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Merge remote-tracking branch 'origin/master' into feature/llvm-osr

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This commit is contained in:
losfair
2019-08-14 16:33:26 -07:00
parent 44f71759f6 804e586196
commit 0e0573c73c
289 changed files with 35513 additions and 7333 deletions
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115
lib/llvm-backend/src/backend.rs
View File

@ -1,19 +1,19 @@
use super::stackmap::{self, StackmapRegistry, StkMapRecord, StkSizeRecord};
use crate::intrinsics::Intrinsics;
use crate::structs::{Callbacks, LLVMModule, LLVMResult, MemProtect};
use inkwell::{
memory_buffer::MemoryBuffer,
module::Module,
targets::{CodeModel, FileType, InitializationConfig, RelocMode, Target, TargetMachine},
OptimizationLevel,
};
use libc::{
c_char, mmap, mprotect, munmap, MAP_ANON, MAP_PRIVATE, PROT_EXEC, PROT_NONE, PROT_READ,
PROT_WRITE,
};
use libc::c_char;
use std::{
any::Any,
collections::BTreeMap,
ffi::{c_void, CString},
fs::File,
io::Write,
mem,
ops::Deref,
ptr::{self, NonNull},
@ -34,42 +34,6 @@ use wasmer_runtime_core::{
vm, vmcalls,
};
#[repr(C)]
struct LLVMModule {
_private: [u8; 0],
}
#[allow(non_camel_case_types, dead_code)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
enum MemProtect {
NONE,
READ,
READ_WRITE,
READ_EXECUTE,
}
#[allow(non_camel_case_types, dead_code)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
enum LLVMResult {
OK,
ALLOCATE_FAILURE,
PROTECT_FAILURE,
DEALLOC_FAILURE,
OBJECT_LOAD_FAILURE,
}
#[repr(C)]
struct Callbacks {
alloc_memory: extern "C" fn(usize, MemProtect, &mut *mut u8, &mut usize) -> LLVMResult,
protect_memory: extern "C" fn(*mut u8, usize, MemProtect) -> LLVMResult,
dealloc_memory: extern "C" fn(*mut u8, usize) -> LLVMResult,
lookup_vm_symbol: extern "C" fn(*const c_char, usize) -> *const vm::Func,
visit_fde: extern "C" fn(*mut u8, usize, extern "C" fn(*mut u8)),
}
extern "C" {
fn module_load(
mem_ptr: *const u8,
@ -84,7 +48,8 @@ extern "C" {
fn llvm_backend_get_code_ptr(module: *const LLVMModule) -> *const u8;
fn llvm_backend_get_code_size(module: *const LLVMModule) -> usize;
fn throw_trap(ty: i32);
fn throw_trap(ty: i32) -> !;
fn throw_breakpoint(ty: i64) -> !;
/// This should be the same as spliting up the fat pointer into two arguments,
/// but this is cleaner, I think?
@ -106,69 +71,21 @@ extern "C" {
}
fn get_callbacks() -> Callbacks {
fn round_up_to_page_size(size: usize) -> usize {
(size + (4096 - 1)) & !(4096 - 1)
}
extern "C" fn alloc_memory(
size: usize,
protect: MemProtect,
ptr_out: &mut *mut u8,
size_out: &mut usize,
) -> LLVMResult {
let size = round_up_to_page_size(size);
let ptr = unsafe {
mmap(
ptr::null_mut(),
size,
match protect {
MemProtect::NONE => PROT_NONE,
MemProtect::READ => PROT_READ,
MemProtect::READ_WRITE => PROT_READ | PROT_WRITE,
MemProtect::READ_EXECUTE => PROT_READ | PROT_EXEC,
},
MAP_PRIVATE | MAP_ANON,
-1,
0,
)
};
if ptr as isize == -1 {
return LLVMResult::ALLOCATE_FAILURE;
}
*ptr_out = ptr as _;
*size_out = size;
LLVMResult::OK
unsafe { crate::platform::alloc_memory(size, protect, ptr_out, size_out) }
}
extern "C" fn protect_memory(ptr: *mut u8, size: usize, protect: MemProtect) -> LLVMResult {
let res = unsafe {
mprotect(
ptr as _,
round_up_to_page_size(size),
match protect {
MemProtect::NONE => PROT_NONE,
MemProtect::READ => PROT_READ,
MemProtect::READ_WRITE => PROT_READ | PROT_WRITE,
MemProtect::READ_EXECUTE => PROT_READ | PROT_EXEC,
},
)
};
if res == 0 {
LLVMResult::OK
} else {
LLVMResult::PROTECT_FAILURE
}
unsafe { crate::platform::protect_memory(ptr, size, protect) }
}
extern "C" fn dealloc_memory(ptr: *mut u8, size: usize) -> LLVMResult {
let res = unsafe { munmap(ptr as _, round_up_to_page_size(size)) };
if res == 0 {
LLVMResult::OK
} else {
LLVMResult::DEALLOC_FAILURE
}
unsafe { crate::platform::dealloc_memory(ptr, size) }
}
extern "C" fn lookup_vm_symbol(name_ptr: *const c_char, length: usize) -> *const vm::Func {
@ -195,7 +112,13 @@ fn get_callbacks() -> Callbacks {
fn_name!("vm.memory.grow.static.local") => vmcalls::local_static_memory_grow as _,
fn_name!("vm.memory.size.static.local") => vmcalls::local_static_memory_size as _,
fn_name!("vm.memory.grow.dynamic.import") => vmcalls::imported_dynamic_memory_grow as _,
fn_name!("vm.memory.size.dynamic.import") => vmcalls::imported_dynamic_memory_size as _,
fn_name!("vm.memory.grow.static.import") => vmcalls::imported_static_memory_grow as _,
fn_name!("vm.memory.size.static.import") => vmcalls::imported_static_memory_size as _,
fn_name!("vm.exception.trap") => throw_trap as _,
fn_name!("vm.breakpoint") => throw_breakpoint as _,
_ => ptr::null(),
}
@ -275,6 +198,14 @@ impl LLVMBackend {
.unwrap();
let mem_buf_slice = memory_buffer.as_slice();
if let Some(path) = unsafe { &crate::GLOBAL_OPTIONS.obj_file } {
let mut file = File::create(path).unwrap();
let mut pos = 0;
while pos < mem_buf_slice.len() {
pos += file.write(&mem_buf_slice[pos..]).unwrap();
}
}
let callbacks = get_callbacks();
let mut module: *mut LLVMModule = ptr::null_mut();

