danielmarjamaki created this revision.
This patch clarify the error messages about uninitialized function arguments.
It can be really hard to see the problem if there are 10-20 arguments like:
printf("debug:....", a, b.c, d, e, ...);
with no info about which argument is uninitialized and with a complicated path
to investigate it's hard to see the bug.
Repository:
rL LLVM
https://reviews.llvm.org/D30341
Files:
lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
test/Analysis/NewDelete-checker-test.cpp
test/Analysis/diagnostics/undef-value-param.m
test/Analysis/malloc.m
test/Analysis/misc-ps-region-store.m
test/Analysis/misc-ps.m
test/Analysis/null-deref-ps.c
test/Analysis/nullptr.cpp
test/Analysis/uninit-const.c
test/Analysis/uninit-const.cpp
test/Analysis/uninit-msg-expr.m
test/Analysis/uninit-vals-ps.c
test/Analysis/uninit-vals.cpp
Index: test/Analysis/uninit-vals.cpp
===================================================================
--- test/Analysis/uninit-vals.cpp
+++ test/Analysis/uninit-vals.cpp
@@ -27,7 +27,7 @@
// case with undefined values, too.
c1.b.a = c2->b.a;
#else
- c1.b.a = c2->b.a; // expected-warning{{Function call argument is an uninitialized value}}
+ c1.b.a = c2->b.a; // expected-warning{{Function call argument number '1' is an uninitialized value}}
#endif
}
}
Index: test/Analysis/uninit-vals-ps.c
===================================================================
--- test/Analysis/uninit-vals-ps.c
+++ test/Analysis/uninit-vals-ps.c
@@ -14,7 +14,7 @@
int f1_b() {
int x;
- return bar(x)+1; // expected-warning{{Function call argument is an uninitialized value}}
+ return bar(x)+1; // expected-warning{{Function call argument number '1' is an uninitialized value}}
}
int f2() {
Index: test/Analysis/uninit-msg-expr.m
===================================================================
--- test/Analysis/uninit-msg-expr.m
+++ test/Analysis/uninit-msg-expr.m
@@ -52,5 +52,5 @@
void f3() {
NSMutableArray *aArray = [NSArray array];
NSString *aString;
- [aArray addObject:aString]; // expected-warning {{Argument in message expression is an uninitialized value}}
+ [aArray addObject:aString]; // expected-warning {{Argument number '1' in message expression is an uninitialized value}}
}
Index: test/Analysis/uninit-const.cpp
===================================================================
--- test/Analysis/uninit-const.cpp
+++ test/Analysis/uninit-const.cpp
@@ -66,8 +66,8 @@
int &p = t;
int &s = p;
int &q = s; //expected-note {{'q' initialized here}}
- doStuff6(q); //expected-warning {{Function call argument is an uninitialized value}}
- //expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff6(q); //expected-warning {{Function call argument number '1' is an uninitialized value}}
+ //expected-note@-1 {{Function call argument number '1' is an uninitialized value}}
}
void doStuff6_3(int& q_, int *ptr_) {}
@@ -78,32 +78,32 @@
int &p = t;
int &s = p;
int &q = s;
- doStuff6_3(q,ptr); //expected-warning {{Function call argument is an uninitialized value}}
- //expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff6_3(q,ptr); //expected-warning {{Function call argument number '2' is an uninitialized value}}
+ //expected-note@-1 {{Function call argument number '2' is an uninitialized value}}
}
void f6(void) {
int k; // expected-note {{'k' declared without an initial value}}
- doStuff6(k); // expected-warning {{Function call argument is an uninitialized value}}
- // expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff6(k); // expected-warning {{Function call argument number '1' is an uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is an uninitialized value}}
}
void f5(void) {
int t;
int* tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_uninit(tp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_uninit(tp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f4(void) {
