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C++: Add mempcpy to MemcpyFunction model class.

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This commit is contained in:
Mathias Vorreiter Pedersen
2021-01-27 18:12:32 +01:00
parent 5aff5c3254
commit aec18e7123
1 changed files with 5 additions and 2 deletions
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7
cpp/ql/src/semmle/code/cpp/models/implementations/Memcpy.qll
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@@ -23,7 +23,8 @@ private class MemcpyFunction extends ArrayFunction, DataFlowFunction, SideEffect
this.hasGlobalOrStdName(["memcpy", "memmove"])
or
// bcopy(src, dest, num)
this.hasGlobalName(["bcopy", "__builtin___memcpy_chk"])
// mempcpy(dest, src, num)
this.hasGlobalName(["bcopy", mempcpy(), "__builtin___memcpy_chk"])
}
/**
@@ -96,7 +97,9 @@ private class MemcpyFunction extends ArrayFunction, DataFlowFunction, SideEffect
}
override predicate parameterIsAlwaysReturned(int index) {
not this.hasGlobalName("bcopy") and
not this.hasGlobalName(["bcopy", mempcpy()]) and
index = getParamDest()
}
}
private string mempcpy() { result = ["mempcpy", "wmempcpy"] }