[Buildroot] [PATCH v9 2/2] testing/tests: CLANG compiler-rt runtime test
Matt Weber
matthew.weber at rockwellcollins.com
Wed Jun 3 12:09:31 UTC 2020
This patch adds a test case that
1) Builds the complete LLVM and CLANG set of host tools
2) Cross-compiles the compiler-rt runtime using CLANG
3) Builds a cross-compiled application using CLANG and the libfuzzer
compiler-rt library.
4) Executes the fuzz application (part of the libfuzzer package) on
target and checks expected output for a heap-buffer-overflow.
Depends on the following Clang cross-compiler series to be applied
first.
http://patchwork.ozlabs.org/project/buildroot/list/?series=129565
Signed-off-by: Matthew Weber <matthew.weber at rockwellcollins.com>
Cc: Ricardo Martincoski <ricardo.martincoski at gmail.com>
Cc: Romain Naour <romain.naour at smile.fr>
Reviewed-by: Ricardo Martincoski <ricardo.martincoski at gmail.com>
[with the entire series applied on next branch:
https://gitlab.com/RicardoMartincoski/buildroot/-/jobs/121908178
NOTE: this test case takes longer than test_rust, ~2 hours in my host
machine with all tarballs previously downloaded]
Tested-by: Ricardo Martincoski <ricardo.martincoski at gmail.com>
---
Changes
v1 -> v2
[Ricardo
- updated yml with test case
- moved emulator launch cmd to test case from infra
- defconfig in the order provided by savedefconfig
- indent defconfig
- add full package for test code to the test br2-external
- consolidated to one class only
v2 -> v3
- Added Review/tested by
v4
- None
v5
- Rebased post 2018.11 on master
v6
- Testing of LLVM/Clang bump
v7
- Rebase on master and testing of LLVM/Clang bump to 8.0
- Updated hashes for archive and legal info (legal info changed
because of spelling cleanup)
v8
- Cleaned up wording the 4th item of the message above.
[Romain
- Removes a hardcoded toolchain/sysroot path "b option" for libfuzzer
pkg build, however requires this series applied.
http://patchwork.ozlabs.org/project/buildroot/list/?series=129565
- updated test case to check for heap overflow string to keep arch
generic
- Removed the fixed mcpu arg from clang++ build and dropped --sysroot
as cross compiler wrapper now provides this for libfuzzer build
v9
- Rebased post 2020.05
---
.gitlab-ci.yml | 1 +
.../br2-external/clang-compiler-rt/Config.in | 1 +
.../clang-compiler-rt/external.desc | 1 +
.../clang-compiler-rt/external.mk | 1 +
.../package/libfuzzer/Config.in | 7 +++
.../package/libfuzzer/libfuzzer.hash | 2 +
.../package/libfuzzer/libfuzzer.mk | 24 ++++++++++
support/testing/tests/package/test_clang.py | 46 +++++++++++++++++++
8 files changed, 83 insertions(+)
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/Config.in
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/external.desc
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/external.mk
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/Config.in
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.hash
create mode 100644 support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.mk
create mode 100644 support/testing/tests/package/test_clang.py
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0bf8a73b36..96a8638717 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -399,6 +399,7 @@ tests.init.test_systemd.TestInitSystemSystemdRwFull: { extends: .runtime_test }
tests.init.test_systemd.TestInitSystemSystemdRwIfupdown: { extends: .runtime_test }
tests.init.test_systemd.TestInitSystemSystemdRwNetworkd: { extends: .runtime_test }
tests.package.test_atop.TestAtop: { extends: .runtime_test }
+tests.package.test_clang.TestClangCompilerRT: { extends: .runtime_test }
tests.package.test_crudini.TestCrudiniPy2: { extends: .runtime_test }
tests.package.test_crudini.TestCrudiniPy3: { extends: .runtime_test }
tests.package.test_docker_compose.TestDockerCompose: { extends: .runtime_test }
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/Config.in b/support/testing/tests/package/br2-external/clang-compiler-rt/Config.in
new file mode 100644
index 0000000000..e1f9f8c598
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/Config.in
@@ -0,0 +1 @@
+source "$BR2_EXTERNAL_CLANG_COMPILER_RT_PATH/package/libfuzzer/Config.in"
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/external.desc b/support/testing/tests/package/br2-external/clang-compiler-rt/external.desc
new file mode 100644
index 0000000000..92df85911d
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/external.desc
@@ -0,0 +1 @@
+name: CLANG_COMPILER_RT
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/external.mk b/support/testing/tests/package/br2-external/clang-compiler-rt/external.mk
new file mode 100644
index 0000000000..6fa55c1211
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/external.mk
@@ -0,0 +1 @@
+include $(sort $(wildcard $(BR2_EXTERNAL_CLANG_COMPILER_RT_PATH)/package/*/*.mk))
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/Config.in b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/Config.in
new file mode 100644
index 0000000000..5af5d1b6b9
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/Config.in
@@ -0,0 +1,7 @@
+config BR2_PACKAGE_LIBFUZZER
+ bool "libfuzzer"
+ help
+ This is a set of tests (benchmarks) for fuzzing
+ engines (fuzzers).
