472 lines
16 KiB
Python
472 lines
16 KiB
Python
"""
|
|
This module contains function to analyse dynamic library
|
|
headers to extract system information
|
|
|
|
Currently only for MacOSX
|
|
|
|
Library file on macosx system starts with Mach-O or Fat field.
|
|
This can be distinguish by first 32 bites and it is called magic number.
|
|
Proper value of magic number is with suffix _MAGIC. Suffix _CIGAM means
|
|
reversed bytes order.
|
|
Both fields can occur in two types: 32 and 64 bytes.
|
|
|
|
FAT field inform that this library contains few version of library
|
|
(typically for different types version). It contains
|
|
information where Mach-O headers starts.
|
|
|
|
Each section started with Mach-O header contains one library
|
|
(So if file starts with this field it contains only one version).
|
|
|
|
After filed Mach-O there are section fields.
|
|
Each of them starts with two fields:
|
|
cmd - magic number for this command
|
|
cmdsize - total size occupied by this section information.
|
|
|
|
In this case only sections LC_VERSION_MIN_MACOSX (for macosx 10.13 and earlier)
|
|
and LC_BUILD_VERSION (for macosx 10.14 and newer) are interesting,
|
|
because them contains information about minimal system version.
|
|
|
|
Important remarks:
|
|
- For fat files this implementation looks for maximum number version.
|
|
It not check if it is 32 or 64 and do not compare it with currently built package.
|
|
So it is possible to false report higher version that needed.
|
|
- All structures signatures are taken form macosx header files.
|
|
- I think that binary format will be more stable than `otool` output.
|
|
and if apple introduce some changes both implementation will need to be updated.
|
|
- The system compile will set the deployment target no lower than
|
|
11.0 for arm64 builds. For "Universal 2" builds use the x86_64 deployment
|
|
target when the arm64 target is 11.0.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import ctypes
|
|
import os
|
|
import sys
|
|
|
|
"""here the needed const and struct from mach-o header files"""
|
|
|
|
FAT_MAGIC = 0xCAFEBABE
|
|
FAT_CIGAM = 0xBEBAFECA
|
|
FAT_MAGIC_64 = 0xCAFEBABF
|
|
FAT_CIGAM_64 = 0xBFBAFECA
|
|
MH_MAGIC = 0xFEEDFACE
|
|
MH_CIGAM = 0xCEFAEDFE
|
|
MH_MAGIC_64 = 0xFEEDFACF
|
|
MH_CIGAM_64 = 0xCFFAEDFE
|
|
|
|
LC_VERSION_MIN_MACOSX = 0x24
|
|
LC_BUILD_VERSION = 0x32
|
|
|
|
CPU_TYPE_ARM64 = 0x0100000C
|
|
|
|
mach_header_fields = [
|
|
("magic", ctypes.c_uint32),
|
|
("cputype", ctypes.c_int),
|
|
("cpusubtype", ctypes.c_int),
|
|
("filetype", ctypes.c_uint32),
|
|
("ncmds", ctypes.c_uint32),
|
|
("sizeofcmds", ctypes.c_uint32),
|
|
("flags", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct mach_header {
|
|
uint32_t magic; /* mach magic number identifier */
|
|
cpu_type_t cputype; /* cpu specifier */
|
|
cpu_subtype_t cpusubtype; /* machine specifier */
|
|
uint32_t filetype; /* type of file */
|
|
uint32_t ncmds; /* number of load commands */
|
|
uint32_t sizeofcmds; /* the size of all the load commands */
|
|
uint32_t flags; /* flags */
|
|
};
|
|
typedef integer_t cpu_type_t;
|
|
typedef integer_t cpu_subtype_t;
|
|
"""
|
|
|
|
mach_header_fields_64 = mach_header_fields + [("reserved", ctypes.c_uint32)]
|
|
"""
|
|
