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elf: test various copyrel edge cases

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This commit is contained in:
Jakub Konka 2023-10-07 21:28:30 +02:00
parent b6006df565
commit 9861a9ea75
1 changed files with 149 additions and 0 deletions
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149
test/link/elf.zig
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@ -43,6 +43,9 @@ pub fn build(b: *Build) void {
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(testCopyrel(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testCopyrelAlias(b, .{ .target = glibc_target, .dynamic_linker = dynamic_linker }));
elf_step.dependOn(testCopyrelAlignment(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 }));
@ -320,6 +323,152 @@ fn testCommonSymbolsInArchive(b: *Build, opts: Options) *Step {
return test_step;
}
fn testCopyrel(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "copyrel", opts);
const dso = addSharedLibrary(b, "a", opts);
addCSourceBytes(dso,
\\int foo = 3;
\\int bar = 5;
, &.{"-fPIC"});
const exe = addExecutable(b, "main", opts);
addCSourceBytes(exe,
\\#include<stdio.h>
\\extern int foo, bar;
\\int main() {
\\ printf("%d %d\n", foo, bar);
\\ return 0;
\\}
, &.{});
exe.linkLibrary(dso);
exe.linkLibC();
const run = addRunArtifact(exe);
run.expectStdOutEqual("3 5\n");
test_step.dependOn(&run.step);
return test_step;
}
fn testCopyrelAlias(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "copyrel-alias", opts);
const dso = addSharedLibrary(b, "a", opts);
addCSourceBytes(dso,
\\int bruh = 31;
\\int foo = 42;
\\extern int bar __attribute__((alias("foo")));
\\extern int baz __attribute__((alias("foo")));
, &.{"-fPIC"});
const exe = addExecutable(b, "main", opts);
addCSourceBytes(exe,
\\#include<stdio.h>
\\extern int foo;
\\extern int *get_bar();
\\int main() {
\\ printf("%d %d %d\n", foo, *get_bar(), &foo == get_bar());
\\ return 0;
\\}
, &.{"-fno-PIC"});
addCSourceBytes(exe,
\\extern int bar;
\\int *get_bar() { return &bar; }
, &.{"-fno-PIC"});
exe.linkLibrary(dso);
exe.linkLibC();
exe.pie = false;
const run = addRunArtifact(exe);
run.expectStdOutEqual("42 42 1\n");
test_step.dependOn(&run.step);
return test_step;
}
fn testCopyrelAlignment(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "copyrel-alignment", opts);
const a_so = addSharedLibrary(b, "a", opts);
addCSourceBytes(a_so, "__attribute__((aligned(32))) int foo = 5;", &.{"-fPIC"});
const b_so = addSharedLibrary(b, "b", opts);
addCSourceBytes(b_so, "__attribute__((aligned(8))) int foo = 5;", &.{"-fPIC"});
const c_so = addSharedLibrary(b, "c", opts);
addCSourceBytes(c_so, "__attribute__((aligned(256))) int foo = 5;", &.{"-fPIC"});
const obj = addObject(b, "main", opts);
addCSourceBytes(obj,
\\#include <stdio.h>
\\extern int foo;
\\int main() { printf("%d\n", foo); }
, &.{"-fno-PIE"});
obj.linkLibC();
const exp_stdout = "5\n";
{
const exe = addExecutable(b, "main", opts);
exe.addObject(obj);
exe.linkLibrary(a_so);
exe.linkLibC();
exe.pie = false;
const run = addRunArtifact(exe);
run.expectStdOutEqual(exp_stdout);
test_step.dependOn(&run.step);
const check = exe.checkObject();
check.checkStart();
check.checkExact("section headers");
check.checkExact("name .copyrel");
check.checkExact("addralign 20");
test_step.dependOn(&check.step);
}
{
const exe = addExecutable(b, "main", opts);
exe.addObject(obj);
exe.linkLibrary(b_so);
exe.linkLibC();
exe.pie = false;
const run = addRunArtifact(exe);
run.expectStdOutEqual(exp_stdout);
test_step.dependOn(&run.step);
const check = exe.checkObject();
check.checkStart();
check.checkExact("section headers");
check.checkExact("name .copyrel");
check.checkExact("addralign 8");
test_step.dependOn(&check.step);
}
{
const exe = addExecutable(b, "main", opts);
exe.addObject(obj);
exe.linkLibrary(c_so);
exe.linkLibC();
exe.pie = false;
const run = addRunArtifact(exe);
run.expectStdOutEqual(exp_stdout);
test_step.dependOn(&run.step);
const check = exe.checkObject();
check.checkStart();
check.checkExact("section headers");
check.checkExact("name .copyrel");
check.checkExact("addralign 100");
test_step.dependOn(&check.step);
}
return test_step;
}
fn testDsoPlt(b: *Build, opts: Options) *Step {
const test_step = addTestStep(b, "dso-plt", opts);