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elf: port more linker tests

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This commit is contained in:
Jakub Konka 2023-10-07 10:47:44 +02:00
parent 149dd82d54
commit c940735c4d
1 changed files with 115 additions and 25 deletions
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140
test/link/elf.zig
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@ -31,6 +31,7 @@ pub fn build(b: *Build) void {
// elf_step.dependOn(testLinkingZig(b, .{ .use_llvm = false }));
// Exercise linker with LLVM backend
elf_step.dependOn(testAbsSymbols(b, .{ .target = musl_target }));
elf_step.dependOn(testCommonSymbols(b, .{ .target = musl_target }));
elf_step.dependOn(testCommonSymbolsInArchive(b, .{ .target = musl_target }));
elf_step.dependOn(testEmptyObject(b, .{ .target = musl_target }));
@ -41,6 +42,7 @@ pub fn build(b: *Build) void {
elf_step.dependOn(testTlsStatic(b, .{ .target = musl_target }));
elf_step.dependOn(testAsNeeded(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testCanonicalPlt(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testDsoPlt(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testDsoUndef(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testLargeAlignmentDso(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
@ -50,6 +52,46 @@ pub fn build(b: *Build) void {
}
}
fn testAbsSymbols(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "abs-symbols", opts);
const obj = addObject(b, "obj", opts);
addAsmSourceBytes(obj,
\\.globl foo
\\foo = 0x800008
);
const exe = addExecutable(b, "test", opts);
addCSourceBytes(exe,
\\#include <signal.h>
\\#include <stdio.h>
\\#include <stdlib.h>
\\#include <ucontext.h>
\\#include <assert.h>
\\void handler(int signum, siginfo_t *info, void *ptr) {
\\ assert((size_t)info->si_addr == 0x800008);
\\ exit(0);
\\}
\\extern int foo;
\\int main() {
\\ struct sigaction act;
\\ act.sa_flags = SA_SIGINFO | SA_RESETHAND;
\\ act.sa_sigaction = handler;
\\ sigemptyset(&act.sa_mask);
\\ sigaction(SIGSEGV, &act, 0);
\\ foo = 5;
\\ return 0;
\\}
, &.{});
exe.addObject(obj);
exe.linkLibC();
const run = addRunArtifact(exe);
test_step.dependOn(&run.step);
return test_step;
}
fn testAsNeeded(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "as-needed", opts);
@ -62,7 +104,7 @@ fn testAsNeeded(b: *Build, opts: Options) *Step {
\\ return 0;
\\}
, &.{});
main_o.is_linking_libc = true;
main_o.linkLibC();
const libfoo = addSharedLibrary(b, "foo", opts);
addCSourceBytes(libfoo, "int foo() { return 42; }", &.{"-fPIC"});
@ -88,7 +130,7 @@ fn testAsNeeded(b: *Build, opts: Options) *Step {
exe.linkSystemLibrary2("baz", .{ .needed = true });
exe.addLibraryPath(libbaz.getEmittedBinDirectory());
exe.addRPath(libbaz.getEmittedBinDirectory());
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("42\n");
@ -114,7 +156,7 @@ fn testAsNeeded(b: *Build, opts: Options) *Step {
exe.linkSystemLibrary2("baz", .{ .needed = false });
exe.addLibraryPath(libbaz.getEmittedBinDirectory());
exe.addRPath(libbaz.getEmittedBinDirectory());
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("42\n");
@ -132,6 +174,54 @@ fn testAsNeeded(b: *Build, opts: Options) *Step {
return test_step;
}
fn testCanonicalPlt(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "canonical-plt", opts);
const dso = addSharedLibrary(b, "a", opts);
addCSourceBytes(dso,
\\void *foo() {
\\ return foo;
\\}
\\void *bar() {
\\ return bar;
\\}
, &.{"-fPIC"});
const b_o = addObject(b, "obj", opts);
addCSourceBytes(b_o,
\\void *bar();
\\void *baz() {
\\ return bar;
\\}
, &.{"-fPIC"});
const main_o = addObject(b, "main", opts);
addCSourceBytes(main_o,
\\#include <assert.h>
\\void *foo();
\\void *bar();
\\void *baz();
\\int main() {
\\ assert(foo == foo());
\\ assert(bar == bar());
\\ assert(bar == baz());
\\}
, &.{"-fno-PIC"});
main_o.linkLibC();
const exe = addExecutable(b, "main", opts);
exe.addObject(main_o);
exe.addObject(b_o);
exe.linkLibrary(dso);
exe.linkLibC();
exe.pie = false;
const run = addRunArtifact(exe);
test_step.dependOn(&run.step);
return test_step;
}
fn testCommonSymbols(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "common-symbols", opts);
