Merge branch 'aseitz/pprinter-chroot-compile' into 'main'

Support chroot compilation via binary printer for nightly tests

See merge request rewriting/ddisasm!1193

tests/disassemble_reassemble_check.py

@@ -4,7 +4,9 @@
 import os
 import shlex
 import shutil
+import stat
 import subprocess
+import tempfile
 from dataclasses import dataclass
 from pathlib import Path
 from timeit import default_timer as timer
@@ -242,18 +244,46 @@ def binary_print(
         binary_path,
     ]
 
-    if compiler:
-        cmd.append(f"--use-gcc={compiler}")
-    if build_object:
-        cmd.append("--object")
-    for flag in extra_flags:
-        cmd.append(f"--compiler-arg={flag}")
-
-    print("# Binary printing", ir_path, "into", binary_path)
-    return subprocess.run(
-        cmd,
-        check=check,
-    )
+    with contextlib.ExitStack() as stack:
+        if MAKE_CHROOT:
+            # Generate a script that executes the compiler in the chroot, and
+            # instruct gtirb-pprinter to use this script instead of gcc.
+            chroot_args = build_chroot_wrapper()
+            chroot_args.append(compiler or "gcc")
+            chroot_args.append("$@")
+            script_content = (
+                "#!/bin/bash\n"
+                # Copy intermediate files generated by gtirb-pprinter into the
+                # chroot tmp directory, so they exist where they are specified
+                # by the arguments generated by gtirb-pprinter.
+                f"cp -r /tmp {MAKE_CHROOT_ROOT}\n"
+                # Run gcc in the chroot.
+                f'{" ".join(chroot_args)}\n'
+                # gtirb-pprinter creates results in /tmp and then copies to
+                # the destination, so we have to copy /tmp files back.
+                f"cp -r {MAKE_CHROOT_ROOT}/tmp/* /tmp\n"
+                # Clean up the files we created.
+                f"rm -r {MAKE_CHROOT_ROOT}/tmp/*\n"
+            )
+
+            tmpdir = Path(stack.enter_context(tempfile.TemporaryDirectory()))
+            chroot_script = tmpdir / "compile.sh"
+            chroot_script.write_text(script_content)
+            chroot_script.chmod(chroot_script.stat().st_mode | stat.S_IXUSR)
+
+            cmd.append(f"--use-gcc={chroot_script}")
+        elif compiler:
+            cmd.append(f"--use-gcc={compiler}")
+        if build_object:
+            cmd.append("--object")
+        for flag in extra_flags:
+            cmd.append(f"--compiler-arg={flag}")
+
+        print("# Binary printing", ir_path, "into", binary_path)
+        return subprocess.run(
+            cmd,
+            check=check,
+        )
 
 
 def link(