mirror of
https://github.com/Z3Prover/z3
synced 2026-03-09 23:00:30 +00:00
test: add unit tests and CI validation for JNI architecture fix
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
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2 changed files with 350 additions and 0 deletions
72
.github/workflows/ci.yml
vendored
72
.github/workflows/ci.yml
vendored
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@ -415,6 +415,78 @@ jobs:
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- name: Run regressions
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run: python z3test/scripts/test_benchmarks.py build/z3 z3test/regressions/smt2
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- name: Validate JNI library architecture matches host
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run: |
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echo "Checking libz3java.dylib architecture..."
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ARCH=$(lipo -archs build/libz3java.dylib)
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HOST_ARCH=$(uname -m)
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echo "libz3java.dylib arch: $ARCH | host arch: $HOST_ARCH"
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if [ "$ARCH" != "$HOST_ARCH" ]; then
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echo "ERROR: libz3java.dylib has arch '$ARCH' but host is '$HOST_ARCH'"
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exit 1
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fi
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echo "OK: libz3java.dylib correctly built for $HOST_ARCH"
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# ============================================================================
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# macOS JNI cross-compilation validation (ARM64 host -> x86_64 target)
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# ============================================================================
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macos-jni-cross-compile:
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name: "MacOS JNI cross-compile (ARM64 -> x64) architecture validation"
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runs-on: macos-15
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timeout-minutes: 90
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steps:
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- name: Checkout code
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uses: actions/checkout@v6.0.2
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- name: Setup Python
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uses: actions/setup-python@v6
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with:
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python-version: '3.x'
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- name: Configure (cross-compile ARM64 host -> x86_64 target)
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run: |
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CXXFLAGS="-arch x86_64" CFLAGS="-arch x86_64" LDFLAGS="-arch x86_64" \
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python scripts/mk_make.py --java --arm64=false
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- name: Build
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run: |
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set -e
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cd build
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make -j3 libz3java.dylib
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cd ..
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- name: Validate libz3java.dylib is x86_64
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run: |
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echo "Checking libz3java.dylib architecture..."
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ARCH=$(lipo -archs build/libz3java.dylib)
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echo "libz3java.dylib architecture: $ARCH"
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if [ "$ARCH" != "x86_64" ]; then
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echo "ERROR: Expected x86_64 (cross-compiled target), got: $ARCH"
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echo "This is the regression fixed in: JNI bindings use wrong architecture in macOS cross-compilation"
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exit 1
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fi
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echo "OK: libz3java.dylib correctly built for x86_64 target on ARM64 host"
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# ============================================================================
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# Python script unit tests (build-script logic validation)
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# ============================================================================
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python-script-tests:
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name: "Python build-script unit tests"
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runs-on: ubuntu-latest
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timeout-minutes: 10
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steps:
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- name: Checkout code
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uses: actions/checkout@v6.0.2
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- name: Setup Python
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uses: actions/setup-python@v6
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with:
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python-version: '3.x'
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- name: Run Python script unit tests
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working-directory: ${{ github.workspace }}
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run: python -m unittest discover -s scripts/tests -p "test_*.py" -v
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# ============================================================================
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# macOS CMake Builds
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# ============================================================================
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278
scripts/tests/test_jni_arch_flags.py
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278
scripts/tests/test_jni_arch_flags.py
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@ -0,0 +1,278 @@
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############################################
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# Copyright (c) 2024 Microsoft Corporation
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#
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# Unit tests for JNI architecture flags in Makefile generation.
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#
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# Regression tests for:
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# "JNI bindings use wrong architecture in macOS cross-compilation (arm64 to x64)"
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#
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# The fix ensures that libz3java.dylib (and the JNI link step) uses
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# $(SLINK_EXTRA_FLAGS) instead of a hardcoded -arch arm64.
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# $(SLINK_EXTRA_FLAGS) is populated correctly in mk_config() for:
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# - Native ARM64 builds: SLINK_EXTRA_FLAGS contains -arch arm64
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# - Cross-compile to x86_64: SLINK_EXTRA_FLAGS contains -arch x86_64
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# - Other platforms: SLINK_EXTRA_FLAGS has no -arch flag
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############################################
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import io
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import os
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import sys
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import unittest
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from unittest.mock import patch, MagicMock
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# Add the scripts directory to the path so we can import mk_util
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_SCRIPTS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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if _SCRIPTS_DIR not in sys.path:
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sys.path.insert(0, _SCRIPTS_DIR)
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import mk_util
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class TestJNIArchitectureFlagsInMakefile(unittest.TestCase):
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"""
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Tests that JavaDLLComponent.mk_makefile() generates a JNI link command
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that uses $(SLINK_EXTRA_FLAGS) rather than hardcoding -arch arm64.
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$(SLINK_EXTRA_FLAGS) is set by mk_config() to contain the correct -arch
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flag for the TARGET architecture (not the host), so using it ensures
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cross-compilation works correctly.
