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hvitvedhvitved
authored
Merge pull request #9098 from aschackmull/dataflow/perf
Dataflow: Performance fixes
2 parents cfde0a1 + 4884520 commit 46ab25b

29 files changed

Lines changed: 1740 additions & 203 deletions

‎cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll‎

Lines changed: 60 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1673,10 +1673,24 @@ private module Stage2 {
16731673
storeStepFwd(_, ap, tc, _, _, config)
16741674
}
16751675

1676-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1676+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
16771677
storeStepCand(_, ap, tc, _, _, config)
16781678
}
16791679

1680+
private predicate validAp(Ap ap, Configuration config) {
1681+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
1682+
or
1683+
exists(TypedContent head, Ap tail |
1684+
consCand(head, tail, config) and
1685+
ap = apCons(head, tail)
1686+
)
1687+
}
1688+
1689+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1690+
revConsCand(tc, ap, config) and
1691+
validAp(ap, config)
1692+
}
1693+
16801694
pragma[noinline]
16811695
private predicate parameterFlow(
16821696
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -2495,10 +2509,24 @@ private module Stage3 {
24952509
storeStepFwd(_, ap, tc, _, _, config)
24962510
}
24972511

2498-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2512+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
24992513
storeStepCand(_, ap, tc, _, _, config)
25002514
}
25012515

2516+
private predicate validAp(Ap ap, Configuration config) {
2517+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
2518+
or
2519+
exists(TypedContent head, Ap tail |
2520+
consCand(head, tail, config) and
2521+
ap = apCons(head, tail)
2522+
)
2523+
}
2524+
2525+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2526+
revConsCand(tc, ap, config) and
2527+
validAp(ap, config)
2528+
}
2529+
25022530
pragma[noinline]
25032531
private predicate parameterFlow(
25042532
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3322,10 +3350,24 @@ private module Stage4 {
33223350
storeStepFwd(_, ap, tc, _, _, config)
33233351
}
33243352

3325-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3353+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
33263354
storeStepCand(_, ap, tc, _, _, config)
33273355
}
33283356

3357+
private predicate validAp(Ap ap, Configuration config) {
3358+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
3359+
or
3360+
exists(TypedContent head, Ap tail |
3361+
consCand(head, tail, config) and
3362+
ap = apCons(head, tail)
3363+
)
3364+
}
3365+
3366+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3367+
revConsCand(tc, ap, config) and
3368+
validAp(ap, config)
3369+
}
3370+
33293371
pragma[noinline]
33303372
private predicate parameterFlow(
33313373
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3394,17 +3436,28 @@ private Configuration unbindConf(Configuration conf) {
33943436
exists(Configuration c | result = pragma[only_bind_into](c) and conf = pragma[only_bind_into](c))
33953437
}
33963438

3397-
private predicate nodeMayUseSummary(
3398-
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3439+
pragma[nomagic]
3440+
private predicate nodeMayUseSummary0(
3441+
NodeEx n, DataFlowCallable c, FlowState state, AccessPathApprox apa, Configuration config
33993442
) {
3400-
exists(DataFlowCallable c, AccessPathApprox apa0 |
3401-
Stage4::parameterMayFlowThrough(_, c, apa, _) and
3443+
exists(AccessPathApprox apa0 |
3444+
Stage4::parameterMayFlowThrough(_, c, _, _) and
34023445
Stage4::revFlow(n, state, true, _, apa0, config) and
34033446
Stage4::fwdFlow(n, state, any(CallContextCall ccc), TAccessPathApproxSome(apa), apa0, config) and
34043447
n.getEnclosingCallable() = c
34053448
)
34063449
}
34073450

3451+
pragma[nomagic]
3452+
private predicate nodeMayUseSummary(
3453+
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3454+
) {
3455+
exists(DataFlowCallable c |
3456+
Stage4::parameterMayFlowThrough(_, c, apa, config) and
3457+
nodeMayUseSummary0(n, c, state, apa, config)
3458+
)
3459+
}
3460+
34083461
private newtype TSummaryCtx =
34093462
TSummaryCtxNone() or
34103463
TSummaryCtxSome(ParamNodeEx p, FlowState state, AccessPath ap) {

