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std.debug.dwarf supports line number version 4

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fixes stack traces for llvm6 generated zig programs
This commit is contained in:
Andrew Kelley 2018-03-02 16:26:22 -05:00
parent a217c764db
commit 56645c1701
1 changed files with 9 additions and 2 deletions
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11
std/debug/index.zig
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@ -791,14 +791,21 @@ fn getLineNumberInfo(st: &ElfStackTrace, compile_unit: &const CompileUnit, targe
}
const version = try in_stream.readInt(st.elf.endian, u16);
if (version != 2) return error.InvalidDebugInfo;
// TODO support 3 and 5
if (version != 2 and version != 4) return error.InvalidDebugInfo;
const prologue_length = try in_stream.readInt(st.elf.endian, u32);
const prologue_length = if (is_64) try in_stream.readInt(st.elf.endian, u64)
else try in_stream.readInt(st.elf.endian, u32);
const prog_start_offset = (try in_file.getPos()) + prologue_length;
const minimum_instruction_length = try in_stream.readByte();
if (minimum_instruction_length == 0) return error.InvalidDebugInfo;
if (version >= 4) {
// maximum_operations_per_instruction
_ = try in_stream.readByte();
}
const default_is_stmt = (try in_stream.readByte()) != 0;
const line_base = try in_stream.readByteSigned();