2258
lib/llvm-backend/src/code.rs
View File

File diff suppressed because it is too large Load Diff

211
lib/llvm-backend/src/intrinsics.rs
View File

@ -1,12 +1,15 @@
use hashbrown::HashMap;
use inkwell::{
attributes::{Attribute, AttributeLoc},
builder::Builder,
context::Context,
module::Module,
types::{BasicType, FloatType, FunctionType, IntType, PointerType, StructType, VoidType},
types::{
BasicType, FloatType, FunctionType, IntType, PointerType, StructType, VectorType, VoidType,
},
values::{BasicValue, BasicValueEnum, FloatValue, FunctionValue, IntValue, PointerValue},
AddressSpace,
};
use std::collections::HashMap;
use std::marker::PhantomData;
use wasmer_runtime_core::{
memory::MemoryType,
@ -16,7 +19,7 @@ use wasmer_runtime_core::{
GlobalIndex, ImportedFuncIndex, LocalFuncIndex, LocalOrImport, MemoryIndex, SigIndex,
TableIndex, Type,
},
vm::Ctx,
vm::{Ctx, INTERNALS_SIZE},
};
fn type_to_llvm_ptr(intrinsics: &Intrinsics, ty: Type) -> PointerType {
@ -25,6 +28,7 @@ fn type_to_llvm_ptr(intrinsics: &Intrinsics, ty: Type) -> PointerType {
Type::I64 => intrinsics.i64_ptr_ty,
Type::F32 => intrinsics.f32_ptr_ty,
Type::F64 => intrinsics.f64_ptr_ty,
Type::V128 => intrinsics.i128_ptr_ty,
}
}
@ -40,12 +44,18 @@ pub struct Intrinsics {
pub sqrt_f32: FunctionValue,
pub sqrt_f64: FunctionValue,
pub sqrt_f32x4: FunctionValue,
pub sqrt_f64x2: FunctionValue,
pub minimum_f32: FunctionValue,
pub minimum_f64: FunctionValue,
pub minimum_f32x4: FunctionValue,
pub minimum_f64x2: FunctionValue,
pub maximum_f32: FunctionValue,
pub maximum_f64: FunctionValue,
pub maximum_f32x4: FunctionValue,
pub maximum_f64x2: FunctionValue,
pub ceil_f32: FunctionValue,
pub ceil_f64: FunctionValue,
@ -61,10 +71,22 @@ pub struct Intrinsics {
pub fabs_f32: FunctionValue,
pub fabs_f64: FunctionValue,
pub fabs_f32x4: FunctionValue,
pub fabs_f64x2: FunctionValue,
pub copysign_f32: FunctionValue,
pub copysign_f64: FunctionValue,
pub sadd_sat_i8x16: FunctionValue,
pub sadd_sat_i16x8: FunctionValue,
pub uadd_sat_i8x16: FunctionValue,
pub uadd_sat_i16x8: FunctionValue,
pub ssub_sat_i8x16: FunctionValue,
pub ssub_sat_i16x8: FunctionValue,
pub usub_sat_i8x16: FunctionValue,
pub usub_sat_i16x8: FunctionValue,
pub expect_i1: FunctionValue,
pub trap: FunctionValue,
@ -74,21 +96,33 @@ pub struct Intrinsics {
pub i16_ty: IntType,
pub i32_ty: IntType,
pub i64_ty: IntType,
pub i128_ty: IntType,
pub f32_ty: FloatType,
pub f64_ty: FloatType,
pub i1x128_ty: VectorType,
pub i8x16_ty: VectorType,
pub i16x8_ty: VectorType,
pub i32x4_ty: VectorType,
pub i64x2_ty: VectorType,
pub f32x4_ty: VectorType,
pub f64x2_ty: VectorType,
pub i8_ptr_ty: PointerType,
pub i16_ptr_ty: PointerType,
pub i32_ptr_ty: PointerType,
pub i64_ptr_ty: PointerType,
pub i128_ptr_ty: PointerType,
pub f32_ptr_ty: PointerType,