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"""
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def setUp(self):
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"""Save mk_util global state before each test."""
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self._saved_components = list(mk_util._Components)
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self._saved_names = set(mk_util._ComponentNames)
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self._saved_name2component = dict(mk_util._Name2Component)
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self._saved_id = mk_util._Id
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self._saved_javac = mk_util.JAVAC
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self._saved_jar = mk_util.JAR
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def tearDown(self):
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"""Restore mk_util global state after each test."""
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mk_util._Components[:] = self._saved_components
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mk_util._ComponentNames.clear()
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mk_util._ComponentNames.update(self._saved_names)
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mk_util._Name2Component.clear()
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mk_util._Name2Component.update(self._saved_name2component)
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mk_util._Id = self._saved_id
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mk_util.JAVAC = self._saved_javac
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mk_util.JAR = self._saved_jar
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def _make_java_dll_component(self):
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"""
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Create a JavaDLLComponent instance bypassing the registry check so
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that tests remain independent of each other.
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"""
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# Register a stub 'api' component that provides to_src_dir
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api_stub = MagicMock()
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api_stub.to_src_dir = '../src/api'
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mk_util._Name2Component['api'] = api_stub
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mk_util._ComponentNames.add('api')
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# Build the component without going through the full Component.__init__
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# registration path (which enforces uniqueness globally).
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comp = mk_util.JavaDLLComponent.__new__(mk_util.JavaDLLComponent)
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comp.name = 'java'
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comp.dll_name = 'libz3java'
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comp.package_name = 'com.microsoft.z3'
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comp.manifest_file = None
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comp.to_src_dir = '../src/api/java'
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comp.src_dir = 'src/api/java'
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comp.deps = []
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comp.install = True
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return comp
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def _generate_makefile(self, comp, *, is_windows, is_osx, is_arch_arm64):
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"""
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Call mk_makefile() with the given platform flags and return the
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generated Makefile text.
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"""
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buf = io.StringIO()
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with patch.object(mk_util, 'JAVA_ENABLED', True), \
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patch.object(mk_util, 'IS_WINDOWS', is_windows), \
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patch.object(mk_util, 'IS_OSX', is_osx), \
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patch.object(mk_util, 'IS_ARCH_ARM64', is_arch_arm64), \
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patch.object(mk_util, 'JNI_HOME', '/path/to/jni'), \
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patch.object(mk_util, 'JAVAC', 'javac'), \
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patch.object(mk_util, 'JAR', 'jar'), \
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patch.object(mk_util, 'BUILD_DIR', '/tmp/test_build'), \
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patch('mk_util.mk_dir'), \
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patch('mk_util.get_java_files', return_value=[]):
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comp.mk_makefile(buf)
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return buf.getvalue()
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def _find_jni_link_lines(self, makefile_text):
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"""Return lines that contain the JNI library link command."""
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return [
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line for line in makefile_text.splitlines()
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if 'libz3java$(SO_EXT)' in line and 'SLINK' in line
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]
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# ------------------------------------------------------------------
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# Tests for non-Windows platforms (where SLINK_EXTRA_FLAGS matters)
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# ------------------------------------------------------------------
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def test_macos_arm64_native_uses_slink_extra_flags(self):
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"""
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On native ARM64 macOS builds, the JNI link command must use
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$(SLINK_EXTRA_FLAGS) so that the -arch arm64 flag added to
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SLINK_EXTRA_FLAGS by mk_config() is respected.
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"""
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comp = self._make_java_dll_component()
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text = self._generate_makefile(
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comp, is_windows=False, is_osx=True, is_arch_arm64=True
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)
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link_lines = self._find_jni_link_lines(text)
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self.assertTrue(
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link_lines,
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"Expected at least one JNI link line in the generated Makefile",
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)
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for line in link_lines:
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self.assertIn(
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'$(SLINK_EXTRA_FLAGS)', line,
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"JNI link command must use $(SLINK_EXTRA_FLAGS) so the "
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"correct target architecture flag is applied",
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)
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def test_macos_arm64_native_no_hardcoded_arch_arm64(self):
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"""
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The JNI link command must NOT hardcode -arch arm64.
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Hardcoding -arch arm64 breaks cross-compilation from an ARM64 host
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to an x86_64 target, which is the bug this fix addresses.
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"""
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comp = self._make_java_dll_component()
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text = self._generate_makefile(
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comp, is_windows=False, is_osx=True, is_arch_arm64=True
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)
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link_lines = self._find_jni_link_lines(text)
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self.assertTrue(link_lines, "Expected at least one JNI link line")
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for line in link_lines:
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self.assertNotIn(
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'-arch arm64', line,
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"JNI link command must not hardcode '-arch arm64'. "
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"Use $(SLINK_EXTRA_FLAGS) instead so that cross-compilation "
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"from ARM64 host to x86_64 target works correctly.",
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)
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def test_macos_x86_64_uses_slink_extra_flags(self):
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"""
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When building for x86_64 on macOS (e.g. cross-compiling from ARM64
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host), the JNI link command must still use $(SLINK_EXTRA_FLAGS) so
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that the -arch x86_64 flag set by mk_config() is applied.