@ -150,7 +240,7 @@ fn testCommonSymbols(b: *Build, opts: Options) *Step {
\\ printf("%d %d %d\n", foo, bar, baz);
\\}
, &.{"-fcommon"});
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("0 5 42\n");
@ -173,7 +263,7 @@ fn testCommonSymbolsInArchive(b: *Build, opts: Options) *Step {
\\ printf("%d %d %d %d\n", foo, bar, baz, two ? two() : -1);
\\}
, &.{"-fcommon"});
a_o.is_linking_libc = true;
a_o.linkLibC();
const b_o = addObject(b, "b", opts);
addCSourceBytes(b_o, "int foo = 5;", &.{"-fcommon"});
@ -196,7 +286,7 @@ fn testCommonSymbolsInArchive(b: *Build, opts: Options) *Step {
const exe = addExecutable(b, "test", opts);
exe.addObject(a_o);
exe.linkLibrary(lib);
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("5 0 0 -1\n");
@ -218,7 +308,7 @@ fn testCommonSymbolsInArchive(b: *Build, opts: Options) *Step {
const exe = addExecutable(b, "test", opts);
exe.addObject(a_o);
exe.linkLibrary(lib);
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("5 0 7 2\n");
@ -245,7 +335,7 @@ fn testDsoPlt(b: *Build, opts: Options) *Step {
\\ real_hello();
\\}
, &.{"-fPIC"});
dso.is_linking_libc = true;
dso.linkLibC();
const exe = addExecutable(b, "test", opts);
addCSourceBytes(exe,
@ -259,7 +349,7 @@ fn testDsoPlt(b: *Build, opts: Options) *Step {
\\}
, &.{});
exe.linkLibrary(dso);
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("Hello WORLD\n");
@ -277,7 +367,7 @@ fn testDsoUndef(b: *Build, opts: Options) *Step {
\\int bar = 5;
\\int baz() { return foo; }
, &.{"-fPIC"});
dso.is_linking_libc = true;
dso.linkLibC();
const obj = addObject(b, "obj", opts);
addCSourceBytes(obj, "int foo = 3;", &.{});
@ -294,7 +384,7 @@ fn testDsoUndef(b: *Build, opts: Options) *Step {
\\ return bar - 5;
\\}
, &.{});
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectExitCode(0);
@ -314,7 +404,7 @@ fn testEmptyObject(b: *Build, opts: Options) *Step {
const exe = addExecutable(b, "test", opts);
addCSourceBytes(exe, "int main() { return 0; }", &.{});
addCSourceBytes(exe, "", &.{});
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectExitCode(0);
@ -345,15 +435,15 @@ fn testGcSections(b: *Build, opts: Options) *Step {
, &.{});
obj.link_function_sections = true;
obj.link_data_sections = true;
obj.is_linking_libc = true;
obj.is_linking_libcpp = true;
obj.linkLibC();
obj.linkLibCpp();
{
const exe = addExecutable(b, "test", opts);
exe.addObject(obj);
exe.link_gc_sections = false;
exe.is_linking_libc = true;
exe.is_linking_libcpp = true;
exe.linkLibC();
exe.linkLibCpp();
const run = addRunArtifact(exe);
run.expectStdOutEqual("1 2\n");
@ -383,8 +473,8 @@ fn testGcSections(b: *Build, opts: Options) *Step {
const exe = addExecutable(b, "test", opts);
exe.addObject(obj);
exe.link_gc_sections = true;
exe.is_linking_libc = true;
exe.is_linking_libcpp = true;
exe.linkLibC();
exe.linkLibCpp();
const run = addRunArtifact(exe);
run.expectStdOutEqual("1 2\n");
@ -434,7 +524,7 @@ fn testLargeAlignmentDso(b: *Build, opts: Options) *Step {
\\}
, &.{"-fPIC"});
dso.link_function_sections = true;
dso.is_linking_libc = true;
dso.linkLibC();
const check = dso.checkObject();
check.checkInSymtab();
@ -451,7 +541,7 @@ fn testLargeAlignmentDso(b: *Build, opts: Options) *Step {
\\int main() { greet(); }
, &.{});
exe.linkLibrary(dso);
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("Hello world");
@ -485,7 +575,7 @@ fn testLargeAlignmentExe(b: *Build, opts: Options) *Step {
\\}
, &.{});
exe.link_function_sections = true;
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("Hello world");
@ -514,7 +604,7 @@ fn testLinkingC(b: *Build, opts: Options) *Step {
\\ return 0;
\\}
, &.{});
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("Hello World!\n");
@ -543,8 +633,8 @@ fn testLinkingCpp(b: *Build, opts: Options) *Step {
\\ return 0;
\\}
, &.{});
exe.is_linking_libc = true;
exe.is_linking_libcpp = true;
exe.linkLibC();
exe.linkLibCpp();
const run = addRunArtifact(exe);
run.expectStdOutEqual("Hello World!\n");
@ -606,7 +696,7 @@ fn testTlsStatic(b: *Build, opts: Options) *Step {
\\ return 0;
\\}
, &.{});
exe.is_linking_libc = true;
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual(