src/node_postmortem_metadata.cc - main - githubmirror/node

src/node_postmortem_metadata.cc
79 строк4 KB
Anna Henningsen
src: make AsyncWrap subclass internal field counts explicit
06 мар 2026, 19:44
06 мар 2026, 19:44b872cc2
#include "base_object-inl.h"
#include "env.h"
#include "handle_wrap.h"
#include "node_context_data.h"
#include "req_wrap.h"
#include "util-inl.h"

#define NODE_OFF_EXTSTR_DATA sizeof(void*)

#define NODEDBG_SYMBOL(Name)  nodedbg_ ## Name

// nodedbg_offset_CLASS__MEMBER__TYPE: Describes the offset to a class member.
#define NODEDBG_OFFSET(Class, Member, Type) \
    NODEDBG_SYMBOL(offset_ ## Class ## __ ## Member ## __ ## Type)

// These are the constants describing Node internal structures. Every constant
// should use the format described above.  These constants are declared as
// global integers so that they'll be present in the generated node binary. They
// also need to be declared outside any namespace to avoid C++ name-mangling.
#define NODE_OFFSET_POSTMORTEM_METADATA(V)                                    \
  V(BaseObject, persistent_handle_, v8_Persistent_v8_Object,                  \
    BaseObject::persistent_handle_)                                           \
  V(Environment, handle_wrap_queue_, Environment_HandleWrapQueue,             \
    Environment::handle_wrap_queue_)                                          \
  V(Environment, req_wrap_queue_, Environment_ReqWrapQueue,                   \
    Environment::req_wrap_queue_)                                             \
  V(HandleWrap, handle_wrap_queue_, ListNode_HandleWrap,                      \
    HandleWrap::handle_wrap_queue_)                                           \
  V(Environment_HandleWrapQueue, head_, ListNode_HandleWrap,                  \
    Environment::HandleWrapQueue::head_)                                      \
  V(ListNode_HandleWrap, prev_, uintptr_t, ListNode<HandleWrap>::prev_)       \
  V(ListNode_HandleWrap, next_, uintptr_t, ListNode<HandleWrap>::next_)       \
  V(Environment_ReqWrapQueue, head_, ListNode_ReqWrapQueue,                   \
    Environment::ReqWrapQueue::head_)                                         \
  V(ListNode_ReqWrap, prev_, uintptr_t, ListNode<ReqWrapBase>::prev_)         \
  V(ListNode_ReqWrap, next_, uintptr_t, ListNode<ReqWrapBase>::next_)

extern "C" {
int nodedbg_const_ContextEmbedderIndex__kEnvironment__int;
int nodedbg_const_BaseObject__kInternalFieldCount__int;
int nodedbg_const_HandleWrap__kInternalFieldCount__int;
int nodedbg_const_ReqWrap__kInternalFieldCount__int;
uintptr_t nodedbg_offset_ExternalString__data__uintptr_t;
uintptr_t nodedbg_offset_ReqWrap__req_wrap_queue___ListNode_ReqWrapQueue;

#define V(Class, Member, Type, Accessor)                                      \
  NODE_EXTERN uintptr_t NODEDBG_OFFSET(Class, Member, Type);
  NODE_OFFSET_POSTMORTEM_METADATA(V)
#undef V
}

namespace node {

int GenDebugSymbols() {
  nodedbg_const_ContextEmbedderIndex__kEnvironment__int =
      ContextEmbedderIndex::kEnvironment;
  nodedbg_const_BaseObject__kInternalFieldCount__int =
      BaseObject::kInternalFieldCount;
  nodedbg_const_HandleWrap__kInternalFieldCount__int =
      HandleWrap::kInternalFieldCount;
  nodedbg_const_ReqWrap__kInternalFieldCount__int =
      ReqWrap<uv_req_t>::kInternalFieldCount;

  nodedbg_offset_ExternalString__data__uintptr_t = NODE_OFF_EXTSTR_DATA;
  nodedbg_offset_ReqWrap__req_wrap_queue___ListNode_ReqWrapQueue =
      OffsetOf<ListNode<ReqWrapBase>, ReqWrap<uv_req_t>>(
          &ReqWrap<uv_req_t>::req_wrap_queue_);

  #define V(Class, Member, Type, Accessor)                                    \
    NODEDBG_OFFSET(Class, Member, Type) = OffsetOf(&Accessor);
    NODE_OFFSET_POSTMORTEM_METADATA(V)
  #undef V

  return 1;
}

const int debug_symbols_generated = GenDebugSymbols();

}  // namespace node