1 /*===-- bitwriter_ocaml.c - LLVM Ocaml Glue ---------------------*- C++ -*-===*\
2 |* *|
3 |* The LLVM Compiler Infrastructure *|
4 |* *|
5 |* This file is distributed under the University of Illinois Open Source *|
6 |* License. See LICENSE.TXT for details. *|
7 |* *|
8 |*===----------------------------------------------------------------------===*|
9 |* *|
10 |* This file glues LLVM's ocaml interface to its C interface. These functions *|
11 |* are by and large transparent wrappers to the corresponding C functions. *|
12 |* *|
13 \*===----------------------------------------------------------------------===*/
14
15 #include "llvm-c/BitReader.h"
16 #include "caml/alloc.h"
17 #include "caml/fail.h"
18 #include "caml/memory.h"
19
20
21 /* Can't use the recommended caml_named_value mechanism for backwards
22 compatibility reasons. This is largely equivalent. */
23 static value llvm_bitreader_error_exn;
24
llvm_register_bitreader_exns(value Error)25 CAMLprim value llvm_register_bitreader_exns(value Error) {
26 llvm_bitreader_error_exn = Field(Error, 0);
27 register_global_root(&llvm_bitreader_error_exn);
28 return Val_unit;
29 }
30
llvm_raise(value Prototype,char * Message)31 static void llvm_raise(value Prototype, char *Message) {
32 CAMLparam1(Prototype);
33 CAMLlocal1(CamlMessage);
34
35 CamlMessage = copy_string(Message);
36 LLVMDisposeMessage(Message);
37
38 raise_with_arg(Prototype, CamlMessage);
39 abort(); /* NOTREACHED */
40 #ifdef CAMLnoreturn
41 CAMLnoreturn; /* Silences warnings, but is missing in some versions. */
42 #endif
43 }
44
45
46 /*===-- Modules -----------------------------------------------------------===*/
47
48 /* Llvm.llcontext -> Llvm.llmemorybuffer -> Llvm.llmodule */
llvm_get_module(LLVMContextRef C,LLVMMemoryBufferRef MemBuf)49 CAMLprim value llvm_get_module(LLVMContextRef C, LLVMMemoryBufferRef MemBuf) {
50 CAMLparam0();
51 CAMLlocal2(Variant, MessageVal);
52 char *Message;
53
54 LLVMModuleRef M;
55 if (LLVMGetBitcodeModuleInContext(C, MemBuf, &M, &Message))
56 llvm_raise(llvm_bitreader_error_exn, Message);
57
58 CAMLreturn((value) M);
59 }
60
61 /* Llvm.llcontext -> Llvm.llmemorybuffer -> Llvm.llmodule */
llvm_parse_bitcode(LLVMContextRef C,LLVMMemoryBufferRef MemBuf)62 CAMLprim value llvm_parse_bitcode(LLVMContextRef C,
63 LLVMMemoryBufferRef MemBuf) {
64 CAMLparam0();
65 CAMLlocal2(Variant, MessageVal);
66 LLVMModuleRef M;
67 char *Message;
68
69 if (LLVMParseBitcodeInContext(C, MemBuf, &M, &Message))
70 llvm_raise(llvm_bitreader_error_exn, Message);
71
72 CAMLreturn((value) M);
73 }
74