pub f64_ptr_ty: PointerType,
pub anyfunc_ty: StructType,
pub i1_zero: IntValue,
pub i8_zero: IntValue,
pub i32_zero: IntValue,
pub i64_zero: IntValue,
pub i128_zero: IntValue,
pub f32_zero: FloatValue,
pub f64_zero: FloatValue,
@ -114,6 +148,7 @@ pub struct Intrinsics {
pub memory_size_shared_import: FunctionValue,
pub throw_trap: FunctionValue,
pub throw_breakpoint: FunctionValue,
pub experimental_stackmap: FunctionValue,
@ -128,19 +163,31 @@ impl Intrinsics {
let i16_ty = context.i16_type();
let i32_ty = context.i32_type();
let i64_ty = context.i64_type();
let i128_ty = context.i128_type();
let f32_ty = context.f32_type();
let f64_ty = context.f64_type();
let i1x128_ty = i1_ty.vec_type(128);
let i8x16_ty = i8_ty.vec_type(16);
let i16x8_ty = i16_ty.vec_type(8);
let i32x4_ty = i32_ty.vec_type(4);
let i64x2_ty = i64_ty.vec_type(2);
let f32x4_ty = f32_ty.vec_type(4);
let f64x2_ty = f64_ty.vec_type(2);
let i8_ptr_ty = i8_ty.ptr_type(AddressSpace::Generic);
let i16_ptr_ty = i16_ty.ptr_type(AddressSpace::Generic);
let i32_ptr_ty = i32_ty.ptr_type(AddressSpace::Generic);
let i64_ptr_ty = i64_ty.ptr_type(AddressSpace::Generic);
let i128_ptr_ty = i128_ty.ptr_type(AddressSpace::Generic);
let f32_ptr_ty = f32_ty.ptr_type(AddressSpace::Generic);
let f64_ptr_ty = f64_ty.ptr_type(AddressSpace::Generic);
let i1_zero = i1_ty.const_int(0, false);
let i8_zero = i8_ty.const_int(0, false);
let i32_zero = i32_ty.const_int(0, false);
let i64_zero = i64_ty.const_int(0, false);
let i128_zero = i128_ty.const_int(0, false);
let f32_zero = f32_ty.const_float(0.0);
let f64_zero = f64_ty.const_float(0.0);
@ -149,6 +196,10 @@ impl Intrinsics {
let i64_ty_basic = i64_ty.as_basic_type_enum();
let f32_ty_basic = f32_ty.as_basic_type_enum();
let f64_ty_basic = f64_ty.as_basic_type_enum();
let i8x16_ty_basic = i8x16_ty.as_basic_type_enum();
let i16x8_ty_basic = i16x8_ty.as_basic_type_enum();
let f32x4_ty_basic = f32x4_ty.as_basic_type_enum();
let f64x2_ty_basic = f64x2_ty.as_basic_type_enum();
let i8_ptr_ty_basic = i8_ptr_ty.as_basic_type_enum();
let ctx_ty = context.opaque_struct_type("ctx");
@ -235,6 +286,9 @@ impl Intrinsics {
false,
);
let ret_i8x16_take_i8x16_i8x16 = i8x16_ty.fn_type(&[i8x16_ty_basic, i8x16_ty_basic], false);
let ret_i16x8_take_i16x8_i16x8 = i16x8_ty.fn_type(&[i16x8_ty_basic, i16x8_ty_basic], false);
let ret_i32_take_i32_i1 = i32_ty.fn_type(&[i32_ty_basic, i1_ty_basic], false);
let ret_i64_take_i64_i1 = i64_ty.fn_type(&[i64_ty_basic, i1_ty_basic], false);
@ -243,9 +297,13 @@ impl Intrinsics {
let ret_f32_take_f32 = f32_ty.fn_type(&[f32_ty_basic], false);
let ret_f64_take_f64 = f64_ty.fn_type(&[f64_ty_basic], false);
let ret_f32x4_take_f32x4 = f32x4_ty.fn_type(&[f32x4_ty_basic], false);
