Hopefully finish the memory manager implementation for llvm RuntimeDyLd

Cargo.lock

@@ -63,7 +63,7 @@ dependencies = [
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashbrown 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -136,7 +136,7 @@ name = "cexpr"
 version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "nom 4.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nom 4.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -269,7 +269,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dlopen_derive 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -431,7 +431,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "inkwell"
 version = "0.1.0"
-source = "git+https://github.com/TheDan64/inkwell?branch=llvm7-0#e66f8941061a45299ef73533c747c32bcd5d696a"
+source = "git+https://github.com/TheDan64/inkwell?branch=llvm7-0#b8699b0ee594e4162ce850fbedb37892e9cdb7e4"
 dependencies = [
  "either 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "enum-methods 0.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -443,7 +443,7 @@ dependencies = [
 [[package]]
 name = "inkwell_internal_macros"
 version = "0.1.0"
-source = "git+https://github.com/TheDan64/inkwell?branch=llvm7-0#e66f8941061a45299ef73533c747c32bcd5d696a"
+source = "git+https://github.com/TheDan64/inkwell?branch=llvm7-0#b8699b0ee594e4162ce850fbedb37892e9cdb7e4"
 dependencies = [
  "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -465,13 +465,13 @@ dependencies = [
 
 [[package]]
 name = "lazy_static"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
 version = "0.2.49"
-source = "git+https://github.com/rust-lang/libc#68701e7e673da580de8ba6197c544316bd38e84a"
+source = "git+https://github.com/rust-lang/libc#b905aef34008c962ef8a4410216eae65bbb7f68f"
 
 [[package]]
 name = "libc"
@@ -496,7 +496,7 @@ dependencies = [
  "goblin 0.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashbrown 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "inkwell 0.1.0 (git+https://github.com/TheDan64/inkwell?branch=llvm7-0)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -512,7 +512,7 @@ version = "70.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -575,7 +575,7 @@ dependencies = [
 
 [[package]]
 name = "nom"
-version = "4.2.0"
+version = "4.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -691,7 +691,7 @@ dependencies = [
  "rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_jitter 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_os 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -759,11 +759,11 @@ dependencies = [
 
 [[package]]
 name = "rand_pcg"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -907,7 +907,7 @@ dependencies = [
 