struct mach_header_64 {
|
|
uint32_t magic; /* mach magic number identifier */
|
|
cpu_type_t cputype; /* cpu specifier */
|
|
cpu_subtype_t cpusubtype; /* machine specifier */
|
|
uint32_t filetype; /* type of file */
|
|
uint32_t ncmds; /* number of load commands */
|
|
uint32_t sizeofcmds; /* the size of all the load commands */
|
|
uint32_t flags; /* flags */
|
|
uint32_t reserved; /* reserved */
|
|
};
|
|
"""
|
|
|
|
fat_header_fields = [("magic", ctypes.c_uint32), ("nfat_arch", ctypes.c_uint32)]
|
|
"""
|
|
struct fat_header {
|
|
uint32_t magic; /* FAT_MAGIC or FAT_MAGIC_64 */
|
|
uint32_t nfat_arch; /* number of structs that follow */
|
|
};
|
|
"""
|
|
|
|
fat_arch_fields = [
|
|
("cputype", ctypes.c_int),
|
|
("cpusubtype", ctypes.c_int),
|
|
("offset", ctypes.c_uint32),
|
|
("size", ctypes.c_uint32),
|
|
("align", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct fat_arch {
|
|
cpu_type_t cputype; /* cpu specifier (int) */
|
|
cpu_subtype_t cpusubtype; /* machine specifier (int) */
|
|
uint32_t offset; /* file offset to this object file */
|
|
uint32_t size; /* size of this object file */
|
|
uint32_t align; /* alignment as a power of 2 */
|
|
};
|
|
"""
|
|
|
|
fat_arch_64_fields = [
|
|
("cputype", ctypes.c_int),
|
|
("cpusubtype", ctypes.c_int),
|
|
("offset", ctypes.c_uint64),
|
|
("size", ctypes.c_uint64),
|
|
("align", ctypes.c_uint32),
|
|
("reserved", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct fat_arch_64 {
|
|
cpu_type_t cputype; /* cpu specifier (int) */
|
|
cpu_subtype_t cpusubtype; /* machine specifier (int) */
|
|
uint64_t offset; /* file offset to this object file */
|
|
uint64_t size; /* size of this object file */
|
|
uint32_t align; /* alignment as a power of 2 */
|
|
uint32_t reserved; /* reserved */
|
|
};
|
|
"""
|
|
|
|
segment_base_fields = [("cmd", ctypes.c_uint32), ("cmdsize", ctypes.c_uint32)]
|
|
"""base for reading segment info"""
|
|
|
|
segment_command_fields = [
|
|
("cmd", ctypes.c_uint32),
|
|
("cmdsize", ctypes.c_uint32),
|
|
("segname", ctypes.c_char * 16),
|
|
("vmaddr", ctypes.c_uint32),
|
|
("vmsize", ctypes.c_uint32),
|
|
("fileoff", ctypes.c_uint32),
|
|
("filesize", ctypes.c_uint32),
|
|
("maxprot", ctypes.c_int),
|
|
("initprot", ctypes.c_int),
|
|
("nsects", ctypes.c_uint32),
|
|
("flags", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct segment_command { /* for 32-bit architectures */
|
|
uint32_t cmd; /* LC_SEGMENT */
|
|
uint32_t cmdsize; /* includes sizeof section structs */
|
|
char segname[16]; /* segment name */
|
|
uint32_t vmaddr; /* memory address of this segment */
|
|
uint32_t vmsize; /* memory size of this segment */
|
|
uint32_t fileoff; /* file offset of this segment */
|
|
uint32_t filesize; /* amount to map from the file */
|
|
vm_prot_t maxprot; /* maximum VM protection */
|
|
vm_prot_t initprot; /* initial VM protection */
|
|
uint32_t nsects; /* number of sections in segment */
|
|
uint32_t flags; /* flags */
|
|
};
|
|
typedef int vm_prot_t;
|
|
"""
|
|
|
|
segment_command_fields_64 = [
|
|
("cmd", ctypes.c_uint32),
|
|
("cmdsize", ctypes.c_uint32),
|
|
("segname", ctypes.c_char * 16),
|
|
("vmaddr", ctypes.c_uint64),
|
|
("vmsize", ctypes.c_uint64),
|
|
("fileoff", ctypes.c_uint64),
|
|
("filesize", ctypes.c_uint64),
