Auto merge of #126715 - Rejyr:migrate-readelf-rmake, r=<try>

Migrate `relro-levels`, `static-pie` to `rmake`

Part of #121876.

r? `@jieyouxu`

try-job: aarch64-gnu
try-job: arm-android
try-job: armhf-gnu
try-job: dist-i586-gnu-i586-i686-musl
try-job: dist-various-1
try-job: test-various

src/tools/run-make-support/src/command.rs

@@ -36,8 +36,10 @@ impl Command {
         Self { cmd: StdCommand::new(program), stdin: None, drop_bomb: DropBomb::arm(program) }
     }
 
-    pub fn set_stdin(&mut self, stdin: Box<[u8]>) {
-        self.stdin = Some(stdin);
+    /// Specify a stdin input
+    pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
+        self.stdin = Some(input.as_ref().to_vec().into_boxed_slice());
+        self
     }
 
     /// Specify an environment variable.

src/tools/run-make-support/src/llvm.rs

@@ -102,6 +102,24 @@ impl LlvmReadobj {
         self
     }
 
+    /// Pass `--program-headers` to display program headers.
+    pub fn program_headers(&mut self) -> &mut Self {
+        self.cmd.arg("--program-headers");
+        self
+    }
+
+    /// Pass `--symbols` to display the symbol.
+    pub fn symbols(&mut self) -> &mut Self {
+        self.cmd.arg("--symbols");
+        self
+    }
+
+    /// Pass `--dynamic-table` to display the dynamic symbol table.
+    pub fn dynamic_table(&mut self) -> &mut Self {
+        self.cmd.arg("--dynamic-table");
+        self
+    }
+
     /// Specify the section to display.
     pub fn section(&mut self, section: &str) -> &mut Self {
         self.cmd.arg("--string-dump");
@@ -153,7 +171,7 @@ impl LlvmFilecheck {
 
     /// Pipe a read file into standard input containing patterns that will be matched against the .patterns(path) call.
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }
 

src/tools/run-make-support/src/rustc.rs

@@ -244,7 +244,7 @@ impl Rustc {
 
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }
 

src/tools/run-make-support/src/rustdoc.rs

@@ -92,7 +92,7 @@ impl Rustdoc {
 
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }
 

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -151,7 +151,6 @@ run-make/raw-dylib-inline-cross-dylib/Makefile
 run-make/raw-dylib-link-ordinal/Makefile
 run-make/raw-dylib-stdcall-ordinal/Makefile
 run-make/redundant-libs/Makefile
-run-make/relro-levels/Makefile
 run-make/remap-path-prefix-dwarf/Makefile
 run-make/remap-path-prefix/Makefile
 run-make/reproducible-build-2/Makefile
@@ -177,7 +176,6 @@ run-make/split-debuginfo/Makefile
 run-make/stable-symbol-names/Makefile
 run-make/static-dylib-by-default/Makefile
 run-make/static-extern-type/Makefile
-run-make/static-pie/Makefile
 run-make/staticlib-blank-lib/Makefile
 run-make/staticlib-dylib-linkage/Makefile
 run-make/std-core-cycle/Makefile

tests/run-make/relro-levels/rmake.rs

@@ -0,0 +1,28 @@
+// This tests the different -Crelro-level values, and makes sure that they work properly.
+
+//@ only-linux
+
+use run_make_support::llvm_readobj;
+use run_make_support::rustc;
+
+fn compile(relro_level: &str) {
+    rustc().arg(format!("-Crelro-level={relro_level}")).input("hello.rs").run();
+}
+
+fn main() {
+    // Ensure that binaries built with the full relro level links them with both
+    // RELRO and BIND_NOW for doing eager symbol resolving.
+
+    compile("full");
+    llvm_readobj().program_headers().input("hello").run().assert_stdout_contains("GNU_RELRO");
+    llvm_readobj().dynamic_table().input("hello").run().assert_stdout_contains("BIND_NOW");
+
+    compile("partial");
+    llvm_readobj().program_headers().input("hello").run().assert_stdout_contains("GNU_RELRO");
+
+    // Ensure that we're *not* built with RELRO when setting it to off.  We do
+    // not want to check for BIND_NOW however, as the linker might have that
+    // enabled by default.
+    compile("off");
+    llvm_readobj().program_headers().input("hello").run().assert_stdout_not_contains("GNU_RELRO");
+}

tests/run-make/static-pie/rmake.rs

@@ -0,0 +1,73 @@
+// How to manually run this
+// $ ./x.py test --target x86_64-unknown-linux-[musl,gnu] tests/run-make/static-pie
+
+//@ only-x86_64
+//@ only-linux
+//@ ignore-32bit
+
+use std::process::Command;
+
+use run_make_support::llvm_readobj;
+use run_make_support::regex::Regex;
+use run_make_support::rustc;
+use run_make_support::{cmd, run_with_args, target};
+
+// Minimum major versions supporting -static-pie
+const GCC_VERSION: u32 = 8;
+const CLANG_VERSION: u32 = 9;
+
+// Return `true` if the `compiler` version supports `-static-pie`.
+fn ok_compiler_version(compiler: &str) -> bool {
+    let (trigger, version_threshold) = match compiler {
+        "clang" => ("__clang_major__", CLANG_VERSION),
+        "gcc" => ("__GNUC__", GCC_VERSION),
+        other => panic!("unexpected compiler '{other}', expected 'clang' or 'gcc'"),
+    };
+
+    if Command::new(compiler).spawn().is_err() {
+        eprintln!("No {compiler} version detected");
+        return false;
+    }
+
+    let compiler_output =
+        cmd(compiler).stdin(trigger).arg("-").arg("-E").arg("-x").arg("c").run().stdout_utf8();
+    let re = Regex::new(r"(?m)^(\d+)").unwrap();
+    let version: u32 =
+        re.captures(&compiler_output).unwrap().get(1).unwrap().as_str().parse().unwrap();
+
+    if version >= version_threshold {
+        eprintln!("{compiler} supports -static-pie");
+        true
+    } else {
+        eprintln!("{compiler} too old to support -static-pie, skipping test");
+        false
+    }
+}
+
+fn test(compiler: &str) {
+    if !ok_compiler_version(compiler) {
+        return;
+    }
+
+    rustc()
+        .input("test-aslr.rs")
+        .target(&target())
+        .linker(compiler)
+        .arg("-Clinker-flavor=gcc")
+        .arg("-Ctarget-feature=+crt-static")
+        .run();
+
+    llvm_readobj()
+        .symbols()
+        .input("test-aslr")
+        .run()
+        .assert_stdout_not_contains("INTERP")
+        .assert_stdout_contains("DYNAMIC");
+
+    run_with_args("test-aslr", &["--test-aslr"]);
+}
+
+fn main() {
+    test("clang");
+    test("gcc");
+}