sanitizers: Add support for stable sanitizers

Add suppport for specifying stable sanitizers in addition to the
existing supported sanitizers.

Author: rcvalle

compiler/rustc_codegen_llvm/src/abi.rs

@@ -16,7 +16,7 @@ use rustc_session::{Session, config};
 use rustc_target::callconv::{
     ArgAbi, ArgAttribute, ArgAttributes, ArgExtension, CastTarget, FnAbi, PassMode,
 };
-use rustc_target::spec::{Arch, SanitizerSet};
+use rustc_target::spec::Arch;
 use smallvec::SmallVec;
 
 use crate::attributes::{self, llfn_attrs_from_instance};
@@ -96,7 +96,7 @@ fn get_attrs<'ll>(this: &ArgAttributes, cx: &CodegenCx<'ll, '_>) -> SmallVec<[&'
                 }
             }
         }
-    } else if cx.tcx.sess.sanitizers().contains(SanitizerSet::MEMORY) {
+    } else if cx.tcx.sess.is_sanitizer_memory_enabled() {
         // If we're not optimising, *but* memory sanitizer is on, emit noundef, since it affects
         // memory sanitizer's behavior.
 

compiler/rustc_codegen_llvm/src/attributes.rs

@@ -260,7 +260,7 @@ fn probestack_attr<'ll, 'tcx>(cx: &SimpleCx<'ll>, tcx: TyCtxt<'tcx>) -> Option<&
     // Currently stack probes seem somewhat incompatible with the address
     // sanitizer and thread sanitizer. With asan we're already protected from
     // stack overflow anyway so we don't really need stack probes regardless.
-    if tcx.sess.sanitizers().intersects(SanitizerSet::ADDRESS | SanitizerSet::THREAD) {
+    if tcx.sess.is_sanitizer_address_enabled() || tcx.sess.is_sanitizer_thread_enabled() {
         return None;
     }
 

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -2494,7 +2494,7 @@ fn add_order_independent_options(
         && crate_type == CrateType::Executable
         && !matches!(flavor, LinkerFlavor::Gnu(Cc::Yes, _))
     {
-        let prefix = if sess.sanitizers().contains(SanitizerSet::ADDRESS) { "asan/" } else { "" };
+        let prefix = if sess.is_sanitizer_address_enabled() { "asan/" } else { "" };
         cmd.link_arg(format!("--dynamic-linker={prefix}ld.so.1"));
     }
 

compiler/rustc_interface/src/tests.rs

@@ -639,6 +639,7 @@ fn test_codegen_options_tracking_hash() {
     tracked!(profile_use, Some(PathBuf::from("abc")));
     tracked!(relocation_model, Some(RelocModel::Pic));
     tracked!(relro_level, Some(RelroLevel::Full));
+    tracked!(sanitize, SanitizerSet::ADDRESS);
     tracked!(soft_float, true);
     tracked!(split_debuginfo, Some(SplitDebuginfo::Packed));
     tracked!(symbol_mangling_version, Some(SymbolManglingVersion::V0));
@@ -858,7 +859,6 @@ fn test_unstable_options_tracking_hash() {
     tracked!(regparm, Some(3));
     tracked!(relax_elf_relocations, Some(true));
     tracked!(remap_cwd_prefix, Some(PathBuf::from("abc")));
-    tracked!(sanitizer, SanitizerSet::ADDRESS);
     tracked!(sanitizer_cfi_canonical_jump_tables, None);
     tracked!(sanitizer_cfi_generalize_pointers, Some(true));
     tracked!(sanitizer_cfi_normalize_integers, Some(true));

compiler/rustc_session/messages.ftl

@@ -9,7 +9,7 @@ session_branch_protection_requires_aarch64 = `-Zbranch-protection` is only suppo
 
 session_cannot_enable_crt_static_linux = sanitizer is incompatible with statically linked libc, disable it using `-C target-feature=-crt-static`
 