let ret_f64x2_take_f64x2 = f64x2_ty.fn_type(&[f64x2_ty_basic], false);
let ret_f32_take_f32_f32 = f32_ty.fn_type(&[f32_ty_basic, f32_ty_basic], false);
let ret_f64_take_f64_f64 = f64_ty.fn_type(&[f64_ty_basic, f64_ty_basic], false);
let ret_f32x4_take_f32x4_f32x4 = f32x4_ty.fn_type(&[f32x4_ty_basic, f32x4_ty_basic], false);
let ret_f64x2_take_f64x2_f64x2 = f64x2_ty.fn_type(&[f64x2_ty_basic, f64x2_ty_basic], false);
let ret_i32_take_ctx_i32_i32 = i32_ty.fn_type(
&[ctx_ptr_ty.as_basic_type_enum(), i32_ty_basic, i32_ty_basic],
@ -255,8 +313,7 @@ impl Intrinsics {
i32_ty.fn_type(&[ctx_ptr_ty.as_basic_type_enum(), i32_ty_basic], false);
let ret_i1_take_i1_i1 = i1_ty.fn_type(&[i1_ty_basic, i1_ty_basic], false);
Self {
let intrinsics = Self {
ctlz_i32: module.add_function("llvm.ctlz.i32", ret_i32_take_i32_i1, None),
ctlz_i64: module.add_function("llvm.ctlz.i64", ret_i64_take_i64_i1, None),
@ -268,12 +325,34 @@ impl Intrinsics {
sqrt_f32: module.add_function("llvm.sqrt.f32", ret_f32_take_f32, None),
sqrt_f64: module.add_function("llvm.sqrt.f64", ret_f64_take_f64, None),
sqrt_f32x4: module.add_function("llvm.sqrt.v4f32", ret_f32x4_take_f32x4, None),
sqrt_f64x2: module.add_function("llvm.sqrt.v2f64", ret_f64x2_take_f64x2, None),
minimum_f32: module.add_function("llvm.minnum.f32", ret_f32_take_f32_f32, None),
minimum_f64: module.add_function("llvm.minnum.f64", ret_f64_take_f64_f64, None),
minimum_f32x4: module.add_function(
"llvm.minnum.v4f32",
ret_f32x4_take_f32x4_f32x4,
None,
),
minimum_f64x2: module.add_function(
"llvm.minnum.v2f64",
ret_f64x2_take_f64x2_f64x2,
None,
),
maximum_f32: module.add_function("llvm.maxnum.f32", ret_f32_take_f32_f32, None),
maximum_f64: module.add_function("llvm.maxnum.f64", ret_f64_take_f64_f64, None),
maximum_f32x4: module.add_function(
"llvm.maxnum.v4f32",
ret_f32x4_take_f32x4_f32x4,
None,
),
maximum_f64x2: module.add_function(
"llvm.maxnum.v2f64",
ret_f64x2_take_f64x2_f64x2,
None,
),
ceil_f32: module.add_function("llvm.ceil.f32", ret_f32_take_f32, None),
ceil_f64: module.add_function("llvm.ceil.f64", ret_f64_take_f64, None),
@ -289,10 +368,54 @@ impl Intrinsics {
fabs_f32: module.add_function("llvm.fabs.f32", ret_f32_take_f32, None),
fabs_f64: module.add_function("llvm.fabs.f64", ret_f64_take_f64, None),
fabs_f32x4: module.add_function("llvm.fabs.v4f32", ret_f32x4_take_f32x4, None),
fabs_f64x2: module.add_function("llvm.fabs.v2f64", ret_f64x2_take_f64x2, None),
copysign_f32: module.add_function("llvm.copysign.f32", ret_f32_take_f32_f32, None),
copysign_f64: module.add_function("llvm.copysign.f64", ret_f64_take_f64_f64, None),
sadd_sat_i8x16: module.add_function(
"llvm.sadd.sat.v16i8",
ret_i8x16_take_i8x16_i8x16,
None,
),
sadd_sat_i16x8: module.add_function(
"llvm.sadd.sat.v8i16",
ret_i16x8_take_i16x8_i16x8,
None,
),
uadd_sat_i8x16: module.add_function(
