cmd/internal/ld, runtime: abort on shared library ABI mismatch
This:
1) Defines the ABI hash of a package (as the SHA1 of the __.PKGDEF)
2) Defines the ABI hash of a shared library (sort the packages by import
path, concatenate the hashes of the packages and SHA1 that)
3) When building a shared library, compute the above value and define a
global symbol that points to a go string that has the hash as its value.
4) When linking against a shared library, read the abi hash from the
library and put both the value seen at link time and a reference
to the global symbol into the moduledata.
5) During runtime initialization, check that the hash seen at link time
still matches the hash the global symbol points to.
Change-Id: Iaa54c783790e6dde3057a2feadc35473d49614a5
Reviewed-on: https://go-review.googlesource.com/8773
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
diff --git a/src/cmd/internal/ld/link.go b/src/cmd/internal/ld/link.go
index 03da52a..a314ca13 100644
--- a/src/cmd/internal/ld/link.go
+++ b/src/cmd/internal/ld/link.go
@@ -106,6 +106,11 @@
Gotype *LSym
}
+type Shlib struct {
+ Path string
+ Hash []byte
+}
+
type Link struct {
Thechar int32
Thestring string
@@ -122,8 +127,8 @@
Nsymbol int32
Tlsg *LSym
Libdir []string
- Library []Library
- Shlibs []string
+ Library []*Library
+ Shlibs []Shlib
Tlsoffset int
Diag func(string, ...interface{})
Cursym *LSym
@@ -149,6 +154,7 @@
File string
Pkg string
Shlib string
+ hash []byte
}
type Pcln struct {