‎cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll‎

Lines changed: 60 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1673,10 +1673,24 @@ private module Stage2 {
16731673
storeStepFwd(_, ap, tc, _, _, config)
16741674
}
16751675

1676-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1676+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
16771677
storeStepCand(_, ap, tc, _, _, config)
16781678
}
16791679

1680+
private predicate validAp(Ap ap, Configuration config) {
1681+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
1682+
or
1683+
exists(TypedContent head, Ap tail |
1684+
consCand(head, tail, config) and
1685+
ap = apCons(head, tail)
1686+
)
1687+
}
1688+
1689+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1690+
revConsCand(tc, ap, config) and
1691+
validAp(ap, config)
1692+
}
1693+
16801694
pragma[noinline]
16811695
private predicate parameterFlow(
16821696
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -2495,10 +2509,24 @@ private module Stage3 {
24952509
storeStepFwd(_, ap, tc, _, _, config)
24962510
}
24972511

2498-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2512+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
24992513
storeStepCand(_, ap, tc, _, _, config)
25002514
}
25012515

2516+
private predicate validAp(Ap ap, Configuration config) {
2517+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
2518+
or
2519+
exists(TypedContent head, Ap tail |
2520+
consCand(head, tail, config) and
2521+
ap = apCons(head, tail)
2522+
)
2523+
}
2524+
2525+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2526+
revConsCand(tc, ap, config) and
2527+
validAp(ap, config)
2528+
}
2529+
25022530
pragma[noinline]
25032531
private predicate parameterFlow(
25042532
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3322,10 +3350,24 @@ private module Stage4 {
33223350
storeStepFwd(_, ap, tc, _, _, config)
33233351
}
33243352

3325-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3353+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
33263354
storeStepCand(_, ap, tc, _, _, config)
33273355
}
33283356

3357+
private predicate validAp(Ap ap, Configuration config) {
3358+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
3359+
or
3360+
exists(TypedContent head, Ap tail |
3361+
consCand(head, tail, config) and
3362+
ap = apCons(head, tail)
3363+
)
3364+
}
3365+
3366+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3367+
revConsCand(tc, ap, config) and
3368+
validAp(ap, config)
3369+
}
3370+
33293371
pragma[noinline]
33303372
private predicate parameterFlow(
33313373
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3394,17 +3436,28 @@ private Configuration unbindConf(Configuration conf) {
33943436
exists(Configuration c | result = pragma[only_bind_into](c) and conf = pragma[only_bind_into](c))
33953437
}
33963438

3397-
private predicate nodeMayUseSummary(
3398-
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3439+
pragma[nomagic]
3440+
private predicate nodeMayUseSummary0(
3441+
NodeEx n, DataFlowCallable c, FlowState state, AccessPathApprox apa, Configuration config
33993442
) {
3400-
exists(DataFlowCallable c, AccessPathApprox apa0 |
3401-
Stage4::parameterMayFlowThrough(_, c, apa, _) and
3443+
exists(AccessPathApprox apa0 |
3444+
Stage4::parameterMayFlowThrough(_, c, _, _) and
34023445
Stage4::revFlow(n, state, true, _, apa0, config) and
34033446
Stage4::fwdFlow(n, state, any(CallContextCall ccc), TAccessPathApproxSome(apa), apa0, config) and
34043447
n.getEnclosingCallable() = c
34053448
)
34063449
}
34073450

3451+
pragma[nomagic]
3452+
private predicate nodeMayUseSummary(
3453+
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3454+
) {
3455+
exists(DataFlowCallable c |
3456+
Stage4::parameterMayFlowThrough(_, c, apa, config) and
3457+
nodeMayUseSummary0(n, c, state, apa, config)
3458+
)
3459+
}
3460+
34083461
private newtype TSummaryCtx =
34093462
TSummaryCtxNone() or
34103463
TSummaryCtxSome(ParamNodeEx p, FlowState state, AccessPath ap) {

‎cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll‎

Lines changed: 60 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1673,10 +1673,24 @@ private module Stage2 {
16731673
storeStepFwd(_, ap, tc, _, _, config)
16741674
}
16751675