"llvm.uadd.sat.v16i8",
ret_i8x16_take_i8x16_i8x16,
None,
),
uadd_sat_i16x8: module.add_function(
"llvm.uadd.sat.v8i16",
ret_i16x8_take_i16x8_i16x8,
None,
),
ssub_sat_i8x16: module.add_function(
"llvm.ssub.sat.v16i8",
ret_i8x16_take_i8x16_i8x16,
None,
),
ssub_sat_i16x8: module.add_function(
"llvm.ssub.sat.v8i16",
ret_i16x8_take_i16x8_i16x8,
None,
),
usub_sat_i8x16: module.add_function(
"llvm.usub.sat.v16i8",
ret_i8x16_take_i8x16_i8x16,
None,
),
usub_sat_i16x8: module.add_function(
"llvm.usub.sat.v8i16",
ret_i16x8_take_i16x8_i16x8,
None,
),
expect_i1: module.add_function("llvm.expect.i1", ret_i1_take_i1_i1, None),
trap: module.add_function("llvm.trap", void_ty.fn_type(&[], false), None),
@ -302,21 +425,33 @@ impl Intrinsics {
i16_ty,
i32_ty,
i64_ty,
i128_ty,
f32_ty,
f64_ty,
i1x128_ty,
i8x16_ty,
i16x8_ty,
i32x4_ty,
i64x2_ty,
f32x4_ty,
f64x2_ty,
i8_ptr_ty,
i16_ptr_ty,
i32_ptr_ty,
i64_ptr_ty,
i128_ptr_ty,
f32_ptr_ty,
f64_ptr_ty,
anyfunc_ty,
i1_zero,
i8_zero,
i32_zero,
i64_zero,
i128_zero,
f32_zero,
f64_zero,
@ -404,8 +539,45 @@ impl Intrinsics {
),
None,
),
throw_breakpoint: module.add_function(
"vm.breakpoint",
void_ty.fn_type(&[i64_ty_basic], false),
None,
),
ctx_ptr_ty,
}
};
let readonly =
context.create_enum_attribute(Attribute::get_named_enum_kind_id("readonly"), 0);
intrinsics
.memory_size_dynamic_local
.add_attribute(AttributeLoc::Function, readonly);
intrinsics
.memory_size_static_local
.add_attribute(AttributeLoc::Function, readonly);
intrinsics
.memory_size_shared_local
.add_attribute(AttributeLoc::Function, readonly);
intrinsics
.memory_size_dynamic_import
.add_attribute(AttributeLoc::Function, readonly);
intrinsics
.memory_size_static_import
.add_attribute(AttributeLoc::Function, readonly);
intrinsics
.memory_size_shared_import
.add_attribute(AttributeLoc::Function, readonly);
let noreturn =
context.create_enum_attribute(Attribute::get_named_enum_kind_id("noreturn"), 0);
intrinsics
.throw_trap
.add_attribute(AttributeLoc::Function, noreturn);
intrinsics
.throw_breakpoint
.add_attribute(AttributeLoc::Function, noreturn);
intrinsics
}
}
@ -855,4 +1027,31 @@ impl<'a> CtxType<'a> {
(imported_func_cache.func_ptr, imported_func_cache.ctx_ptr)
}
pub fn internal_field(
&mut self,
index: usize,
intrinsics: &Intrinsics,
builder: &Builder,
) -> PointerValue {
assert!(index < INTERNALS_SIZE);
let local_internals_ptr_ptr = unsafe {
builder.build_struct_gep(
self.ctx_ptr_value,
offset_to_index(Ctx::offset_internals()),
"local_internals_ptr_ptr",
)
};
let local_internals_ptr = builder
.build_load(local_internals_ptr_ptr, "local_internals_ptr")
.into_pointer_value();
unsafe {
builder.build_in_bounds_gep(
local_internals_ptr,
&[intrinsics.i32_ty.const_int(index as u64, false)],
"local_internal_field_ptr",
)
}
}
}

