Revert "[TSanRuntime] Upstream thread swift race detector."

Sometimes it's easier to resolve merge conflict than arguing.

llvm-svn: 370385

lldb/source/Plugins/InstrumentationRuntime/TSan/TSanRuntime.cpp

@@ -88,7 +88,6 @@ extern "C"
     // TODO: dlsym won't work on Windows.
     void *dlsym(void* handle, const char* symbol);
     int (*ptr__tsan_get_report_loc_object_type)(void *report, unsigned long idx, const char **object_type);
-    int (*ptr__tsan_get_report_tag)(void *report, unsigned long *tag);
 }
 
 const int REPORT_TRACE_SIZE = 128;
@@ -98,7 +97,6 @@ struct data {
     void *report;
     const char *description;
     int report_count;
-    unsigned long tag;
     
     void *sleep_trace[REPORT_TRACE_SIZE];
     
@@ -165,14 +163,10 @@ const char *thread_sanitizer_retrieve_report_data_command = R"(
 data t = {0};
 
 ptr__tsan_get_report_loc_object_type = (typeof(ptr__tsan_get_report_loc_object_type))(void *)dlsym((void*)-2 /*RTLD_DEFAULT*/, "__tsan_get_report_loc_object_type");
-ptr__tsan_get_report_tag = (typeof(ptr__tsan_get_report_tag))(void *)dlsym((void*)-2 /*RTLD_DEFAULT*/, "__tsan_get_report_tag");
 
 t.report = __tsan_get_current_report();
 __tsan_get_report_data(t.report, &t.description, &t.report_count, &t.stack_count, &t.mop_count, &t.loc_count, &t.mutex_count, &t.thread_count, &t.unique_tid_count, t.sleep_trace, REPORT_TRACE_SIZE);
 
-if (ptr__tsan_get_report_tag)
-    ptr__tsan_get_report_tag(t.report, &t.tag);
-
 if (t.stack_count > REPORT_ARRAY_SIZE) t.stack_count = REPORT_ARRAY_SIZE;
 for (int i = 0; i < t.stack_count; i++) {
     t.stacks[i].idx = i;
@@ -353,9 +347,6 @@ ThreadSanitizerRuntime::RetrieveReportData(ExecutionContextRef exe_ctx_ref) {
                            ->GetValueAsUnsigned(0));
   dict->AddItem("sleep_trace", StructuredData::ObjectSP(CreateStackTrace(
                                    main_value, ".sleep_trace")));
-  dict->AddIntegerItem(
-      "tag",
-      main_value->GetValueForExpressionPath(".tag")->GetValueAsUnsigned(0));
 
   StructuredData::Array *stacks = ConvertToStructuredArray(
       main_value, ".stacks", ".stack_count",
@@ -494,8 +485,8 @@ ThreadSanitizerRuntime::RetrieveReportData(ExecutionContextRef exe_ctx_ref) {
   return StructuredData::ObjectSP(dict);
 }
 
-std::string ThreadSanitizerRuntime::FormatDescription(
-    StructuredData::ObjectSP report, bool &is_swift_access_race) {
+std::string
+ThreadSanitizerRuntime::FormatDescription(StructuredData::ObjectSP report) {
   std::string description = report->GetAsDictionary()
                                 ->GetValueForKey("issue_type")
                                 ->GetAsString()
@@ -530,18 +521,8 @@ std::string ThreadSanitizerRuntime::FormatDescription(
   } else if (description == "lock-order-inversion") {
     return "Lock order inversion (potential deadlock)";
   } else if (description == "external-race") {
-    auto tag = report->GetAsDictionary()
-                   ->GetValueForKey("tag")
-                   ->GetAsInteger()
-                   ->GetValue();
-    static const unsigned long kSwiftAccessRaceTag = 0x1;
-    if (tag == kSwiftAccessRaceTag) {
-      is_swift_access_race = true;
-      return "Swift access race";
-    }
     return "Race on a library object";
   } else if (description == "swift-access-race") {
-    is_swift_access_race = true;
     return "Swift access race";
   }
 
@@ -635,14 +616,9 @@ ThreadSanitizerRuntime::GenerateSummary(StructuredData::ObjectSP report) {
                             ->GetValueForKey("description")
                             ->GetAsString()
                             ->GetValue();
-  bool is_swift_access_race = report->GetAsDictionary()
-                                  ->GetValueForKey("is_swift_access_race")
-                                  ->GetAsBoolean()
-                                  ->GetValue();
-
   bool skip_one_frame =
-      (report->GetObjectForDotSeparatedPath("issue_type")->GetStringValue() ==
-      "external-race") && (!is_swift_access_race);
+      report->GetObjectForDotSeparatedPath("issue_type")->GetStringValue() ==
+      "external-race";
 
   addr_t pc = 0;
   if (report->GetAsDictionary()
@@ -834,12 +810,8 @@ bool ThreadSanitizerRuntime::NotifyBreakpointHit(
       instance->RetrieveReportData(context->exe_ctx_ref);
   std::string stop_reason_description;
   if (report) {
-    bool is_swift_access_race = false;
-    std::string issue_description =
-        instance->FormatDescription(report, is_swift_access_race);
+    std::string issue_description = instance->FormatDescription(report);
     report->GetAsDictionary()->AddStringItem("description", issue_description);
-    report->GetAsDictionary()->AddBooleanItem("is_swift_access_race",
-                                              is_swift_access_race);
     stop_reason_description = issue_description + " detected";
     report->GetAsDictionary()->AddStringItem("stop_description",
                                              stop_reason_description);

lldb/source/Plugins/InstrumentationRuntime/TSan/TSanRuntime.h

@@ -61,8 +61,7 @@ private:
 
   StructuredData::ObjectSP RetrieveReportData(ExecutionContextRef exe_ctx_ref);
 
-  std::string FormatDescription(StructuredData::ObjectSP report,
-                                bool &is_swift_access_race);
+  std::string FormatDescription(StructuredData::ObjectSP report);
 
   std::string GenerateSummary(StructuredData::ObjectSP report);