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switched to TryRead helper macro for parsing abbrev table and compile units

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Nikita Smith committed 2026-02-05 17:43:19 -08:00
1 parent cd70b7e1ec
commit 4f30f64914
4 files changed
+811 -1042
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src/dwarf/dwarf_parse.h
+72 -74
View File
@@ -175,7 +175,6 @@ typedef struct DW_CompUnit
Rng1U64 info_range;
U64 first_tag_info_off;
DW_AbbrevTable abbrev_table;
String8 abbrev_data;
DW_ListUnit *addr_lu;
DW_ListUnit *str_offsets_lu;
DW_ListUnit *rnglists_lu;
@@ -192,6 +191,8 @@ typedef struct DW_TagTree
U64 tag_count;
} DW_TagTree;
////////////////////////////////
typedef struct DW_LineFile
{
String8 file_name;
@@ -202,42 +203,43 @@ typedef struct DW_LineFile
String8 source;
} DW_LineFile;
typedef struct DW_LineVMFileNode
typedef struct DW_LineFileNode
{
struct DW_LineVMFileNode *next;
DW_LineFile file;
} DW_LineVMFileNode;
struct DW_LineFileNode *next;
DW_LineFile file;
} DW_LineFileNode;
typedef struct DW_LineVMFileList
typedef struct DW_LineFileList
{
U64 node_count;
DW_LineVMFileNode *first;
DW_LineVMFileNode *last;
} DW_LineVMFileList;
U64 node_count;
DW_LineFileNode *first;
DW_LineFileNode *last;
} DW_LineFileList;
typedef struct DW_LineVMFileArray
typedef struct DW_LineFileArray
{
U64 count;
DW_LineFile *v;
} DW_LineVMFileArray;
} DW_LineFileArray;
typedef struct DW_LineVMHeader
{
Rng1U64 unit_range;
DW_Version version;
U8 address_size; // Duplicates size from the compilation unit but is needed to support stripped exe that just have .debug_line and .debug_line_str.
U8 segment_selector_size;
U64 header_length;
U8 min_inst_len;
U8 max_ops_for_inst;
U8 default_is_stmt;
S8 line_base;
U8 line_range;
U8 opcode_base;
U64 num_opcode_lens;
U8 *opcode_lens;
DW_LineVMFileArray dir_table;
DW_LineVMFileArray file_table;
U64 unit_length;
DW_Version version;
U8 address_size; // Duplicates size from the compilation unit but is needed to support stripped exe that just have .debug_line and .debug_line_str.
U8 segment_selector_size;
U64 header_length;
U8 min_inst_len;
U8 max_ops_for_inst;
U8 default_is_stmt;
S8 line_base;
U8 line_range;
U8 opcode_base;
U64 num_opcode_lens;
U8 *opcode_lens;
U64 line_program_off;
String8Array dir_table;
DW_LineFileArray file_table;
} DW_LineVMHeader;
typedef struct DW_LineVMState
@@ -248,10 +250,10 @@ typedef struct DW_LineVMState
// Line table doesn't contain full path to a file, instead
// DWARF encodes path as two indices. First index will point into a directory
// table, and second points into a file name table.
U32 file_index;
U64 file_index;
U32 line;
U32 column;
U64 line;
U64 column;
B32 is_stmt; // Indicates that "address" points to place suitable for a breakpoint.
B32 basic_block; // Indicates that the "address" is inside a basic block.
@@ -267,35 +269,33 @@ typedef struct DW_LineVMState
B32 end_sequence; // Indicates that "address" points to the first instruction in the instruction block that follows.
