Merge pull request #506 from delcypher/travis_asan_ubsan

Modify scripts and a test to allow ASan/UBSan builds.

1 files changed, 65 insertions, 0 deletions

diff --git a/lib/Support/MemoryUsage.cpp b/lib/Support/MemoryUsage.cpp
index d141593a..f1757ad3 100644
--- a/lib/Support/MemoryUsage.cpp
+++ b/lib/Support/MemoryUsage.cpp
@@ -22,9 +22,74 @@
 #include <malloc/malloc.h>
 #endif
 
+// ASan Support
+//
+// When building with ASan the `mallinfo()` function is intercepted and always
+// reports zero so we can't use that to report KLEE's memory usage. Instead we
+// will use ASan's public interface to query how much memory has been
+// allocated.
+//
+// Unfortunately the interface is dependent on the compiler version. It is also
+// unfortunate that the way to detect compilation with ASan differs between
+// compilers. The preprocessor code below tries to determine if ASan is enabled
+// and if so which interface should be used.
+//
+// If ASan is enabled the `KLEE_ASAN_BUILD` macro will be defined other it will
+// be undefined. If `KLEE_ASAN_BUILD` is defined then the
+// `ASAN_GET_ALLOCATED_MEM_FUNCTION` macro will defined to the name of the ASan
+// function that can be called to get memory allocation
+
+// Make sure we start with the macro being undefined.
+#undef KLEE_ASAN_BUILD
+
+// Clang and ASan
+#if defined(__has_feature)
+#  if __has_feature(address_sanitizer)
+#     if __has_include("sanitizer/allocator_interface.h")
+#       include <sanitizer/allocator_interface.h>
+        // Modern interface
+#       define ASAN_GET_ALLOCATED_MEM_FUNCTION __sanitizer_get_current_allocated_bytes
+#     else
+#       include <sanitizer/asan_interface.h>
+        // Deprecated interface.
+#       define ASAN_GET_ALLOCATED_MEM_FUNCTION __asan_get_current_allocated_bytes
+#     endif /* has_include("sanitizer/allocator_interface.h") */
+#    define KLEE_ASAN_BUILD
+#  endif /* __has_feature(address_sanitizer) */
+#endif /* defined(__has_feature) */
+
+// For GCC and ASan
+#ifndef KLEE_ASAN_BUILD
+#  if defined(__SANITIZE_ADDRESS__)
+     // HACK: GCC doesn't ship `allocator_interface.h`  or `asan_interface.h` so
+     // just provide the proto-types here.
+     extern "C" {
+       size_t __sanitizer_get_current_allocated_bytes();
+       size_t __asan_get_current_allocated_bytes(); // Deprecated.
+     }
+     // HACK: Guess which function to use based on GCC version
+#    if __GNUC__ > 4
+       // Tested with gcc 5.2, 5.4, and 6.2.1
+       // Modern interface
+#      define ASAN_GET_ALLOCATED_MEM_FUNCTION __sanitizer_get_current_allocated_bytes
+#    else
+       // Tested with gcc 4.8 and 4.9
+       // Deprecated interface
+#      define ASAN_GET_ALLOCATED_MEM_FUNCTION __asan_get_current_allocated_bytes
+#    endif
+#    define KLEE_ASAN_BUILD
+#  endif /* defined(__SANITIZE_ADDRESS__) */
+#endif /* ndef KLEE_ASAN_BUILD */
+
 using namespace klee;
 
 size_t util::GetTotalMallocUsage() {
+#ifdef KLEE_ASAN_BUILD
+  // When building with ASan on Linux `mallinfo()` just returns 0 so use ASan runtime
+  // function instead to get used memory.
+  return ASAN_GET_ALLOCATED_MEM_FUNCTION();
+#endif
+
 #ifdef HAVE_GPERFTOOLS_MALLOC_EXTENSION_H
   size_t value = 0;
   MallocExtension::instance()->GetNumericProperty(