1676-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1676+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
16771677
storeStepCand(_, ap, tc, _, _, config)
16781678
}
16791679

1680+
private predicate validAp(Ap ap, Configuration config) {
1681+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
1682+
or
1683+
exists(TypedContent head, Ap tail |
1684+
consCand(head, tail, config) and
1685+
ap = apCons(head, tail)
1686+
)
1687+
}
1688+
1689+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
1690+
revConsCand(tc, ap, config) and
1691+
validAp(ap, config)
1692+
}
1693+
16801694
pragma[noinline]
16811695
private predicate parameterFlow(
16821696
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -2495,10 +2509,24 @@ private module Stage3 {
24952509
storeStepFwd(_, ap, tc, _, _, config)
24962510
}
24972511

2498-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2512+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
24992513
storeStepCand(_, ap, tc, _, _, config)
25002514
}
25012515

2516+
private predicate validAp(Ap ap, Configuration config) {
2517+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
2518+
or
2519+
exists(TypedContent head, Ap tail |
2520+
consCand(head, tail, config) and
2521+
ap = apCons(head, tail)
2522+
)
2523+
}
2524+
2525+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
2526+
revConsCand(tc, ap, config) and
2527+
validAp(ap, config)
2528+
}
2529+
25022530
pragma[noinline]
25032531
private predicate parameterFlow(
25042532
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3322,10 +3350,24 @@ private module Stage4 {
33223350
storeStepFwd(_, ap, tc, _, _, config)
33233351
}
33243352

3325-
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3353+
private predicate revConsCand(TypedContent tc, Ap ap, Configuration config) {
33263354
storeStepCand(_, ap, tc, _, _, config)
33273355
}
33283356

3357+
private predicate validAp(Ap ap, Configuration config) {
3358+
revFlow(_, _, _, _, ap, config) and ap instanceof ApNil
3359+
or
3360+
exists(TypedContent head, Ap tail |
3361+
consCand(head, tail, config) and
3362+
ap = apCons(head, tail)
3363+
)
3364+
}
3365+
3366+
predicate consCand(TypedContent tc, Ap ap, Configuration config) {
3367+
revConsCand(tc, ap, config) and
3368+
validAp(ap, config)
3369+
}
3370+
33293371
pragma[noinline]
33303372
private predicate parameterFlow(
33313373
ParamNodeEx p, Ap ap, Ap ap0, DataFlowCallable c, Configuration config
@@ -3394,17 +3436,28 @@ private Configuration unbindConf(Configuration conf) {
33943436
exists(Configuration c | result = pragma[only_bind_into](c) and conf = pragma[only_bind_into](c))
33953437
}
33963438

3397-
private predicate nodeMayUseSummary(
3398-
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3439+
pragma[nomagic]
3440+
private predicate nodeMayUseSummary0(
3441+
NodeEx n, DataFlowCallable c, FlowState state, AccessPathApprox apa, Configuration config
33993442
) {
3400-
exists(DataFlowCallable c, AccessPathApprox apa0 |
3401-
Stage4::parameterMayFlowThrough(_, c, apa, _) and
3443+
exists(AccessPathApprox apa0 |
3444+
Stage4::parameterMayFlowThrough(_, c, _, _) and
34023445
Stage4::revFlow(n, state, true, _, apa0, config) and
34033446
Stage4::fwdFlow(n, state, any(CallContextCall ccc), TAccessPathApproxSome(apa), apa0, config) and
34043447
n.getEnclosingCallable() = c
34053448
)
34063449
}
34073450

3451+
pragma[nomagic]
3452+
private predicate nodeMayUseSummary(
3453+
NodeEx n, FlowState state, AccessPathApprox apa, Configuration config
3454+
) {
3455+
exists(DataFlowCallable c |
3456+
Stage4::parameterMayFlowThrough(_, c, apa, config) and
3457+
nodeMayUseSummary0(n, c, state, apa, config)
3458+
)
3459+
}
3460+
34083461
private newtype TSummaryCtx =
34093462
TSummaryCtxNone() or
34103463
TSummaryCtxSome(ParamNodeEx p, FlowState state, AccessPath ap) {

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