33
lib/llvm-backend/src/lib.rs
View File

@ -1,4 +1,10 @@
#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
#![deny(
dead_code,
unused_imports,
unused_variables,
unused_unsafe,
unreachable_patterns
)]
#![cfg_attr(nightly, feature(unwind_attributes))]
mod backend;
@ -8,8 +14,14 @@ mod platform;
mod read_info;
mod stackmap;
mod state;
mod structs;
mod trampolines;
use std::path::PathBuf;
pub use code::LLVMFunctionCodeGenerator as FunctionCodeGenerator;
pub use code::LLVMModuleCodeGenerator as ModuleCodeGenerator;
use wasmer_runtime_core::codegen::SimpleStreamingCompilerGen;
pub type LLVMCompiler = SimpleStreamingCompilerGen<
@ -18,3 +30,22 @@ pub type LLVMCompiler = SimpleStreamingCompilerGen<
backend::LLVMBackend,
code::CodegenError,
>;
#[derive(Debug, Clone)]
/// LLVM backend flags.
pub struct LLVMOptions {
/// Emit LLVM IR before optimization pipeline.
pub pre_opt_ir: Option<PathBuf>,
/// Emit LLVM IR after optimization pipeline.
pub post_opt_ir: Option<PathBuf>,
/// Emit LLVM generated native code object file.
pub obj_file: Option<PathBuf>,
}
pub static mut GLOBAL_OPTIONS: LLVMOptions = LLVMOptions {
pre_opt_ir: None,
post_opt_ir: None,
obj_file: None,
};

3
lib/llvm-backend/src/platform/common.rs Normal file
View File

@ -0,0 +1,3 @@
pub fn round_up_to_page_size(size: usize) -> usize {
(size + (4096 - 1)) & !(4096 - 1)
}

9
lib/llvm-backend/src/platform/mod.rs
View File

@ -1,7 +1,14 @@
mod common;
#[cfg(unix)]
mod unix;
#[cfg(unix)]
pub use self::unix::*;
#[cfg(target_family = "windows")]
compile_error!("windows not yet supported for the llvm-based compiler backend");
mod win;
#[cfg(target_family = "windows")]
pub use self::win::*;
#[cfg(not(any(unix, target_family = "windows")))]
compile_error!("Your system is not yet supported for the llvm-based compiler backend");

