ci(linux): collect core dumps

.github/workflows/checks.yml

@@ -160,6 +160,11 @@ jobs:
             python3.{5..11} \
             python3.10-full python3.10-dev
 
+          python3.10 -m venv .venv
+          source .venv/bin/activate
+          pip install --upgrade pip
+          pip install -r test/requirements.txt
+
       - name: Compile Austin
         run: |
           autoreconf --install
@@ -168,14 +173,10 @@ jobs:
 
       - name: Run tests
         run: |
+          echo "core.%p" | sudo tee /proc/sys/kernel/core_pattern
           ulimit -c unlimited
-          python3.10 -m venv .venv
-          source .venv/bin/activate
-          pip install --upgrade pip
-          pip install -r test/requirements.txt
           .venv/bin/pytest --pastebin=failed -sr fE -n auto || true
           sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -sr fE -n auto || true
-          deactivate
 
       - name: Generate Cobertura report
         run: gcovr --xml ./cobertura.xml -r src/

.github/workflows/tests.yml

@@ -96,8 +96,7 @@ jobs:
           sudo apt-get update
           sudo apt-get -y install \
             valgrind \
-            gdb \
-            systemd-coredump
+            gdb
 
       - name: Install Python
         uses: actions/setup-python@v4
@@ -114,37 +113,61 @@ jobs:
           source .venv/bin/activate
           pip install --upgrade pip
           pip install -r test/requirements.txt
+
+      - name: Set core dump file pattern
+        run: |
+          echo "core.%p" | sudo tee /proc/sys/kernel/core_pattern
+
           ulimit -c unlimited
+          python3.10 -c "import ctypes;ctypes.string_at(0)" || true
+          ls core.*
+          rm core.*
 
       - name: Run unit tests
-        run: .venv/bin/pytest -sv test/cunit
+        run: |
+          ulimit -c unlimited
+          .venv/bin/pytest -sv test/cunit
 
       - name: Run functional Austin tests (with sudo)
-        run: sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "not austinp"
+        run: |
+          ulimit -c unlimited
+          sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "not austinp"
         if: always()
 
       - name: Run functional Austin tests (without sudo)
-        run: .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "not austinp"
+        run: |
+          ulimit -c unlimited
+          .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "not austinp"
         if: always()
 
       - name: Run functional austinp tests (with sudo)
-        run: sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "austinp"
+        run: |
+          ulimit -c unlimited
+          sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "austinp"
         if: always()
 
       - name: Run functional austinp tests (without sudo)
-        run: .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "austinp"
+        run: |
+          ulimit -c unlimited
+          .venv/bin/pytest --pastebin=failed -svr a test/functional -n auto -k "austinp"
         if: always()
 
       - name: Run integrity tests (with sudo)
-        run: sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/integrity
+        run: |
+          ulimit -c unlimited
+          sudo -E env PATH="$PATH" .venv/bin/pytest --pastebin=failed -svr a test/integrity
         if: always()
 
       - name: Run integrity tests (without sudo)
-        run: .venv/bin/pytest --pastebin=failed -svr a test/integrity
+        run: |
+          ulimit -c unlimited
+          .venv/bin/pytest --pastebin=failed -svr a test/integrity
         if: always()
 
       - name: Run support tests
-        run: .venv/bin/pytest -sv test/support
+        run: |
+          ulimit -c unlimited
+          .venv/bin/pytest -sv test/support
         if: always()
 
   wheels-linux:
@@ -484,6 +507,7 @@ jobs:
       - name: Run data validation
         run: |
           ulimit -c unlimited
+          echo "core.%p" | sudo tee /proc/sys/kernel/core_pattern
 
           source .venv/bin/activate
           python scripts/validation.py --ignore-errors

test/cunit/conftest.py

@@ -3,9 +3,9 @@
 import typing as t
 from pathlib import Path
 from subprocess import PIPE
-from subprocess import run
 from test.cunit import SRC
 from test.utils import bt
+from test.utils import run
 from types import FunctionType
 
 import pytest
@@ -55,7 +55,9 @@ def _(*_, **__):
 
         if result.returncode == -11:
             binary_name = Path(module).stem.replace("test_", "")
-            raise SegmentationFault(bt((SRC / binary_name).with_suffix(".so")))
+            raise SegmentationFault(
+                bt((SRC / binary_name).with_suffix(".so"), result.pid)
+            )
 
         raise CUnitTestFailure(
             f"\n{result.stdout.decode()}\n"

test/utils.py

@@ -110,9 +110,10 @@ def apport_unpack(report: Path, target_dir: Path):
     ).decode()
 
 
-def bt(binary: Path) -> str:
-    if Path("core").is_file():
-        return gdb(["bt full", "q"], str(binary), "core")
+def bt(binary: Path, pid: int) -> str:
+    core_file = f"core.{pid}"
+    if Path(core_file).is_file():
+        return gdb(["bt full", "q"], str(binary), core_file)
 
     # On Ubuntu, apport puts crashes in /var/crash
     crash_dir = Path("/var/crash")
@@ -155,7 +156,8 @@ def collect_logs(variant: str, pid: int) -> List[str]:
 EXEEXT = ".exe" if platform.system() == "Windows" else ""
 
 
-# Taken from the subprocess module
+# Taken from the subprocess module. We make our own version that can also
+# propagate the PID.
 def run(
     *popenargs, input=None, capture_output=False, timeout=None, check=False, **kwargs
 ):
@@ -248,7 +250,7 @@ def __call__(
             raise
 
         if result.returncode in (-11, 139):  # SIGSEGV
-            print(bt(self.path))
+            print(bt(self.path, result.pid))
 
         if mojo and not ({"-o", "-w", "--output", "--where"} & set(args)):
             # We produce MOJO binary data only if we are not writing to file