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-rw-r--r--lib/spack/spack/binary_distribution.py12
-rw-r--r--lib/spack/spack/relocate.py164
-rw-r--r--lib/spack/spack/spec.py7
-rw-r--r--lib/spack/spack/test/conftest.py16
-rw-r--r--lib/spack/spack/test/relocate.py193
-rw-r--r--lib/spack/spack/test/rewiring.py2
6 files changed, 311 insertions, 83 deletions
diff --git a/lib/spack/spack/binary_distribution.py b/lib/spack/spack/binary_distribution.py
index 5ea7138a16..3967afdfd8 100644
--- a/lib/spack/spack/binary_distribution.py
+++ b/lib/spack/spack/binary_distribution.py
@@ -1600,13 +1600,19 @@ def relocate_package(spec, allow_root):
install_path = spack.hooks.sbang.sbang_install_path()
prefix_to_prefix_text[old_sbang_install_path] = install_path
+ # First match specific prefix paths. Possibly the *local* install prefix
+ # of some dependency is in an upstream, so we cannot assume the original
+ # spack store root can be mapped uniformly to the new spack store root.
+ for orig_prefix, hash in prefix_to_hash.items():
+ prefix_to_prefix_text[orig_prefix] = hash_to_prefix.get(hash, None)
+ prefix_to_prefix_bin[orig_prefix] = hash_to_prefix.get(hash, None)
+
+ # Only then add the generic fallback of install prefix -> install prefix.
prefix_to_prefix_text[old_prefix] = new_prefix
prefix_to_prefix_bin[old_prefix] = new_prefix
prefix_to_prefix_text[old_layout_root] = new_layout_root
prefix_to_prefix_bin[old_layout_root] = new_layout_root
- for orig_prefix, hash in prefix_to_hash.items():
- prefix_to_prefix_text[orig_prefix] = hash_to_prefix.get(hash, None)
- prefix_to_prefix_bin[orig_prefix] = hash_to_prefix.get(hash, None)
+
# This is vestigial code for the *old* location of sbang. Previously,
# sbang was a bash script, and it lived in the spack prefix. It is
# now a POSIX script that lives in the install prefix. Old packages
diff --git a/lib/spack/spack/relocate.py b/lib/spack/spack/relocate.py
index b8c47b5864..7ac19574ce 100644
--- a/lib/spack/spack/relocate.py
+++ b/lib/spack/spack/relocate.py
@@ -61,23 +61,30 @@ class BinaryStringReplacementError(spack.error.SpackError):
class BinaryTextReplaceError(spack.error.SpackError):
- def __init__(self, old_path, new_path):
- """Raised when the new install path is longer than the
- old one, so binary text replacement cannot occur.
+ def __init__(self, msg):
+ msg += (
+ " To fix this, compile with more padding "
+ "(config:install_tree:padded_length), or install to a shorter prefix."
+ )
+ super(BinaryTextReplaceError, self).__init__(msg)
- Args:
- old_path (str): original path to be substituted
- new_path (str): candidate path for substitution
- """
- msg = "New path longer than old path: binary text"
- msg += " replacement not possible."
- err_msg = "The new path %s" % new_path
- err_msg += " is longer than the old path %s.\n" % old_path
- err_msg += "Text replacement in binaries will not work.\n"
- err_msg += "Create buildcache from an install path "
- err_msg += "longer than new path."
- super(BinaryTextReplaceError, self).__init__(msg, err_msg)
+class CannotGrowString(BinaryTextReplaceError):
+ def __init__(self, old, new):
+ msg = "Cannot replace {!r} with {!r} because the new prefix is longer.".format(old, new)
+ super(CannotGrowString, self).__init__(msg)
+
+
+class CannotShrinkCString(BinaryTextReplaceError):
+ def __init__(self, old, new, full_old_string):
+ # Just interpolate binary string to not risk issues with invalid
+ # unicode, which would be really bad user experience: error in error.
+ # We have no clue if we actually deal with a real C-string nor what
+ # encoding it has.
+ msg = "Cannot replace {!r} with {!r} in the C-string {!r}.".format(
+ old, new, full_old_string
+ )
+ super(CannotShrinkCString, self).__init__(msg)
@memoized
@@ -451,43 +458,116 @@ def _replace_prefix_text(filename, compiled_prefixes):
f.truncate()
-def _replace_prefix_bin(filename, byte_prefixes):
- """Replace all the occurrences of the old install prefix with a
- new install prefix in binary files.