-session_cannot_mix_and_match_sanitizers = `-Zsanitizer={$first}` is incompatible with `-Zsanitizer={$second}`
+session_cannot_mix_and_match_sanitizers = `-Csanitize={$first}` is incompatible with `-Csanitize={$second}`
 
 session_cli_feature_diagnostic_help =
     add `-Zcrate-attr="feature({$feature})"` to the command-line options to enable
@@ -92,15 +92,15 @@ session_profile_sample_use_file_does_not_exist = file `{$path}` passed to `-C pr
 
 session_profile_use_file_does_not_exist = file `{$path}` passed to `-C profile-use` does not exist
 
-session_sanitizer_cfi_canonical_jump_tables_requires_cfi = `-Zsanitizer-cfi-canonical-jump-tables` requires `-Zsanitizer=cfi`
+session_sanitizer_cfi_canonical_jump_tables_requires_cfi = `-Zsanitizer-cfi-canonical-jump-tables` requires `-Csanitize=cfi`
 
-session_sanitizer_cfi_generalize_pointers_requires_cfi = `-Zsanitizer-cfi-generalize-pointers` requires `-Zsanitizer=cfi` or `-Zsanitizer=kcfi`
+session_sanitizer_cfi_generalize_pointers_requires_cfi = `-Zsanitizer-cfi-generalize-pointers` requires `-Csanitize=cfi` or `-Csanitize=kcfi`
 
-session_sanitizer_cfi_normalize_integers_requires_cfi = `-Zsanitizer-cfi-normalize-integers` requires `-Zsanitizer=cfi` or `-Zsanitizer=kcfi`
+session_sanitizer_cfi_normalize_integers_requires_cfi = `-Zsanitizer-cfi-normalize-integers` requires `-Csanitize=cfi` or `-Csanitize=kcfi`
 
-session_sanitizer_cfi_requires_lto = `-Zsanitizer=cfi` requires `-Clto` or `-Clinker-plugin-lto`
+session_sanitizer_cfi_requires_lto = `-Csanitize=cfi` requires `-Clto` or `-Clinker-plugin-lto`
 
-session_sanitizer_cfi_requires_single_codegen_unit = `-Zsanitizer=cfi` with `-Clto` requires `-Ccodegen-units=1`
+session_sanitizer_cfi_requires_single_codegen_unit = `-Csanitize=cfi` with `-Clto` requires `-Ccodegen-units=1`
 
 session_sanitizer_kcfi_arity_requires_kcfi = `-Zsanitizer-kcfi-arity` requires `-Zsanitizer=kcfi`
 

compiler/rustc_session/src/options.rs

@@ -136,18 +136,19 @@ impl TargetModifier {
     pub fn consistent(&self, sess: &Session, other: Option<&TargetModifier>) -> bool {
         assert!(other.is_none() || self.opt == other.unwrap().opt);
         match self.opt {
-            OptionsTargetModifiers::UnstableOptions(unstable) => match unstable {
-                UnstableOptionsTargetModifiers::sanitizer => {
+            OptionsTargetModifiers::CodegenOptions(stable) => match stable {
+                CodegenOptionsTargetModifiers::sanitize => {
                     return target_modifier_consistency_check::sanitizer(self, other);
                 }
+            },
+            OptionsTargetModifiers::UnstableOptions(unstable) => match unstable {
                 UnstableOptionsTargetModifiers::sanitizer_cfi_normalize_integers => {
                     return target_modifier_consistency_check::sanitizer_cfi_normalize_integers(
                         sess, self, other,
                     );
                 }
                 _ => {}
             },
-            _ => {}
         };
         match other {
             Some(other) => self.extend().tech_value == other.extend().tech_value,
@@ -1263,26 +1264,14 @@ pub mod parse {
     }
 