} DW_LineVMState;
typedef struct DW_Line
typedef struct DW_LineVM
{
U64 file_index;
U32 line;
U32 column;
U64 address;
} DW_Line;
typedef struct DW_LineNode
{
struct DW_LineNode *next;
DW_Line v;
} DW_LineNode;
typedef struct DW_LineSeqNode
{
struct DW_LineSeqNode *next;
U64 count;
DW_LineNode *first;
DW_LineNode *last;
} DW_LineSeqNode;
typedef struct DW_LineTableParseResult
{
DW_LineVMHeader vm_header;
U64 seq_count;
DW_LineSeqNode *first_seq;
DW_LineSeqNode *last_seq;
} DW_LineTableParseResult;
Arena *arena;
U64 cursor;
String8 program;
DW_LineVMHeader header;
B32 new_line;
B32 new_seq;
B32 skip_opcode;
DW_LineVMState state;
U64 advance;
U64 opcode_off;
DW_StdOpcode opcode;
DW_ExtOpcode ext_opcode;
U64 ext_length;
U64 line_advance;
U64 addr_advance;
HashTable *ext_file_ht;
struct {
union {
String8 string;
U64 u64;
S64 s64;
};
} operands[4];
String8 error;
} DW_LineVM;
////////////////////////////////
// .debug_pubnames and .debug_pubtypes
@@ -460,15 +460,16 @@ internal U64 dw_addr_from_list_unit (DW_ListUnit *lu, U64 index);
// abbrev table
internal U64 dw_read_abbrev_tag (String8 data, U64 offset, DW_Abbrev *out_abbrev);
internal U64 dw_read_abbrev_attrib(String8 data, U64 offset, DW_Abbrev *out_abbrev);
internal DW_AbbrevTable dw_make_abbrev_table(Arena *arena, String8 abbrev_data, U64 start_abbrev_off);
internal U64 dw_read_abbrev_tag (String8 data, U64 offset, DW_Abbrev *out_abbrev);
internal U64 dw_read_abbrev_attrib(String8 data, U64 offset, DW_Abbrev *out_abbrev);
internal DW_AbbrevTable dw_read_abbrev_table(Arena *arena, String8 abbrev_data, U64 abbrev_base);
internal U64 dw_abbrev_offset_from_abbrev_id(DW_AbbrevTable table, U64 abbrev_id);
// form and tag
internal U64 dw_read_form(String8 data, U64 off, DW_Version version, DW_Format unit_format, U64 address_size, DW_FormKind form_kind, U64 implicit_const, DW_Form *form_out);
internal U64 dw_read_tag (Arena *arena, String8 tag_data, U64 tag_off, U64 tag_base, DW_AbbrevTable abbrev_table, String8 abbrev_data, DW_Version version, DW_Format unit_format, U64 address_size, DW_Tag *tag_out);
internal B32 dw_read_form (String8 data, DW_Version version, DW_Format unit_format, U64 address_size, DW_FormKind form_kind, U64 implicit_const, DW_Form *form_out, U64 *bytes_read_out);
internal U64 dw_read_tag (Arena *arena, DW_Input *input, DW_AbbrevTable abbrev_table, DW_Version version, DW_Format format, U64 address_size, Rng1U64 cu_info_range, U64 tag_info_off, DW_Tag *tag_out);
internal U64 dw_read_tag_cu(Arena *arena, DW_Input *input, DW_CompUnit *cu, U64 info_off, DW_Tag *tag_out);
// attrib interp
@@ -530,18 +531,15 @@ internal DW_TagTree dw_tag_tree_from_cu(Arena *arena, DW_Input *input, DW_Comp
internal HashTable * dw_make_tag_hash_table(Arena *arena, DW_TagTree tag_tree);
internal DW_TagNode * dw_tag_node_from_info_off(DW_CompUnit *cu, U64 info_off);
// line info
// line VM
internal U64 dw_read_line_file(String8 line_data, U64 line_off, DW_Input *input, DW_Version unit_version, DW_Format unit_format, DW_Ext ext, U64 address_size, DW_ListUnit *str_offsets, U64 enc_count, U64 *enc_arr, DW_LineFile *line_file_out);
internal U64 dw_read_line_vm_header(Arena *arena, String8 line_data, U64 line_off, DW_Input *input, String8 cu_dir, String8 cu_name, U8 cu_address_size, DW_ListUnit *cu_str_offsets, DW_LineVMHeader *header_out);
internal void dw_line_vm_reset(DW_LineVMState *state, B32 default_is_stmt);
internal void dw_line_vm_advance(DW_LineVMState *state, U64 advance, U64 min_inst_len, U64 max_ops_for_inst);
internal DW_LineSeqNode * dw_push_line_seq(Arena* arena, DW_LineTableParseResult *parsed_tbl);
internal DW_LineNode * dw_push_line(Arena *arena, DW_LineTableParseResult *tbl, DW_LineVMState *vm_state, B32 start_of_sequence);
internal String8 dw_path_from_file(Arena *arena, DW_LineVMHeader *vm, DW_LineFile *file);
internal String8 dw_path_from_file_idx(Arena *arena, DW_LineVMHeader *vm, U64 file_idx);
internal DW_LineTableParseResult dw_parsed_line_table_from_data(Arena *arena, String8 unit_data, DW_Input *input, String8 cu_dir, String8 cu_name, U8 cu_address_size, DW_ListUnit *cu_str_offsets);
internal U64 dw_read_line_vm_header(Arena *arena, DW_Input *input, String8 cu_stmt_list, String8 cu_dir, String8 cu_name, U8 cu_address_size, DW_ListUnit *cu_str_offsets, DW_LineVMHeader *header_out);
internal DW_LineVM * dw_line_vm_init(DW_Input *input, DW_CompUnit *cu);
internal void dw_line_vm_release(DW_LineVM *vm);
internal void dw_line_vm_advance(DW_LineVM *vm, U64 advance);
internal B32 dw_line_vm_step(DW_LineVM *vm);
internal DW_LineFile * dw_line_vm_find_file(DW_LineVM *vm, U64 file_idx);
internal String8 dw_path_from_file(Arena *arena, String8Array dir_table, DW_LineFile *file);
// helper for .debug_pubtypes and .debug_pubnames