82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
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// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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package asm
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import (
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"testing"
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"sourcedock.dev/petrbalvin/gasm-devkit/parser"
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)
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func TestEmitDWARF(t *testing.T) {
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src := `#include "textflag.h"
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TEXT ·add(SB), NOSPLIT, $0-24
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MOVQ a+0(FP), AX
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MOVQ b+8(FP), BX
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ADDQ BX, AX
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MOVQ AX, ret+16(FP)
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RET
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`
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f, errs := parser.Parse("test_amd64.s", src)
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if len(errs) > 0 {
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t.Fatalf("parse: %v", errs)
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}
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img, err := AssembleFile(f)
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if err != nil {
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t.Fatalf("assemble: %v", err)
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}
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ds := emitDWARF(img, "test_amd64.s")
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// .debug_abbrev must not be empty and must start with abbrev code 1.
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if len(ds.debugAbbrev) == 0 {
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t.Fatal("empty .debug_abbrev")
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}
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if ds.debugAbbrev[0] != 1 {
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t.Fatalf(".debug_abbrev first byte = %d, want 1", ds.debugAbbrev[0])
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}
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// .debug_info must have a compile unit header (DWARF5 version 5).
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if len(ds.debugInfo) < 12 {
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t.Fatalf(".debug_info too short: %d bytes", len(ds.debugInfo))
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}
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// Version field at offset 4 (after unit_length).
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if ds.debugInfo[4] != 5 || ds.debugInfo[5] != 0 {
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t.Fatalf(".debug_info version = %d, want 5", uint16(ds.debugInfo[4])|uint16(ds.debugInfo[5])<<8)
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}
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// .debug_line must have a header.
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if len(ds.debugLine) < 20 {
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t.Fatalf(".debug_line too short: %d bytes", len(ds.debugLine))
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}
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// Version at offset 4.
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if ds.debugLine[4] != 5 || ds.debugLine[5] != 0 {
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t.Fatalf(".debug_line version = %d, want 5", uint16(ds.debugLine[4])|uint16(ds.debugLine[5])<<8)
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}
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// .debug_line_str must contain the source file name.
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if len(ds.debugLineStr) == 0 {
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t.Fatal("empty .debug_line_str")
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}
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// Relocations must reference the function.
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if len(ds.lineRelocs) == 0 {
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t.Fatal("no .debug_line relocations")
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}
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if len(ds.infoRelocs) == 0 {
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t.Fatal("no .debug_info relocations")
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}
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}
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func TestDwarfAbbrevTable(t *testing.T) {
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abbrev := dwarfAbbrevTable()
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if len(abbrev) == 0 {
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t.Fatal("empty abbrev table")
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}
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// Must end with a zero byte (end of table).
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if abbrev[len(abbrev)-1] != 0 {
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t.Fatalf("abbrev table last byte = %d, want 0", abbrev[len(abbrev)-1])
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}
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}
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