+def apply_binary_replacements(f, prefix_to_prefix, suffix_safety_size=7):
+ """
+ Given a file opened in rb+ mode, apply the string replacements as
+ specified by an ordered dictionary of prefix to prefix mappings. This
+ method takes special care of null-terminated C-strings. C-string constants
+ are problematic because compilers and linkers optimize readonly strings for
+ space by aliasing those that share a common suffix (only suffix since all
+ of them are null terminated). See https://github.com/spack/spack/pull/31739
+ and https://github.com/spack/spack/pull/32253 for details. Our logic matches
+ the original prefix with a ``suffix_safety_size + 1`` lookahead for null bytes.
+ If no null terminator is found, we simply pad with leading /, assuming that
+ it's a long C-string; the full C-string after replacement has a large suffix
+ in common with its original value.
+ If there *is* a null terminator we can do the same as long as the replacement
+ has a sufficiently long common suffix with the original prefix.
+ As a last resort when the replacement does not have a long enough common suffix,
+ we can try to shorten the string, but this only works if the new length is
+ sufficiently short (typically the case when going from large padding -> normal path)
+ If the replacement string is longer, or all of the above fails, we error out.
+
+ Arguments:
+ f: file opened in rb+ mode
+ prefix_to_prefix (OrderedDict): OrderedDictionary where the keys are
+ bytes representing the old prefixes and the values are the new
+ suffix_safety_size (int): in case of null terminated strings, what size
+ of the suffix should remain to avoid aliasing issues?
+ """
+ assert suffix_safety_size >= 0
+ assert f.tell() == 0
+
+ # Look for exact matches of our paths, and also look if there's a null terminator
+ # soon after (this covers the case where we search for /abc but match /abc/ with
+ # a trailing dir seperator).
+ regex = re.compile(
+ b"("
+ + b"|".join(re.escape(p) for p in prefix_to_prefix.keys())
+ + b")([^\0]{0,%d}\0)?" % suffix_safety_size
+ )
+
+ # We *could* read binary data in chunks to avoid loading all in memory,
+ # but it's nasty to deal with matches across boundaries, so let's stick to
+ # something simple.
+
+ for match in regex.finditer(f.read()):
+ # The matching prefix (old) and its replacement (new)
+ old = match.group(1)
+ new = prefix_to_prefix[old]
+
+ # Did we find a trailing null within a N + 1 bytes window after the prefix?
+ null_terminated = match.end(0) > match.end(1)
+
+ # Suffix string length, excluding the null byte
+ # Only makes sense if null_terminated
+ suffix_strlen = match.end(0) - match.end(1) - 1
+
+ # How many bytes are we shrinking our string?
+ bytes_shorter = len(old) - len(new)
+
+ # We can't make strings larger.
+ if bytes_shorter < 0:
+ raise CannotGrowString(old, new)
+
+ # If we don't know whether this is a null terminated C-string (we're looking
+ # only N + 1 bytes ahead), or if it is and we have a common suffix, we can
+ # simply pad with leading dir separators.
+ elif (
+ not null_terminated
+ or suffix_strlen >= suffix_safety_size # == is enough, but let's be defensive
+ or old[-suffix_safety_size + suffix_strlen :]
+ == new[-suffix_safety_size + suffix_strlen :]
+ ):
+ replacement = b"/" * bytes_shorter + new
+
+ # If it *was* null terminated, all that matters is that we can leave N bytes
+ # of old suffix in place. Note that > is required since we also insert an
+ # additional null terminator.
+ elif bytes_shorter > suffix_safety_size:
+ replacement = new + match.group(2) # includes the trailing null
+
+ # Otherwise... we can't :(
+ else:
+ raise CannotShrinkCString(old, new, match.group()[:-1])
- The new install prefix is prefixed with ``b'/'`` until the
- lengths of the prefixes are the same.
+ f.seek(match.start())
+ f.write(replacement)
+
+
+def _replace_prefix_bin(filename, prefix_to_prefix):
+ """Replace all the occurrences of the old prefix with a new prefix in binary
+ files. See :func:`~spack.relocate.apply_binary_replacements` for details.
