Revert "Start reifying error descriptions"

This reverts r279862 to investigate VS failures.

llvm-svn: 279865

4 files changed, 12 insertions, 130 deletions

diff --git a/compiler-rt/lib/asan/CMakeLists.txt b/compiler-rt/lib/asan/CMakeLists.txt
index e37705e0d66..be274df2a6b 100644
--- a/compiler-rt/lib/asan/CMakeLists.txt
+++ b/compiler-rt/lib/asan/CMakeLists.txt
@@ -5,7 +5,6 @@ set(ASAN_SOURCES
   asan_activation.cc
   asan_debugging.cc
   asan_descriptions.cc
-  asan_errors.cc
   asan_fake_stack.cc
   asan_flags.cc
   asan_globals.cc
diff --git a/compiler-rt/lib/asan/asan_errors.cc b/compiler-rt/lib/asan/asan_errors.cc
deleted file mode 100644
index ea30c1cb219..00000000000
--- a/compiler-rt/lib/asan/asan_errors.cc
+++ /dev/null
@@ -1,36 +0,0 @@
-//===-- asan_errors.cc ------------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// 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.
-//
-// ASan implementation for error structures.
-//===----------------------------------------------------------------------===//
-
-#include "asan_errors.h"
-#include "asan_stack.h"
-
-namespace __asan {
-
-void ErrorStackOverflow::Print() {
-  Decorator d;
-  Printf("%s", d.Warning());
-  Report(
-      "ERROR: AddressSanitizer: stack-overflow on address %p"
-      " (pc %p bp %p sp %p T%d)\n",
-      (void *)addr, (void *)pc, (void *)bp, (void *)sp, tid);
-  Printf("%s", d.EndWarning());
-  scariness.Print();
-  BufferedStackTrace stack;
-  GetStackTraceWithPcBpAndContext(&stack, kStackTraceMax, pc, bp, context,
-                                  common_flags()->fast_unwind_on_fatal);
-  stack.Print();
-  ReportErrorSummary("stack-overflow", &stack);
-}
-
-}  // namespace __asan
diff --git a/compiler-rt/lib/asan/asan_errors.h b/compiler-rt/lib/asan/asan_errors.h
deleted file mode 100644
index a41cb2334b5..00000000000
--- a/compiler-rt/lib/asan/asan_errors.h
+++ /dev/null
@@ -1,78 +0,0 @@
-//===-- asan_errors.h -------------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// 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.
-//
-// ASan-private header for error structures.
-//===----------------------------------------------------------------------===//
-#ifndef ASAN_ERRORS_H
-#define ASAN_ERRORS_H
-
-#include "asan_descriptions.h"
-#include "asan_scariness_score.h"
-
-namespace __asan {
-
-struct ErrorBase {
-  ScarinessScore scariness;
-};
-
-struct ErrorStackOverflow : ErrorBase {
-  u32 tid;
-  uptr addr, pc, bp, sp;
-  // ErrorStackOverflow never owns the context.
-  void *context;
-  ErrorStackOverflow(const SignalContext &sig, u32 tid_)
-      : tid(tid_),
-        addr(sig.addr),
-        pc(sig.pc),
-        bp(sig.bp),
-        sp(sig.sp),
-        context(sig.context) {
-    scariness.Scare(10, "stack-overflow");
-  }
-  void Print();
-};
-
-enum ErrorKind {
-  kErrorKindInvalid = 0,
-  kErrorKindStackOverflow,
-};
-
-struct ErrorDescription {
-  ErrorKind kind;
-  // We're using a tagged union because it allows us to have a trivially
-  // copiable type and use the same structures as the public interface.
-  //
-  // We can add a wrapper around it to make it "more c++-like", but that would
-  // add a lot of code and the benefit wouldn't be that big.
-  union {
-    ErrorStackOverflow stack_overflow;
-  };
-  ErrorDescription() { internal_memset(this, 0, sizeof(*this)); }
-  ErrorDescription(const ErrorStackOverflow &e)  // NOLINT
-      : kind(kErrorKindStackOverflow),
-        stack_overflow(e) {}
-
-  bool IsValid() { return kind != kErrorKindInvalid; }
-  void Print() {
-    switch (kind) {
-      case kErrorKindStackOverflow:
-        stack_overflow.Print();
-        return;
-      case kErrorKindInvalid:
-        CHECK(0);
-    }
-    CHECK(0);
-  }
-};
-
-}  // namespace __asan
-
-#endif  // ASAN_ERRORS_H
diff --git a/compiler-rt/lib/asan/asan_report.cc b/compiler-rt/lib/asan/asan_report.cc
index c8395a5c25d..337720e85f4 100644
--- a/compiler-rt/lib/asan/asan_report.cc
+++ b/compiler-rt/lib/asan/asan_report.cc
@@ -12,7 +12,6 @@
 // This file contains error reporting code.
 //===----------------------------------------------------------------------===//
 
-#include "asan_errors.h"
 #include "asan_flags.h"
 #include "asan_descriptions.h"
 #include "asan_internal.h"
@@ -268,8 +267,6 @@ class ScopedInErrorReport {
   }
 
   ~ScopedInErrorReport() {
-    if (current_error_.IsValid()) current_error_.Print();
-
     // Make sure the current thread is announced.
     DescribeThread(GetCurrentThread());
     // We may want to grab this lock again when printing stats.
@@ -304,12 +301,6 @@ class ScopedInErrorReport {
     }
   }
 
-  void ReportError(const ErrorDescription &description) {
-    // Can only report one error per ScopedInErrorReport.
-    CHECK_EQ(current_error_.kind, kErrorKindInvalid);
-    current_error_ = description;
-  }
-
  private:
   void StartReporting(ReportData *report) {
     if (report) report_data = *report;
@@ -328,20 +319,26 @@ class ScopedInErrorReport {
 
   static StaticSpinMutex lock_;
   static u32 reporting_thread_tid_;
-  // Error currently being reported. This enables the destructor to interact
-  // with the debugger and point it to an error description.
-  static ErrorDescription current_error_;
   bool halt_on_error_;
 };
 
 StaticSpinMutex ScopedInErrorReport::lock_;
 u32 ScopedInErrorReport::reporting_thread_tid_ = kInvalidTid;
-ErrorDescription ScopedInErrorReport::current_error_;
 
 void ReportStackOverflow(const SignalContext &sig) {
   ScopedInErrorReport in_report(/*report*/ nullptr, /*fatal*/ true);
-  ErrorStackOverflow error{sig, GetCurrentTidOrInvalid()};  // NOLINT
-  in_report.ReportError(error);
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report(
+      "ERROR: AddressSanitizer: stack-overflow on address %p"
+      " (pc %p bp %p sp %p T%d)\n",
+      (void *)sig.addr, (void *)sig.pc, (void *)sig.bp, (void *)sig.sp,
+      GetCurrentTidOrInvalid());
+  Printf("%s", d.EndWarning());
+  ScarinessScore::PrintSimple(10, "stack-overflow");
+  GET_STACK_TRACE_SIGNAL(sig);
+  stack.Print();
+  ReportErrorSummary("stack-overflow", &stack);
 }
 
 void ReportDeadlySignal(const char *description, const SignalContext &sig) {