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Bug hunting; Ensure there is warning after unknown variable expression

This commit is contained in:
Daniel Marjamäki 2020-12-06 10:13:10 +01:00
parent 1c6ff9aa2b
commit 3bf758a04b
2 changed files with 17 additions and 5 deletions
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2
lib/exprengine.cpp
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@ -1728,7 +1728,7 @@ static ExprEngine::ValuePtr executeAssign(const Token *tok, Data &data)
} }
if (!rhsValue) if (!rhsValue)
throw ExprEngineException(tok, "Expression '" + tok->expressionString() + "'; Failed to evaluate RHS"); rhsValue = std::make_shared<ExprEngine::BailoutValue>();
ExprEngine::ValuePtr assignValue; ExprEngine::ValuePtr assignValue;
if (tok->str() == "=") if (tok->str() == "=")

20
test/testbughuntingchecks.cpp
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@ -85,12 +85,24 @@ private:
void arrayIndexOutOfBounds2() { void arrayIndexOutOfBounds2() {
check("void foo(int n) {\n" check("void foo(int n) {\n"
" int p[8];" " int p[8];\n"
" for (int i = 0; i < n; i++)" " for (int i = 0; i < n; i++)\n"
" p[i] = 0;\n" " p[i] = 0;\n"
"}"); "}");
ASSERT_EQUALS("[test.cpp:2]: (error) Array index out of bounds, cannot determine that i is less than 8\n" ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds, cannot determine that i is less than 8\n"
"[test.cpp:2]: (error) Array index out of bounds, cannot determine that i is not negative\n", "[test.cpp:4]: (error) Array index out of bounds, cannot determine that i is not negative\n",
errout.str());
// .. with unknown expression
check("void foo(int n) {\n"
" int p[8];\n"
" crx_data_header_t *d =\n"
" &libraw_internal_data.unpacker_data.crx_header[framei];\n"
" for (int i = 0; i < n; i++)\n"
" p[i] = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Array index out of bounds, cannot determine that i is less than 8\n"
"[test.cpp:6]: (error) Array index out of bounds, cannot determine that i is not negative\n",
errout.str()); errout.str());
} }