jit: Add custom memory manager (still segfaulting)

Author: z0w0

mk/libuv/ia32/win/src/libuv/uv.target.mk.bak

@@ -160,14 +160,37 @@ mod write {
                 llvm::LLVMAddCFGSimplificationPass(pm.llpm);*/
 
                 // JIT execution takes ownership of the module,
-                // so don't dispose and return.
+                // so don't dispose and return. Due to a weird bug
+                // with dynamic libraries, we need to separate jitting
+                // into two functions and load crates inbetween.
+
+                if !llvm::LLVMRustPrepareJIT(pm.llpm,
+                                             llmod,
+                                             CodeGenOptLevel,
+                                             true) {
+                    llvm_err(sess, ~"Could not JIT");
+                }
+
+                // We need to tell LLVM where to resolve all linked
+                // symbols from. The equivalent of -lstd, -lcore, etc.
+                /*let cstore = sess.cstore;
+                for cstore::get_used_crate_files(cstore).each |cratepath| {
+                    debug!{"linking: %s", cratepath};
+
+                    let _: () = str::as_c_str(
+                        cratepath,
+                        |buf_t| {
+                            if !llvm::LLVMRustLoadLibrary(buf_t) {
+                                llvm_err(sess, ~"Could not link");
+                            }
+                            debug!{"linked: %s", cratepath};
+                        });
+                }*/
 
-                if !llvm::LLVMRustJIT(pm.llpm,
-                                      llmod,
-                                      CodeGenOptLevel,
-                                      true) {
+                if !llvm::LLVMRustExecuteJIT() {
                     llvm_err(sess, ~"Could not JIT");
                 }
+
                 if sess.time_llvm_passes() { llvm::LLVMRustPrintPassTimings(); }
                 return;
             }

src/rustc/back/link.rs

@@ -986,12 +986,18 @@ extern mod llvm {
         call. */
     fn LLVMRustGetLastError() -> *c_char;
 
-    /** JIT the module. **/
-    fn LLVMRustJIT(PM: PassManagerRef,
+    /** Load a shared library to resolve symbols against. */
+    fn LLVMRustLoadLibrary(Filename: *c_char) -> bool;
+
+    /** Create the JIT engine. */
+    fn LLVMRustPrepareJIT(PM: PassManagerRef,
                    M: ModuleRef,
                    OptLevel: c_int,
                    EnableSegmentedStacks: bool) -> bool;
 
+    /** Execute the JIT engine. */
+    fn LLVMRustExecuteJIT() -> bool;
+
     /** Parses the bitcode in the given memory buffer. */
     fn LLVMRustParseBitcode(MemBuf: MemoryBufferRef) -> ModuleRef;