Revert "[XRay][compiler-rt] XRay Flight Data Recorder Mode"

This reverts rL290852 as it breaks aarch64 and arm.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@290854 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 21 deletions

diff --git a/lib/xray/xray_buffer_queue.cc b/lib/xray/xray_buffer_queue.cc
index bd8f4961e..7e5462fb8 100644
--- a/lib/xray/xray_buffer_queue.cc
+++ b/lib/xray/xray_buffer_queue.cc
@@ -18,21 +18,15 @@
 
 using namespace __xray;
 
-BufferQueue::BufferQueue(std::size_t B, std::size_t N, bool &Success)
+BufferQueue::BufferQueue(std::size_t B, std::size_t N)
     : BufferSize(B), Buffers(N), Mutex(), OwnedBuffers(), Finalizing(false) {
-  for (auto &T : Buffers) {
+  for (auto &Buf : Buffers) {
     void *Tmp = malloc(BufferSize);
-    if (Tmp == nullptr) {
-      Success = false;
-      return;
-    }
-
-    auto &Buf = std::get<0>(T);
     Buf.Buffer = Tmp;
     Buf.Size = B;
-    OwnedBuffers.emplace(Tmp);
+    if (Tmp != 0)
+      OwnedBuffers.insert(Tmp);
   }
-  Success = true;
 }
 
 std::error_code BufferQueue::getBuffer(Buffer &Buf) {
@@ -41,11 +35,7 @@ std::error_code BufferQueue::getBuffer(Buffer &Buf) {
   std::lock_guard<std::mutex> Guard(Mutex);
   if (Buffers.empty())
     return std::make_error_code(std::errc::not_enough_memory);
-  auto &T = Buffers.front();
-  auto &B = std::get<0>(T);
-  Buf = B;
-  B.Buffer = nullptr;
-  B.Size = 0;
+  Buf = Buffers.front();
   Buffers.pop_front();
   return {};
 }
@@ -54,11 +44,9 @@ std::error_code BufferQueue::releaseBuffer(Buffer &Buf) {
   if (OwnedBuffers.count(Buf.Buffer) == 0)
     return std::make_error_code(std::errc::argument_out_of_domain);
   std::lock_guard<std::mutex> Guard(Mutex);
-
-  // Now that the buffer has been released, we mark it as "used".
-  Buffers.emplace(Buffers.end(), Buf, true /* used */);
+  Buffers.push_back(Buf);
   Buf.Buffer = nullptr;
-  Buf.Size = 0;
+  Buf.Size = BufferSize;
   return {};
 }
 
@@ -69,8 +57,9 @@ std::error_code BufferQueue::finalize() {
 }
 
 BufferQueue::~BufferQueue() {
-  for (auto &T : Buffers) {
-    auto &Buf = std::get<0>(T);
+  for (auto &Buf : Buffers) {
     free(Buf.Buffer);
+    Buf.Buffer = nullptr;
+    Buf.Size = 0;
   }
 }