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-rw-r--r--library/unwind/Cargo.toml34
-rw-r--r--library/unwind/build.rs48
-rw-r--r--library/unwind/src/lib.rs90
-rw-r--r--library/unwind/src/libunwind.rs296
4 files changed, 468 insertions, 0 deletions
diff --git a/library/unwind/Cargo.toml b/library/unwind/Cargo.toml
new file mode 100644
index 000000000..69fce8d77
--- /dev/null
+++ b/library/unwind/Cargo.toml
@@ -0,0 +1,34 @@
+[package]
+name = "unwind"
+version = "0.0.0"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rust-lang/rust.git"
+edition = "2021"
+include = [
+ '/libunwind/*',
+]
+
+[lib]
+test = false
+bench = false
+doc = false
+
+[dependencies]
+core = { path = "../core" }
+libc = { version = "0.2.79", features = ['rustc-dep-of-std'], default-features = false }
+compiler_builtins = "0.1.0"
+cfg-if = "0.1.8"
+
+[build-dependencies]
+cc = "1.0.69"
+
+[features]
+
+# Only applies for Linux and Fuchsia targets
+# Static link to the in-tree build of llvm libunwind
+llvm-libunwind = []
+
+# Only applies for Linux and Fuchsia targets
+# If crt-static is enabled, static link to `libunwind.a` provided by system
+# If crt-static is disabled, dynamic link to `libunwind.so` provided by system
+system-llvm-libunwind = []
diff --git a/library/unwind/build.rs b/library/unwind/build.rs
new file mode 100644
index 000000000..f88e6a924
--- /dev/null
+++ b/library/unwind/build.rs
@@ -0,0 +1,48 @@
+use std::env;
+
+fn main() {
+ println!("cargo:rerun-if-changed=build.rs");
+ let target = env::var("TARGET").expect("TARGET was not set");
+
+ if target.contains("android") {
+ let build = cc::Build::new();
+
+ // Since ndk r23 beta 3 `libgcc` was replaced with `libunwind` thus
+ // check if we have `libunwind` available and if so use it. Otherwise
+ // fall back to `libgcc` to support older ndk versions.
+ let has_unwind = build.is_flag_supported("-lunwind").expect("Unable to invoke compiler");
+
+ if has_unwind {
+ println!("cargo:rustc-link-lib=unwind");
+ } else {
+ println!("cargo:rustc-link-lib=gcc");
+ }
+
+ // Android's unwinding library depends on dl_iterate_phdr in `libdl`.
+ println!("cargo:rustc-link-lib=dl");
+ } else if target.contains("freebsd") {
+ println!("cargo:rustc-link-lib=gcc_s");
+ } else if target.contains("netbsd") {
+ println!("cargo:rustc-link-lib=gcc_s");
+ } else if target.contains("openbsd") {
+ if target.contains("sparc64") {
+ println!("cargo:rustc-link-lib=gcc");
+ } else {
+ println!("cargo:rustc-link-lib=c++abi");
+ }
+ } else if target.contains("solaris") {
+ println!("cargo:rustc-link-lib=gcc_s");
+ } else if target.contains("illumos") {
+ println!("cargo:rustc-link-lib=gcc_s");
+ } else if target.contains("dragonfly") {
+ println!("cargo:rustc-link-lib=gcc_pic");
+ } else if target.ends_with("pc-windows-gnu") {
+ // This is handled in the target spec with late_link_args_[static|dynamic]
+ } else if target.contains("uwp-windows-gnu") {
+ println!("cargo:rustc-link-lib=unwind");
+ } else if target.contains("haiku") {
+ println!("cargo:rustc-link-lib=gcc_s");
+ } else if target.contains("redox") {
+ // redox is handled in lib.rs
+ }
+}
diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs
new file mode 100644
index 000000000..4a6ba6e10
--- /dev/null
+++ b/library/unwind/src/lib.rs
@@ -0,0 +1,90 @@
+#![no_std]
+#![unstable(feature = "panic_unwind", issue = "32837")]
+#![feature(link_cfg)]
+#![feature(staged_api)]
+#![feature(c_unwind)]
+#![feature(cfg_target_abi)]
+#![cfg_attr(not(target_env = "msvc"), feature(libc))]
+
+cfg_if::cfg_if! {
+ if #[cfg(target_env = "msvc")] {
+ // Windows MSVC no extra unwinder support needed
+ } else if #[cfg(any(
+ target_os = "l4re",
+ target_os = "none",
+ target_os = "espidf",
+ ))] {
+ // These "unix" family members do not have unwinder.
