[cfe-commits] r162563 - in /cfe/trunk: lib/StaticAnalyzer/Core/BugReporterVisitors.cpp test/Analysis/inlining/path-notes.c
Jordan Rose
jordan_rose at apple.com
Fri Aug 24 09:34:32 PDT 2012
Author: jrose
Date: Fri Aug 24 11:34:31 2012
New Revision: 162563
URL: http://llvm.org/viewvc/llvm-project?rev=162563&view=rev
Log:
[analyzer] If we dereference a NULL that came from a function, show the return.
More generally, any time we try to track where a null value came from, we
should show if it came from a function. This usually isn't necessary if
the value is symbolic, but if the value is just a constant we previously
just ignored its origin entirely. Now, we'll step into the function and
recursively add a visitor to the returned expression.
<rdar://problem/12114609>
Modified:
cfe/trunk/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp
cfe/trunk/test/Analysis/inlining/path-notes.c
Modified: cfe/trunk/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp?rev=162563&r1=162562&r2=162563&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp Fri Aug 24 11:34:31 2012
@@ -296,6 +296,49 @@
return NULL;
}
+namespace {
+class ReturnNullVisitor : public BugReporterVisitorImpl<ReturnNullVisitor> {
+ const ExplodedNode *ReturnNode;
+public:
+ ReturnNullVisitor(const ExplodedNode *N) : ReturnNode(N) {}
+
+ virtual void Profile(llvm::FoldingSetNodeID &ID) const {
+ static int Tag = 0;
+ ID.AddPointer(&Tag);
+ ID.Add(*ReturnNode);
+ }
+
+ PathDiagnosticPiece *VisitNode(const ExplodedNode *N,
+ const ExplodedNode *PrevN,
+ BugReporterContext &BRC,
+ BugReport &BR) {
+ if (ReturnNode != BRC.getNodeResolver().getOriginalNode(N))
+ return 0;
+
+ StmtPoint SP = cast<StmtPoint>(ReturnNode->getLocation());
+ const ReturnStmt *Ret = cast<ReturnStmt>(SP.getStmt());
+ PathDiagnosticLocation L(Ret, BRC.getSourceManager(),
+ N->getLocationContext());
+
+ SmallString<64> Msg;
+ llvm::raw_svector_ostream Out(Msg);
+
+ if (Loc::isLocType(Ret->getRetValue()->getType()))
+ Out << "Returning null pointer";
+ else
+ Out << "Returning zero";
+
+ // FIXME: We should have a more generalized printing mechanism.
+ const Expr *RetE = Ret->getRetValue()->IgnoreParenCasts();
+ if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(RetE))
+ if (const DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(DR->getDecl()))
+ Out << " (loaded from '" << *DD << "')";
+
+ return new PathDiagnosticEventPiece(L, Out.str());
+ }
+};
+} // end anonymous namespace
+
void bugreporter::addTrackNullOrUndefValueVisitor(const ExplodedNode *N,
const Stmt *S,
BugReport *report) {
@@ -311,6 +354,9 @@
if (const PostStmt *ps = dyn_cast<PostStmt>(&pp)) {
if (ps->getStmt() == S)
break;
+ } else if (const CallExitEnd *CEE = dyn_cast<CallExitEnd>(&pp)) {
+ if (CEE->getCalleeContext()->getCallSite() == S)
+ break;
}
N = N->getFirstPred();
}
@@ -364,6 +410,28 @@
report->addVisitor(new TrackConstraintBRVisitor(loc::MemRegionVal(R),
false));
}
+ } else {
+ // Walk backwards to just before the post-statement checks.
+ ProgramPoint PP = N->getLocation();
+ while (N && isa<PostStmt>(PP = N->getLocation()))
+ N = N->getFirstPred();
+
+ if (N && isa<CallExitEnd>(PP)) {
+ // Find a ReturnStmt, if there is one.
+ do {
+ N = N->getFirstPred();
+ PP = N->getLocation();
+ } while (!isa<StmtPoint>(PP) && !isa<CallEnter>(PP));
+
+ if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) {
+ if (const ReturnStmt *Ret = SP->getStmtAs<ReturnStmt>()) {
+ if (const Expr *RetE = Ret->getRetValue()) {
+ report->addVisitor(new ReturnNullVisitor(N));
+ addTrackNullOrUndefValueVisitor(N, RetE, report);
+ }
+ }
+ }
+ }
}
}
Modified: cfe/trunk/test/Analysis/inlining/path-notes.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Analysis/inlining/path-notes.c?rev=162563&r1=162562&r2=162563&view=diff
==============================================================================
--- cfe/trunk/test/Analysis/inlining/path-notes.c (original)
+++ cfe/trunk/test/Analysis/inlining/path-notes.c Fri Aug 24 11:34:31 2012
@@ -57,6 +57,38 @@
}
+int *getZero() {
+ int *p = 0;
+ // expected-note at -1 {{Variable 'p' initialized to a null pointer value}}
+ // ^ This note checks that we add a second visitor for the return value.
