[OCaml] META: remove exists_if(toplevel).

[oota-llvm.git] / bindings / python / llvm / disassembler.py

diff --git a/bindings/python/llvm/disassembler.py b/bindings/python/llvm/disassembler.py
index dcef9ac269058cb8c59dda3e3bd6d9f81289ef8a..f2df275bf4a0969cb8bc741919817495deee261c 100644 (file)
--- a/bindings/python/llvm/disassembler.py
+++ b/bindings/python/llvm/disassembler.py
@@ -10,7 +10,6 @@
 from ctypes import CFUNCTYPE
 from ctypes import POINTER
 from ctypes import addressof
-from ctypes import byref
 from ctypes import c_byte
 from ctypes import c_char_p
 from ctypes import c_int
@@ -34,6 +33,29 @@ callbacks = {}
 # Constants for set_options
 Option_UseMarkup = 1
 
+
+
+_initialized = False
+_targets = ['AArch64', 'ARM', 'Hexagon', 'MSP430', 'Mips', 'NVPTX', 'PowerPC', 'R600', 'Sparc', 'SystemZ', 'X86', 'XCore']
+def _ensure_initialized():
+    global _initialized
+    if not _initialized:
+        # Here one would want to call the functions
+        # LLVMInitializeAll{TargetInfo,TargetMC,Disassembler}s, but
+        # unfortunately they are only defined as static inline
+        # functions in the header files of llvm-c, so they don't exist
+        # as symbols in the shared library.
+        # So until that is fixed use this hack to initialize them all
+        for tgt in _targets:
+            for initializer in ("TargetInfo", "TargetMC", "Disassembler"):
+                try:
+                    f = getattr(lib, "LLVMInitialize" + tgt + initializer)
+                except AttributeError:
+                    continue
+                f()
+        _initialized = True
+
+
 class Disassembler(LLVMObject):
     """Represents a disassembler instance.
 
@@ -48,9 +70,12 @@ class Disassembler(LLVMObject):
         The triple argument is the triple to create the disassembler for. This
         is something like 'i386-apple-darwin9'.
         """
+
+        _ensure_initialized()
+
         ptr = lib.LLVMCreateDisasm(c_char_p(triple), c_void_p(None), c_int(0),
                 callbacks['op_info'](0), callbacks['symbol_lookup'](0))
-        if not ptr.contents:
+        if not ptr:
             raise Exception('Could not obtain disassembler for triple: %s' %
                             triple)