+ // Note this also matches x86_64-unknown-none-linuxkernel.
+ } else if #[cfg(any(
+ unix,
+ windows,
+ target_os = "psp",
+ target_os = "solid_asp3",
+ all(target_vendor = "fortanix", target_env = "sgx"),
+ ))] {
+ mod libunwind;
+ pub use libunwind::*;
+ } else {
+ // no unwinder on the system!
+ // - wasm32 (not emscripten, which is "unix" family)
+ // - os=none ("bare metal" targets)
+ // - os=hermit
+ // - os=uefi
+ // - os=cuda
+ // - nvptx64-nvidia-cuda
+ // - Any new targets not listed above.
+ }
+}
+
+#[cfg(target_env = "musl")]
+cfg_if::cfg_if! {
+ if #[cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind"))] {
+ compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
+ } else if #[cfg(feature = "llvm-libunwind")] {
+ #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
+ extern "C" {}
+ } else if #[cfg(feature = "system-llvm-libunwind")] {
+ #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+ #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
+ extern "C" {}
+ } else {
+ #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+ #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
+ extern "C" {}
+ }
+}
+
+// When building with crt-static, we get `gcc_eh` from the `libc` crate, since
+// glibc needs it, and needs it listed later on the linker command line. We
+// don't want to duplicate it here.
+#[cfg(all(
+ target_os = "linux",
+ any(target_env = "gnu", target_env = "uclibc"),
+ not(feature = "llvm-libunwind"),
+ not(feature = "system-llvm-libunwind")
+))]
+#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
+#[cfg(all(
+ target_os = "linux",
+ any(target_env = "gnu", target_env = "uclibc"),
+ not(feature = "llvm-libunwind"),
+ feature = "system-llvm-libunwind"
+))]
+#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
+#[cfg(target_os = "redox")]
+#[link(name = "gcc_eh", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
+#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
+#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
+#[link(name = "unwind", kind = "static", modifiers = "-bundle")]
+extern "C" {}
+
+#[cfg(all(target_os = "windows", target_env = "gnu", target_abi = "llvm"))]
+#[link(name = "unwind", kind = "static", modifiers = "-bundle")]
+extern "C" {}
diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs
new file mode 100644
index 000000000..a5b6193b0
--- /dev/null
+++ b/library/unwind/src/libunwind.rs
@@ -0,0 +1,296 @@
+#![allow(nonstandard_style)]
+
+use libc::{c_int, c_void, uintptr_t};
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum _Unwind_Reason_Code {
+ _URC_NO_REASON = 0,
+ _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+ _URC_FATAL_PHASE2_ERROR = 2,
+ _URC_FATAL_PHASE1_ERROR = 3,
+ _URC_NORMAL_STOP = 4,
+ _URC_END_OF_STACK = 5,
+ _URC_HANDLER_FOUND = 6,
+ _URC_INSTALL_CONTEXT = 7,
+ _URC_CONTINUE_UNWIND = 8,
+ _URC_FAILURE = 9, // used only by ARM EHABI
+}
+pub use _Unwind_Reason_Code::*;
+
+pub type _Unwind_Exception_Class = u64;
+pub type _Unwind_Word = uintptr_t;
+pub type _Unwind_Ptr = uintptr_t;
+pub type _Unwind_Trace_Fn =
+ extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code;
+
+#[cfg(target_arch = "x86")]
+pub const unwinder_private_data_size: usize = 5;
+
+#[cfg(target_arch = "x86_64")]
+pub const unwinder_private_data_size: usize = 6;
+
+#[cfg(all(target_arch = "arm", not(any(target_os = "ios", target_os = "watchos"))))]
+pub const unwinder_private_data_size: usize = 20;
+
+#[cfg(all(target_arch = "arm", any(target_os = "ios", target_os = "watchos")))]
+pub const unwinder_private_data_size: usize = 5;
+
+#[cfg(all(target_arch = "aarch64", target_pointer_width = "64"))]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(all(target_arch = "aarch64", target_pointer_width = "32"))]
