Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 164 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Target/SectionLoadHistory.cpp b/gnu/llvm/lldb/source/Target/SectionLoadHistory.cpp
new file mode 100644
index 00000000000..ec16b58b445
--- /dev/null
+++ b/gnu/llvm/lldb/source/Target/SectionLoadHistory.cpp
@@ -0,0 +1,164 @@
+//===-- SectionLoadHistory.cpp ----------------------------------*- C++ -*-===//
+//
+// 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 "lldb/Target/SectionLoadHistory.h"
+
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Utility/Stream.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+bool SectionLoadHistory::IsEmpty() const {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  return m_stop_id_to_section_load_list.empty();
+}
+
+void SectionLoadHistory::Clear() {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  m_stop_id_to_section_load_list.clear();
+}
+
+uint32_t SectionLoadHistory::GetLastStopID() const {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  if (m_stop_id_to_section_load_list.empty())
+    return 0;
+  else
+    return m_stop_id_to_section_load_list.rbegin()->first;
+}
+
+SectionLoadList *
+SectionLoadHistory::GetSectionLoadListForStopID(uint32_t stop_id,
+                                                bool read_only) {
+  if (!m_stop_id_to_section_load_list.empty()) {
+    if (read_only) {
+      // The section load list is for reading data only so we don't need to
+      // create a new SectionLoadList for the current stop ID, just return the
+      // section load list for the stop ID that is equal to or less than the
+      // current stop ID
+      if (stop_id == eStopIDNow) {
+        // If we are asking for the latest and greatest value, it is always at
+        // the end of our list because that will be the highest stop ID.
+        StopIDToSectionLoadList::reverse_iterator rpos =
+            m_stop_id_to_section_load_list.rbegin();
+        return rpos->second.get();
+      } else {
+        StopIDToSectionLoadList::iterator pos =
+            m_stop_id_to_section_load_list.lower_bound(stop_id);
+        if (pos != m_stop_id_to_section_load_list.end() &&
+            pos->first == stop_id)
+          return pos->second.get();
+        else if (pos != m_stop_id_to_section_load_list.begin()) {
+          --pos;
+          return pos->second.get();
+        }
+      }
+    } else {
+      // You can only use "eStopIDNow" when reading from the section load
+      // history
+      assert(stop_id != eStopIDNow);
+
+      // We are updating the section load list (not read only), so if the stop
+      // ID passed in isn't the same as the last stop ID in our collection,
+      // then create a new node using the current stop ID
+      StopIDToSectionLoadList::iterator pos =
+          m_stop_id_to_section_load_list.lower_bound(stop_id);
+      if (pos != m_stop_id_to_section_load_list.end() &&
+          pos->first == stop_id) {
+        // We already have an entry for this value
+        return pos->second.get();
+      }
+
+      // We must make a new section load list that is based on the last valid
+      // section load list, so here we copy the last section load list and add
+      // a new node for the current stop ID.
+      StopIDToSectionLoadList::reverse_iterator rpos =
+          m_stop_id_to_section_load_list.rbegin();
+      SectionLoadListSP section_load_list_sp(
+          new SectionLoadList(*rpos->second));
+      m_stop_id_to_section_load_list[stop_id] = section_load_list_sp;
+      return section_load_list_sp.get();
+    }
+  }
+  SectionLoadListSP section_load_list_sp(new SectionLoadList());
+  if (stop_id == eStopIDNow)
+    stop_id = 0;
+  m_stop_id_to_section_load_list[stop_id] = section_load_list_sp;
+  return section_load_list_sp.get();
+}
+
+SectionLoadList &SectionLoadHistory::GetCurrentSectionLoadList() {
+  const bool read_only = true;
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(eStopIDNow, read_only);
+  assert(section_load_list != nullptr);
+  return *section_load_list;
+}
+
+addr_t
+SectionLoadHistory::GetSectionLoadAddress(uint32_t stop_id,
+                                          const lldb::SectionSP &section_sp) {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  const bool read_only = true;
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(stop_id, read_only);
+  return section_load_list->GetSectionLoadAddress(section_sp);
+}
+
+bool SectionLoadHistory::ResolveLoadAddress(uint32_t stop_id, addr_t load_addr,
+                                            Address &so_addr) {
+  // First find the top level section that this load address exists in
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  const bool read_only = true;
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(stop_id, read_only);
+  return section_load_list->ResolveLoadAddress(load_addr, so_addr);
+}
+
+bool SectionLoadHistory::SetSectionLoadAddress(
+    uint32_t stop_id, const lldb::SectionSP &section_sp, addr_t load_addr,
+    bool warn_multiple) {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  const bool read_only = false;
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(stop_id, read_only);
+  return section_load_list->SetSectionLoadAddress(section_sp, load_addr,
+                                                  warn_multiple);
+}
+
+size_t
+SectionLoadHistory::SetSectionUnloaded(uint32_t stop_id,
+                                       const lldb::SectionSP &section_sp) {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  const bool read_only = false;
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(stop_id, read_only);
+  return section_load_list->SetSectionUnloaded(section_sp);
+}
+
+bool SectionLoadHistory::SetSectionUnloaded(uint32_t stop_id,
+                                            const lldb::SectionSP &section_sp,
+                                            addr_t load_addr) {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  const bool read_only = false;
+  SectionLoadList *section_load_list =
+      GetSectionLoadListForStopID(stop_id, read_only);
+  return section_load_list->SetSectionUnloaded(section_sp, load_addr);
+}
+
+void SectionLoadHistory::Dump(Stream &s, Target *target) {
+  std::lock_guard<std::recursive_mutex> guard(m_mutex);
+  StopIDToSectionLoadList::iterator pos,
+      end = m_stop_id_to_section_load_list.end();
+  for (pos = m_stop_id_to_section_load_list.begin(); pos != end; ++pos) {
+    s.Printf("StopID = %u:\n", pos->first);
+    pos->second->Dump(s, target);
+    s.EOL();
+  }
+}