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author | Michael Hudson-Doyle <michael.hudson@canonical.com> | 2016-05-31 19:24:30 +1200 |
---|---|---|
committer | Michael Hudson-Doyle <michael.hudson@canonical.com> | 2016-05-31 20:57:57 +0000 |
commit | 2c1791b13b27dfc69adf2d19ecf9a180d089cd22 (patch) | |
tree | d49cbac5ae99adb7471837af0dc9ea3cf68da430 | |
parent | 2a6544b604b61898d666ffbe456ccde720c04577 (diff) | |
download | go-2c1791b13b27dfc69adf2d19ecf9a180d089cd22.tar.gz go-2c1791b13b27dfc69adf2d19ecf9a180d089cd22.zip |
cmd/link: suppress PIE whenever externally linking with a sanitizer
golang.org/issue/15443 complained that a race-enabled PIE binary crashed at
startup, but other ways of linking in tsan (or other sanitizers) such as
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread
have the same problem. Pass -no-pie to the host linker (if supported) if any
-fsanitizer=foo cgo LDFLAG is seen when linking.
Fixes #15887
Change-Id: Id799770f8d045f6f40fa8c463563937a5748d1a8
Reviewed-on: https://go-review.googlesource.com/23535
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
-rw-r--r-- | src/cmd/link/internal/ld/lib.go | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go index ded5ac6de0..14f4fa9aad 100644 --- a/src/cmd/link/internal/ld/lib.go +++ b/src/cmd/link/internal/ld/lib.go @@ -1222,13 +1222,21 @@ func hostlink() { } } + sanitizers := flag_race != 0 + + for _, flag := range ldflag { + if strings.HasPrefix(flag, "-fsanitize=") { + sanitizers = true + } + } + argv = append(argv, ldflag...) - if flag_race != 0 { + if sanitizers { // On a system where the toolchain creates position independent - // executables by default, tsan initialization can fail. So we pass - // -no-pie here, but support for that flag is quite new and we test - // for its support first. + // executables by default, tsan/msan/asan/etc initialization can + // fail. So we pass -no-pie here, but support for that flag is quite + // new and we test for its support first. src := filepath.Join(tmpdir, "trivial.c") if err := ioutil.WriteFile(src, []byte{}, 0666); err != nil { Ctxt.Diag("WriteFile trivial.c failed: %v", err) |