int y; // expected-note {{'y' declared without an initial value}}
- doStuff4(y); // expected-warning {{Function call argument is an uninitialized value}}
- // expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff4(y); // expected-warning {{Function call argument number '1' is an uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is an uninitialized value}}
}
void f3(void) {
@@ -123,6 +123,6 @@
void f_uninit(void) {
int x;
- doStuff_uninit(&x); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_uninit(&x); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
Index: test/Analysis/uninit-const.c
===================================================================
--- test/Analysis/uninit-const.c
+++ test/Analysis/uninit-const.c
@@ -24,16 +24,16 @@
void f_1(void) {
int t;
int* tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_1_1(void) {
int t;
int* tp1 = &t;
int* tp2 = tp1; // expected-note {{'tp2' initialized here}}
- doStuff_pointerToConstInt(tp2); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(tp2); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
@@ -45,8 +45,8 @@
int t;
int* p = f_2_sub(&t);
int* tp = p; // expected-note {{'tp' initialized here}}
- doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
int z;
@@ -62,14 +62,14 @@
void f_5(void) {
int ta[5];
int* tp = ta; // expected-note {{'tp' initialized here}}
- doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(tp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_5_1(void) {
int ta[5]; // expected-note {{'ta' initialized here}}
- doStuff_pointerToConstInt(ta); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(ta); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_6(void) {
@@ -92,27 +92,27 @@
void f_8(void) {
int g; // expected-note {{'g' declared without an initial value}}
- doStuff2(g); // expected-warning {{Function call argument is an uninitialized value}}
- // expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff2(g); // expected-warning {{Function call argument number '1' is an uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is an uninitialized value}}
}
void f_9(void) {
int a[6];
int const *ptau = a; // expected-note {{'ptau' initialized here}}
- doStuff_arrayOfConstInt(ptau); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_arrayOfConstInt(ptau); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_10(void) {
int a[6]; // expected-note {{'a' initialized here}}
- doStuff_arrayOfConstInt(a); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_arrayOfConstInt(a); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_11(void) {
int t[10]; //expected-note {{'t' initialized here}}
- doStuff_constStaticSizedArray(t); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_constStaticSizedArray(t); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
void f_12(void) {
@@ -126,8 +126,8 @@
ptr = (int *)malloc(sizeof(int)); // expected-note {{Value assigned to 'ptr'}}
- doStuff_pointerToConstInt(ptr); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_pointerToConstInt(ptr); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
free(ptr);
return 0;
}
@@ -148,25 +148,25 @@
int t;
int v;
int* tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_variadic(tp,v); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_variadic(tp,v); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
// uninit pointer, init val
void f_variadic_unp_inv(void) {
int t;
int v = 3;
int* tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_variadic(tp,v); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_variadic(tp,v); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
// init pointer, uninit val
void f_variadic_inp_unv(void) {
int t=5;
int v; // expected-note {{'v' declared without an initial value}}
int* tp = &t;
