Switch platform EH unwinder to prebuilt LLVM libunwind
For the platform libc++ STL, remove the
-Wl,--exclude-libs,libunwind_llvm.a argument, which is redundant with
the same argument in deviceGlobalLdflags.
Bug: http://b/153025717
Test: device boots
Change-Id: Idd7791d52f74aab2d5f59419fb75f841fc29a2eb
diff --git a/cc/config/global.go b/cc/config/global.go
index fa8e0fb..89ae69a 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -90,9 +90,12 @@
"-Wl,--warn-shared-textrel",
"-Wl,--fatal-warnings",
"-Wl,--no-undefined-version",
+ // TODO: Eventually we should link against a libunwind.a with hidden symbols, and then these
+ // --exclude-libs arguments can be removed.
"-Wl,--exclude-libs,libgcc.a",
"-Wl,--exclude-libs,libgcc_stripped.a",
"-Wl,--exclude-libs,libunwind_llvm.a",
+ "-Wl,--exclude-libs,libunwind.a",
}
deviceGlobalLldflags = append(ClangFilterUnknownLldflags(deviceGlobalLdflags),
diff --git a/cc/stl.go b/cc/stl.go
index 406fa3a..75fab17 100644
--- a/cc/stl.go
+++ b/cc/stl.go
@@ -140,11 +140,7 @@
}
func staticUnwinder(ctx android.BaseModuleContext) string {
- if ctx.Arch().ArchType == android.Arm {
- return "libunwind_llvm"
- } else {
- return "libgcc_stripped"
- }
+ return "libunwind"
}
func (stl *stl) deps(ctx BaseModuleContext, deps Deps) Deps {
@@ -192,6 +188,7 @@
if needsLibAndroidSupport(ctx) {
deps.StaticLibs = append(deps.StaticLibs, "ndk_libandroid_support")
}
+ // TODO: Switch the NDK over to the LLVM unwinder for non-arm32 architectures.
if ctx.Arch().ArchType == android.Arm {
deps.StaticLibs = append(deps.StaticLibs, "ndk_libunwind")
} else {
@@ -231,10 +228,6 @@
// Use Win32 threads in libc++.
"-D_LIBCPP_HAS_THREAD_API_WIN32")
}
- } else {
- if ctx.Arch().ArchType == android.Arm {
- flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,--exclude-libs,libunwind_llvm.a")
- }
}
case "libstdc++":
// Nothing
diff --git a/cc/testing.go b/cc/testing.go
index 903f76c..dc9a59d 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -110,6 +110,16 @@
}
toolchain_library {
+ name: "libunwind",
+ defaults: ["linux_bionic_supported"],
+ vendor_available: true,
+ product_available: true,
+ recovery_available: true,
+ native_bridge_supported: true,
+ src: "",
+ }
+
+ toolchain_library {
name: "libclang_rt.fuzzer-arm-android",
vendor_available: true,
product_available: true,