|
|
("maxprot", ctypes.c_int),
|
|
("initprot", ctypes.c_int),
|
|
("nsects", ctypes.c_uint32),
|
|
("flags", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct segment_command_64 { /* for 64-bit architectures */
|
|
uint32_t cmd; /* LC_SEGMENT_64 */
|
|
uint32_t cmdsize; /* includes sizeof section_64 structs */
|
|
char segname[16]; /* segment name */
|
|
uint64_t vmaddr; /* memory address of this segment */
|
|
uint64_t vmsize; /* memory size of this segment */
|
|
uint64_t fileoff; /* file offset of this segment */
|
|
uint64_t filesize; /* amount to map from the file */
|
|
vm_prot_t maxprot; /* maximum VM protection */
|
|
vm_prot_t initprot; /* initial VM protection */
|
|
uint32_t nsects; /* number of sections in segment */
|
|
uint32_t flags; /* flags */
|
|
};
|
|
"""
|
|
|
|
version_min_command_fields = segment_base_fields + [
|
|
("version", ctypes.c_uint32),
|
|
("sdk", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct version_min_command {
|
|
uint32_t cmd; /* LC_VERSION_MIN_MACOSX or
|
|
LC_VERSION_MIN_IPHONEOS or
|
|
LC_VERSION_MIN_WATCHOS or
|
|
LC_VERSION_MIN_TVOS */
|
|
uint32_t cmdsize; /* sizeof(struct min_version_command) */
|
|
uint32_t version; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
|
|
uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
|
|
};
|
|
"""
|
|
|
|
build_version_command_fields = segment_base_fields + [
|
|
("platform", ctypes.c_uint32),
|
|
("minos", ctypes.c_uint32),
|
|
("sdk", ctypes.c_uint32),
|
|
("ntools", ctypes.c_uint32),
|
|
]
|
|
"""
|
|
struct build_version_command {
|
|
uint32_t cmd; /* LC_BUILD_VERSION */
|
|
uint32_t cmdsize; /* sizeof(struct build_version_command) plus */
|
|
/* ntools * sizeof(struct build_tool_version) */
|
|
uint32_t platform; /* platform */
|
|
uint32_t minos; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
|
|
uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
|
|
uint32_t ntools; /* number of tool entries following this */
|
|
};
|
|
"""
|
|
|
|
|
|
def swap32(x):
|
|
return (
|
|
((x << 24) & 0xFF000000)
|
|
| ((x << 8) & 0x00FF0000)
|
|
| ((x >> 8) & 0x0000FF00)
|
|
| ((x >> 24) & 0x000000FF)
|
|
)
|
|
|
|
|
|
def get_base_class_and_magic_number(lib_file, seek=None):
|
|
if seek is None:
|
|
seek = lib_file.tell()
|
|
else:
|
|
lib_file.seek(seek)
|
|
magic_number = ctypes.c_uint32.from_buffer_copy(
|
|
lib_file.read(ctypes.sizeof(ctypes.c_uint32))
|
|
).value
|
|
|
|
# Handle wrong byte order
|
|
if magic_number in [FAT_CIGAM, FAT_CIGAM_64, MH_CIGAM, MH_CIGAM_64]:
|
|
if sys.byteorder == "little":
|
|
BaseClass = ctypes.BigEndianStructure
|
|
else:
|
|
BaseClass = ctypes.LittleEndianStructure
|
|
|
|
magic_number = swap32(magic_number)
|
|
else:
|
|
BaseClass = ctypes.Structure
|
|
|
|
lib_file.seek(seek)
|
|
return BaseClass, magic_number
|
|
|
|
|
|
def read_data(struct_class, lib_file):
|
|
return struct_class.from_buffer_copy(lib_file.read(ctypes.sizeof(struct_class)))
|
|
|
|
|
|
def extract_macosx_min_system_version(path_to_lib):
|
|
with open(path_to_lib, "rb") as lib_file:
|
|
BaseClass, magic_number = get_base_class_and_magic_number(lib_file, 0)
|
|
if magic_number not in [FAT_MAGIC, FAT_MAGIC_64, MH_MAGIC, MH_MAGIC_64]:
|
|
return
|
|
|
|
if magic_number in [FAT_MAGIC, FAT_CIGAM_64]:
