[cfe-commits] r89726 - in /cfe/trunk: include/clang/Analysis/PathSensitive/BugType.h lib/Analysis/DereferenceChecker.cpp lib/Analysis/NSErrorChecker.cpp test/Analysis/null-deref-ps.c test/Analysis/plist-output.m
Ted Kremenek
kremenek at apple.com
Mon Nov 23 17:33:11 PST 2009
Author: kremenek
Date: Mon Nov 23 19:33:10 2009
New Revision: 89726
URL: http://llvm.org/viewvc/llvm-project?rev=89726&view=rev
Log:
Enhance null dereference diagnostics by indicating what variable (if any) was dereferenced. Addresses <rdar://problem/7039161>.
Modified:
cfe/trunk/include/clang/Analysis/PathSensitive/BugType.h
cfe/trunk/lib/Analysis/DereferenceChecker.cpp
cfe/trunk/lib/Analysis/NSErrorChecker.cpp
cfe/trunk/test/Analysis/null-deref-ps.c
cfe/trunk/test/Analysis/plist-output.m
Modified: cfe/trunk/include/clang/Analysis/PathSensitive/BugType.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Analysis/PathSensitive/BugType.h?rev=89726&r1=89725&r2=89726&view=diff
==============================================================================
--- cfe/trunk/include/clang/Analysis/PathSensitive/BugType.h (original)
+++ cfe/trunk/include/clang/Analysis/PathSensitive/BugType.h Mon Nov 23 19:33:10 2009
@@ -39,8 +39,8 @@
virtual ~BugType();
// FIXME: Should these be made strings as well?
- const std::string& getName() const { return Name; }
- const std::string& getCategory() const { return Category; }
+ llvm::StringRef getName() const { return Name; }
+ llvm::StringRef getCategory() const { return Category; }
/// isSuppressOnSink - Returns true if bug reports associated with this bug
/// type should be suppressed if the end node of the report is post-dominated
@@ -76,7 +76,7 @@
BuiltinBug(GRExprEngine *eng, const char* n)
: BugType(n, "Logic error"), Eng(eng), desc(n) {}
- const std::string &getDescription() const { return desc; }
+ llvm::StringRef getDescription() const { return desc; }
virtual void FlushReportsImpl(BugReporter& BR, GRExprEngine& Eng) {}
Modified: cfe/trunk/lib/Analysis/DereferenceChecker.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/DereferenceChecker.cpp?rev=89726&r1=89725&r2=89726&view=diff
==============================================================================
--- cfe/trunk/lib/Analysis/DereferenceChecker.cpp (original)
+++ cfe/trunk/lib/Analysis/DereferenceChecker.cpp Mon Nov 23 19:33:10 2009
@@ -90,11 +90,31 @@
// We know that 'location' cannot be non-null. This is what
// we call an "explicit" null dereference.
if (!BT_null)
- BT_null = new BuiltinBug("Null pointer dereference",
- "Dereference of null pointer");
+ BT_null = new BuiltinBug("Dereference of null pointer");
+
+ llvm::SmallString<100> buf;
+
+ switch (S->getStmtClass()) {
+ case Stmt::UnaryOperatorClass: {
+ const UnaryOperator *U = cast<UnaryOperator>(S);
+ const Expr *SU = U->getSubExpr()->IgnoreParens();
+ if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(SU)) {
+ if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
+ llvm::raw_svector_ostream os(buf);
+ os << "Dereference of null pointer loaded from variable '"
+ << VD->getName() << '\'';
+ }
+ }
+ }
+ default:
+ break;
+ }
EnhancedBugReport *report =
- new EnhancedBugReport(*BT_null, BT_null->getDescription(), N);
+ new EnhancedBugReport(*BT_null,
+ buf.empty() ? BT_null->getDescription():buf.str(),
+ N);
+
report->addVisitorCreator(bugreporter::registerTrackNullOrUndefValue,
bugreporter::GetDerefExpr(N));
Modified: cfe/trunk/lib/Analysis/NSErrorChecker.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/NSErrorChecker.cpp?rev=89726&r1=89725&r2=89726&view=diff
==============================================================================
--- cfe/trunk/lib/Analysis/NSErrorChecker.cpp (original)
+++ cfe/trunk/lib/Analysis/NSErrorChecker.cpp Mon Nov 23 19:33:10 2009
@@ -114,10 +114,13 @@
os << " should have a non-void return value to indicate whether or not an "
"error occurred";
+ // FIXME: Remove when we migrate EmitBasicReport to StringRef.