     pub(crate) fn parse_sanitizers(slot: &mut SanitizerSet, v: Option<&str>) -> bool {
-        if let Some(v) = v {
-            for s in v.split(',') {
-                *slot |= match s {
-                    "address" => SanitizerSet::ADDRESS,
-                    "cfi" => SanitizerSet::CFI,
-                    "dataflow" => SanitizerSet::DATAFLOW,
-                    "kcfi" => SanitizerSet::KCFI,
-                    "kernel-address" => SanitizerSet::KERNELADDRESS,
-                    "leak" => SanitizerSet::LEAK,
-                    "memory" => SanitizerSet::MEMORY,
-                    "memtag" => SanitizerSet::MEMTAG,
-                    "shadow-call-stack" => SanitizerSet::SHADOWCALLSTACK,
-                    "thread" => SanitizerSet::THREAD,
-                    "hwaddress" => SanitizerSet::HWADDRESS,
-                    "safestack" => SanitizerSet::SAFESTACK,
-                    "realtime" => SanitizerSet::REALTIME,
-                    _ => return false,
-                }
+        if let Some(s) = v {
+            let sanitizer_set = SanitizerSet::from_comma_list(s);
+            if sanitizer_set.is_ok() {
+                *slot |= sanitizer_set.unwrap();
+                true
+            } else {
+                false
             }
-            true
         } else {
             false
         }
@@ -2187,7 +2176,10 @@ options! {
     rpath: bool = (false, parse_bool, [UNTRACKED],
         "set rpath values in libs/exes (default: no)"),
     save_temps: bool = (false, parse_bool, [UNTRACKED],
-        "save all temporary output files during compilation (default: no)"),
+        "Allow incompatible target modifiers in dependency crates (comma separated list)"),
+    #[rustc_lint_opt_deny_field_access("use `Session::sanitizers()` instead of this field")]
+    sanitize: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED TARGET_MODIFIER],
+        "use one or multiple sanitizers"),
     soft_float: bool = (false, parse_bool, [TRACKED],
         "deprecated option: use soft float ABI (*eabihf targets only) (default: no)"),
     #[rustc_lint_opt_deny_field_access("use `Session::split_debuginfo` instead of this field")]
@@ -2604,9 +2596,6 @@ written to standard error output)"),
     retpoline_external_thunk: bool = (false, parse_bool, [TRACKED TARGET_MODIFIER],
         "enables retpoline-external-thunk, retpoline-indirect-branches and retpoline-indirect-calls \
         target features (default: no)"),
-    #[rustc_lint_opt_deny_field_access("use `Session::sanitizers()` instead of this field")]
-    sanitizer: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED TARGET_MODIFIER],
-        "use a sanitizer"),
     sanitizer_cfi_canonical_jump_tables: Option<bool> = (Some(true), parse_opt_bool, [TRACKED],
         "enable canonical jump tables (default: yes)"),
     sanitizer_cfi_generalize_pointers: Option<bool> = (None, parse_opt_bool, [TRACKED],

compiler/rustc_session/src/session.rs

@@ -307,6 +307,10 @@ impl Session {
         &self.opts.unstable_opts.coverage_options
     }
 
+    pub fn is_sanitizer_address_enabled(&self) -> bool {
+        self.sanitizers().contains(SanitizerSet::ADDRESS)
+    }
+
     pub fn is_sanitizer_cfi_enabled(&self) -> bool {
         self.sanitizers().contains(SanitizerSet::CFI)
     }
@@ -327,6 +331,10 @@ impl Session {
         self.opts.unstable_opts.sanitizer_cfi_normalize_integers == Some(true)
     }
 
+    pub fn is_sanitizer_hwaddress_enabled(&self) -> bool {
+        self.sanitizers().contains(SanitizerSet::HWADDRESS)
+    }
+
     pub fn is_sanitizer_kcfi_arity_enabled(&self) -> bool {
         self.opts.unstable_opts.sanitizer_kcfi_arity == Some(true)
     }
@@ -335,6 +343,26 @@ impl Session {
         self.sanitizers().contains(SanitizerSet::KCFI)
     }
 
