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wasm: fix symbol table index for archives

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The symbol table was generated incorrectly. The correct way is to use
the custom linking WebAssembly section, which I implemented in go-wasm
for this purpose.

This fixes https://github.com/tinygo-org/tinygo/issues/4114 and is a
prerequisite for https://github.com/tinygo-org/tinygo/pull/4176.
This commit is contained in:
Ayke van Laethem
2024-03-12 21:52:52 +01:00
committed by deadprogram
parent ad4d722f54
commit 78775007fa
3 changed files with 19 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
builder/ar.go
+16 -6
View File
@@ -78,17 +78,27 @@ func makeArchive(arfile *os.File, objs []string) error {
} else if dbg, err := wasm.Parse(objfile); err == nil {
for _, s := range dbg.Sections {
switch section := s.(type) {
case *wasm.SectionImport:
for _, ln := range section.Entries {
if ln.Kind != wasm.ExtKindFunction {
// Not a function
case *wasm.SectionLinking:
for _, symbol := range section.Symbols {
if symbol.Flags&wasm.LinkingSymbolFlagUndefined != 0 {
// Don't list undefined functions.
continue
}
if symbol.Flags&wasm.LinkingSymbolFlagBindingLocal != 0 {
// Don't include local symbols.
continue
}
if symbol.Kind != wasm.LinkingSymbolKindFunction && symbol.Kind != wasm.LinkingSymbolKindData {
// Link functions and data symbols.
// Some data symbols need to be included, such as
// __log_data.
continue
}
// Include in the archive.
symbolTable = append(symbolTable, struct {
name string
fileIndex int
}{ln.Field, i})
}{symbol.Name, i})
}
}
}
go.mod
+1 -1
View File
@@ -3,7 +3,7 @@ module github.com/tinygo-org/tinygo
go 1.18
require (
github.com/aykevl/go-wasm v0.0.2-0.20220616010729-4a0a888aebdc
github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c
github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2
github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee
github.com/chromedp/chromedp v0.7.6
go.sum
+2 -2
View File
@@ -1,5 +1,5 @@
github.com/aykevl/go-wasm v0.0.2-0.20220616010729-4a0a888aebdc h1:Yp49g+qqgQRPk/gcRSmAsXgnT16XPJ6Y5JM1poc6gYM=
github.com/aykevl/go-wasm v0.0.2-0.20220616010729-4a0a888aebdc/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c h1:4T0Vj1UkGgcpkRrmn7SbokebnlfxJcMZPgWtOYACAAA=
github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2 h1:oMCHnXa6CCCafdPDbMh/lWRhRByN0VFLvv+g+ayx1SI=
github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2/go.mod h1:PkYb9DJNAwrSvRx5DYA+gUcOIgTGVMNkfSCbZM8cWpI=
github.com/chromedp/cdproto v0.0.0-20211126220118-81fa0469ad77/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=