65
lib/llvm-backend/src/platform/unix.rs
View File

@ -1,5 +1,11 @@
use libc::{c_void, siginfo_t};
use super::common::round_up_to_page_size;
use crate::structs::{LLVMResult, MemProtect};
use libc::{
c_void, mmap, mprotect, munmap, siginfo_t, MAP_ANON, MAP_PRIVATE, PROT_EXEC, PROT_NONE,
PROT_READ, PROT_WRITE,
};
use nix::sys::signal::{sigaction, SaFlags, SigAction, SigHandler, SigSet, SIGBUS, SIGSEGV};
use std::ptr;
/// `__register_frame` and `__deregister_frame` on macos take a single fde as an
/// argument, so we need to parse the fde table here.
@ -68,3 +74,60 @@ extern "C" fn signal_trap_handler(
throw_trap(2);
}
}
pub unsafe fn alloc_memory(
size: usize,
protect: MemProtect,
ptr_out: &mut *mut u8,
size_out: &mut usize,
) -> LLVMResult {
let size = round_up_to_page_size(size);
let ptr = mmap(
ptr::null_mut(),
size,
match protect {
MemProtect::NONE => PROT_NONE,
MemProtect::READ => PROT_READ,
MemProtect::READ_WRITE => PROT_READ | PROT_WRITE,
MemProtect::READ_EXECUTE => PROT_READ | PROT_EXEC,
},
MAP_PRIVATE | MAP_ANON,
-1,
0,
);
if ptr as isize == -1 {
return LLVMResult::ALLOCATE_FAILURE;
}
*ptr_out = ptr as _;
*size_out = size;
LLVMResult::OK
}
pub unsafe fn protect_memory(ptr: *mut u8, size: usize, protect: MemProtect) -> LLVMResult {
let res = mprotect(
ptr as _,
round_up_to_page_size(size),
match protect {
MemProtect::NONE => PROT_NONE,
MemProtect::READ => PROT_READ,
MemProtect::READ_WRITE => PROT_READ | PROT_WRITE,
MemProtect::READ_EXECUTE => PROT_READ | PROT_EXEC,
},
);
if res == 0 {
LLVMResult::OK
} else {
LLVMResult::PROTECT_FAILURE
}
}
pub unsafe fn dealloc_memory(ptr: *mut u8, size: usize) -> LLVMResult {
let res = munmap(ptr as _, round_up_to_page_size(size));
if res == 0 {
LLVMResult::OK
} else {
LLVMResult::DEALLOC_FAILURE
}
}

80
lib/llvm-backend/src/platform/win.rs Normal file
View File

@ -0,0 +1,80 @@
use super::common::round_up_to_page_size;
use crate::structs::{LLVMResult, MemProtect};
use std::ptr;
use winapi::um::memoryapi::{VirtualAlloc, VirtualFree};
use winapi::um::winnt::{
MEM_COMMIT, MEM_DECOMMIT, MEM_RESERVE, PAGE_EXECUTE_READ, PAGE_NOACCESS, PAGE_READONLY,
PAGE_READWRITE,
};
pub unsafe fn visit_fde(_addr: *mut u8, _size: usize, _visitor: extern "C" fn(*mut u8)) {
// Do nothing on Windows
}
pub unsafe fn install_signal_handler() {
// Do nothing on Windows
}
pub unsafe fn alloc_memory(
size: usize,
protect: MemProtect,
ptr_out: &mut *mut u8,
size_out: &mut usize,
) -> LLVMResult {
let size = round_up_to_page_size(size);
let flags = if protect == MemProtect::NONE {
MEM_RESERVE
} else {
MEM_RESERVE | MEM_COMMIT
};
let ptr = VirtualAlloc(
ptr::null_mut(),
size,
flags,
memprotect_to_protect_const(protect),
);
if ptr.is_null() {
return LLVMResult::ALLOCATE_FAILURE;
}
*ptr_out = ptr as _;
*size_out = size;
LLVMResult::OK
}
pub unsafe fn protect_memory(ptr: *mut u8, size: usize, protect: MemProtect) -> LLVMResult {
let size = round_up_to_page_size(size);
let ptr = VirtualAlloc(
ptr as _,
size,
MEM_COMMIT,
memprotect_to_protect_const(protect),
);
if ptr.is_null() {
LLVMResult::PROTECT_FAILURE
} else {
LLVMResult::OK
}
}
pub unsafe fn dealloc_memory(ptr: *mut u8, size: usize) -> LLVMResult {
let success = VirtualFree(ptr as _, size, MEM_DECOMMIT);
// If the function succeeds, the return value is nonzero.
if success == 1 {
LLVMResult::OK
} else {
LLVMResult::DEALLOC_FAILURE
}
}
fn memprotect_to_protect_const(protect: MemProtect) -> u32 {
match protect {
MemProtect::NONE => PAGE_NOACCESS,
MemProtect::READ => PAGE_READONLY,
MemProtect::READ_WRITE => PAGE_READWRITE,
MemProtect::READ_EXECUTE => PAGE_EXECUTE_READ,
}
}