 [[package]]
 name = "serde_bytes"
-version = "0.10.4"
+version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1082,7 +1082,7 @@ name = "thread_local"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1201,7 +1201,7 @@ dependencies = [
  "nix 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde-bench 0.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_bytes 0.10.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.58 (registry+https://github.com/rust-lang/crates.io-index)",
  "target-lexicon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasmer-runtime-core 0.1.2",
@@ -1216,7 +1216,7 @@ version = "0.1.0"
 dependencies = [
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (git+https://github.com/rust-lang/libc)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1229,7 +1229,7 @@ dependencies = [
 name = "wasmer-runtime"
 version = "0.1.4"
 dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memmap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasmer-clif-backend 0.1.2",
  "wasmer-runtime-core 0.1.2",
@@ -1254,14 +1254,14 @@ dependencies = [
  "hashbrown 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "page_size 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde-bench 0.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_bytes 0.10.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.58 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasmer-clif-backend 0.1.2",
@@ -1415,7 +1415,7 @@ dependencies = [
 "checksum inkwell_internal_macros 0.1.0 (git+https://github.com/TheDan64/inkwell?branch=llvm7-0)" = "<none>"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a374c89b9db55895453a74c1e38861d9deec0b01b405a82516e9d5de4820dea1"
+"checksum lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"
 "checksum libc 0.2.49 (git+https://github.com/rust-lang/libc)" = "<none>"
 "checksum libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)" = "413f3dfc802c5dc91dc570b05125b6cda9855edfaa9825c9849807876376e70e"
 "checksum libloading 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9c3ad660d7cb8c5822cd83d10897b0f1f1526792737a179e73896152f85b88c2"
@@ -1426,7 +1426,7 @@ dependencies = [
 "checksum memmap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6585fd95e7bb50d6cc31e20d4cf9afb4e2ba16c5846fc76793f11218da9c475b"
 "checksum nix 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "921f61dc817b379d0834e45d5ec45beaacfae97082090a49c2cf30dcbc30206f"
 "checksum nix 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46f0f3210768d796e8fa79ec70ee6af172dacbe7147f5e69be5240a47778302b"
-"checksum nom 4.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b30adc557058ce00c9d0d7cb3c6e0b5bc6f36e2e2eabe74b0ba726d194abd588"
+"checksum nom 4.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4836e9d6036552017e107edc598c97b2dee245161ff1b1ad4af215004774b354"
 "checksum opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "93f5bb2e8e8dec81642920ccff6b61f1eb94fa3020c5a325c9851ff604152409"
 "checksum owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "49a4b8ea2179e6a2e27411d3bca09ca6dd630821cf6894c6c7c8467a8ee7ef13"
 "checksum page_size 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f89ef58b3d32420dbd1a43d2f38ae92f6239ef12bb556ab09ca55445f5a67242"
@@ -1448,7 +1448,7 @@ dependencies = [
 "checksum rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
 "checksum rand_jitter 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b9ea758282efe12823e0d952ddb269d2e1897227e464919a554f2a03ef1b832"
 "checksum rand_os 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b7c690732391ae0abafced5015ffb53656abfaec61b342290e5eb56b286a679d"
-"checksum rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "086bd09a33c7044e56bb44d5bdde5a60e7f119a9e95b0775f545de759a32fe05"
+"checksum rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
 "checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
 "checksum raw-cpuid 6.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "30a9d219c32c9132f7be513c18be77c9881c7107d2ab5569d205a6a0f0e6dc7d"
 "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
@@ -1467,7 +1467,7 @@ dependencies = [
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)" = "9f301d728f2b94c9a7691c90f07b0b4e8a4517181d9461be94c04bddeb4bd850"
 "checksum serde-bench 0.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "d733da87e79faaac25616e33d26299a41143fd4cd42746cbb0e91d8feea243fd"
-"checksum serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)" = "adb6e51a6b3696b301bc221d785f898b4457c619b51d7ce195a6d20baecb37b3"
+"checksum serde_bytes 0.10.5 (registry+https://github.com/rust-lang/crates.io-index)" = "defbb8a83d7f34cc8380751eeb892b825944222888aff18996ea7901f24aec88"
 "checksum serde_derive 1.0.58 (registry+https://github.com/rust-lang/crates.io-index)" = "ac38f51a52a556cd17545798e29536885fb1a3fa63d6399f5ef650f4a7d35901"
 "checksum serde_json 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)" = "27dce848e7467aa0e2fcaf0a413641499c0b745452aaca1194d24dedde9e13c9"
 "checksum sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7b4d8bfd0e469f417657573d8451fb33d16cfe0989359b93baf3a1ffc639543d"

lib/llvm-backend/build.rs

@@ -49,6 +49,7 @@ lazy_static! {
             use std::io::Read;
             let mut s = String::new();
             file.read_to_string(&mut s).unwrap();
+            s.truncate(s.len() - 4);
             Some(s)
         } else {
             None

lib/llvm-backend/cpp/object_loader.cpp

@@ -1,19 +1,35 @@
 #include "object_loader.hh"
 #include <llvm/ExecutionEngine/RuntimeDyld.h>
 #include <iostream>
+#include <memory>
 
-class MemoryManager : llvm::RuntimeDyld::MemoryManager {
+struct MemoryManager : llvm::RuntimeDyld::MemoryManager {
 public:
-    MemoryManager() {}
+    MemoryManager(callbacks_t *callbacks) : callbacks(callbacks) {}
 
-    virtual ~MemoryManager() {}
+    virtual ~MemoryManager() {
-
+        // Deallocate all of the allocated memory.
-    virtual uint8_t* allocateCodeSection(uintptr_t Size, unsigned Alignment, unsigned SectionID, llvm::StringRef SectionName) override {
+        callbacks->dealloc_memory(code_section.base, code_section.size);
-        return nullptr;
+        callbacks->dealloc_memory(read_section.base, read_section.size);
+        callbacks->dealloc_memory(readwrite_section.base, readwrite_section.size);
     }
 
