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| 1 | +use std::fs::File; |
| 2 | +use std::os::unix::ffi::OsStringExt; |
| 3 | +use std::path::Path; |
| 4 | + |
| 5 | +use gimli::write::{ |
| 6 | + self, DebugLine, DebugLineStrOffsets, DebugStrOffsets, DwarfUnit, EndianVec, LineProgram, |
| 7 | + LineString, |
| 8 | +}; |
| 9 | +use gimli::{BigEndian, Encoding, LineEncoding}; |
| 10 | +use sway_error::error::CompileError; |
| 11 | +use sway_types::Span; |
| 12 | + |
| 13 | +use crate::source_map::SourceMap; |
| 14 | + |
| 15 | +use object::write::Object; |
| 16 | + |
| 17 | +pub fn write_dwarf( |
| 18 | + source_map: &SourceMap, |
| 19 | + primary_dir: &Path, |
| 20 | + primary_src: &Path, |
| 21 | + out_file: &Path, |
| 22 | +) -> Result<(), CompileError> { |
| 23 | + let encoding = gimli::Encoding { |
| 24 | + format: gimli::Format::Dwarf64, |
| 25 | + version: 5, |
| 26 | + address_size: 8, |
| 27 | + }; |
| 28 | + |
| 29 | + let program = build_line_number_program(encoding, primary_dir, primary_src, source_map)?; |
| 30 | + |
| 31 | + program |
| 32 | + .write( |
| 33 | + &mut DebugLine::from(EndianVec::new(BigEndian)), |
| 34 | + encoding, |
| 35 | + &DebugLineStrOffsets::none(), |
| 36 | + &DebugStrOffsets::none(), |
| 37 | + ) |
| 38 | + .map_err(|err| { |
| 39 | + sway_error::error::CompileError::InternalOwned(err.to_string(), Span::dummy()) |
| 40 | + })?; |
| 41 | + |
| 42 | + let mut dwarf = DwarfUnit::new(encoding); |
| 43 | + dwarf.unit.line_program = program; |
| 44 | + // Write to new sections |
| 45 | + let mut debug_sections = write::Sections::new(EndianVec::new(BigEndian)); |
| 46 | + dwarf.write(&mut debug_sections).map_err(|err| { |
| 47 | + sway_error::error::CompileError::InternalOwned(err.to_string(), Span::dummy()) |
| 48 | + })?; |
| 49 | + |
| 50 | + let file = File::create(out_file).unwrap(); |
| 51 | + let mut obj = Object::new( |
| 52 | + object::BinaryFormat::Elf, |
| 53 | + object::Architecture::X86_64, |
| 54 | + object::Endianness::Big, |
| 55 | + ); |
| 56 | + debug_sections |
| 57 | + .for_each(|section_id, data| { |
| 58 | + let sec = obj.add_section( |
| 59 | + [].into(), |
| 60 | + section_id.name().into(), |
| 61 | + object::SectionKind::Other, |
| 62 | + ); |
| 63 | + obj.set_section_data(sec, data.clone().into_vec(), 8); |
| 64 | + Ok::<(), ()>(()) |
| 65 | + }) |
| 66 | + .unwrap(); |
| 67 | + |
| 68 | + obj.write_stream(file).map_err(|err| { |
| 69 | + sway_error::error::CompileError::InternalOwned(err.to_string(), Span::dummy()) |
| 70 | + })?; |
| 71 | + |
| 72 | + Ok(()) |
| 73 | +} |
| 74 | + |
| 75 | +fn build_line_number_program( |
| 76 | + encoding: Encoding, |
| 77 | + primary_dir: &Path, |
| 78 | + primary_src: &Path, |
| 79 | + source_map: &SourceMap, |
| 80 | +) -> Result<LineProgram, CompileError> { |
| 81 | + let primary_src = primary_src.strip_prefix(primary_dir).map_err(|err| { |
| 82 | + sway_error::error::CompileError::InternalOwned(err.to_string(), Span::dummy()) |
| 83 | + })?; |
| 84 | + let mut program = LineProgram::new( |
| 85 | + encoding, |
| 86 | + LineEncoding::default(), |
| 87 | + LineString::String(primary_dir.to_path_buf().into_os_string().into_vec()), |
| 88 | + LineString::String(primary_src.to_path_buf().into_os_string().into_vec()), |
| 89 | + None, |
| 90 | + ); |
| 91 | + |
| 92 | + program.begin_sequence(Some(write::Address::Constant(0))); |
| 93 | + |
| 94 | + for (ix, span) in &source_map.map { |
| 95 | + let (path, span) = span.to_span(&source_map.paths, &source_map.dependency_paths); |
| 96 | + |
| 97 | + let dir = path |
| 98 | + .parent() |
| 99 | + .ok_or(sway_error::error::CompileError::InternalOwned( |
| 100 | + "Path doesn't have a proper prefix".to_string(), |
| 101 | + Span::dummy(), |
| 102 | + ))?; |
| 103 | + let file = path |
| 104 | + .file_name() |
| 105 | + .ok_or(sway_error::error::CompileError::InternalOwned( |
| 106 | + "Path doesn't have proper filename".to_string(), |
| 107 | + Span::dummy(), |
| 108 | + ))?; |
| 109 | + |
| 110 | + let dir_id = program.add_directory(LineString::String( |
| 111 | + dir.as_os_str().as_encoded_bytes().into(), |
| 112 | + )); |
| 113 | + let file_id = program.add_file( |
| 114 | + LineString::String(file.as_encoded_bytes().into()), |
| 115 | + dir_id, |
| 116 | + None, |
| 117 | + ); |
| 118 | + |
| 119 | + program.generate_row(); |
| 120 | + |
| 121 | + let current_row = program.row(); |
| 122 | + current_row.line = span.start.line as u64; |
| 123 | + current_row.column = span.start.col as u64; |
| 124 | + current_row.address_offset = *ix as u64; |
| 125 | + current_row.file = file_id; |
| 126 | + } |
| 127 | + |
| 128 | + program.end_sequence( |
| 129 | + source_map |
| 130 | + .map |
| 131 | + .last_key_value() |
| 132 | + .map(|(key, _)| *key) |
| 133 | + .unwrap_or_default() as u64 |
| 134 | + + 1, |
| 135 | + ); |
| 136 | + |
| 137 | + Ok(program) |
| 138 | +} |
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