1  /*
  2   * Copyright (C) 2020 Apple Inc. All rights reserved.
  3   *
  4   * Redistribution and use in source and binary forms, with or without
  5   * modification, are permitted provided that the following conditions
  6   * are met:
  7   * 1. Redistributions of source code must retain the above copyright
  8   *    notice, this list of conditions and the following disclaimer.
  9   * 2. Redistributions in binary form must reproduce the above copyright
 10   *    notice, this list of conditions and the following disclaimer in the
 11   *    documentation and/or other materials provided with the distribution.
 12   *
 13   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 14   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 15   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 16   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 17   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 18   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 19   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 20   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 21   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 23   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 24   */
 25  
 26  #include "config.h"
 27  #include "JITOperationList.h"
 28  
 29  #include "Gate.h"
 30  #include "LLIntData.h"
 31  #include "Opcode.h"
 32  
 33  #if ENABLE(JIT_CAGE)
 34  #include <WebKitAdditions/JITCageAdditions.h>
 35  #endif
 36  
 37  namespace JSC {
 38  
 39  LazyNeverDestroyed<JITOperationList> jitOperationList;
 40  
 41  #if ENABLE(JIT_OPERATION_VALIDATION)
 42  extern const uintptr_t startOfJITOperationsInJSC __asm("section$start$__DATA_CONST$__jsc_ops");
 43  extern const uintptr_t endOfJITOperationsInJSC __asm("section$end$__DATA_CONST$__jsc_ops");
 44  #endif
 45  
 46  void JITOperationList::initialize()
 47  {
 48      jitOperationList.construct();
 49  }
 50  
 51  #if ENABLE(JIT_OPERATION_VALIDATION)
 52  static SUPPRESS_ASAN ALWAYS_INLINE void addPointers(HashMap<void*, void*>& map, const uintptr_t* beginOperations, const uintptr_t* endOperations)
 53  {
 54  #if ENABLE(JIT_CAGE)
 55      if (Options::useJITCage()) {
 56          JSC_JIT_CAGED_POINTER_REGISTRATION();
 57          return;
 58      }
 59  #endif
 60      if constexpr (ASSERT_ENABLED) {
 61          for (const uintptr_t* current = beginOperations; current != endOperations; ++current) {
 62              void* codePtr = removeCodePtrTag(bitwise_cast<void*>(*current));
 63              if (codePtr)
 64                  map.add(codePtr, WTF::tagNativeCodePtrImpl<OperationPtrTag>(codePtr));
 65          }
 66      }
 67  }
 68  #endif
 69  
 70  void JITOperationList::populatePointersInJavaScriptCore()
 71  {
 72  #if ENABLE(JIT_OPERATION_VALIDATION)
 73      static std::once_flag onceKey;
 74      std::call_once(onceKey, [] {
 75          if (Options::useJIT())
 76              addPointers(jitOperationList->m_validatedOperations, &startOfJITOperationsInJSC, &endOfJITOperationsInJSC);
 77      });
 78  #endif
 79  }
 80  
 81  void JITOperationList::populatePointersInJavaScriptCoreForLLInt()
 82  {
 83  #if ENABLE(JIT_OPERATION_VALIDATION)
 84      static std::once_flag onceKey;
 85      std::call_once(onceKey, [] {
 86  
 87  #define LLINT_OP(name) \
 88      bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(name)), \
 89      bitwise_cast<uintptr_t>(LLInt::getWide16CodeFunctionPtr<CFunctionPtrTag>(name)), \
 90      bitwise_cast<uintptr_t>(LLInt::getWide32CodeFunctionPtr<CFunctionPtrTag>(name)),
 91  
 92  #define LLINT_RETURN_LOCATION(name, ...) \
 93      LLINT_OP(name##_return_location)
 94  
 95          const uintptr_t operations[] = {
 96              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_function_for_call_prologue)),
 97              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_function_for_construct_prologue)),
 98              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_function_for_call_arity_check)),
 99              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_function_for_construct_arity_check)),
100              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_eval_prologue)),
101              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_program_prologue)),
102              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_module_program_prologue)),
103              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(wasm_function_prologue)),
104              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(wasm_function_prologue_no_tls)),
105              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_throw_during_call_trampoline)),
106              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(llint_handle_uncaught_exception)),
107              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(checkpoint_osr_exit_trampoline)),
108              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(checkpoint_osr_exit_from_inlined_call_trampoline)),
109              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(normal_osr_exit_trampoline)),
110              bitwise_cast<uintptr_t>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(fuzzer_return_early_from_loop_hint)),
111  
112              LLINT_OP(op_catch)
113              LLINT_OP(llint_generic_return_point)
114  
115              LLINT_RETURN_LOCATION(op_get_by_id)
116              LLINT_RETURN_LOCATION(op_get_by_val)
117              LLINT_RETURN_LOCATION(op_put_by_id)
118              LLINT_RETURN_LOCATION(op_put_by_val)
119  
120              JSC_JS_GATE_OPCODES(LLINT_RETURN_LOCATION)
121              JSC_WASM_GATE_OPCODES(LLINT_RETURN_LOCATION)
122          };
123          if (Options::useJIT())
124              addPointers(jitOperationList->m_validatedOperations, operations, operations + WTF_ARRAY_LENGTH(operations));
125  #undef LLINT_RETURN_LOCATION
126      });
127  #endif
128  }
129  
130  
131  void JITOperationList::populatePointersInEmbedder(const uintptr_t* beginOperations, const uintptr_t* endOperations)
132  {
133      UNUSED_PARAM(beginOperations);
134      UNUSED_PARAM(endOperations);
135  #if ENABLE(JIT_OPERATION_VALIDATION)
136      if (Options::useJIT())
137          addPointers(jitOperationList->m_validatedOperations, beginOperations, endOperations);
138  #endif
139  }
140  
141  } // namespace JSC