C++: Add failing test.

Author: MathiasVP

cpp/ql/test/library-tests/dataflow/taint-tests/localTaint.expected

@@ -6629,6 +6629,19 @@ WARNING: Module TaintTracking has been deprecated and may be removed in future (
 | taint.cpp:720:27:720:32 | source | taint.cpp:720:20:720:25 | call to strtok | TAINT |
 | taint.cpp:721:8:721:16 | tokenized | taint.cpp:721:7:721:16 | * ... | TAINT |
 | taint.cpp:722:8:722:12 | delim | taint.cpp:722:7:722:12 | * ... | TAINT |
+| taint.cpp:727:24:727:29 | source | taint.cpp:727:24:727:29 | source |  |
+| taint.cpp:727:24:727:29 | source | taint.cpp:729:18:729:23 | source |  |
+| taint.cpp:728:17:728:23 | 0 | taint.cpp:729:27:729:32 | endptr |  |
+| taint.cpp:728:17:728:23 | 0 | taint.cpp:731:7:731:12 | endptr |  |
+| taint.cpp:728:17:728:23 | 0 | taint.cpp:732:8:732:13 | endptr |  |
+| taint.cpp:729:11:729:16 | call to strtol | taint.cpp:730:7:730:7 | l |  |
+| taint.cpp:729:18:729:23 | source | taint.cpp:729:11:729:16 | call to strtol | TAINT |
+| taint.cpp:729:26:729:32 | ref arg & ... | taint.cpp:729:27:729:32 | endptr [inner post update] |  |
+| taint.cpp:729:26:729:32 | ref arg & ... | taint.cpp:731:7:731:12 | endptr |  |
+| taint.cpp:729:26:729:32 | ref arg & ... | taint.cpp:732:8:732:13 | endptr |  |
+| taint.cpp:729:27:729:32 | endptr | taint.cpp:729:26:729:32 | & ... |  |
+| taint.cpp:731:7:731:12 | ref arg endptr | taint.cpp:732:8:732:13 | endptr |  |
+| taint.cpp:732:8:732:13 | endptr | taint.cpp:732:7:732:13 | * ... | TAINT |
 | vector.cpp:16:43:16:49 | source1 | vector.cpp:17:26:17:32 | source1 |  |
 | vector.cpp:16:43:16:49 | source1 | vector.cpp:31:38:31:44 | source1 |  |
 | vector.cpp:17:21:17:33 | call to vector | vector.cpp:19:14:19:14 | v |  |

cpp/ql/test/library-tests/dataflow/taint-tests/taint.cpp

@@ -720,4 +720,14 @@ void test_strtok_indirect() {
 	char* tokenized = strtok(source, delim);
 	sink(*tokenized); // $ ir MISSING: ast
 	sink(*delim);
+}
+
+long int strtol(const char*, char**, int);
+
+void test_strtol(char *source) {
+	char* endptr = nullptr;
+	long l = strtol(source, &endptr, 10);
+	sink(l); // $ ast,ir
+	sink(endptr); // $ MISSING: ast,ir
+	sink(*endptr); // $ MISSING: ast,ir
 }