-    virtual uint8_t* allocateDataSection(uintptr_t Size, unsigned Alignment, unsigned SectionID, llvm::StringRef SectionName, bool isReadOnly) override {
+    virtual uint8_t* allocateCodeSection(uintptr_t size, unsigned alignment, unsigned section_id, llvm::StringRef section_name) override {
-        return nullptr;
+        std::cout << "code section name: " << (std::string)section_name << std::endl;
+        
+        return allocate_bump(code_section, code_bump_ptr, size, alignment);
+    }
+
+    virtual uint8_t* allocateDataSection(uintptr_t size, unsigned alignment, unsigned section_id, llvm::StringRef section_name, bool read_only) override {
+        std::cout << "data section name: " << (std::string)section_name << std::endl;
+        
+        // Allocate from the read-only section or the read-write section, depending on if this allocation
+        // should be read-only or not.
+        if (read_only) {
+            return allocate_bump(read_section, read_bump_ptr, size, alignment);
+        } else {
+            return allocate_bump(readwrite_section, readwrite_bump_ptr, size, alignment);
+        }
     }
 
     virtual void reserveAllocationSpace(
@@ -24,7 +40,20 @@ public:
         uintptr_t read_write_data_size,
         uint32_t read_write_data_align
     ) override {
-        
+        uint8_t *ptr_out = nullptr;
+        size_t size_out = 0;
+
+        auto code_result = callbacks->alloc_memory(code_size, PROTECT_READ_WRITE, &ptr_out, &size_out);
+        code_section = Section { ptr_out, size_out };
+        code_bump_ptr = (uintptr_t)ptr_out;
+
+        auto read_result = callbacks->alloc_memory(read_data_size, PROTECT_READ_WRITE, &ptr_out, &size_out);
+        read_section = Section { ptr_out, size_out };
+        read_bump_ptr = (uintptr_t)ptr_out;
+
+        auto readwrite_result = callbacks->alloc_memory(read_write_data_size, PROTECT_READ_WRITE, &ptr_out, &size_out);
+        readwrite_section = Section { ptr_out, size_out };
+        readwrite_bump_ptr = (uintptr_t)ptr_out;
     }
 
     /* Turn on the `reserveAllocationSpace` callback. */
@@ -33,38 +62,59 @@ public:
     }
 
     virtual void registerEHFrames(uint8_t* Addr, uint64_t LoadAddr, size_t Size) override {
-
+        std::cout << "should register eh frames" << std::endl;
     }
 
     virtual void deregisterEHFrames() override {
-
+        std::cout << "should deregister eh frames" << std::endl;
     }
 
     virtual bool finalizeMemory(std::string *ErrMsg = nullptr) override {
-        
+        auto code_result = callbacks->protect_memory(code_section.base, code_section.size, mem_protect_t::PROTECT_READ_EXECUTE);
+        if (code_result != RESULT_OK) {
+            return false;
+        }
+
+        auto read_result = callbacks->protect_memory(read_section.base, read_section.size, mem_protect_t::PROTECT_READ);
+        if (read_result != RESULT_OK) {
+            return false;
+        }
+
+        // The readwrite section is already mapped as read-write.
 
         return false;
     }
 
-    virtual void notifyObjectLoaded(llvm::RuntimeDyld &RTDyld, const llvm::object::ObjectFile &Obj) override {
+    virtual void notifyObjectLoaded(llvm::RuntimeDyld &RTDyld, const llvm::object::ObjectFile &Obj) override {}
-        
-    }
 private:
     struct Section {
         uint8_t* base;
-        size_t num_pages;
+        size_t size;
-        size_t num_commited_bytes;
     };
 
-    uint8_t *image_base;
+    uint8_t* allocate_bump(Section& section, uintptr_t& bump_ptr, size_t size, size_t align) {
-    size_t num_allocated_pages;
+        auto aligner = [](uintptr_t& ptr, size_t align) {
+            ptr = (ptr + align - 1) & ~(align - 1);
+        };
+
+        // Align the bump pointer to the requires alignment.
+        aligner(bump_ptr, align);
+
+        auto ret_ptr = bump_ptr;
+        bump_ptr += size;
+
+        assert(bump_ptr <= (uintptr_t)section.base + section.size);
+
+        return (uint8_t*)ret_ptr;
+    }
 