Args:
filename (str): target binary file
- byte_prefixes (OrderedDict): OrderedDictionary where the keys are
- binary strings of the old prefixes and the values are the new
- binary prefixes
+ byte_prefixes (OrderedDict): ordered dictionary where the keys are
+ bytes representing the old prefixes and the values are the new
+ prefixes (all bytes utf-8 encoded)
"""
- all_prefixes = re.compile(b"|".join(re.escape(prefix) for prefix in byte_prefixes.keys()))
-
- def padded_replacement(old):
- new = byte_prefixes[old]
- pad = len(old) - len(new)
- if pad < 0:
- raise BinaryTextReplaceError(old, new)
- return new + b"/" * pad
with open(filename, "rb+") as f:
- # Register what replacement string to put on what offsets in the file.
- replacements_at_offset = [
- (padded_replacement(m.group(0)), m.start())
- for m in re.finditer(all_prefixes, f.read())
- ]
-
- # Apply the replacements
- for replacement, offset in replacements_at_offset:
- f.seek(offset)
- f.write(replacement)
+ apply_binary_replacements(f, prefix_to_prefix)
def relocate_macho_binaries(
- path_names, old_layout_root, new_layout_root, prefix_to_prefix, rel, old_prefix, new_prefix
+ path_names,
+ old_layout_root,
+ new_layout_root,
+ prefix_to_prefix,
+ rel,
+ old_prefix,
+ new_prefix,
):
"""
Use macholib python package to get the rpaths, depedent libraries
diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py
index a419fdf057..3b8ed07a83 100644
--- a/lib/spack/spack/spec.py
+++ b/lib/spack/spack/spec.py
@@ -1741,7 +1741,12 @@ class Spec(object):
return hash.override(self)
node_dict = self.to_node_dict(hash=hash)
json_text = sjson.dump(node_dict)
- return spack.util.hash.b32_hash(json_text)
+ # This implements "frankenhashes", preserving the last 7 characters of the
+ # original hash when splicing so that we can avoid relocation issues
+ out = spack.util.hash.b32_hash(json_text)
+ if self.build_spec is not self:
+ return out[:-7] + self.build_spec.spec_hash(hash)[-7:]
+ return out
def _cached_hash(self, hash, length=None, force=False):
"""Helper function for storing a cached hash on the spec.
diff --git a/lib/spack/spack/test/conftest.py b/lib/spack/spack/test/conftest.py
index 2ab8c89c3b..6516c9c01f 100644
--- a/lib/spack/spack/test/conftest.py
+++ b/lib/spack/spack/test/conftest.py
@@ -1643,7 +1643,7 @@ def mock_executable(tmpdir):
"""
import jinja2
- shebang = "#!/bin/bash\n" if not is_windows else "@ECHO OFF"
+ shebang = "#!/bin/sh\n" if not is_windows else "@ECHO OFF"
def _factory(name, output, subdir=("bin",)):
f = tmpdir.ensure(*subdir, dir=True).join(name)
@@ -1808,14 +1808,24 @@ def mock_tty_stdout(monkeypatch):
monkeypatch.setattr(sys.stdout, "isatty", lambda: True)
+@pytest.fixture
+def prefix_like():
+ return "package-0.0.0.a1-hashhashhashhashhashhashhashhash"
+
+
+@pytest.fixture()
+def prefix_tmpdir(tmpdir, prefix_like):
+ return tmpdir.mkdir(prefix_like)
+
+
@pytest.fixture()
-def binary_with_rpaths(tmpdir):
+def binary_with_rpaths(prefix_tmpdir):
"""Factory fixture that compiles an ELF binary setting its RPATH. Relative
paths are encoded with `$ORIGIN` prepended.
"""
def _factory(rpaths, message="Hello world!"):
- source = tmpdir.join("main.c")
+ source = prefix_tmpdir.join("main.c")
source.write(
"""
#include <stdio.h>
diff --git a/lib/spack/spack/test/relocate.py b/lib/spack/spack/test/relocate.py
index da6d800e0a..b07f8402df 100644
--- a/lib/spack/spack/test/relocate.py
+++ b/lib/spack/spack/test/relocate.py
@@ -2,6 +2,7 @@
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+import io
import os
import os.path
import re
@@ -141,13 +142,13 @@ def make_object_file(tmpdir):
@pytest.fixture()
-def copy_binary():
+def copy_binary(prefix_like):
"""Returns a function that copies a binary somewhere and
returns the new location.
"""
def _copy_somewhere(orig_binary):
- new_root = orig_binary.mkdtemp()
+ new_root = orig_binary.mkdtemp().mkdir(prefix_like)
new_binary = new_root.join("main.x")
shutil.copy(str(orig_binary), str(new_binary))
return new_binary
@@ -261,29 +262,33 @@ def test_set_elf_rpaths_warning(mock_patchelf):
@pytest.mark.requires_executables("patchelf", "strings", "file", "gcc")
@skip_unless_linux
-def test_replace_prefix_bin(binary_with_rpaths):
+def test_replace_prefix_bin(binary_with_rpaths, prefix_like):
+ prefix = "/usr/" + prefix_like
+ prefix_bytes = prefix.encode("utf-8")
+ new_prefix = "/foo/" + prefix_like
+ new_prefix_bytes = new_prefix.encode("utf-8")
# Compile an "Hello world!" executable and set RPATHs
- executable = binary_with_rpaths(rpaths=["/usr/lib", "/usr/lib64"])
+ executable = binary_with_rpaths(rpaths=[prefix + "/lib", prefix + "/lib64"])
# Relocate the RPATHs
- spack.relocate._replace_prefix_bin(str(executable), {b"/usr": b"/foo"})
+ spack.relocate._replace_prefix_bin(str(executable), {prefix_bytes: new_prefix_bytes})
# Some compilers add rpaths so ensure changes included in final result
- assert "/foo/lib:/foo/lib64" in rpaths_for(executable)
+ assert "%s/lib:%s/lib64" % (new_prefix, new_prefix) in rpaths_for(executable)
@pytest.mark.requires_executables("patchelf", "strings", "file", "gcc")
@skip_unless_linux
-def test_relocate_elf_binaries_absolute_paths(binary_with_rpaths, copy_binary, tmpdir):
+def test_relocate_elf_binaries_absolute_paths(binary_with_rpaths, copy_binary, prefix_tmpdir):
# Create an executable, set some RPATHs, copy it to another location
- orig_binary = binary_with_rpaths(rpaths=[str(tmpdir.mkdir("lib")), "/usr/lib64"])
+ orig_binary = binary_with_rpaths(rpaths=[str(prefix_tmpdir.mkdir("lib")), "/usr/lib64"])
new_binary = copy_binary(orig_binary)
spack.relocate.relocate_elf_binaries(
binaries=[str(new_binary)],
orig_root=str(orig_binary.dirpath()),
new_root=None, # Not needed when relocating absolute paths
- new_prefixes={str(tmpdir): "/foo"},
+ new_prefixes={str(orig_binary.dirpath()): "/foo"},
rel=False,
# Not needed when relocating absolute paths
orig_prefix=None,
@@ -317,9 +322,13 @@ def test_relocate_elf_binaries_relative_paths(binary_with_rpaths, copy_binary):
@pytest.mark.requires_executables("patchelf", "strings", "file", "gcc")
@skip_unless_linux
-def test_make_elf_binaries_relative(binary_with_rpaths, copy_binary, tmpdir):
+def test_make_elf_binaries_relative(binary_with_rpaths, copy_binary, prefix_tmpdir):
orig_binary = binary_with_rpaths(
- rpaths=[str(tmpdir.mkdir("lib")), str(tmpdir.mkdir("lib64")), "/opt/local/lib"]
+ rpaths=[
+ str(prefix_tmpdir.mkdir("lib")),
+ str(prefix_tmpdir.mkdir("lib64")),
+ "/opt/local/lib",
+ ]
)
new_binary = copy_binary(orig_binary)
@@ -339,15 +348,19 @@ def test_raise_if_not_relocatable(monkeypatch):
@pytest.mark.requires_executables("patchelf", "strings", "file", "gcc")
@skip_unless_linux
-def test_relocate_text_bin(binary_with_rpaths, copy_binary, tmpdir):
+def test_relocate_text_bin(binary_with_rpaths, copy_binary, prefix_tmpdir):
orig_binary = binary_with_rpaths(
- rpaths=[str(tmpdir.mkdir("lib")), str(tmpdir.mkdir("lib64")), "/opt/local/lib"],
- message=str(tmpdir),
+ rpaths=[
+ str(prefix_tmpdir.mkdir("lib")),
+ str(prefix_tmpdir.mkdir("lib64")),
+ "/opt/local/lib",
+ ],
+ message=str(prefix_tmpdir),
)
new_binary = copy_binary(orig_binary)
- # Check original directory is in the executabel and the new one is not
- assert text_in_bin(str(tmpdir), new_binary)
+ # Check original directory is in the executable and the new one is not
+ assert text_in_bin(str(prefix_tmpdir), new_binary)
assert not text_in_bin(str(new_binary.dirpath()), new_binary)
# Check this call succeed
@@ -358,7 +371,7 @@ def test_relocate_text_bin(binary_with_rpaths, copy_binary, tmpdir):
# Check original directory is not there anymore and it was
# substituted with the new one
- assert not text_in_bin(str(tmpdir), new_binary)
+ assert not text_in_bin(str(prefix_tmpdir), new_binary)
assert text_in_bin(str(new_binary.dirpath()), new_binary)
@@ -450,30 +463,144 @@ def test_utf8_paths_to_single_binary_regex():
assert regex.search(string).group(0) == b"/safe/[a-z]/file"
-def test_ordered_replacement(tmpdir):
+def test_ordered_replacement():
