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const std = @import("std");
const builtin = @import("builtin");
// To run executables linked against a specific glibc version, the
// run-time glibc version needs to be new enough. Check the host's glibc
// version. Note that this does not allow for translation/vm/emulation
// services to run these tests.
const running_glibc_ver = builtin.os.versionRange().gnuLibCVersion();
pub fn build(b: *std.Build) void {
const test_step = b.step("test", "Test");
b.default_step = test_step;
for ([_][]const u8{ "aarch64-linux-gnu.2.27", "aarch64-linux-gnu.2.34" }) |t| {
const exe = b.addExecutable(.{
.name = t,
.root_module = b.createModule(.{
.root_source_file = null,
.target = b.resolveTargetQuery(std.Target.Query.parse(
.{ .arch_os_abi = t },
) catch unreachable),
.link_libc = true,
}),
});
// We disable UBSAN for these tests as the libc being tested here is
// so old, it doesn't even support compiling our UBSAN implementation.
exe.bundle_ubsan_rt = false;
exe.root_module.sanitize_c = .off;
exe.root_module.addCSourceFile(.{ .file = b.path("main.c") });
// TODO: actually test the output
_ = exe.getEmittedBin();
test_step.dependOn(&exe.step);
}
// Build & run a C test case against a sampling of supported glibc versions
versions: for ([_][]const u8{
// "native-linux-gnu.2.0", // fails with a pile of missing symbols.
"native-linux-gnu.2.2.5",
"native-linux-gnu.2.4",
"native-linux-gnu.2.12",
"native-linux-gnu.2.16",
"native-linux-gnu.2.22",
"native-linux-gnu.2.28",
"native-linux-gnu.2.33",
"native-linux-gnu.2.38",
"native-linux-gnu",
}) |t| {
const target = b.resolveTargetQuery(std.Target.Query.parse(
.{ .arch_os_abi = t },
) catch unreachable);
const glibc_ver = target.result.os.version_range.linux.glibc;
// only build test if glibc version supports the architecture
for (std.zig.target.available_libcs) |libc| {
if (libc.arch != target.result.cpu.arch or
libc.os != target.result.os.tag or
libc.abi != target.result.abi)
continue;
if (libc.glibc_min) |min| {
if (glibc_ver.order(min) == .lt) continue :versions;
}
}
const exe = b.addExecutable(.{
.name = t,
.root_module = b.createModule(.{
.root_source_file = null,
.target = target,
.link_libc = true,
}),
});
// We disable UBSAN for these tests as the libc being tested here is
// so old, it doesn't even support compiling our UBSAN implementation.
exe.bundle_ubsan_rt = false;
exe.root_module.sanitize_c = .off;
exe.root_module.addCSourceFile(.{ .file = b.path("glibc_runtime_check.c") });
// Only try running the test if the host glibc is known to be good enough. Ideally, the Zig
// test runner would be able to check this, but see https://github.com/ziglang/zig/pull/17702#issuecomment-1831310453
if (running_glibc_ver) |running_ver| {
if (glibc_ver.order(running_ver) == .lt) {
const run_cmd = b.addRunArtifact(exe);
run_cmd.skip_foreign_checks = true;
run_cmd.expectExitCode(0);
test_step.dependOn(&run_cmd.step);
}
}
const check = exe.checkObject();
// __errno_location is always a dynamically linked symbol
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __errno_location");
// before v2.32 fstat redirects through __fxstat, afterwards its a
// normal dynamic symbol
check.checkInDynamicSymtab();
if (glibc_ver.order(.{ .major = 2, .minor = 32, .patch = 0 }) == .lt) {
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __fxstat");
check.checkInSymtab();
check.checkContains("FUNC LOCAL HIDDEN fstat");
} else {
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT fstat");
check.checkInSymtab();
check.checkNotPresent("__fxstat");
}
// before v2.26 reallocarray is not supported
check.checkInDynamicSymtab();
if (glibc_ver.order(.{ .major = 2, .minor = 26, .patch = 0 }) == .lt) {
check.checkNotPresent("reallocarray");
} else {
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT reallocarray");
}
// before v2.38 strlcpy is not supported
check.checkInDynamicSymtab();
if (glibc_ver.order(.{ .major = 2, .minor = 38, .patch = 0 }) == .lt) {
check.checkNotPresent("strlcpy");
} else {
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT strlcpy");
}
// v2.16 introduced getauxval()
check.checkInDynamicSymtab();
if (glibc_ver.order(.{ .major = 2, .minor = 16, .patch = 0 }) == .lt) {
check.checkNotPresent("getauxval");
} else {
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT getauxval");
}
// Always have dynamic "exit", "pow", and "powf" references
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT exit");
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT pow");
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT powf");
// An atexit local symbol is defined, and depends on undefined dynamic
// __cxa_atexit.
