clang/test/Analysis/inlining/eager-reclamation-path-notes.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -analyzer-config graph-trim-interval=5 -analyzer-config suppress-null-return-paths=false -verify %s
   2 // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=plist-multi-file -analyzer-config graph-trim-interval=5 -analyzer-config suppress-null-return-paths=false %s -o %t.plist
   3 // RUN: %normalize_plist <%t.plist | diff -ub %S/Inputs/expected-plists/eager-reclamation-path-notes.cpp.plist -
   4
   5 struct IntWrapper {
   6   int getValue();
   7 };
   8
   9 IntWrapper *getNullWrapper() {
  10   return 0;
  11   // expected-note@-1 {{Returning null pointer}}
  12 }
  13
  14 int memberCallBaseDisappears() {
  15   // In this case, we need the lvalue-to-rvalue cast for 'ptr' to disappear,
  16   // which means we need to trigger reclamation between that and the ->
  17   // operator.
  18   //
  19   // Note that this test is EXTREMELY brittle because it's a negative test:
  20   // we want to show that even if the node for the rvalue of 'ptr' disappears,
  21   // we get the same results as if it doesn't. The test should never fail even
  22   // if our node reclamation policy changes, but it could easily not be testing
  23   // anything at that point.
  24   IntWrapper *ptr = getNullWrapper();
  25   // expected-note@-1 {{Calling 'getNullWrapper'}}
  26   // expected-note@-2 {{Returning from 'getNullWrapper'}}
  27   // expected-note@-3 {{'ptr' initialized to a null pointer value}}
  28
  29   // Burn some nodes to trigger reclamation.
  30   int unused = 1;
  31   (void)unused;
  32
  33   return ptr->getValue(); // expected-warning {{Called C++ object pointer is null}}
  34   // expected-note@-1 {{Called C++ object pointer is null}}
  35 }
  36