# This tests whether binary text replacement respects order, so that
# a long package prefix is replaced before a shorter sub-prefix like
# the root of the spack store (as a fallback).
- def replace_and_expect(prefix_map, before, after):
- file = str(tmpdir.join("file"))
- with open(file, "wb") as f:
- f.write(before)
- spack.relocate._replace_prefix_bin(file, prefix_map)
- with open(file, "rb") as f:
- assert f.read() == after
+ def replace_and_expect(prefix_map, before, after=None, suffix_safety_size=7):
+ f = io.BytesIO(before)
+ spack.relocate.apply_binary_replacements(f, OrderedDict(prefix_map), suffix_safety_size)
+ f.seek(0)
+ assert f.read() == after
+ # The case of having a non-null terminated common suffix.
replace_and_expect(
- OrderedDict(
- [(b"/old-spack/opt/specific-package", b"/first"), (b"/old-spack/opt", b"/second")]
- ),
+ [
+ (b"/old-spack/opt/specific-package", b"/first/specific-package"),
+ (b"/old-spack/opt", b"/sec/spack/opt"),
+ ],
b"Binary with /old-spack/opt/specific-package and /old-spack/opt",
- b"Binary with /first///////////////////////// and /second///////",
+ b"Binary with /////////first/specific-package and /sec/spack/opt",
+ suffix_safety_size=7,
)
+ # The case of having a direct null terminated common suffix.
replace_and_expect(
- OrderedDict(
- [(b"/old-spack/opt", b"/second"), (b"/old-spack/opt/specific-package", b"/first")]
- ),
+ [
+ (b"/old-spack/opt/specific-package", b"/first/specific-package"),
+ (b"/old-spack/opt", b"/sec/spack/opt"),
+ ],
+ b"Binary with /old-spack/opt/specific-package\0 and /old-spack/opt\0",
+ b"Binary with /////////first/specific-package\0 and /sec/spack/opt\0",
+ suffix_safety_size=7,
+ )
+
+ # Testing the order of operations (not null terminated, long enough common suffix)
+ replace_and_expect(
+ [
+ (b"/old-spack/opt", b"/s/spack/opt"),
+ (b"/old-spack/opt/specific-package", b"/first/specific-package"),
+ ],
b"Binary with /old-spack/opt/specific-package and /old-spack/opt",
- b"Binary with /second////////specific-package and /second///////",
+ b"Binary with ///s/spack/opt/specific-package and ///s/spack/opt",
+ suffix_safety_size=7,
+ )
+
+ # Testing the order of operations (null terminated, long enough common suffix)
+ replace_and_expect(
+ [
+ (b"/old-spack/opt", b"/s/spack/opt"),
+ (b"/old-spack/opt/specific-package", b"/first/specific-package"),
+ ],
+ b"Binary with /old-spack/opt/specific-package\0 and /old-spack/opt\0",
+ b"Binary with ///s/spack/opt/specific-package\0 and ///s/spack/opt\0",
+ suffix_safety_size=7,
+ )
+
+ # Null terminated within the lookahead window, common suffix long enough
+ replace_and_expect(
+ [(b"/old-spack/opt/specific-package", b"/opt/specific-XXXXage")],
+ b"Binary with /old-spack/opt/specific-package/sub\0 data",
+ b"Binary with ///////////opt/specific-XXXXage/sub\0 data",
+ suffix_safety_size=7,
+ )
+
+ # Null terminated within the lookahead window, common suffix too short, but
+ # shortening is enough to spare more than 7 bytes of old suffix.
