1 files changed, 123 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Breakpoint/WatchpointResource.cpp b/contrib/llvm-project/lldb/source/Breakpoint/WatchpointResource.cpp
new file mode 100644
index 000000000000..fa0442997b52
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Breakpoint/WatchpointResource.cpp
@@ -0,0 +1,123 @@
+//===-- WatchpointResource.cpp --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <assert.h>
+
+#include "lldb/Breakpoint/WatchpointResource.h"
+#include "lldb/Utility/Stream.h"
+
+#include <algorithm>
+
+using namespace lldb;
+using namespace lldb_private;
+
+WatchpointResource::WatchpointResource(lldb::addr_t addr, size_t size,
+                                       bool read, bool write)
+    : m_id(GetNextID()), m_addr(addr), m_size(size),
+      m_watch_read(read), m_watch_write(write) {}
+
+WatchpointResource::~WatchpointResource() {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  m_constituents.clear();
+}
+
+addr_t WatchpointResource::GetLoadAddress() const { return m_addr; }
+
+size_t WatchpointResource::GetByteSize() const { return m_size; }
+
+bool WatchpointResource::WatchpointResourceRead() const { return m_watch_read; }
+
+bool WatchpointResource::WatchpointResourceWrite() const {
+  return m_watch_write;
+}
+
+void WatchpointResource::SetType(bool read, bool write) {
+  m_watch_read = read;
+  m_watch_write = write;
+}
+
+wp_resource_id_t WatchpointResource::GetID() const { return m_id; }
+
+bool WatchpointResource::Contains(addr_t addr) {
+  if (addr >= m_addr && addr < m_addr + m_size)
+    return true;
+  return false;
+}
+
+void WatchpointResource::AddConstituent(const WatchpointSP &wp_sp) {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  m_constituents.push_back(wp_sp);
+}
+
+void WatchpointResource::RemoveConstituent(WatchpointSP &wp_sp) {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  const auto &it =
+      std::find(m_constituents.begin(), m_constituents.end(), wp_sp);
+  if (it != m_constituents.end())
+    m_constituents.erase(it);
+}
+
+size_t WatchpointResource::GetNumberOfConstituents() {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  return m_constituents.size();
+}
+
+bool WatchpointResource::ConstituentsContains(const WatchpointSP &wp_sp) {
+  return ConstituentsContains(wp_sp.get());
+}
+
+bool WatchpointResource::ConstituentsContains(const Watchpoint *wp) {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  WatchpointCollection::const_iterator match =
+      std::find_if(m_constituents.begin(), m_constituents.end(),
+                   [&wp](const WatchpointSP &x) { return x.get() == wp; });
+  return match != m_constituents.end();
+}
+
+WatchpointSP WatchpointResource::GetConstituentAtIndex(size_t idx) {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  assert(idx < m_constituents.size());
+  if (idx >= m_constituents.size())
+    return {};
+
+  return m_constituents[idx];
+}
+
+WatchpointResource::WatchpointCollection
+WatchpointResource::CopyConstituentsList() {
+  std::lock_guard<std::mutex> guard(m_constituents_mutex);
+  return m_constituents;
+}
+
+bool WatchpointResource::ShouldStop(StoppointCallbackContext *context) {
+  // LWP_TODO: Need to poll all Watchpoint constituents and see if
+  // we should stop, like BreakpointSites do.
+#if 0
+  m_hit_counter.Increment();
+  // ShouldStop can do a lot of work, and might even come back and hit
+  // this breakpoint site again.  So don't hold the m_constituents_mutex the
+  // whole while.  Instead make a local copy of the collection and call
+  // ShouldStop on the copy.
+  WatchpointResourceCollection constituents_copy;
+  {
+    std::lock_guard<std::recursive_mutex> guard(m_constituents_mutex);
+    constituents_copy = m_constituents;
+  }
+  return constituents_copy.ShouldStop(context);
+#endif
+  return true;
+}
+
+void WatchpointResource::Dump(Stream *s) const {
+  s->Printf("addr = 0x%8.8" PRIx64 " size = %zu", m_addr, m_size);
+}
+
+wp_resource_id_t WatchpointResource::GetNextID() {
+  static wp_resource_id_t g_next_id = 0;
+  return ++g_next_id;
+}