+    pub fn is_sanitizer_kernel_address_enabled(&self) -> bool {
+        self.sanitizers().contains(SanitizerSet::KERNELADDRESS)
+    }
+
+    pub fn is_sanitizer_memory_enabled(&self) -> bool {
+        self.sanitizers().contains(SanitizerSet::MEMORY)
+    }
+
+    pub fn is_sanitizer_memory_recover_enabled(&self) -> bool {
+        self.opts.unstable_opts.sanitizer_recover.contains(SanitizerSet::MEMORY)
+    }
+
+    pub fn is_sanitizer_memory_track_origins_enabled(&self) -> bool {
+        self.opts.unstable_opts.sanitizer_memory_track_origins != 0
+    }
+
+    pub fn is_sanitizer_thread_enabled(&self) -> bool {
+        self.sanitizers().contains(SanitizerSet::THREAD)
+    }
+
     pub fn is_split_lto_unit_enabled(&self) -> bool {
         self.opts.unstable_opts.split_lto_unit == Some(true)
     }
@@ -512,7 +540,10 @@ impl Session {
         // AddressSanitizer and KernelAddressSanitizer uses lifetimes to detect use after scope bugs.
         // MemorySanitizer uses lifetimes to detect use of uninitialized stack variables.
         // HWAddressSanitizer will use lifetimes to detect use after scope bugs in the future.
-        || self.sanitizers().intersects(SanitizerSet::ADDRESS | SanitizerSet::KERNELADDRESS | SanitizerSet::MEMORY | SanitizerSet::HWADDRESS)
+        || self.is_sanitizer_address_enabled()
+        || self.is_sanitizer_kernel_address_enabled()
+        || self.is_sanitizer_memory_enabled()
+        || self.is_sanitizer_hwaddress_enabled()
     }
 
     pub fn diagnostic_width(&self) -> usize {
@@ -655,7 +686,7 @@ impl Session {
             let more_names = self.opts.output_types.contains_key(&OutputType::LlvmAssembly)
                 || self.opts.output_types.contains_key(&OutputType::Bitcode)
                 // AddressSanitizer and MemorySanitizer use alloca name when reporting an issue.
-                || self.opts.unstable_opts.sanitizer.intersects(SanitizerSet::ADDRESS | SanitizerSet::MEMORY);
+                || self.is_sanitizer_address_enabled() || self.is_sanitizer_memory_enabled();
             !more_names
         }
     }
@@ -901,7 +932,7 @@ impl Session {
     }
 
     pub fn sanitizers(&self) -> SanitizerSet {
-        return self.opts.unstable_opts.sanitizer | self.target.options.default_sanitizers;
+        return self.opts.cg.sanitize | self.target.options.default_sanitizers;
     }
 }
 
@@ -1169,14 +1200,19 @@ fn validate_commandline_args_with_session_available(sess: &Session) {
         }
     }
 
-    // Sanitizers can only be used on platforms that we know have working sanitizer codegen.
-    let supported_sanitizers = sess.target.options.supported_sanitizers;
-    let mut unsupported_sanitizers = sess.opts.unstable_opts.sanitizer - supported_sanitizers;
+    let supported_sanitizers = if sess.unstable_options() {
+        sess.target.options.supported_sanitizers | sess.target.options.stable_sanitizers
+    } else {
+        sess.target.options.stable_sanitizers
+    };
+    let mut unsupported_sanitizers = sess.sanitizers() - supported_sanitizers;
+
     // Niche: if `fixed-x18`, or effectively switching on `reserved-x18` flag, is enabled
     // we should allow Shadow Call Stack sanitizer.
     if sess.opts.unstable_opts.fixed_x18 && sess.target.arch == Arch::AArch64 {
         unsupported_sanitizers -= SanitizerSet::SHADOWCALLSTACK;
     }
+
     match unsupported_sanitizers.into_iter().count() {
         0 => {}
         1 => {
@@ -1191,18 +1227,15 @@ fn validate_commandline_args_with_session_available(sess: &Session) {
     }
 
     // Cannot mix and match mutually-exclusive sanitizers.
-    if let Some((first, second)) = sess.opts.unstable_opts.sanitizer.mutually_exclusive() {
+    if let Some((first, second)) = sess.opts.cg.sanitize.mutually_exclusive() {
         sess.dcx().emit_err(errors::CannotMixAndMatchSanitizers {
             first: first.to_string(),
             second: second.to_string(),
         });
     }
 