7
lib/llvm-backend/src/read_info.rs
View File

@ -7,12 +7,7 @@ pub fn type_to_type(ty: WpType) -> Result<Type, BinaryReaderError> {
WpType::I64 => Type::I64,
WpType::F32 => Type::F32,
WpType::F64 => Type::F64,
WpType::V128 => {
return Err(BinaryReaderError {
message: "the wasmer llvm backend does not yet support the simd extension",
offset: -1isize as usize,
});
}
WpType::V128 => Type::V128,
_ => {
return Err(BinaryReaderError {
message: "that type is not supported as a wasmer type",

6
lib/llvm-backend/src/stackmap.rs
View File

@ -97,12 +97,6 @@ impl StackmapEntry {
end: Option<(&StackmapEntry, &StkMapRecord)>,
msm: &mut ModuleStateMap,
) {
#[derive(Clone, Debug)]
enum RuntimeOrConstant {
Runtime(MachineValue),
Constant(u64),
}
let func_base_addr = (size_record.function_address as usize)
.checked_sub(code_addr)
.unwrap();

39
lib/llvm-backend/src/structs.rs Normal file
View File

@ -0,0 +1,39 @@
use libc::c_char;
use wasmer_runtime_core::vm;
#[repr(C)]
pub struct LLVMModule {
_private: [u8; 0],
}
#[allow(non_camel_case_types, dead_code)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub enum MemProtect {
NONE,
READ,
READ_WRITE,
READ_EXECUTE,
}
#[allow(non_camel_case_types, dead_code)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub enum LLVMResult {
OK,
ALLOCATE_FAILURE,
PROTECT_FAILURE,
DEALLOC_FAILURE,
OBJECT_LOAD_FAILURE,
}
#[repr(C)]
pub struct Callbacks {
pub alloc_memory: extern "C" fn(usize, MemProtect, &mut *mut u8, &mut usize) -> LLVMResult,
pub protect_memory: extern "C" fn(*mut u8, usize, MemProtect) -> LLVMResult,
pub dealloc_memory: extern "C" fn(*mut u8, usize) -> LLVMResult,
pub lookup_vm_symbol: extern "C" fn(*const c_char, usize) -> *const vm::Func,
pub visit_fde: extern "C" fn(*mut u8, usize, extern "C" fn(*mut u8)),
}

8
lib/llvm-backend/src/trampolines.rs
View File

@ -72,12 +72,14 @@ fn generate_trampoline(
Type::I64 => intrinsics.i64_ptr_ty,
Type::F32 => intrinsics.f32_ptr_ty,
Type::F64 => intrinsics.f64_ptr_ty,
Type::V128 => intrinsics.i128_ptr_ty,
};
let mut args_vec = Vec::with_capacity(func_sig.params().len() + 1);
args_vec.push(vmctx_ptr);
for (i, param_ty) in func_sig.params().iter().enumerate() {
let mut i = 0;
for param_ty in func_sig.params().iter() {
let index = intrinsics.i32_ty.const_int(i as _, false);
let item_pointer = unsafe { builder.build_in_bounds_gep(args_ptr, &[index], "arg_ptr") };
@ -88,6 +90,10 @@ fn generate_trampoline(
let arg = builder.build_load(typed_item_pointer, "arg");
args_vec.push(arg);
i = i + 1;
if *param_ty == Type::V128 {
i = i + 1;
}
}
let call_site = builder.build_call(func_ptr, &args_vec, "call");