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| 1 | +#![cfg(all(feature = "netcore3_0", feature = "utils", unix))] |
| 2 | +// see https://github.com/OpenByteDev/netcorehost/issues/38 |
| 3 | + |
| 4 | +#[path = "common.rs"] |
| 5 | +mod common; |
| 6 | + |
| 7 | +use netcorehost::{nethost, pdcstr, utils::altstack::{self, State}}; |
| 8 | +use rusty_fork::{ChildWrapper, ExitStatusWrapper, fork, rusty_fork_id}; |
| 9 | +use std::{process::Stdio, io::Read}; |
| 10 | + |
| 11 | +macro_rules! function_name { |
| 12 | + () => {{ |
| 13 | + fn f() {} |
| 14 | + fn type_name_of<T>(_: T) -> &'static str { |
| 15 | + std::any::type_name::<T>() |
| 16 | + } |
| 17 | + type_name_of(f) |
| 18 | + .rsplit("::") |
| 19 | + .find(|&part| part != "f" && part != "{{closure}}") |
| 20 | + .expect("faled to get function name") |
| 21 | + }}; |
| 22 | +} |
| 23 | + |
| 24 | +macro_rules! assert_contains { |
| 25 | + ($string:expr, $substring:expr $(,)?) => {{ |
| 26 | + let string_ref: &str = &$string; |
| 27 | + let substring_ref: &str = &$substring; |
| 28 | + assert!( |
| 29 | + string_ref.contains(substring_ref), |
| 30 | + "Expected `{}` to contain `{}`", |
| 31 | + string_ref, |
| 32 | + substring_ref |
| 33 | + ); |
| 34 | + }}; |
| 35 | +} |
| 36 | + |
| 37 | +macro_rules! assert_not_contains { |
| 38 | + ($string:expr, $substring:expr $(,)?) => {{ |
| 39 | + let string_ref: &str = &$string; |
| 40 | + let substring_ref: &str = &$substring; |
| 41 | + assert!( |
| 42 | + !string_ref.contains(substring_ref), |
| 43 | + "Expected `{}` NOT to contain `{}`", |
| 44 | + string_ref, |
| 45 | + substring_ref |
| 46 | + ); |
| 47 | + }}; |
| 48 | +} |
| 49 | + |
| 50 | +const MANAGED_HANDLER_OUTPUT: &str = "Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object."; |
| 51 | + |
| 52 | +#[test] |
| 53 | +fn segfault_with_small_altstack() { |
| 54 | + common::setup(); |
| 55 | + altstack_test( |
| 56 | + function_name!(), |
| 57 | + || { |
| 58 | + altstack::set(State::Enabled { size: 2 * 1024 }).unwrap(); |
| 59 | + }, |
| 60 | + |status, _, stderr| { |
| 61 | + assert_eq!(status.unix_signal(), Some(libc::SIGSEGV)); |
| 62 | + assert_not_contains!(stderr, MANAGED_HANDLER_OUTPUT); |
| 63 | + } |
| 64 | + ); |
| 65 | +} |
| 66 | + |
| 67 | +#[test] |
| 68 | +fn no_segfault_with_large_altstack() { |
| 69 | + common::setup(); |
| 70 | + altstack_test( |
| 71 | + function_name!(), |
| 72 | + || { |
| 73 | + altstack::set(State::Enabled { size: 16 * 1024 }).unwrap(); |
| 74 | + }, |
| 75 | + |status, _, stderr| { |
| 76 | + assert_ne!(status.unix_signal(), Some(libc::SIGSEGV)); |
| 77 | + assert_contains!(stderr, MANAGED_HANDLER_OUTPUT); |
| 78 | + } |
| 79 | + ); |
| 80 | +} |
| 81 | + |
| 82 | +#[test] |
| 83 | +fn no_segfault_with_altstack_disabled() { |
| 84 | + common::setup(); |
| 85 | + altstack_test( |
| 86 | + function_name!(), |
| 87 | + || { |
| 88 | + altstack::set(State::Disabled).unwrap(); |
| 89 | + }, |
| 90 | + |status, _, stderr| { |
| 91 | + assert_ne!(status.unix_signal(), Some(libc::SIGSEGV)); |
| 92 | + assert_contains!(stderr, MANAGED_HANDLER_OUTPUT); |
| 93 | + } |
| 94 | + ); |
| 95 | +} |
| 96 | + |
| 97 | +fn altstack_test( |
| 98 | + test_name: &str, |
| 99 | + configure_altstack: impl FnOnce(), |
| 100 | + verify: impl FnOnce(ExitStatusWrapper, /* stdout */ String, /* stderr */String) |
| 101 | +) { |
| 102 | + common::setup(); |
| 103 | + |
| 104 | + let body = || { |
| 105 | + configure_altstack(); |
| 106 | + |
| 107 | + let hostfxr = nethost::load_hostfxr().unwrap(); |
| 108 | + |
| 109 | + let context = hostfxr |
| 110 | + .initialize_for_runtime_config(common::test_runtime_config_path()) |
| 111 | + .unwrap(); |
| 112 | + let fn_loader = context |
| 113 | + .get_delegate_loader_for_assembly(common::test_dll_path()) |
| 114 | + .unwrap(); |
| 115 | + |
| 116 | + let throw_fn = fn_loader |
| 117 | + .get_function_with_unmanaged_callers_only::<unsafe fn()>( |
| 118 | + pdcstr!("Test.Program, Test"), |
| 119 | + pdcstr!("Throw"), |
| 120 | + ) |
| 121 | + .unwrap(); |
| 122 | + unsafe { throw_fn() }; |
| 123 | + }; |
| 124 | + |
| 125 | + fn configure_child(child: &mut std::process::Command) { |
| 126 | + child.stdout(Stdio::piped()); |
| 127 | + child.stderr(Stdio::piped()); |
| 128 | + } |
| 129 | + |
| 130 | + // Define how to supervise the child process |
| 131 | + let supervise = |child: &mut ChildWrapper, _file: &mut std::fs::File| { |
| 132 | + let mut stdout = String::new(); |
| 133 | + child |
| 134 | + .inner_mut() |
| 135 | + .stdout |
| 136 | + .as_mut() |
| 137 | + .unwrap() |
| 138 | + .read_to_string(&mut stdout) |
| 139 | + .unwrap(); |
| 140 | + |
| 141 | + let mut stderr = String::new(); |
| 142 | + child |
| 143 | + .inner_mut() |
| 144 | + .stderr |
| 145 | + .as_mut() |
| 146 | + .unwrap() |
| 147 | + .read_to_string(&mut stderr) |
| 148 | + .unwrap(); |
| 149 | + |
| 150 | + let status = child.wait().expect("unable to wait for child"); |
| 151 | + println!("status: {status}"); |
| 152 | + println!("stdout: {stdout}"); |
| 153 | + println!("stderr: {stderr}"); |
| 154 | + verify(status, stdout, stderr); |
| 155 | + }; |
| 156 | + |
| 157 | + // Run the test in a forked child |
| 158 | + fork( |
| 159 | + test_name, |
| 160 | + rusty_fork_id!(), |
| 161 | + configure_child, |
| 162 | + supervise, |
| 163 | + body, |
| 164 | + ).expect("fork failed"); |
| 165 | +} |
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