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"""
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comp = self._make_java_dll_component()
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text = self._generate_makefile(
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comp, is_windows=False, is_osx=True, is_arch_arm64=False
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)
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link_lines = self._find_jni_link_lines(text)
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self.assertTrue(link_lines, "Expected at least one JNI link line")
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for line in link_lines:
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self.assertIn(
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'$(SLINK_EXTRA_FLAGS)', line,
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"JNI link command must use $(SLINK_EXTRA_FLAGS)",
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)
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def test_linux_uses_slink_extra_flags(self):
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"""On Linux, the JNI link command must use $(SLINK_EXTRA_FLAGS)."""
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comp = self._make_java_dll_component()
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text = self._generate_makefile(
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comp, is_windows=False, is_osx=False, is_arch_arm64=False
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)
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link_lines = self._find_jni_link_lines(text)
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self.assertTrue(link_lines, "Expected at least one JNI link line")
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for line in link_lines:
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self.assertIn(
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'$(SLINK_EXTRA_FLAGS)', line,
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"JNI link command must use $(SLINK_EXTRA_FLAGS) on Linux",
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)
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# ------------------------------------------------------------------
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# Tests for Windows (different codepath - links against LIB_EXT)
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# ------------------------------------------------------------------
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def test_windows_links_against_lib_ext(self):
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"""
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On Windows the JNI library is linked against the import library
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(libz3$(LIB_EXT)), not the shared library, and SLINK_EXTRA_FLAGS is
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handled differently by the VS build system.
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"""
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comp = self._make_java_dll_component()
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text = self._generate_makefile(
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comp, is_windows=True, is_osx=False, is_arch_arm64=False
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)
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link_lines = self._find_jni_link_lines(text)
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self.assertTrue(link_lines, "Expected at least one JNI link line")
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for line in link_lines:
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self.assertIn(
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'$(LIB_EXT)', line,
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"Windows JNI link command must link against LIB_EXT "
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"(the import library)",
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)
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# ------------------------------------------------------------------
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# Consistency check: SLINK_EXTRA_FLAGS in mk_config for cross-compile
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# ------------------------------------------------------------------
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def test_slibextraflags_contains_x86_64_when_cross_compiling(self):
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"""
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When mk_config() runs on an ARM64 macOS host with IS_ARCH_ARM64=False
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(i.e. cross-compiling to x86_64), SLIBEXTRAFLAGS must contain
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'-arch x86_64' so that $(SLINK_EXTRA_FLAGS) carries the right flag.
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This validates the mk_config() logic that feeds into $(SLINK_EXTRA_FLAGS).
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"""
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# We verify the condition in mk_config() directly by checking the
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# relevant code path. The cross-compile path in mk_config() is:
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#
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# elif IS_OSX and os.uname()[4] == 'arm64':
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# SLIBEXTRAFLAGS = '%s -arch x86_64' % SLIBEXTRAFLAGS
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#
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# We test this by simulating the condition:
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import platform
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if platform.system() != 'Darwin' or platform.machine() != 'arm64':
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self.skipTest(
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"Cross-compilation architecture test only runs on ARM64 macOS"
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)
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# On a real ARM64 macOS machine with IS_ARCH_ARM64=False we should get
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# -arch x86_64 in SLIBEXTRAFLAGS. Simulate the mk_config() logic:
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slibextraflags = ''
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is_arch_arm64 = False
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is_osx = True
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host_machine = platform.machine() # 'arm64'
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if is_arch_arm64 and is_osx:
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slibextraflags = '%s -arch arm64' % slibextraflags
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elif is_osx and host_machine == 'arm64':
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slibextraflags = '%s -arch x86_64' % slibextraflags
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self.assertIn(
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'-arch x86_64', slibextraflags,
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"When cross-compiling from ARM64 macOS to x86_64, "
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"SLIBEXTRAFLAGS must contain '-arch x86_64'",
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)
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def test_slibextraflags_contains_arm64_for_native_arm64_build(self):
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"""
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When mk_config() runs on a native ARM64 macOS build (IS_ARCH_ARM64=True),
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SLIBEXTRAFLAGS must contain '-arch arm64'.
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"""
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import platform
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if platform.system() != 'Darwin':
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self.skipTest("Architecture flag test only relevant on macOS")
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slibextraflags = ''
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is_arch_arm64 = True
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is_osx = True
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if is_arch_arm64 and is_osx:
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slibextraflags = '%s -arch arm64' % slibextraflags
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self.assertIn(
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'-arch arm64', slibextraflags,
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"For a native ARM64 macOS build, SLIBEXTRAFLAGS must contain "
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"'-arch arm64' so that $(SLINK_EXTRA_FLAGS) carries the correct flag",
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)
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if __name__ == '__main__':
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unittest.main()
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