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C++: Combine the member swap models.

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This commit is contained in:
Geoffrey White
2020-12-08 19:50:13 +00:00
parent 4a81d36309
commit d08efb4e47
1 changed files with 16 additions and 72 deletions
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88
cpp/ql/src/semmle/code/cpp/models/implementations/Swap.qll
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@@ -2,7 +2,10 @@ import semmle.code.cpp.models.interfaces.DataFlow
import semmle.code.cpp.models.interfaces.Taint
/**
* The standard function `swap`.
* The standard function `swap`. A use of `swap` looks like this:
* ```
* std::swap(obj1, obj2)
* ```
*/
private class Swap extends DataFlowFunction {
Swap() { this.hasQualifiedName("std", "swap") }
@@ -17,82 +20,23 @@ private class Swap extends DataFlowFunction {
}
/**
* The standard functions `std::string.swap` and `std::stringstream::swap`.
* A `swap` member function that is used as follows:
* ```
* obj1.swap(obj2)
* ```
*/
private class StdStringSwap extends TaintFunction {
StdStringSwap() {
private class MemberSwap extends TaintFunction {
MemberSwap() {
this.hasQualifiedName("std", "basic_string", "swap") or
this.hasQualifiedName("std", "basic_stringstream", "swap")
this.hasQualifiedName("std", "basic_stringstream", "swap") or
this.hasQualifiedName("std", ["array", "vector", "deque", "list", "forward_list"], "swap") or
this.hasQualifiedName("std", ["set", "unordered_set"], "swap") or
this.hasQualifiedName("std", "pair", "swap") or
this.hasQualifiedName("std", ["map", "unordered_map"], "swap") or
this.hasQualifiedName("std", ["map", "unordered_map"], "swap")
}
override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
// str1.swap(str2)
input.isQualifierObject() and
output.isParameterDeref(0)
or
input.isParameterDeref(0) and
output.isQualifierObject()
}
}
/**
* The standard container `swap` functions.
*/
private class StdSequenceContainerSwap extends TaintFunction {
StdSequenceContainerSwap() {
this.hasQualifiedName("std", ["array", "vector", "deque", "list", "forward_list"], "swap")
}
override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
// container1.swap(container2)
input.isQualifierObject() and
output.isParameterDeref(0)
or
input.isParameterDeref(0) and
output.isQualifierObject()
}
}
/**
* The standard set `swap` functions.
*/
private class StdSetSwap extends TaintFunction {
StdSetSwap() { this.hasQualifiedName("std", ["set", "unordered_set"], "swap") }
override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
// container1.swap(container2)
input.isQualifierObject() and
output.isParameterDeref(0)
or
input.isParameterDeref(0) and
output.isQualifierObject()
}
}
/**
* The standard pair `swap` function.
*/
private class StdPairSwap extends TaintFunction {
StdPairSwap() { this.hasQualifiedName("std", "pair", "swap") }
override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
// container1.swap(container2)
input.isQualifierObject() and
output.isParameterDeref(0)
or
input.isParameterDeref(0) and
output.isQualifierObject()
}
}
/**
* The standard map `swap` function.
*/
private class StdMapSwap extends TaintFunction {
StdMapSwap() { this.hasQualifiedName("std", ["map", "unordered_map"], "swap") }
override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
// container1.swap(container2)
input.isQualifierObject() and
output.isParameterDeref(0)
or