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arrayIndexOutOfBounds check is now done without --all 

Errors with buf[1] are still listed only with --all due to false positive risk in them.
This commit is contained in:
Reijo Tomperi 2009-10-13 22:39:51 +03:00
parent 0c3da73ee1
commit 4036dd5eff
3 changed files with 62 additions and 38 deletions
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32
src/checkbufferoverrun.cpp
View File

@ -45,21 +45,33 @@ CheckBufferOverrun instance;
//--------------------------------------------------------------------------- //---------------------------------------------------------------------------
void CheckBufferOverrun::arrayIndexOutOfBounds(const Token *tok) void CheckBufferOverrun::arrayIndexOutOfBounds(const Token *tok, int size)
{ {
if (!tok) if (!tok)
arrayIndexOutOfBounds(); arrayIndexOutOfBounds(size);
else else
{ {
_callStack.push_back(tok); _callStack.push_back(tok);
arrayIndexOutOfBounds(); arrayIndexOutOfBounds(size);
_callStack.pop_back(); _callStack.pop_back();
} }
} }
void CheckBufferOverrun::arrayIndexOutOfBounds() void CheckBufferOverrun::arrayIndexOutOfBounds(int size)
{ {
reportError(_callStack, Severity::possibleError, "arrayIndexOutOfBounds", "Array index out of bounds"); Severity::e severity;
if (size <= 1)
{
severity = Severity::possibleError;
if (_settings->_showAll == false)
return;
}
else
{
severity = Severity::error;
}
reportError(_callStack, severity, "arrayIndexOutOfBounds", "Array index out of bounds");
} }
void CheckBufferOverrun::bufferOverrun(const Token *tok) void CheckBufferOverrun::bufferOverrun(const Token *tok)
@ -122,7 +134,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const char *varname[], con
const char *num = tok->strAt(2); const char *num = tok->strAt(2);
if (std::strtol(num, NULL, 10) >= size) if (std::strtol(num, NULL, 10) >= size)
{ {
arrayIndexOutOfBounds(tok->next()); arrayIndexOutOfBounds(tok->next(), size);
} }
} }
} }
@ -131,7 +143,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const char *varname[], con
const char *num = tok->strAt(2 + varc); const char *num = tok->strAt(2 + varc);
if (std::strtol(num, NULL, 10) >= size) if (std::strtol(num, NULL, 10) >= size)
{ {
arrayIndexOutOfBounds(tok->next()); arrayIndexOutOfBounds(tok->next(), size);
} }
} }
@ -160,7 +172,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const char *varname[], con
{ {
if (std::strtol(num, NULL, 10) > size || !Token::Match(tok->previous(), "& (")) if (std::strtol(num, NULL, 10) > size || !Token::Match(tok->previous(), "& ("))
{ {
arrayIndexOutOfBounds(tok->next()); arrayIndexOutOfBounds(tok->next(), size);
} }
} }
} }
@ -170,7 +182,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const char *varname[], con
const char *num = tok->next()->strAt(2 + varc); const char *num = tok->next()->strAt(2 + varc);
if (std::strtol(num, NULL, 10) >= size) if (std::strtol(num, NULL, 10) >= size)
{ {
arrayIndexOutOfBounds(tok->next()); arrayIndexOutOfBounds(tok->next(), size);
} }
tok = tok->tokAt(4); tok = tok->tokAt(4);
continue; continue;
@ -406,7 +418,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const char *varname[], con
//printf("min_index = %d, max_index = %d, size = %d\n", min_index, max_index, size); //printf("min_index = %d, max_index = %d, size = %d\n", min_index, max_index, size);
if (min_index >= size || max_index >= size) if (min_index >= size || max_index >= size)
{ {
arrayIndexOutOfBounds(tok2->next()); arrayIndexOutOfBounds(tok2->next(), size);
} }
} }

9
src/checkbufferoverrun.h
View File

@ -50,8 +50,7 @@ public:
void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
{ {
CheckBufferOverrun checkBufferOverrun(tokenizer, settings, errorLogger); CheckBufferOverrun checkBufferOverrun(tokenizer, settings, errorLogger);
if (settings->_showAll) checkBufferOverrun.bufferOverrun();
checkBufferOverrun.bufferOverrun();
} }
/** Check for buffer overruns */ /** Check for buffer overruns */
@ -80,8 +79,8 @@ private:
/** callstack - used during intra-function checking */ /** callstack - used during intra-function checking */
std::list<const Token *> _callStack; std::list<const Token *> _callStack;
void arrayIndexOutOfBounds(const Token *tok); void arrayIndexOutOfBounds(const Token *tok, int size);
void arrayIndexOutOfBounds(); void arrayIndexOutOfBounds(int size);
void bufferOverrun(const Token *tok); void bufferOverrun(const Token *tok);
void dangerousStdCin(const Token *tok); void dangerousStdCin(const Token *tok);
void strncatUsage(const Token *tok); void strncatUsage(const Token *tok);
@ -90,7 +89,7 @@ private:
void getErrorMessages() void getErrorMessages()
{ {
arrayIndexOutOfBounds(0); arrayIndexOutOfBounds(0, 2);
bufferOverrun(0); bufferOverrun(0);
dangerousStdCin(0); dangerousStdCin(0);
strncatUsage(0); strncatUsage(0);