+ std::string cat = getCategory().str();
+
BR.EmitBasicReport(isNSErrorWarning
? "Bad return type when passing NSError**"
: "Bad return type when passing CFError*",
- getCategory().c_str(), os.str().c_str(),
+ cat.c_str(), os.str().c_str(),
CodeDecl.getLocation());
}
Modified: cfe/trunk/test/Analysis/null-deref-ps.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Analysis/null-deref-ps.c?rev=89726&r1=89725&r2=89726&view=diff
==============================================================================
--- cfe/trunk/test/Analysis/null-deref-ps.c (original)
+++ cfe/trunk/test/Analysis/null-deref-ps.c Mon Nov 23 19:33:10 2009
@@ -26,7 +26,7 @@
if (p)
p->x = 1;
- return p->x++; // expected-warning{{Dereference of null pointer.}}
+ return p->x++; // expected-warning{{Dereference of null pointer}}
}
int f3(char* x) {
@@ -36,7 +36,7 @@
if (x)
return x[i - 1];
- return x[i+1]; // expected-warning{{Dereference of null pointer.}}
+ return x[i+1]; // expected-warning{{Dereference of null pointer}}
}
int f3_b(char* x) {
@@ -46,7 +46,7 @@
if (x)
return x[i - 1];
- return x[i+1]++; // expected-warning{{Dereference of null pointer.}}
+ return x[i+1]++; // expected-warning{{Dereference of null pointer}}
}
int f4(int *p) {
@@ -57,7 +57,7 @@
return 1;
int *q = (int*) x;
- return *q; // expected-warning{{Dereference of null pointer.}}
+ return *q; // expected-warning{{Dereference of null pointer loaded from variable 'q'}}
}
int f4_b() {
Modified: cfe/trunk/test/Analysis/plist-output.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Analysis/plist-output.m?rev=89726&r1=89725&r2=89726&view=diff
==============================================================================
--- cfe/trunk/test/Analysis/plist-output.m (original)
+++ cfe/trunk/test/Analysis/plist-output.m Mon Nov 23 19:33:10 2009
@@ -4,6 +4,39 @@
int *p = 0;
*p = 0xDEADBEEF;
}
+
+void test_null_assign(void) {
+ int *p;
+ p = 0;
+ *p = 0xDEADBEEF;
+}
+
+void test_null_assign_transitive(void) {
+ int *p;
+ p = 0;
+ int *q = p;
+ *q = 0xDEADBEEF;
+}
+
+void test_null_cond(int *p) {
+ if (!p) {
+ *p = 0xDEADBEEF;
+ }
+}
+
+void test_null_cond_transitive(int *q) {
+ if (!q) {
+ int *p = q;
+ *p = 0xDEADBEEF;
+ }
+}
+
+void test_null_field(void) {
+ struct s { int *p; } x;
+ x.p = 0;
+ *(x.p) = 0xDEADBEEF;
+}
+
// CHECK: <?xml version="1.0" encoding="UTF-8"?>
// CHECK: <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
// CHECK: <plist version="1.0">
@@ -102,14 +135,14 @@
// CHECK: </array>
// CHECK: </array>
// CHECK: <key>extended_message</key>
-// CHECK: <string>Dereference of null pointer</string>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
// CHECK: <key>message</key>
-// CHECK: <string>Dereference of null pointer</string>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
// CHECK: </dict>
// CHECK: </array>
-// CHECK: <key>description</key><string>Dereference of null pointer</string>
+// CHECK: <key>description</key><string>Dereference of null pointer loaded from variable 'p'</string>
// CHECK: <key>category</key><string>Logic error</string>
-// CHECK: <key>type</key><string>Null pointer dereference</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
// CHECK: <key>location</key>
// CHECK: <dict>
// CHECK: <key>line</key><integer>5</integer>
@@ -117,6 +150,702 @@
// CHECK: <key>file</key><integer>0</integer>
// CHECK: </dict>
// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>path</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>9</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>9</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Null pointer value stored to 'p'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Null pointer value stored to 'p'</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>10</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>11</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>path</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>15</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>15</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Variable 'q' initialized to a null pointer value</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Variable 'q' initialized to a null pointer value</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>17</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'q'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'q'</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer loaded from variable 'q'</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>18</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>path</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Assuming pointer value is null</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Assuming pointer value is null</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>22</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>6</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>6</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>23</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>path</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Assuming pointer value is null</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Assuming pointer value is null</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>28</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>29</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>29</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>29</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>29</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>6</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>6</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer loaded from variable 'p'</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>30</integer>
+// CHECK: <key>col</key><integer>5</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>path</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>10</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>10</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>control</string>
+// CHECK: <key>edges</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>start</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>10</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>35</integer>
+// CHECK: <key>col</key><integer>10</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>end</key>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>ranges</key>
+// CHECK: <array>
+// CHECK: <array>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>37</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </dict>
// CHECK: </array>
// CHECK: </dict>
// CHECK: </plist>
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