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detect when function pointer that is null is used

This commit is contained in:
Daniel Marjamäki 2010-01-23 09:15:30 +01:00
parent 7b986c831d
commit 037ecffc34
2 changed files with 11 additions and 0 deletions
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2
lib/checkother.cpp
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@ -1307,6 +1307,8 @@ private:
dereference(foundError, checks, &tok); dereference(foundError, checks, &tok);
else if (Token::Match(tok.previous(), "return %var% [ %any% ]")) else if (Token::Match(tok.previous(), "return %var% [ %any% ]"))
dereference(foundError, checks, &tok); dereference(foundError, checks, &tok);
else if (Token::Match(&tok, "%var% ("))
dereference(foundError, checks, &tok);
else else
bailOutVar(checks, tok.varId()); bailOutVar(checks, tok.varId());
} }

9
test/testother.cpp
View File

@ -990,6 +990,15 @@ private:
" int sz = sizeof((*(struct dummy *)0).x);\n" " int sz = sizeof((*(struct dummy *)0).x);\n"
"}\n"); "}\n");
ASSERT_EQUALS("", errout.str()); ASSERT_EQUALS("", errout.str());
// function pointer..
checkNullPointer("void foo()\n"
"{\n"
" void (*f)();\n"
" f = 0;\n"
" f();\n"
"}\n");
ASSERT_EQUALS("[test.cpp:5]: (error) Possible null pointer dereference: f\n", errout.str());
} }
void nullpointer7() void nullpointer7()