compiler-rt/lib/orc/resolve.cpp

   1 //===- resolve.cpp --------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains a generic "resolver" function compatible with the
  10 // __orc_rt_reenter function.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "executor_symbol_def.h"
  15 #include "jit_dispatch.h"
  16 #include "wrapper_function_utils.h"
  17
  18 #include <stdio.h>
  19
  20 #define DEBUG_TYPE "resolve"
  21
  22 using namespace orc_rt;
  23
  24 // Declare function tags for functions in the JIT process.
  25 ORC_RT_JIT_DISPATCH_TAG(__orc_rt_resolve_tag)
  26
  27 // FIXME: Make this configurable via an alias.
  28 static void __orc_rt_resolve_fail(void *Caller, const char *ErrMsg) {
  29   fprintf(stderr, "error resolving implementation for stub %p: %s\n", Caller,
  30           ErrMsg);
  31   abort();
  32 }
  33
  34 extern "C" ORC_RT_HIDDEN void *__orc_rt_resolve(void *Caller) {
  35   Expected<ExecutorSymbolDef> Result((ExecutorSymbolDef()));
  36   if (auto Err = WrapperFunction<SPSExpected<SPSExecutorSymbolDef>(
  37           SPSExecutorAddr)>::call(JITDispatch(&__orc_rt_resolve_tag), Result,
  38                                   ExecutorAddr::fromPtr(Caller))) {
  39     __orc_rt_resolve_fail(Caller, toString(std::move(Err)).c_str());
  40     return nullptr; // Unreachable.
  41   }
  42
  43   if (!Result) {
  44     __orc_rt_resolve_fail(Caller, toString(Result.takeError()).c_str());
  45     return nullptr; // Unreachable.
  46   }
  47
  48   return Result->getAddress().toPtr<void *>();
  49 }