+
+ https://github.com/google/fuzzer-test-suite
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.hash b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.hash
new file mode 100644
index 0000000000..6baf5763cf
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.hash
@@ -0,0 +1,2 @@
+sha256 c0addb4d7f0447fc9fd7c80e5721fafe4c137f29a8ebd94c5fef7e1d6a2c944c libfuzzer-64e4d9aa19a8d33b61882154addbf8419d7416e1.tar.gz
+sha256 cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30 LICENSE
diff --git a/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.mk b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.mk
new file mode 100644
index 0000000000..1b6f9b8fee
--- /dev/null
+++ b/support/testing/tests/package/br2-external/clang-compiler-rt/package/libfuzzer/libfuzzer.mk
@@ -0,0 +1,24 @@
+################################################################################
+#
+# libfuzzer
+#
+################################################################################
+
+LIBFUZZER_VERSION = 64e4d9aa19a8d33b61882154addbf8419d7416e1
+LIBFUZZER_SITE = $(call github,google,fuzzer-test-suite,$(LIBFUZZER_VERSION))
+LIBFUZZER_LICENSE = Apache-2.0
+LIBFUZZER_LICENSE_FILES = LICENSE
+LIBFUZZER_DEPENDENCIES = compiler-rt
+
+define LIBFUZZER_BUILD_CMDS
+ $(HOST_DIR)/bin/clang++ \
+ -fsanitize=address,fuzzer \
+ $(@D)/tutorial/fuzz_me.cc \
+ -o $(@D)/fuzz_me
+endef
+
+define LIBFUZZER_INSTALL_TARGET_CMDS
+ $(INSTALL) -D -m 755 $(@D)/fuzz_me $(TARGET_DIR)/usr/bin/fuzz_me
+endef
+
+$(eval $(generic-package))
diff --git a/support/testing/tests/package/test_clang.py b/support/testing/tests/package/test_clang.py
new file mode 100644
index 0000000000..df3990c6be
--- /dev/null
+++ b/support/testing/tests/package/test_clang.py
@@ -0,0 +1,46 @@
+import os
+
+import infra.basetest
+
+FUZZ_TIMEOUT = 120
+
+
+class TestClangCompilerRT(infra.basetest.BRTest):
+ br2_external = [infra.filepath("tests/package/br2-external/clang-compiler-rt")]
+ config = \
+ """
+ BR2_aarch64=y
+ BR2_TOOLCHAIN_EXTERNAL=y
+ BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+ BR2_LINUX_KERNEL=y
+ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.7"
+ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+ BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+ BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+ BR2_PACKAGE_COMPILER_RT=y
+ BR2_PACKAGE_LLVM=y
+ BR2_TARGET_ROOTFS_CPIO=y
+ BR2_TARGET_ROOTFS_CPIO_GZIP=y
+ # BR2_TARGET_ROOTFS_TAR is not set
+ BR2_PACKAGE_LIBFUZZER=y
+ """
+
+ def login(self):
+ img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")
+ kern = os.path.join(self.builddir, "images", "Image")
+ # Sanitizers overallocate memory and the minimum that seemed to work was 512MB
+ self.emulator.boot(arch="aarch64",
+ kernel=kern,
+ kernel_cmdline=["console=ttyAMA0"],
+ options=["-M", "virt", "-cpu", "cortex-a53", "-m", "512", "-initrd", img])
+ self.emulator.login()
+
+ def test_run(self):
+ self.login()
+
+ # The test case verifies the application executes and that
+ # the symbolizer is working to decode the stack trace.
+ cmd = "fuzz_me 2>&1 | grep heap-buffer-overflow"
+ _, exit_code = self.emulator.run(cmd, FUZZ_TIMEOUT)
+ self.assertEqual(exit_code, 0)
--
2.17.1
More information about the buildroot
mailing list