|
|
|
|
class FatHeader(BaseClass):
|
|
_fields_ = fat_header_fields
|
|
|
|
fat_header = read_data(FatHeader, lib_file)
|
|
if magic_number == FAT_MAGIC:
|
|
|
|
class FatArch(BaseClass):
|
|
_fields_ = fat_arch_fields
|
|
|
|
else:
|
|
|
|
class FatArch(BaseClass):
|
|
_fields_ = fat_arch_64_fields
|
|
|
|
fat_arch_list = [
|
|
read_data(FatArch, lib_file) for _ in range(fat_header.nfat_arch)
|
|
]
|
|
|
|
versions_list = []
|
|
for el in fat_arch_list:
|
|
try:
|
|
version = read_mach_header(lib_file, el.offset)
|
|
if version is not None:
|
|
if el.cputype == CPU_TYPE_ARM64 and len(fat_arch_list) != 1:
|
|
# Xcode will not set the deployment target below 11.0.0
|
|
# for the arm64 architecture. Ignore the arm64 deployment
|
|
# in fat binaries when the target is 11.0.0, that way
|
|
# the other architectures can select a lower deployment
|
|
# target.
|
|
# This is safe because there is no arm64 variant for
|
|
# macOS 10.15 or earlier.
|
|
if version == (11, 0, 0):
|
|
continue
|
|
versions_list.append(version)
|
|
except ValueError:
|
|
pass
|
|
|
|
if len(versions_list) > 0:
|
|
return max(versions_list)
|
|
else:
|
|
return None
|
|
|
|
else:
|
|
try:
|
|
return read_mach_header(lib_file, 0)
|
|
except ValueError:
|
|
"""when some error during read library files"""
|
|
return None
|
|
|
|
|
|
def read_mach_header(lib_file, seek=None):
|
|
"""
|
|
This funcition parse mach-O header and extract
|
|
information about minimal system version
|
|
|
|
:param lib_file: reference to opened library file with pointer
|
|
"""
|
|
if seek is not None:
|
|
lib_file.seek(seek)
|
|
base_class, magic_number = get_base_class_and_magic_number(lib_file)
|
|
arch = "32" if magic_number == MH_MAGIC else "64"
|
|
|
|
class SegmentBase(base_class):
|
|
_fields_ = segment_base_fields
|
|
|
|
if arch == "32":
|
|
|
|
class MachHeader(base_class):
|
|
_fields_ = mach_header_fields
|
|
|
|
else:
|
|
|
|
class MachHeader(base_class):
|
|
_fields_ = mach_header_fields_64
|
|
|
|
mach_header = read_data(MachHeader, lib_file)
|
|
for _i in range(mach_header.ncmds):
|
|
pos = lib_file.tell()
|
|
segment_base = read_data(SegmentBase, lib_file)
|
|
lib_file.seek(pos)
|
|
if segment_base.cmd == LC_VERSION_MIN_MACOSX:
|
|
|
|
class VersionMinCommand(base_class):
|
|
_fields_ = version_min_command_fields
|
|
|
|
version_info = read_data(VersionMinCommand, lib_file)
|
|
return parse_version(version_info.version)
|
|
elif segment_base.cmd == LC_BUILD_VERSION:
|
|
|
|
class VersionBuild(base_class):
|
|
_fields_ = build_version_command_fields
|
|
|
|
version_info = read_data(VersionBuild, lib_file)
|
|
return parse_version(version_info.minos)
|
|
else:
|
|
lib_file.seek(pos + segment_base.cmdsize)
|
|
continue
|
|
|
|
|
|
def parse_version(version):
|
|
x = (version & 0xFFFF0000) >> 16
|
|
y = (version & 0x0000FF00) >> 8
|
|
z = version & 0x000000FF
|
|
return x, y, z
|
|
|
|
|
|
def calculate_macosx_platform_tag(archive_root, platform_tag):
|
|
"""
|
|
Calculate proper macosx platform tag basing on files which are included to wheel
|
|
|
|
Example platform tag `macosx-10.14-x86_64`
|
|
"""
|
|
prefix, base_version, suffix = platform_tag.split("-")
|
|
base_version = tuple(int(x) for x in base_version.split("."))
