[Sanitizer] Drop LibIgnore dependency on SuppressionContext. NFC.

Let each LibIgnore user (for now it's only TSan) manually go
through SuppressionContext and pass ignored library templates to
LibIgnore.

llvm-svn: 229924

compiler-rt/lib/sanitizer_common/sanitizer_libignore.cc

@@ -19,24 +19,18 @@ namespace __sanitizer {
 LibIgnore::LibIgnore(LinkerInitialized) {
 }
 
-void LibIgnore::Init(const SuppressionContext &supp) {
+void LibIgnore::AddIgnoredLibrary(const char *name_templ) {
   BlockingMutexLock lock(&mutex_);
-  CHECK_EQ(count_, 0);
-  const uptr n = supp.SuppressionCount();
-  for (uptr i = 0; i < n; i++) {
-    const Suppression *s = supp.SuppressionAt(i);
-    if (s->type != SuppressionLib)
-      continue;
-    if (count_ >= kMaxLibs) {
-      Report("%s: too many called_from_lib suppressions (max: %d)\n",
-             SanitizerToolName, kMaxLibs);
-      Die();
-    }
-    Lib *lib = &libs_[count_++];
-    lib->templ = internal_strdup(s->templ);
-    lib->name = 0;
-    lib->loaded = false;
+  if (count_ >= kMaxLibs) {
+    Report("%s: too many ignored libraries (max: %d)\n", SanitizerToolName,
+           kMaxLibs);
+    Die();
   }
+  Lib *lib = &libs_[count_++];
+  lib->templ = internal_strdup(name_templ);
+  lib->name = nullptr;
+  lib->real_name = nullptr;
+  lib->loaded = false;
 }
 
 void LibIgnore::OnLibraryLoaded(const char *name) {

compiler-rt/lib/sanitizer_common/sanitizer_libignore.h

@@ -8,8 +8,8 @@
 //===----------------------------------------------------------------------===//
 //
 // LibIgnore allows to ignore all interceptors called from a particular set
-// of dynamic libraries. LibIgnore remembers all "called_from_lib" suppressions
-// from the provided SuppressionContext; finds code ranges for the libraries;
+// of dynamic libraries. LibIgnore can be initialized with several templates
+// of names of libraries to be ignored. It finds code ranges for the libraries;
 // and checks whether the provided PC value belongs to the code ranges.
 //
 //===----------------------------------------------------------------------===//
@@ -19,7 +19,6 @@
 
 #include "sanitizer_internal_defs.h"
 #include "sanitizer_common.h"
-#include "sanitizer_suppressions.h"
 #include "sanitizer_atomic.h"
 #include "sanitizer_mutex.h"
 
@@ -29,8 +28,8 @@ class LibIgnore {
  public:
   explicit LibIgnore(LinkerInitialized);
 
-  // Fetches all "called_from_lib" suppressions from the SuppressionContext.
-  void Init(const SuppressionContext &supp);
+  // Must be called during initialization.
+  void AddIgnoredLibrary(const char *name_templ);
 
   // Must be called after a new dynamic library is loaded.
   void OnLibraryLoaded(const char *name);

compiler-rt/lib/tsan/rtl/tsan_interceptors.cc

@@ -157,7 +157,13 @@ static LibIgnore *libignore() {
 }
 
 void InitializeLibIgnore() {
-  libignore()->Init(*SuppressionContext::Get());
+  const SuppressionContext &supp = *SuppressionContext::Get();
+  const uptr n = supp.SuppressionCount();
+  for (uptr i = 0; i < n; i++) {
+    const Suppression *s = supp.SuppressionAt(i);
+    if (s->type == SuppressionLib)
+      libignore()->AddIgnoredLibrary(s->templ);
+  }
   libignore()->OnLibraryLoaded(0);
 }