- doStuff_variadic(tp,v);// expected-warning {{Function call argument is an uninitialized value}}
- // expected-note@-1 {{Function call argument is an uninitialized value}}
+ doStuff_variadic(tp,v);// expected-warning {{Function call argument number '2' is an uninitialized value}}
+ // expected-note@-1 {{Function call argument number '2' is an uninitialized value}}
}
// init pointer, init val
@@ -192,8 +192,8 @@
int u=3;
int *vp = &u ;
int *tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_variadic(tp,vp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_variadic(tp,vp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
//init pointer, uninit pointer
@@ -211,6 +211,6 @@
int u;
int *vp = &u ;
int *tp = &t; // expected-note {{'tp' initialized here}}
- doStuff_variadic(tp,vp); // expected-warning {{Function call argument is a pointer to uninitialized value}}
- // expected-note@-1 {{Function call argument is a pointer to uninitialized value}}
+ doStuff_variadic(tp,vp); // expected-warning {{Function call argument number '1' is a pointer to uninitialized value}}
+ // expected-note@-1 {{Function call argument number '1' is a pointer to uninitialized value}}
}
Index: test/Analysis/nullptr.cpp
===================================================================
--- test/Analysis/nullptr.cpp
+++ test/Analysis/nullptr.cpp
@@ -107,7 +107,7 @@
void shouldNotCrash() {
decltype(nullptr) p;
if (getSymbol())
- invokeF(p); // expected-warning{{Function call argument is an uninit}}
+ invokeF(p); // expected-warning{{Function call argument number '1' is an uninit}}
if (getSymbol())
invokeF(nullptr);
if (getSymbol()) {
Index: test/Analysis/null-deref-ps.c
===================================================================
--- test/Analysis/null-deref-ps.c
+++ test/Analysis/null-deref-ps.c
@@ -286,7 +286,7 @@
void pr4759() {
int *p;
- pr4759_aux(p); // expected-warning{{Function call argument is an uninitialized value}}
+ pr4759_aux(p); // expected-warning{{Function call argument number '1' is an uninitialized value}}
}
// Relax function call arguments invalidation to be aware of const
Index: test/Analysis/misc-ps.m
===================================================================
--- test/Analysis/misc-ps.m
+++ test/Analysis/misc-ps.m
@@ -796,16 +796,16 @@
void test_bad_call_aux(int x);
void test_bad_call(void) {
int y;
- test_bad_call_aux(y); // expected-warning{{Function call argument is an uninitialized value}}
+ test_bad_call_aux(y); // expected-warning{{Function call argument number '1' is an uninitialized value}}
}
@interface TestBadArg {}
- (void) testBadArg:(int) x;
@end
void test_bad_msg(TestBadArg *p) {
int y;
- [p testBadArg:y]; // expected-warning{{Argument in message expression is an uninitialized value}}
+ [p testBadArg:y]; // expected-warning{{Argument number '1' in message expression is an uninitialized value}}
}
//===----------------------------------------------------------------------===//
Index: test/Analysis/misc-ps-region-store.m
===================================================================
--- test/Analysis/misc-ps-region-store.m
+++ test/Analysis/misc-ps-region-store.m
@@ -396,7 +396,7 @@
int rdar_7332673_test2_aux(char *x);
void rdar_7332673_test2() {
char *value;
- if ( rdar_7332673_test2_aux(value) != 1 ) {} // expected-warning{{Function call argument is an uninitialized value}}
+ if ( rdar_7332673_test2_aux(value) != 1 ) {} // expected-warning{{Function call argument number '1' is an uninitialized value}}
}
//===----------------------------------------------------------------------===//
@@ -673,7 +673,7 @@
builder = ^(id object) {
id x;
if (object) {
- builder(x); // expected-warning{{Block call argument is an uninitialized value}}
+ builder(x); // expected-warning{{Block call argument number '1' is an uninitialized value}}
}
};
builder(target);