|
|
base_version = base_version[:2]
|
|
if base_version[0] > 10:
|
|
base_version = (base_version[0], 0)
|
|
assert len(base_version) == 2
|
|
if "MACOSX_DEPLOYMENT_TARGET" in os.environ:
|
|
deploy_target = tuple(
|
|
int(x) for x in os.environ["MACOSX_DEPLOYMENT_TARGET"].split(".")
|
|
)
|
|
deploy_target = deploy_target[:2]
|
|
if deploy_target[0] > 10:
|
|
deploy_target = (deploy_target[0], 0)
|
|
if deploy_target < base_version:
|
|
sys.stderr.write(
|
|
"[WARNING] MACOSX_DEPLOYMENT_TARGET is set to a lower value ({}) than "
|
|
"the version on which the Python interpreter was compiled ({}), and "
|
|
"will be ignored.\n".format(
|
|
".".join(str(x) for x in deploy_target),
|
|
".".join(str(x) for x in base_version),
|
|
)
|
|
)
|
|
else:
|
|
base_version = deploy_target
|
|
|
|
assert len(base_version) == 2
|
|
start_version = base_version
|
|
versions_dict = {}
|
|
for dirpath, _dirnames, filenames in os.walk(archive_root):
|
|
for filename in filenames:
|
|
if filename.endswith(".dylib") or filename.endswith(".so"):
|
|
lib_path = os.path.join(dirpath, filename)
|
|
min_ver = extract_macosx_min_system_version(lib_path)
|
|
if min_ver is not None:
|
|
min_ver = min_ver[0:2]
|
|
if min_ver[0] > 10:
|
|
min_ver = (min_ver[0], 0)
|
|
versions_dict[lib_path] = min_ver
|
|
|
|
if len(versions_dict) > 0:
|
|
base_version = max(base_version, max(versions_dict.values()))
|
|
|
|
# macosx platform tag do not support minor bugfix release
|
|
fin_base_version = "_".join([str(x) for x in base_version])
|
|
if start_version < base_version:
|
|
problematic_files = [k for k, v in versions_dict.items() if v > start_version]
|
|
problematic_files = "\n".join(problematic_files)
|
|
if len(problematic_files) == 1:
|
|
files_form = "this file"
|
|
else:
|
|
files_form = "these files"
|
|
error_message = (
|
|
"[WARNING] This wheel needs a higher macOS version than {} "
|
|
"To silence this warning, set MACOSX_DEPLOYMENT_TARGET to at least "
|
|
+ fin_base_version
|
|
+ " or recreate "
|
|
+ files_form
|
|
+ " with lower "
|
|
"MACOSX_DEPLOYMENT_TARGET: \n" + problematic_files
|
|
)
|
|
|
|
if "MACOSX_DEPLOYMENT_TARGET" in os.environ:
|
|
error_message = error_message.format(
|
|
"is set in MACOSX_DEPLOYMENT_TARGET variable."
|
|
)
|
|
else:
|
|
error_message = error_message.format(
|
|
"the version your Python interpreter is compiled against."
|
|
)
|
|
|
|
sys.stderr.write(error_message)
|
|
|
|
platform_tag = prefix + "_" + fin_base_version + "_" + suffix
|
|
return platform_tag
|