+ replace_and_expect(
+ [(b"/old-spack/opt/specific-package", b"/opt/specific-XXXXXge")],
+ b"Binary with /old-spack/opt/specific-package/sub\0 data",
+ b"Binary with /opt/specific-XXXXXge/sub\0ckage/sub\0 data", # ckage/sub = 9 bytes
+ suffix_safety_size=7,
+ )
+
+ # Null terminated within the lookahead window, common suffix too short,
+ # shortening leaves exactly 7 suffix bytes untouched, amazing!
+ replace_and_expect(
+ [(b"/old-spack/opt/specific-package", b"/spack/specific-XXXXXge")],
+ b"Binary with /old-spack/opt/specific-package/sub\0 data",
+ b"Binary with /spack/specific-XXXXXge/sub\0age/sub\0 data", # age/sub = 7 bytes
+ suffix_safety_size=7,
)
+
+ # Null terminated within the lookahead window, common suffix too short,
+ # shortening doesn't leave space for 7 bytes, sad!
+ error_msg = "Cannot replace {!r} with {!r} in the C-string {!r}.".format(
+ b"/old-spack/opt/specific-package",
+ b"/snacks/specific-XXXXXge",
+ b"/old-spack/opt/specific-package/sub",
+ )
+ with pytest.raises(spack.relocate.CannotShrinkCString, match=error_msg):
+ replace_and_expect(
+ [(b"/old-spack/opt/specific-package", b"/snacks/specific-XXXXXge")],
+ b"Binary with /old-spack/opt/specific-package/sub\0 data",
+ # expect failure!
+ suffix_safety_size=7,
+ )
+
+ # Check that it works when changing suffix_safety_size.
+ replace_and_expect(
+ [(b"/old-spack/opt/specific-package", b"/snacks/specific-XXXXXXe")],
+ b"Binary with /old-spack/opt/specific-package/sub\0 data",
+ b"Binary with /snacks/specific-XXXXXXe/sub\0ge/sub\0 data",
+ suffix_safety_size=6,
+ )
+
+ # Finally check the case of no shortening but a long enough common suffix.
+ replace_and_expect(
+ [(b"pkg-gwixwaalgczp6", b"pkg-zkesfralgczp6")],
+ b"Binary with pkg-gwixwaalgczp6/config\0 data",
+ b"Binary with pkg-zkesfralgczp6/config\0 data",
+ suffix_safety_size=7,
+ )
+
+ # Too short matching suffix, identical string length
+ error_msg = "Cannot replace {!r} with {!r} in the C-string {!r}.".format(
+ b"pkg-gwixwaxlgczp6",
+ b"pkg-zkesfrzlgczp6",
+ b"pkg-gwixwaxlgczp6",
+ )
+ with pytest.raises(spack.relocate.CannotShrinkCString, match=error_msg):
+ replace_and_expect(
+ [(b"pkg-gwixwaxlgczp6", b"pkg-zkesfrzlgczp6")],
+ b"Binary with pkg-gwixwaxlgczp6\0 data",
+ # expect failure
+ suffix_safety_size=7,
+ )
+
+ # Finally, make sure that the regex is not greedily finding the LAST null byte
+ # it should find the first null byte in the window. In this test we put one null
+ # at a distance where we cant keep a long enough suffix, and one where we can,
+ # so we should expect failure when the first null is used.
+ error_msg = "Cannot replace {!r} with {!r} in the C-string {!r}.".format(
+ b"pkg-abcdef",
+ b"pkg-xyzabc",
+ b"pkg-abcdef",
+ )
+ with pytest.raises(spack.relocate.CannotShrinkCString, match=error_msg):
+ replace_and_expect(
+ [(b"pkg-abcdef", b"pkg-xyzabc")],
+ b"Binary with pkg-abcdef\0/xx\0", # def\0/xx is 7 bytes.
+ # expect failure
+ suffix_safety_size=7,
+ )
diff --git a/lib/spack/spack/test/rewiring.py b/lib/spack/spack/test/rewiring.py
index 936ba1e78a..085fb950bb 100644
--- a/lib/spack/spack/test/rewiring.py
+++ b/lib/spack/spack/test/rewiring.py
@@ -18,7 +18,7 @@ args = ["strings", "file"]
if sys.platform == "darwin":
args.extend(["/usr/bin/clang++", "install_name_tool"])
else:
- args.extend(["/usr/bin/g++", "patchelf"])
+ args.extend(["g++", "patchelf"])
@pytest.mark.requires_executables(*args)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-02-16 16:49:14 +0000