There are two places where this information can come from: the pclntab,
and DWARF debug information.
The pclntab has a mapping from program counter locations to filenames
and line numbers, which makes stack traces more useful.
Files which don't contain any code, only things like type definitions,
global variables and constants, will not be listed. Since they do not
have any mappings in the pclntab. So these files will not be listed here.
The DWARF debug info should also list source files for the binary, among
other things. This is a bit more likely to be stripped out to save
space, but if present, it's more useful as C-based source files coming
from cgo will also be listed. The pclntab should almost always be
present and readable, though might be unreachable by `go tool objdump`
for dumping if the binary is stripped.
If the binary hasn't been stripped, then extracting this info via DWARF
is fairly simple with elfutils[1].
eu-srcfiles -e /path/to/binary
Alternatively, for an unstripped binary via pclntab with the below
one-liner:
go tool objdump /path/to/binary | grep '^TEXT ' | grep -o '(SB) .*' |
sed 's/^.....//g' | sort -u
For a stripped binary with an untampered pclntab, something could be
kludged together with the output of redress[2] (have to parse the output
a bit to get the bare paths). Left as an exercise to the reader.
e.g
redress src -suv /path/to/binary
Or just writing something yourself with gore[3] directly.
If the binary's pclntab has been tampered with, e.g by compiling the
source code with garble[4], then all bets are off, of course.
[1] https://sourceware.org/elfutils/
[2] https://github.com/goretk/redress
[3] https://github.com/goretk/gore
[4] https://github.com/burrowers/garble
Tharaneedharan Vilwanathan:
Hi All,
I have a quick question.
Is there a way to get the list of source code files of a Go binary?
Here is one solution I got:
$ strings /home/dharani/go1.22.6.linux-amd64/go/bin/gofmt | grep
"\.go$"| sort -ur
unicode/utf8/utf8.go
unicode/tables.go
unicode/letter.go
unicode/graphic.go
unicode/digit.go
time/zoneinfo_unix.go
...
But I am wondering if there is a better way. Please let me know.
Regards
dharani
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