+pub const unwinder_private_data_size: usize = 5;
+
+#[cfg(target_arch = "m68k")]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(target_arch = "mips")]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(target_arch = "mips64")]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(target_arch = "s390x")]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
+pub const unwinder_private_data_size: usize = 2;
+
+#[cfg(target_os = "emscripten")]
+pub const unwinder_private_data_size: usize = 20;
+
+#[cfg(all(target_arch = "hexagon", target_os = "linux"))]
+pub const unwinder_private_data_size: usize = 35;
+
+#[repr(C)]
+pub struct _Unwind_Exception {
+ pub exception_class: _Unwind_Exception_Class,
+ pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
+ pub private: [_Unwind_Word; unwinder_private_data_size],
+}
+
+pub enum _Unwind_Context {}
+
+pub type _Unwind_Exception_Cleanup_Fn =
+ extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
+
+// FIXME: The `#[link]` attributes on `extern "C"` block marks those symbols declared in
+// the block are reexported in dylib build of libstd. This is needed when build rustc with
+// feature `llvm-libunwind', as no other cdylib will provided those _Unwind_* symbols.
+// However the `link` attribute is duplicated multiple times and does not just export symbol,
+// a better way to manually export symbol would be another attribute like `#[export]`.
+// See the logic in function rustc_codegen_ssa::src::back::exported_symbols, module
+// rustc_codegen_ssa::src::back::symbol_export, rustc_middle::middle::exported_symbols
+// and RFC 2841
+#[cfg_attr(
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ link(name = "unwind", kind = "static", modifiers = "-bundle")
+)]
+extern "C-unwind" {
+ pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
+}
+extern "C" {
+ pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
+ pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
+ pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
+ pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
+ pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
+}
+
+cfg_if::cfg_if! {
+if #[cfg(any(target_os = "ios", target_os = "watchos", target_os = "netbsd", not(target_arch = "arm")))] {
+ // Not ARM EHABI
+ #[repr(C)]
+ #[derive(Copy, Clone, PartialEq)]
+ pub enum _Unwind_Action {
+ _UA_SEARCH_PHASE = 1,
+ _UA_CLEANUP_PHASE = 2,
+ _UA_HANDLER_FRAME = 4,
+ _UA_FORCE_UNWIND = 8,
+ _UA_END_OF_STACK = 16,
+ }
+ pub use _Unwind_Action::*;
+
+ #[cfg_attr(
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ link(name = "unwind", kind = "static", modifiers = "-bundle")
+ )]
+ extern "C" {
+ pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
+ pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
+ pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
+ pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
+ pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
+ -> _Unwind_Word;
+ pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
+ }
+
+} else {
+ // ARM EHABI
+ #[repr(C)]
+ #[derive(Copy, Clone, PartialEq)]
+ pub enum _Unwind_State {
+ _US_VIRTUAL_UNWIND_FRAME = 0,
+ _US_UNWIND_FRAME_STARTING = 1,
+ _US_UNWIND_FRAME_RESUME = 2,
+ _US_ACTION_MASK = 3,
+ _US_FORCE_UNWIND = 8,
+ _US_END_OF_STACK = 16,
+ }
+ pub use _Unwind_State::*;
+
+ #[repr(C)]
+ enum _Unwind_VRS_Result {
+ _UVRSR_OK = 0,
+ _UVRSR_NOT_IMPLEMENTED = 1,
+ _UVRSR_FAILED = 2,
+ }
+ #[repr(C)]
+ enum _Unwind_VRS_RegClass {
+ _UVRSC_CORE = 0,
+ _UVRSC_VFP = 1,
+ _UVRSC_FPA = 2,
+ _UVRSC_WMMXD = 3,
+ _UVRSC_WMMXC = 4,
+ }
+ use _Unwind_VRS_RegClass::*;
+ #[repr(C)]
+ enum _Unwind_VRS_DataRepresentation {
+ _UVRSD_UINT32 = 0,
+ _UVRSD_VFPX = 1,
+ _UVRSD_FPAX = 2,
+ _UVRSD_UINT64 = 3,