Index: test/Analysis/malloc.m
===================================================================
--- test/Analysis/malloc.m
+++ test/Analysis/malloc.m
@@ -29,7 +29,7 @@
if (error != ((void*)0))
return error;
- rdar10579586(buffer->str_c); // expected-warning {{Function call argument is an uninitialized value}}
+ rdar10579586(buffer->str_c); // expected-warning {{Function call argument number '1' is an uninitialized value}}
free(buffer);
return ((void*)0);
}
Index: test/Analysis/diagnostics/undef-value-param.m
===================================================================
--- test/Analysis/diagnostics/undef-value-param.m
+++ test/Analysis/diagnostics/undef-value-param.m
@@ -45,8 +45,8 @@
CreateRefUndef(&storeRef, 4);
//expected-note@-1{{Calling 'CreateRefUndef'}}
//expected-note@-2{{Returning from 'CreateRefUndef'}}
- CFRelease(storeRef); //expected-warning {{Function call argument is an uninitialized value}}
- //expected-note@-1{{Function call argument is an uninitialized value}}
+ CFRelease(storeRef); //expected-warning {{Function call argument number '1' is an uninitialized value}}
+ //expected-note@-1{{Function call argument number '1' is an uninitialized value}}
}
@end
@@ -918,12 +918,12 @@
// CHECK-NEXT: </array>
// CHECK-NEXT: <key>depth</key><integer>0</integer>
// CHECK-NEXT: <key>extended_message</key>
-// CHECK-NEXT: <string>Function call argument is an uninitialized value</string>
+// CHECK-NEXT: <string>Function call argument number '1' is an uninitialized value</string>
// CHECK-NEXT: <key>message</key>
-// CHECK-NEXT: <string>Function call argument is an uninitialized value</string>
+// CHECK-NEXT: <string>Function call argument number '1' is an uninitialized value</string>
// CHECK-NEXT: </dict>
// CHECK-NEXT: </array>
-// CHECK-NEXT: <key>description</key><string>Function call argument is an uninitialized value</string>
+// CHECK-NEXT: <key>description</key><string>Function call argument number '1' is an uninitialized value</string>
// CHECK-NEXT: <key>category</key><string>Logic error</string>
// CHECK-NEXT: <key>type</key><string>Uninitialized argument value</string>
// CHECK-NEXT: <key>check_name</key><string>core.CallAndMessage</string>
Index: test/Analysis/NewDelete-checker-test.cpp
===================================================================
--- test/Analysis/NewDelete-checker-test.cpp
+++ test/Analysis/NewDelete-checker-test.cpp
@@ -244,7 +244,7 @@
void testUninitFree() {
int *x;
- free(x); // expected-warning{{Function call argument is an uninitialized value}}
+ free(x); // expected-warning{{Function call argument number '1' is an uninitialized value}}
}
void testUninitDeleteSink() {
Index: lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
+++ lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
@@ -71,7 +71,7 @@
private:
bool PreVisitProcessArg(CheckerContext &C, SVal V, SourceRange ArgRange,
- const Expr *ArgEx, bool IsFirstArgument,
+ const Expr *ArgEx, int ArgumentNumber,
bool CheckUninitFields, const CallEvent &Call,
std::unique_ptr<BugType> &BT,
const ParmVarDecl *ParamDecl) const;
@@ -89,9 +89,10 @@
BT.reset(new BuiltinBug(this, desc));
}
bool uninitRefOrPointer(CheckerContext &C, const SVal &V,
- SourceRange ArgRange,
- const Expr *ArgEx, std::unique_ptr<BugType> &BT,
- const ParmVarDecl *ParamDecl, const char *BD) const;
+ SourceRange ArgRange, const Expr *ArgEx,
+ std::unique_ptr<BugType> &BT,
+ const ParmVarDecl *ParamDecl, const char *BD,
+ int ArgumentNumber) const;
};
} // end anonymous namespace
@@ -111,58 +112,61 @@
C.emitReport(std::move(R));
}
-static StringRef describeUninitializedArgumentInCall(const CallEvent &Call,
- bool IsFirstArgument) {
+static std::string describeUninitializedArgumentInCall(const CallEvent &Call,
+ int ArgumentNumber) {
switch (Call.getKind()) {
case CE_ObjCMessage: {
