Ensure assert_fail and abort have noreturn attribute

Cargo.lock

@@ -2,15 +2,6 @@
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+ "quote 1.0.23",
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+ "syn 1.0.109",
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@@ -62,9 +55,9 @@ dependencies = [
 
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+dependencies = [
+ "os_str_bytes",
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 [[package]]
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+ "libc",
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@@ -126,6 +149,18 @@ dependencies = [
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+
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@@ -144,11 +189,21 @@ dependencies = [
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 [[package]]
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 [[package]]
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+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "628bfdf232daa22b0d64fdb62b09fcc36bb01f05a3939e20ab73aaf9470d0463"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"

Cargo.toml

@@ -13,7 +13,7 @@ members = ["src/crt0", "src/crti", "src/crtn", "src/ld_so", "src/platform/redox/
 exclude = ["core_io", "ralloc", "tests"]
 
 [build-dependencies]
-cbindgen = "0.13.2"
+cbindgen = "0.24.3"
 cc = "1.0.25"
 
 [dependencies]

include/bits/stdlib.h

@@ -1,16 +1,14 @@
 #ifndef _BITS_STDLIB_H
 #define _BITS_STDLIB_H
 
-#ifdef __cplusplus
-extern "C" {
+// C++ needs abort to be a function, and cannot use this
+#ifndef __cplusplus
+// Override abort function with detailed abort in C
+#define abort() __abort(__func__, __FILE__, __LINE__)
 #endif
 
 #ifdef __cplusplus
-// C++ needs abort to be a function, define backup function
-void abort(void);
-#else
-// C uses detailed abort macro
-#define abort() __abort(__func__, __FILE__, __LINE__)
+extern "C" {
 #endif
 
 long double strtold(const char *nptr, char **endptr);

src/c/stack_chk.c

@@ -3,7 +3,7 @@
 uintptr_t __stack_chk_guard = 0xd048c37519fcadfe;
 
 // manually define detailed abort function
-void __abort(const char *func, const char *file, int line);
+void __abort(const char *func, const char *file, int line) __attribute__((noreturn));
 
 __attribute__((noreturn))
 void __stack_chk_fail(void) {

src/c/stdlib.c

@@ -3,12 +3,3 @@ double strtod(const char *nptr, char **endptr);
 long double strtold(const char *nptr, char **endptr) {
     return (long double)strtod(nptr, endptr);
 }
-
-// manually define detailed abort function
-void __abort(const char *func, const char *file, int line);
-
-// backup definition of abort for programs that link it directly
-void abort(void) {
-    // call detailed abort function
-    __abort(__func__, __FILE__, __LINE__);
-}

src/header/assert/cbindgen.toml

@@ -7,3 +7,6 @@ cpp_compat = true
 
 [enum]
 prefix_with_name = true
+
+[fn]
+no_return = "__attribute__((noreturn))"

src/header/assert/mod.rs

@@ -12,7 +12,7 @@ pub unsafe extern "C" fn __assert_fail(
     file: *const c_char,
     line: c_int,
     cond: *const c_char,
-) {
+) -> ! {
     let func = CStr::from_ptr(func).to_str().unwrap();
     let file = CStr::from_ptr(file).to_str().unwrap();
     let cond = CStr::from_ptr(cond).to_str().unwrap();

src/header/stdlib/cbindgen.toml

@@ -8,3 +8,6 @@ cpp_compat = true
 
 [enum]
 prefix_with_name = true
+
+[fn]
+no_return = "__attribute__((noreturn))"

src/header/stdlib/mod.rs

@@ -89,12 +89,19 @@ pub unsafe extern "C" fn a64l(s: *const c_char) -> c_long {
     c_long::from(l)
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn abort() -> ! {
+    eprintln!("Legacy Abort");
+
+    intrinsics::abort();
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn __abort(
     func: *const c_char,
     file: *const c_char,
     line: c_int,
-) {
+) -> ! {
     let func = CStr::from_ptr(func).to_str().unwrap();
     let file = CStr::from_ptr(file).to_str().unwrap();