+ return p;
+ // expected-note at -1 {{Returning null pointer (loaded from 'p')}}
+}
+
+void testReturnZero() {
+ *getZero() = 1; // expected-warning{{Dereference of null pointer}}
+ // expected-note at -1 {{Calling 'getZero'}}
+ // expected-note at -2 {{Returning from 'getZero'}}
+ // expected-note at -3 {{Dereference of null pointer}}
+}
+
+void testInitZero() {
+ // FIXME: <rdar://problem/12114689> Diagnostics: Need to step into the function whose result is assigned to an interesting region
+ int *a = getZero();
+ // expected-note at -1 {{Variable 'a' initialized to a null pointer value}}
+ *a = 1; // expected-warning{{Dereference of null pointer}}
+ // expected-note at -1 {{Dereference of null pointer (loaded from variable 'a')}}
+}
+
+void testStoreZero(int *a) {
+ // FIXME: <rdar://problem/12114689> Diagnostics: Need to step into the function whose result is assigned to an interesting region
+ a = getZero();
+ // expected-note at -1 {{Null pointer value stored to 'a'}}
+ *a = 1; // expected-warning{{Dereference of null pointer}}
+ // expected-note at -1 {{Dereference of null pointer (loaded from variable 'a')}}
+}
+
+
// 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">
@@ -1286,6 +1318,774 @@
// 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>69</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>69</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</integer>
+// CHECK: <key>col</key><integer>4</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>69</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</integer>
+// CHECK: <key>col</key><integer>12</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Calling 'getZero'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Calling 'getZero'</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>60</integer>
+// CHECK: <key>col</key><integer>1</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <key>depth</key><integer>1</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Entered call from 'testReturnZero'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Entered call from 'testReturnZero'</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>60</integer>
+// CHECK: <key>col</key><integer>1</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>60</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>61</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>61</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>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>61</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>61</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>61</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>1</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Variable 'p' initialized to a null pointer value</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Variable 'p' 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>61</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>61</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>64</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>64</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>64</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>64</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>64</integer>
+// CHECK: <key>col</key><integer>10</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>1</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Returning null pointer (loaded from 'p')</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Returning null pointer (loaded from 'p')</string>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>kind</key><string>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</integer>
+// CHECK: <key>col</key><integer>4</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>69</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</integer>
+// CHECK: <key>col</key><integer>12</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>1</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Returning from 'getZero'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Returning from 'getZero'</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>69</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>69</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>69</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>69</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>69</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>69</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</integer>
+// CHECK: <key>col</key><integer>16</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// 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>issue_context_kind</key><string>function</string>
+// CHECK: <key>issue_context</key><string>testReturnZero</string>
+// CHECK: <key>issue_hash</key><integer>1</integer>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>69</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>77</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</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>77</integer>
+// CHECK: <key>col</key><integer>12</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</integer>
+// CHECK: <key>col</key><integer>18</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>77</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</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>77</integer>
+// CHECK: <key>col</key><integer>12</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</integer>
+// CHECK: <key>col</key><integer>18</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>77</integer>
+// CHECK: <key>col</key><integer>12</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</integer>
+// CHECK: <key>col</key><integer>18</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>77</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</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>event</string>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</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>77</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</integer>
+// CHECK: <key>col</key><integer>8</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Variable 'a' initialized to a null pointer value</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Variable 'a' 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>77</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>77</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>79</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>79</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>79</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>79</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>79</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>issue_context_kind</key><string>function</string>
+// CHECK: <key>issue_context</key><string>testInitZero</string>
+// CHECK: <key>issue_hash</key><integer>4</integer>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>79</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>85</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</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>85</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</integer>
+// CHECK: <key>col</key><integer>13</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>85</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</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>85</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</integer>
+// CHECK: <key>col</key><integer>13</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>85</integer>
+// CHECK: <key>col</key><integer>7</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</integer>
+// CHECK: <key>col</key><integer>13</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>85</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</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>85</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>85</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</integer>
+// CHECK: <key>col</key><integer>15</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Null pointer value stored to 'a'</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Null pointer value stored to 'a'</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>85</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>85</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>87</integer>
+// CHECK: <key>col</key><integer>3</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>87</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>87</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>87</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>87</integer>
+// CHECK: <key>col</key><integer>4</integer>
+// CHECK: <key>file</key><integer>0</integer>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: </array>
+// CHECK: <key>depth</key><integer>0</integer>
+// CHECK: <key>extended_message</key>
+// CHECK: <string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: <key>message</key>
+// CHECK: <string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: </dict>
+// CHECK: </array>
+// CHECK: <key>description</key><string>Dereference of null pointer (loaded from variable 'a')</string>
+// CHECK: <key>category</key><string>Logic error</string>
+// CHECK: <key>type</key><string>Dereference of null pointer</string>
+// CHECK: <key>issue_context_kind</key><string>function</string>
+// CHECK: <key>issue_context</key><string>testStoreZero</string>
+// CHECK: <key>issue_hash</key><integer>4</integer>
+// CHECK: <key>location</key>
+// CHECK: <dict>
+// CHECK: <key>line</key><integer>87</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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