const ObjCMethodCall &Msg = cast<ObjCMethodCall>(Call);
switch (Msg.getMessageKind()) {
case OCM_Message:
- return "Argument in message expression is an uninitialized value";
+ return "Argument number '" + std::to_string(ArgumentNumber+1) +
+ "' in message expression is an uninitialized value";
case OCM_PropertyAccess:
assert(Msg.isSetter() && "Getters have no args");
return "Argument for property setter is an uninitialized value";
case OCM_Subscript:
- if (Msg.isSetter() && IsFirstArgument)
+ if (Msg.isSetter() && (ArgumentNumber == 0))
return "Argument for subscript setter is an uninitialized value";
return "Subscript index is an uninitialized value";
}
llvm_unreachable("Unknown message kind.");
}
case CE_Block:
- return "Block call argument is an uninitialized value";
+ return "Block call argument number '" + std::to_string(ArgumentNumber+1) +
+ "' is an uninitialized value";
default:
- return "Function call argument is an uninitialized value";
+ return "Function call argument number '" + std::to_string(ArgumentNumber+1) +
+ "' is an uninitialized value";
}
}
-bool CallAndMessageChecker::uninitRefOrPointer(CheckerContext &C,
- const SVal &V,
- SourceRange ArgRange,
- const Expr *ArgEx,
- std::unique_ptr<BugType> &BT,
- const ParmVarDecl *ParamDecl,
- const char *BD) const {
+bool CallAndMessageChecker::uninitRefOrPointer(
+ CheckerContext &C, const SVal &V, SourceRange ArgRange, const Expr *ArgEx,
+ std::unique_ptr<BugType> &BT, const ParmVarDecl *ParamDecl, const char *BD,
+ int ArgumentNumber) const {
if (!Filter.Check_CallAndMessageUnInitRefArg)
return false;
// No parameter declaration available, i.e. variadic function argument.
- if(!ParamDecl)
+ if (!ParamDecl)
return false;
// If parameter is declared as pointer to const in function declaration,
// then check if corresponding argument in function call is
// pointing to undefined symbol value (uninitialized memory).
- StringRef Message;
+ std::string Message;
if (ParamDecl->getType()->isPointerType()) {
- Message = "Function call argument is a pointer to uninitialized value";
+ Message = "Function call argument number '" +
+ std::to_string(ArgumentNumber+1) +
+ "' is a pointer to uninitialized value";
} else if (ParamDecl->getType()->isReferenceType()) {
- Message = "Function call argument is an uninitialized value";
+ Message = "Function call argument number '" +
+ std::to_string(ArgumentNumber+1) + "' is an uninitialized value";
} else
return false;
- if(!ParamDecl->getType()->getPointeeType().isConstQualified())
+ if (!ParamDecl->getType()->getPointeeType().isConstQualified())
return false;
if (const MemRegion *SValMemRegion = V.getAsRegion()) {
@@ -188,24 +192,24 @@
SVal V,
SourceRange ArgRange,
const Expr *ArgEx,
- bool IsFirstArgument,
+ int ArgumentNumber,
bool CheckUninitFields,
const CallEvent &Call,
std::unique_ptr<BugType> &BT,
const ParmVarDecl *ParamDecl
) const {
const char *BD = "Uninitialized argument value";
- if (uninitRefOrPointer(C, V, ArgRange, ArgEx, BT, ParamDecl, BD))
+ if (uninitRefOrPointer(C, V, ArgRange, ArgEx, BT, ParamDecl, BD,
+ ArgumentNumber))
return true;
if (V.isUndef()) {
if (ExplodedNode *N = C.generateErrorNode()) {
LazyInit_BT(BD, BT);
-
// Generate a report for this bug.
- StringRef Desc =
- describeUninitializedArgumentInCall(Call, IsFirstArgument);
+ std::string Desc =
+ describeUninitializedArgumentInCall(Call, ArgumentNumber);
auto R = llvm::make_unique<BugReport>(*BT, Desc, N);
R->addRange(ArgRange);
if (ArgEx)
@@ -435,7 +439,7 @@
if(FD && i < FD->getNumParams())
ParamDecl = FD->getParamDecl(i);
if (PreVisitProcessArg(C, Call.getArgSVal(i), Call.getArgSourceRange(i),
- Call.getArgExpr(i), /*IsFirstArgument=*/i == 0,
+ Call.getArgExpr(i), i,
checkUninitFields, Call, *BT, ParamDecl))
return;
}
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