mirror of
https://github.com/burrowers/garble
synced 2026-06-06 15:24:28 +00:00
Daniel Martí
30357af923
This lets us start taking advantage of featurs from Go 1.23, particularly tracking aliases in go/types and iterators. Note that we need to add code to properly handle or skip over the new *types.Alias type which go/types produces for Go type aliases. Also note that we actually turn this mode off entirely for now, due to the bug reported at https://go.dev/issue/70394. We don't yet remove our own alias tracking code yet due to the above. We hope to be able to remove it very soon.
137 lines
3.4 KiB
Plaintext
137 lines
3.4 KiB
Plaintext
# Unknown build flags should result in errors.
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! exec garble reverse -badflag=foo .
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stderr 'flag provided but not defined'
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exec garble build
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exec ./main
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cp stderr main.stderr
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# Ensure that the garbled panic output looks correct.
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# This output is not reproducible between 'go test' runs,
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# so we can't use a static golden file.
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grep 'goroutine 1 \[running\]' main.stderr
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# Note that ExportedLibMethod isn't obfuscated.
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# Note that we use long names like "long_lib.go",
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# because an obfuscated filename could realistically end with "lib".
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! grep 'ExportedLib(Type|Field)|unexportedMainFunc|test/main|long_main\.go|long_lib\.go' main.stderr
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stdin main.stderr
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exec garble reverse .
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cmp stdout reverse.stdout
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# Ensure that we cleaned up the temporary files.
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# Note that we rely on the unix-like TMPDIR env var name.
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[!windows] ! grepfiles ${TMPDIR} 'garble|importcfg|cache\.gob|\.go'
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[short] stop # no need to verify this with -short
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# Ensure that the reversed output matches the non-garbled output.
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go build -trimpath
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exec ./main
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cmp stderr reverse.stdout
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# Ensure that we can still reverse with -literals.
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exec garble -literals build
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exec ./main
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cp stderr main-literals.stderr
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stdin main-literals.stderr
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exec garble -literals reverse .
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cmp stdout reverse.stdout
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# Reversing a -literals output without the flag should fail.
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stdin main-literals.stderr
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! exec garble reverse .
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cmp stdout main-literals.stderr
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-- go.mod --
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module test/main
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go 1.23
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-- long_main.go --
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package main
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import (
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"os"
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"runtime"
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"test/main/lib"
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)
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func main() {
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unexportedMainFunc()
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_, filename, _, _ := runtime.Caller(0)
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println()
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println("main filename:", filename)
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}
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func unexportedMainFunc() {
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anonFunc := func() {
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lt := lib.ExportedLibType{}
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if err := lt.ExportedLibMethod(os.Stderr); err != nil {
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panic(err)
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}
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}
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anonFunc()
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}
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-- lib/long_lib.go --
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package lib
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import (
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"bytes"
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"io"
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"regexp"
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"runtime"
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"runtime/debug"
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)
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type ExportedLibType struct{
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ExportedLibField int
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}
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func (*ExportedLibType) ExportedLibMethod(w io.Writer) error {
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_, filename, _, _ := runtime.Caller(0)
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println("lib filename:", filename)
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println()
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return printStackTrace(w)
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}
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func printStackTrace(w io.Writer) error {
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// Panic outputs include "0xNN" pointers and offsets which change
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// between platforms.
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// The format also changes depending on the ABI.
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// Strip them out here, to have portable static stdout files.
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rxCallArgs := regexp.MustCompile(`\(({|0x)[^)]+\)|\(\)`)
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rxPointer := regexp.MustCompile(`\+0x[[:xdigit:]]+`)
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// Keep this comment here, because comments affect line numbers.
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stack := debug.Stack()
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stack = rxCallArgs.ReplaceAll(stack, []byte("(...)"))
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stack = rxPointer.ReplaceAll(stack, []byte("+0x??"))
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// Drop the second and third lines, as they show a position in runtime/debug
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// which can change between Go versions.
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stackLines := bytes.Split(stack, []byte("\n"))
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stackLines = append(stackLines[:1], stackLines[3:]...)
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_, err := w.Write(bytes.Join(stackLines, []byte("\n")))
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return err
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}
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-- reverse.stdout --
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lib filename: test/main/lib/long_lib.go
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goroutine 1 [running]:
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test/main/lib.printStackTrace(...)
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test/main/lib/long_lib.go:33 +0x??
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test/main/lib.(*ExportedLibType).ExportedLibMethod(...)
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test/main/lib/long_lib.go:20 +0x??
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main.unexportedMainFunc.func1(...)
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test/main/long_main.go:21
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main.unexportedMainFunc(...)
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test/main/long_main.go:25 +0x??
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main.main(...)
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test/main/long_main.go:11 +0x??
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main filename: test/main/long_main.go
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