first pass at loader portion of new dbgi layer replacement; set up ctrl entity for per-module debug info selection path info

2026-08-01 03:40:02 +00:00 · 2024-05-20 16:28:52 -07:00
parent 49eb834e2b
commit 6e41bdf11b
7 changed files with 871 additions and 1 deletions
@@ -0,0 +1,205 @@
+// Copyright (c) 2024 Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef DI_H
+#define DI_H
+
+////////////////////////////////
+//~ rjf: Cache Types
+
+typedef struct DI_StringChunkNode DI_StringChunkNode;
+struct DI_StringChunkNode
+{
+  DI_StringChunkNode *next;
+  U64 size;
+};
+
+typedef struct DI_Node DI_Node;
+struct DI_Node
+{
+  // rjf: links
+  DI_Node *next;
+  DI_Node *prev;
+  
+  // rjf: metadata
+  U64 ref_count;
+  U64 touch_count;
+  U64 is_working;
+  U64 last_time_requested_us;
+  
+  // rjf: key
+  String8 path;
+  U64 min_timestamp;
+  
+  // rjf: file handles
+  OS_Handle file;
+  OS_Handle file_map;
+  void *file_base;
+  FileProperties file_props;
+  
+  // rjf: parse artifacts
+  Arena *arena;
+  RDI_Parsed rdi;
+  B32 parse_done;
+};
+
+typedef struct DI_Slot DI_Slot;
+struct DI_Slot
+{
+  DI_Node *first;
+  DI_Node *last;
+};
+
+typedef struct DI_Stripe DI_Stripe;
+struct DI_Stripe
+{
+  Arena *arena;
+  DI_Node *free_node;
+  DI_StringChunkNode *free_string_chunks[8];
+  OS_Handle rw_mutex;
+  OS_Handle cv;
+};
+
+////////////////////////////////
+//~ rjf: Scoped Access Types
+
+typedef struct DI_Touch DI_Touch;
+struct DI_Touch
+{
+  DI_Touch *next;
+  DI_Node *node;
+};
+
+typedef struct DI_Scope DI_Scope;
+struct DI_Scope
+{
+  DI_Scope *next;
+  DI_Touch *first_touch;
+  DI_Touch *last_touch;
+};
+
+typedef struct DI_TCTX DI_TCTX;
+struct DI_TCTX
+{
+  Arena *arena;
+  DI_Scope *free_scope;
+  DI_Touch *free_touch;
+};
+
+////////////////////////////////
+//~ rjf: Shared State Types
+
+typedef struct DI_Shared DI_Shared;
+struct DI_Shared
+{
+  Arena *arena;
+  
+  // rjf: node cache
+  U64 slots_count;
+  DI_Slot *slots;
+  U64 stripes_count;
+  DI_Stripe *stripes;
+  
+  // rjf: user -> parse ring
+  OS_Handle u2p_ring_mutex;
+  OS_Handle u2p_ring_cv;
+  U64 u2p_ring_size;
+  U8 *u2p_ring_base;
+  U64 u2p_ring_write_pos;
+  U64 u2p_ring_read_pos;
+  
+  // rjf: threads
+  U64 parse_thread_count;
+  OS_Handle *parse_threads;
+};
+
+////////////////////////////////
+//~ rjf: Globals
+
+global DI_Shared *di_shared = 0;
+thread_static DI_TCTX *di_tctx = 0;
+global RDI_Parsed di_rdi_parsed_nil =
+{
+  0,
+  0,
+  0,
+  0,
+  {0},
+  0,
+  0,
+  0,
+  0,
+  0,
+  0,
+  0,
+  &rdi_binary_section_nil, 1,
+  &rdi_file_path_node_nil, 1,
+  &rdi_source_file_nil, 1,
+  &rdi_unit_nil, 1,
+  &rdi_vmap_entry_nil, 1,
+  &rdi_type_node_nil, 1,
+  &rdi_udt_nil, 1,
+  &rdi_member_nil, 1,
+  &rdi_enum_member_nil, 1,
+  &rdi_global_variable_nil, 1,
+  &rdi_vmap_entry_nil, 1,
+  &rdi_thread_variable_nil, 1,
+  &rdi_procedure_nil, 1,
+  &rdi_scope_nil, 1,
+  &rdi_voff_nil, 1,
+  &rdi_vmap_entry_nil, 1,
+  &rdi_local_nil, 1,
+  &rdi_location_block_nil, 1,
+  0, 0,
+  0, 0,
+};
+
+////////////////////////////////
+//~ rjf: Basic Helpers
+
+internal U64 di_hash_from_string(String8 string);
+
+////////////////////////////////
+//~ rjf: Main Layer Initialization
+
+internal void di_init(void);
+
+////////////////////////////////
+//~ rjf: Scope Functions
+
+internal DI_Scope *di_scope_open(void);
+internal void di_scope_close(DI_Scope *scope);
+internal void di_scope_touch_node__stripe_mutex_r_guarded(DI_Scope *scope, DI_Node *node);
+
+////////////////////////////////
+//~ rjf: Per-Slot Functions
+
+internal DI_Node *di_node_from_path_min_timestamp_slot__stripe_mutex_r_guarded(DI_Slot *slot, String8 path, U64 min_timestamp);
+
+////////////////////////////////
+//~ rjf: Per-Stripe Functions
+
+internal U64 di_string_bucket_idx_from_string_size(U64 size);
+internal String8 di_string_alloc__stripe_mutex_w_guarded(DI_Stripe *stripe, String8 string);
+internal void di_string_release__stripe_mutex_w_guarded(DI_Stripe *stripe, String8 string);
+
+////////////////////////////////
+//~ rjf: Key Opening/Closing
+
+internal void di_open(String8 path, U64 min_timestamp);
+internal void di_close(String8 path, U64 min_timestamp);
+
+////////////////////////////////
+//~ rjf: Cache Lookups
+
+internal RDI_Parsed *di_rdi_from_path_min_timestamp(DI_Scope *scope, String8 path, U64 min_timestamp, U64 endt_us);
+
+////////////////////////////////
+//~ rjf: Parse Threads
+
+internal B32 di_u2p_enqueue_key(String8 path, U64 min_timestamp, U64 endt_us);
+internal void di_u2p_dequeue_key(Arena *arena, String8 *out_path, U64 *out_min_timestamp);
+
+internal void di_parse_thread__entry_point(void *p);
+
+#endif // DI_H