libsanitizer merge from upstream r250806.

libsanitizer/

2015-10-20  Maxim Ostapenko  <m.ostapenko@partner.samsung.com>

	* All source files: Merge from upstream r250806.
	* configure.ac (link_sanitizer_common): Add -lrt flag.
	* configure.tgt: Enable TSAN and LSAN for aarch64-linux targets.
	Set CXX_ABI_NEEDED=true for darwin.
	* asan/Makefile.am (asan_files): Add new files.
	(DEFS): Add DCAN_SANITIZE_UB=0 and remove unused and legacy
	DASAN_FLEXIBLE_MAPPING_AND_OFFSET=0.
	* asan/Makefile.in: Regenerate.
	* ubsan/Makefile.am (ubsan_files): Add new files.
	(DEFS): Add DCAN_SANITIZE_UB=1.
	(libubsan_la_LIBADD): Add -lc++abi if CXX_ABI_NEEDED is true.
	* ubsan/Makefile.in: Regenerate.
	* tsan/Makefile.am (tsan_files): Add new files.
	(DEFS): Add DCAN_SANITIZE_UB=0.
	* tsan/Makefile.in: Regenerate.
	* sanitizer_common/Makefile.am (sanitizer_common_files): Add new files.
	* sanitizer_common/Makefile.in: Regenerate.
	* asan/libtool-version: Bump the libasan SONAME.

From-SVN: r229111

1 files changed, 108 insertions, 0 deletions

diff --git a/libsanitizer/asan/asan_suppressions.cc b/libsanitizer/asan/asan_suppressions.cc
new file mode 100644
index 00000000000..c94fff0500a
--- /dev/null
+++ b/libsanitizer/asan/asan_suppressions.cc
@@ -0,0 +1,108 @@
+//===-- asan_suppressions.cc ----------------------------------------------===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// Issue suppression and suppression-related functions.
+//===----------------------------------------------------------------------===//
+
+#include "asan_suppressions.h"
+
+#include "asan_stack.h"
+#include "sanitizer_common/sanitizer_placement_new.h"
+#include "sanitizer_common/sanitizer_suppressions.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
+
+namespace __asan {
+
+ALIGNED(64) static char suppression_placeholder[sizeof(SuppressionContext)];
+static SuppressionContext *suppression_ctx = nullptr;
+static const char kInterceptorName[] = "interceptor_name";
+static const char kInterceptorViaFunction[] = "interceptor_via_fun";
+static const char kInterceptorViaLibrary[] = "interceptor_via_lib";
+static const char kODRViolation[] = "odr_violation";
+static const char *kSuppressionTypes[] = {
+    kInterceptorName, kInterceptorViaFunction, kInterceptorViaLibrary,
+    kODRViolation};
+
+extern "C" {
+#if SANITIZER_SUPPORTS_WEAK_HOOKS
+SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+const char *__asan_default_suppressions();
+#else
+// No week hooks, provide empty implementation.
+const char *__asan_default_suppressions() { return ""; }
+#endif  // SANITIZER_SUPPORTS_WEAK_HOOKS
+}  // extern "C"
+
+void InitializeSuppressions() {
+  CHECK_EQ(nullptr, suppression_ctx);
+  suppression_ctx = new (suppression_placeholder)  // NOLINT
+      SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes));
+  suppression_ctx->ParseFromFile(flags()->suppressions);
+  if (&__asan_default_suppressions)
+    suppression_ctx->Parse(__asan_default_suppressions());
+}
+
+bool IsInterceptorSuppressed(const char *interceptor_name) {
+  CHECK(suppression_ctx);
+  Suppression *s;
+  // Match "interceptor_name" suppressions.
+  return suppression_ctx->Match(interceptor_name, kInterceptorName, &s);
+}
+
+bool HaveStackTraceBasedSuppressions() {
+  CHECK(suppression_ctx);
+  return suppression_ctx->HasSuppressionType(kInterceptorViaFunction) ||
+         suppression_ctx->HasSuppressionType(kInterceptorViaLibrary);
+}
+
+bool IsODRViolationSuppressed(const char *global_var_name) {
+  CHECK(suppression_ctx);
+  Suppression *s;
+  // Match "odr_violation" suppressions.
+  return suppression_ctx->Match(global_var_name, kODRViolation, &s);
+}
+
+bool IsStackTraceSuppressed(const StackTrace *stack) {
+  if (!HaveStackTraceBasedSuppressions())
+    return false;
+
+  CHECK(suppression_ctx);
+  Symbolizer *symbolizer = Symbolizer::GetOrInit();
+  Suppression *s;
+  for (uptr i = 0; i < stack->size && stack->trace[i]; i++) {
+    uptr addr = stack->trace[i];
+
+    if (suppression_ctx->HasSuppressionType(kInterceptorViaLibrary)) {
+      // Match "interceptor_via_lib" suppressions.
+      if (const char *module_name = symbolizer->GetModuleNameForPc(addr))
+        if (suppression_ctx->Match(module_name, kInterceptorViaLibrary, &s))
+          return true;
+    }
+
+    if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) {
+      SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
+      for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
+        const char *function_name = cur->info.function;
+        if (!function_name) {
+          continue;
+        }
+        // Match "interceptor_via_fun" suppressions.
+        if (suppression_ctx->Match(function_name, kInterceptorViaFunction,
+                                   &s)) {
+          frames->ClearAll();
+          return true;
+        }
+      }
+      frames->ClearAll();
+    }
+  }
+  return false;
+}
+
+} // namespace __asan