mapofs;
}
J->guardemit.irt = 0;
nframelinks = osnap->nframelinks;
depth = osnap->depth;
/* Setup new snapshot. */
snap->mapofs = (uint16_t)nmapofs;
snap->ref = (IRRef1)J->cur.nins;
snap->nframelinks = (uint8_t)nframelinks;
snap->depth = (uint8_t)depth;
snap->nslots = nslots;
snap->count = 0;
nmap = &J->cur.snapmap[nmapofs];
@@ -205,10 +205,10 @@ static void loop_subst_snap(jit_State *J, SnapShot *osnap,
while (snap_slot(loopmap[ln]) < nslots) /* Copy remaining loop slots. */
nmap[nn++] = loopmap[ln++];
snap->nent = (uint8_t)nn;
J->cur.nsnapmap = (uint16_t)(nmapofs + nn + nframelinks);
J->cur.nsnapmap = (uint16_t)(nmapofs + nn + 1 + depth);
omap += onent;
nmap += nn;
for (nn = 0; nn < nframelinks; nn++) /* Copy frame links. */
for (nn = 0; nn <= depth; nn++) /* Copy PC + frame links. */
nmap[nn] = omap[nn];
}
@@ -314,7 +314,7 @@ static void loop_undo(jit_State *J, IRRef ins, MSize nsnap)
SnapShot *snap = &J->cur.snap[nsnap-1];
SnapEntry *map = J->cur.snapmap;
map[snap->mapofs + snap->nent] = map[J->cur.snap[0].nent]; /* Restore PC. */
J->cur.nsnapmap = (uint16_t)(snap->mapofs + snap->nent + snap->nframelinks);
J->cur.nsnapmap = (uint16_t)(snap->mapofs + snap->nent + 1 + snap->depth);
J->cur.nsnap = nsnap;
J->guardemit.irt = 0;
lj_ir_rollback(J, ins);