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CPP: Test dataflow through lambdas.

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This commit is contained in:
Geoffrey White
2019-08-15 19:43:24 +01:00
parent 1bd4aeebad
commit a6902bdb37
3 changed files with 51 additions and 0 deletions
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47
cpp/ql/test/library-tests/dataflow/dataflow-tests/lambdas.cpp Normal file
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@@ -0,0 +1,47 @@
int source();
void sink(...) {};
// --- lambdas ---
void test_lambdas()
{
int t = source();
int u = 0;
int v = 0;
int w = 0;
auto a = [t, u]() -> int {
sink(t); // flow from source() [NOT DETECTED]
sink(u);
return t;
};
sink(a()); // flow from source() [NOT DETECTED]
auto b = [&] {
sink(t); // flow from source() [NOT DETECTED]
sink(u);
v = source(); // (v is reference captured)
};
b();
sink(v); // flow from source() [NOT DETECTED]
auto c = [=] {
sink(t); // flow from source() [NOT DETECTED]
sink(u);
};
c();
auto d = [](int a, int b) {
sink(a); // flow from source()
sink(b);
};
d(t, u);
auto e = [](int &a, int &b, int &c) {
sink(a); // flow from source()
sink(b);
c = source();
};
e(t, u, w);
sink(w); // flow from source() [NOT DETECTED]
}

2
cpp/ql/test/library-tests/dataflow/dataflow-tests/test.expected
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@@ -1,4 +1,6 @@
| acrossLinkTargets.cpp:12:8:12:8 | x | acrossLinkTargets.cpp:19:27:19:32 | call to source |
| lambdas.cpp:35:8:35:8 | a | lambdas.cpp:8:10:8:15 | call to source |
| lambdas.cpp:41:8:41:8 | a | lambdas.cpp:8:10:8:15 | call to source |
| test.cpp:7:8:7:9 | t1 | test.cpp:6:12:6:17 | call to source |
| test.cpp:9:8:9:9 | t1 | test.cpp:6:12:6:17 | call to source |
| test.cpp:10:8:10:9 | t2 | test.cpp:6:12:6:17 | call to source |

2
cpp/ql/test/library-tests/dataflow/dataflow-tests/test_diff.expected
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@@ -1,3 +1,5 @@
| lambdas.cpp:8:10:8:15 | lambdas.cpp:35:8:35:8 | AST only |
| lambdas.cpp:8:10:8:15 | lambdas.cpp:41:8:41:8 | AST only |
| test.cpp:89:28:89:34 | test.cpp:92:8:92:14 | IR only |
| test.cpp:100:13:100:18 | test.cpp:103:10:103:12 | AST only |
| test.cpp:109:9:109:14 | test.cpp:110:10:110:12 | IR only |