check.checkInSymtab();
check.checkContains("FUNC LOCAL HIDDEN atexit");
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __cxa_atexit");
test_step.dependOn(&check.step);
}
// Build & run a Zig test case against a sampling of supported glibc versions
versions: for ([_][]const u8{
"native-linux-gnu.2.17", // Currently oldest supported, see #17769
"native-linux-gnu.2.23",
"native-linux-gnu.2.28",
"native-linux-gnu.2.33",
"native-linux-gnu.2.38",
"native-linux-gnu",
}) |t| {
const target = b.resolveTargetQuery(std.Target.Query.parse(
.{ .arch_os_abi = t },
) catch unreachable);
const glibc_ver = target.result.os.version_range.linux.glibc;
// only build test if glibc version supports the architecture
for (std.zig.target.available_libcs) |libc| {
if (libc.arch != target.result.cpu.arch or
libc.os != target.result.os.tag or
libc.abi != target.result.abi)
continue;
if (libc.glibc_min) |min| {
if (glibc_ver.order(min) == .lt) continue :versions;
}
}
const exe = b.addExecutable(.{
.name = t,
.root_module = b.createModule(.{
.root_source_file = b.path("glibc_runtime_check.zig"),
.target = target,
.link_libc = true,
}),
});
// We disable UBSAN for these tests as the libc being tested here is
// so old, it doesn't even support compiling our UBSAN implementation.
exe.bundle_ubsan_rt = false;
exe.root_module.sanitize_c = .off;
// Only try running the test if the host glibc is known to be good enough. Ideally, the Zig
// test runner would be able to check this, but see https://github.com/ziglang/zig/pull/17702#issuecomment-1831310453
if (running_glibc_ver) |running_ver| {
if (glibc_ver.order(running_ver) == .lt) {
const run_cmd = b.addRunArtifact(exe);
run_cmd.skip_foreign_checks = true;
run_cmd.expectExitCode(0);
test_step.dependOn(&run_cmd.step);
}
}
const check = exe.checkObject();
// __errno_location is always a dynamically linked symbol
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __errno_location");
// before v2.32 fstatat redirects through __fxstatat, afterwards its a
// normal dynamic symbol
if (glibc_ver.order(.{ .major = 2, .minor = 32, .patch = 0 }) == .lt) {
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __fxstatat");
check.checkInSymtab();
check.checkContains("FUNC LOCAL HIDDEN fstatat");
} else {
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT fstatat");
check.checkInSymtab();
check.checkNotPresent("FUNC LOCAL HIDDEN fstatat");
}
// before v2.26 reallocarray is not supported
if (glibc_ver.order(.{ .major = 2, .minor = 26, .patch = 0 }) == .lt) {
check.checkInDynamicSymtab();
check.checkNotPresent("reallocarray");
} else {
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT reallocarray");
}
// before v2.38 strlcpy is not supported
if (glibc_ver.order(.{ .major = 2, .minor = 38, .patch = 0 }) == .lt) {
check.checkInDynamicSymtab();
check.checkNotPresent("strlcpy");
} else {
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT strlcpy");
}
// v2.16 introduced getauxval(), so always present
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT getauxval");
// Always have a dynamic "exit" reference
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT exit");
// An atexit local symbol is defined, and depends on undefined dynamic
// __cxa_atexit.
check.checkInSymtab();
check.checkContains("FUNC LOCAL HIDDEN atexit");
check.checkInDynamicSymtab();
check.checkExact("0 0 UND FUNC GLOBAL DEFAULT __cxa_atexit");
test_step.dependOn(&check.step);
}
}
|