+ _UVRSD_FLOAT = 4,
+ _UVRSD_DOUBLE = 5,
+ }
+ use _Unwind_VRS_DataRepresentation::*;
+
+ pub const UNWIND_POINTER_REG: c_int = 12;
+ pub const UNWIND_SP_REG: c_int = 13;
+ pub const UNWIND_IP_REG: c_int = 15;
+
+ #[cfg_attr(
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ link(name = "unwind", kind = "static", modifiers = "-bundle")
+ )]
+ extern "C" {
+ fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
+ regclass: _Unwind_VRS_RegClass,
+ regno: _Unwind_Word,
+ repr: _Unwind_VRS_DataRepresentation,
+ data: *mut c_void)
+ -> _Unwind_VRS_Result;
+
+ fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
+ regclass: _Unwind_VRS_RegClass,
+ regno: _Unwind_Word,
+ repr: _Unwind_VRS_DataRepresentation,
+ data: *mut c_void)
+ -> _Unwind_VRS_Result;
+ }
+
+ // On Android or ARM/Linux, these are implemented as macros:
+
+ pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
+ let mut val: _Unwind_Word = 0;
+ _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
+ &mut val as *mut _ as *mut c_void);
+ val
+ }
+
+ pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
+ let mut value = value;
+ _Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
+ &mut value as *mut _ as *mut c_void);
+ }
+
+ pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
+ -> _Unwind_Word {
+ let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
+ (val & !1) as _Unwind_Word
+ }
+
+ pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
+ value: _Unwind_Word) {
+ // Propagate thumb bit to instruction pointer
+ let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
+ let value = value | thumb_state;
+ _Unwind_SetGR(ctx, UNWIND_IP_REG, value);
+ }
+
+ pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
+ ip_before_insn: *mut c_int)
+ -> _Unwind_Word {
+ *ip_before_insn = 0;
+ _Unwind_GetIP(ctx)
+ }
+
+ // This function also doesn't exist on Android or ARM/Linux, so make it a no-op
+ pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
+ pc
+ }
+}
+} // cfg_if!
+
+cfg_if::cfg_if! {
+if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
+ // Not 32-bit iOS
+ #[cfg_attr(
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ link(name = "unwind", kind = "static", modifiers = "-bundle")
+ )]
+ extern "C-unwind" {
+ pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
+ }
+ #[cfg_attr(
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ link(name = "unwind", kind = "static", modifiers = "-bundle")
+ )]
+ extern "C" {
+ pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
+ trace_argument: *mut c_void)
+ -> _Unwind_Reason_Code;
+ }
+} else {
+ // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
+ extern "C-unwind" {
+ pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
+ }
+
+ pub use _Unwind_SjLj_RaiseException as _Unwind_RaiseException;
+}
+} // cfg_if!
+
+cfg_if::cfg_if! {
+if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
+ // We declare these as opaque types. This is fine since you just need to
+ // pass them to _GCC_specific_handler and forget about them.
+ pub enum EXCEPTION_RECORD {}
+ pub type LPVOID = *mut c_void;
+ pub enum CONTEXT {}
+ pub enum DISPATCHER_CONTEXT {}
+ pub type EXCEPTION_DISPOSITION = c_int;
+ type PersonalityFn = unsafe extern "C" fn(version: c_int,
+ actions: _Unwind_Action,
+ exception_class: _Unwind_Exception_Class,
+ exception_object: *mut _Unwind_Exception,
+ context: *mut _Unwind_Context)
+ -> _Unwind_Reason_Code;
+
+ extern "C" {
+ pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
+ establisherFrame: LPVOID,
+ contextRecord: *mut CONTEXT,
+ dispatcherContext: *mut DISPATCHER_CONTEXT,
+ personality: PersonalityFn)
+ -> EXCEPTION_DISPOSITION;
+ }
+}
+} // cfg_if!
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 05:07:57 +0000