     Section code_section, read_section, readwrite_section;
+    uintptr_t code_bump_ptr, read_bump_ptr, readwrite_bump_ptr;
 
-
+    callbacks_t *callbacks;
 };
 
-class SymbolLookup : llvm::JITSymbolResolver {
+struct SymbolLookup : llvm::JITSymbolResolver {
 public:
     virtual llvm::Expected<LookupResult> lookup(const LookupSet& symbols) override {
         LookupResult result;
@@ -93,4 +143,34 @@ private:
 
         return llvm::JITEvaluatedSymbol(addr, llvm::JITSymbolFlags::None);
     }
+};
+
+class WasmModule {
+public:
+    WasmModule(
+        const uint8_t *object_start,
+        size_t object_size,
+        callbacks_t *callbacks
+
+    ) : memory_manager(std::unique_ptr<MemoryManager>(new MemoryManager(callbacks))) {
+        object_file = llvm::cantFail(llvm::object::ObjectFile::createObjectFile(llvm::MemoryBufferRef(
+            llvm::StringRef((const char *)object_start, object_size), "object"
+        )));
+
+        SymbolLookup symbol_resolver;
+        llvm::RuntimeDyld loader(*memory_manager, symbol_resolver);
+
+        loader.setProcessAllSections(true);
+
+        auto loaded_object_info = loader.loadObject(*object_file);
+        loader.finalizeWithMemoryManagerLocking();
+
+        assert(!loader.hasError());
+
+        
+
+    }
+private:
+    std::unique_ptr<MemoryManager> memory_manager;
+    std::unique_ptr<llvm::object::ObjectFile> object_file;
 };

lib/llvm-backend/src/code.rs

@@ -616,7 +616,7 @@ fn parse_function(
                             let struct_value = basic_value.into_struct_value();
                             for i in 0..(count as u32) {
                                 let value =
-                                    builder.build_extract_value(struct_value, i, &state.var_name());
+                                    builder.build_extract_value(struct_value, i, &state.var_name()).unwrap();
                                 state.push1(value);
                             }
                         }

lib/llvm-backend/src/platform/mod.rs

@@ -0,0 +1,8 @@
+
+#[cfg(target_family = "unix")]
+mod unix;
+#[cfg(target_family = "unix")]
+pub use self::unix::*;
+
+#[cfg(target_family = "windows")]
+compile_error!("windows not yet supported for the llvm-based compiler backend");

lib/llvm-backend/src/platform/unix/mod.rs

@@ -0,0 +1,40 @@
+
+extern "C" {
+    fn __register_frame(frame: *const u8);
+    fn __deregister_frame(frame: *const u8);
+}
+
+pub unsafe fn register_eh_frames(eh_frames: *const u8, num_bytes: usize) {
+    visit_frame_desc_entries(eh_frames, num_bytes, |frame| __register_frame(frame));
+}
+
+unsafe fn visit_frame_desc_entries<F>(eh_frames: *const u8, num_bytes: usize, visitor: F)
+where
+    F: Fn(*const u8),
+{
+    let mut next = eh_frames;
+    let mut end = eh_frames.add(num_bytes);
+
+    loop {
+        if next >= end {
+            break;
+        }
+
+        let cfi = next;
+        let mut cfi_num_bytes = (next as *const u32).read_unaligned() as u64;
+        assert!(cfi_num_bytes != 0);
+
+        next = next.add(4);
+        if num_bytes == 0xffffffff {
+            let cfi_num_bytes64 = (next as *const u64).read_unaligned();
+            cfi_num_bytes = cfi_num_bytes64;
+            next = next.add(8);
+        }
+
+        let cie_offset = (next as *const u32).read_unaligned();
+        if cie_offset != 0 {
+            visitor(cfi);
+        }
+        next = next.add(cfi_num_bytes as usize);
+    }
+}