59
test/testbufferoverrun.cpp
View File

@ -221,7 +221,7 @@ private:
" int data[2];\n" " int data[2];\n"
" data[ sizeof(data[0]) ] = 0;\n" " data[ sizeof(data[0]) ] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:4]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds\n", errout.str());
} }
void sizeof3() void sizeof3()
@ -244,7 +244,7 @@ private:
" str[15] = 0;\n" " str[15] = 0;\n"
" str[16] = 0;\n" " str[16] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
@ -256,7 +256,7 @@ private:
" str[15] = 0;\n" " str[15] = 0;\n"
" str[16] = 0;\n" " str[16] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
@ -306,7 +306,7 @@ private:
" int i[SIZE];\n" " int i[SIZE];\n"
" i[SIZE] = 0;\n" " i[SIZE] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
@ -317,7 +317,7 @@ private:
" int i[10];\n" " int i[10];\n"
" i[ sizeof(i) - 1 ] = 0;\n" " i[ sizeof(i) - 1 ] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:4]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds\n", errout.str());
} }
@ -333,7 +333,22 @@ private:
" struct ABC abc;\n" " struct ABC abc;\n"
" abc.str[10] = 0;\n" " abc.str[10] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:9]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:9]: (error) Array index out of bounds\n", errout.str());
// This is not out of bounds
check("struct ABC\n"
"{\n"
" char str[1];\n"
"};\n"
"\n"
"static void f()\n"
"{\n"
" int datasize = 10;\n"
" struct ABC* x = malloc(sizeof(struct ABC) + datasize - 1);\n"
" x->str[1] = 0;"
"}\n");
ASSERT_EQUALS("[test.cpp:10]: (possible error) Array index out of bounds\n", errout.str());
TODO_ASSERT_EQUALS("", errout.str());
} }
@ -348,7 +363,7 @@ private:
"{\n" "{\n"
" abc->str[10] = 0;\n" " abc->str[10] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:8]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:8]: (error) Array index out of bounds\n", errout.str());
} }
@ -366,7 +381,7 @@ private:
" struct ABC abc;\n" " struct ABC abc;\n"
" abc.str[SIZE] = 0;\n" " abc.str[SIZE] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:11]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:11]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_9() void array_index_9()
@ -381,7 +396,7 @@ private:
" char str[5];\n" " char str[5];\n"
" memclr( str ); // ERROR\n" " memclr( str ); // ERROR\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:3]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:3]: (error) Array index out of bounds\n", errout.str());
} }
@ -401,7 +416,7 @@ private:
"{\n" "{\n"
" memclr(abc->str);\n" " memclr(abc->str);\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:13] -> [test.cpp:8]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:13] -> [test.cpp:8]: (error) Array index out of bounds\n", errout.str());
} }
@ -422,7 +437,7 @@ private:
" abc->str[10] = 0;\n" " abc->str[10] = 0;\n"
" }\n" " }\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:12]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:12]: (error) Array index out of bounds\n", errout.str());
} }
@ -439,7 +454,7 @@ private:
"{\n" "{\n"
" str[10] = 0;\n" " str[10] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:10]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:10]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_13() void array_index_13()
@ -464,7 +479,7 @@ private:
" for (int i = 0; i < 10; i++)\n" " for (int i = 0; i < 10; i++)\n"
" a[i+10] = i;\n" " a[i+10] = i;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_15() void array_index_15()
@ -475,7 +490,7 @@ private:
" for (int i = 0; i < 10; i++)\n" " for (int i = 0; i < 10; i++)\n"
" a[10+i] = i;\n" " a[10+i] = i;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_16() void array_index_16()
@ -486,7 +501,7 @@ private:
" for (int i = 0; i < 10; i++)\n" " for (int i = 0; i < 10; i++)\n"
" a[i+1] = i;\n" " a[i+1] = i;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_17() void array_index_17()
@ -497,7 +512,7 @@ private:
" for (int i = 0; i < 10; i++)\n" " for (int i = 0; i < 10; i++)\n"
" a[i*2] = i;\n" " a[i*2] = i;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
check("void f()\n" check("void f()\n"
"{\n" "{\n"
@ -513,7 +528,7 @@ private:
" for (int i = 0; i < 12; i+=6)\n" " for (int i = 0; i < 12; i+=6)\n"
" a[i+6] = i;\n" " a[i+6] = i;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
void array_index_18() void array_index_18()
@ -590,7 +605,7 @@ private:
" char a[2];\n" " char a[2];\n"
" char *end = &(a[3]);\n" " char *end = &(a[3]);\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:4]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds\n", errout.str());
} }
void buffer_overrun_1() void buffer_overrun_1()
@ -978,11 +993,9 @@ private:
"{\n" "{\n"
" str[3] = 0;\n" " str[3] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:5]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:5]: (error) Array index out of bounds\n", errout.str());
} }
void alloc() void alloc()
{ {
check("void foo()\n" check("void foo()\n"
@ -990,14 +1003,14 @@ private:
" char *s = new char[10];\n" " char *s = new char[10];\n"
" s[10] = 0;\n" " s[10] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:4]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds\n", errout.str());
check("void foo()\n" check("void foo()\n"
"{\n" "{\n"
" char *s = malloc(10);\n" " char *s = malloc(10);\n"
" s[10] = 0;\n" " s[10] = 0;\n"
"}\n"); "}\n");
ASSERT_EQUALS("[test.cpp:4]: (possible error) Array index out of bounds\n", errout.str()); ASSERT_EQUALS("[test.cpp:4]: (error) Array index out of bounds\n", errout.str());
} }