     // Cannot enable crt-static with sanitizers on Linux
-    if sess.crt_static(None)
-        && !sess.opts.unstable_opts.sanitizer.is_empty()
-        && !sess.target.is_like_msvc
-    {
+    if sess.crt_static(None) && !sess.sanitizers().is_empty() && !sess.target.is_like_msvc {
         sess.dcx().emit_err(errors::CannotEnableCrtStaticLinux);
     }
 

compiler/rustc_target/src/spec/json.rs

@@ -401,6 +401,7 @@ impl ToJson for Target {
         target_option_val!(supported_split_debuginfo);
         target_option_val!(supported_sanitizers);
         target_option_val!(default_sanitizers);
+        target_option_val!(stable_sanitizers);
         target_option_val!(c_enum_min_bits);
         target_option_val!(generate_arange_section);
         target_option_val!(supports_stack_protector);

compiler/rustc_target/src/spec/mod.rs

@@ -1233,6 +1233,28 @@ impl SanitizerSet {
         })
     }
 
+    pub fn from_comma_list(s: &str) -> Result<Self, String> {
+        let mut sanitizer_set = SanitizerSet::empty();
+        for name in s.split(',') {
+            sanitizer_set |= match name {
+                "address" => SanitizerSet::ADDRESS,
+                "cfi" => SanitizerSet::CFI,
+                "dataflow" => SanitizerSet::DATAFLOW,
+                "kcfi" => SanitizerSet::KCFI,
+                "kernel-address" => SanitizerSet::KERNELADDRESS,
+                "leak" => SanitizerSet::LEAK,
+                "memory" => SanitizerSet::MEMORY,
+                "memtag" => SanitizerSet::MEMTAG,
+                "safestack" => SanitizerSet::SAFESTACK,
+                "shadow-call-stack" => SanitizerSet::SHADOWCALLSTACK,
+                "thread" => SanitizerSet::THREAD,
+                "hwaddress" => SanitizerSet::HWADDRESS,
+                _ => return Err(format!("Unknown sanitizer {}", name)),
+            };
+        }
+        return Ok(sanitizer_set);
+    }
+
     pub fn mutually_exclusive(self) -> Option<(SanitizerSet, SanitizerSet)> {
         Self::MUTUALLY_EXCLUSIVE
             .into_iter()
@@ -2563,6 +2585,13 @@ pub struct TargetOptions {
     /// distributed with the target, the sanitizer should still appear in this list for the target.
     pub default_sanitizers: SanitizerSet,
 
+    /// The stable sanitizers supported by this target
+    ///
+    /// Note that the support here is at a codegen level. If the machine code with sanitizer
+    /// enabled can generated on this target, but the necessary supporting libraries are not
+    /// distributed with the target, the sanitizer should still appear in this list for the target.
+    pub stable_sanitizers: SanitizerSet,
+
     /// Minimum number of bits in #[repr(C)] enum. Defaults to the size of c_int
     pub c_enum_min_bits: Option<u64>,
 
@@ -2817,6 +2846,7 @@ impl Default for TargetOptions {
             supported_split_debuginfo: Cow::Borrowed(&[SplitDebuginfo::Off]),
             supported_sanitizers: SanitizerSet::empty(),
             default_sanitizers: SanitizerSet::empty(),
+            stable_sanitizers: SanitizerSet::empty(),
             c_enum_min_bits: None,
             generate_arange_section: true,
             supports_stack_protector: true,

src/tools/compiletest/src/common.rs

@@ -1009,7 +1009,9 @@ pub struct TargetCfg {
     #[serde(default)]
     pub(crate) dynamic_linking: bool,
     #[serde(rename = "supported-sanitizers", default)]
-    pub(crate) sanitizers: Vec<Sanitizer>,
+    pub(crate) supported_sanitizers: Vec<Sanitizer>,
+    #[serde(rename = "stable-sanitizers", default)]
+    pub(crate) stable_sanitizers: Vec<Sanitizer>,
     #[serde(rename = "supports-xray", default)]
     pub(crate) xray: bool,
     #[serde(default = "default_reloc_model")]