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-rw-r--r--js/src/new-regexp/regexp-macro-assembler.cc344
1 files changed, 0 insertions, 344 deletions
diff --git a/js/src/new-regexp/regexp-macro-assembler.cc b/js/src/new-regexp/regexp-macro-assembler.cc
deleted file mode 100644
index 52c1cb1ba..000000000
--- a/js/src/new-regexp/regexp-macro-assembler.cc
+++ /dev/null
@@ -1,344 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "new-regexp/regexp-macro-assembler.h"
-
-#include "new-regexp/regexp-stack.h"
-
-#ifdef V8_INTL_SUPPORT
-#include "unicode/uchar.h"
-#include "unicode/unistr.h"
-#endif // V8_INTL_SUPPORT
-
-namespace v8 {
-namespace internal {
-
-RegExpMacroAssembler::RegExpMacroAssembler(Isolate* isolate, Zone* zone)
- : slow_safe_compiler_(false),
- global_mode_(NOT_GLOBAL),
- isolate_(isolate),
- zone_(zone) {}
-
-RegExpMacroAssembler::~RegExpMacroAssembler() = default;
-
-int RegExpMacroAssembler::CaseInsensitiveCompareUC16(Address byte_offset1,
- Address byte_offset2,
- size_t byte_length,
- Isolate* isolate) {
- // This function is not allowed to cause a garbage collection.
- // A GC might move the calling generated code and invalidate the
- // return address on the stack.
- DCHECK_EQ(0, byte_length % 2);
-
-#ifdef V8_INTL_SUPPORT
- int32_t length = (int32_t)(byte_length >> 1);
- icu::UnicodeString uni_str_1(reinterpret_cast<const char16_t*>(byte_offset1),
- length);
- return uni_str_1.caseCompare(reinterpret_cast<const char16_t*>(byte_offset2),
- length, U_FOLD_CASE_DEFAULT) == 0;
-#else
- uc16* substring1 = reinterpret_cast<uc16*>(byte_offset1);
- uc16* substring2 = reinterpret_cast<uc16*>(byte_offset2);
- size_t length = byte_length >> 1;
- DCHECK_NOT_NULL(isolate);
- unibrow::Mapping<unibrow::Ecma262Canonicalize>* canonicalize =
- isolate->regexp_macro_assembler_canonicalize();
- for (size_t i = 0; i < length; i++) {
- unibrow::uchar c1 = substring1[i];
- unibrow::uchar c2 = substring2[i];
- if (c1 != c2) {
- unibrow::uchar s1[1] = {c1};
- canonicalize->get(c1, '\0', s1);
- if (s1[0] != c2) {
- unibrow::uchar s2[1] = {c2};
- canonicalize->get(c2, '\0', s2);
- if (s1[0] != s2[0]) {
- return 0;
- }
- }
- }
- }
- return 1;
-#endif // V8_INTL_SUPPORT
-}
-
-
-void RegExpMacroAssembler::CheckNotInSurrogatePair(int cp_offset,
- Label* on_failure) {
- Label ok;
- // Check that current character is not a trail surrogate.
- LoadCurrentCharacter(cp_offset, &ok);
- CheckCharacterNotInRange(kTrailSurrogateStart, kTrailSurrogateEnd, &ok);
- // Check that previous character is not a lead surrogate.
- LoadCurrentCharacter(cp_offset - 1, &ok);
- CheckCharacterInRange(kLeadSurrogateStart, kLeadSurrogateEnd, on_failure);
- Bind(&ok);
-}
-
-void RegExpMacroAssembler::CheckPosition(int cp_offset,
- Label* on_outside_input) {
- LoadCurrentCharacter(cp_offset, on_outside_input, true);
-}
-
-void RegExpMacroAssembler::LoadCurrentCharacter(int cp_offset,
- Label* on_end_of_input,
- bool check_bounds,
- int characters,
- int eats_at_least) {
- // By default, eats_at_least = characters.
- if (eats_at_least == kUseCharactersValue) {
- eats_at_least = characters;
- }
-
- LoadCurrentCharacterImpl(cp_offset, on_end_of_input, check_bounds, characters,
- eats_at_least);
-}
-
-bool RegExpMacroAssembler::CheckSpecialCharacterClass(uc16 type,
- Label* on_no_match) {
- return false;
-}
-
-NativeRegExpMacroAssembler::NativeRegExpMacroAssembler(Isolate* isolate,
- Zone* zone)
- : RegExpMacroAssembler(isolate, zone) {}
-
-NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() = default;
-
-bool NativeRegExpMacroAssembler::CanReadUnaligned() {
- return FLAG_enable_regexp_unaligned_accesses && !slow_safe();
-}
-
-#ifndef COMPILING_IRREGEXP_FOR_EXTERNAL_EMBEDDER
-
-// This method may only be called after an interrupt.
-int NativeRegExpMacroAssembler::CheckStackGuardState(
- Isolate* isolate, int start_index, RegExp::CallOrigin call_origin,
- Address* return_address, Code re_code, Address* subject,
- const byte** input_start, const byte** input_end) {
- DisallowHeapAllocation no_gc;
- Address old_pc = PointerAuthentication::AuthenticatePC(return_address, 0);
- DCHECK_LE(re_code.raw_instruction_start(), old_pc);
- DCHECK_LE(old_pc, re_code.raw_instruction_end());
-
- StackLimitCheck check(isolate);
- bool js_has_overflowed = check.JsHasOverflowed();
-
- if (call_origin == RegExp::CallOrigin::kFromJs) {
- // Direct calls from JavaScript can be interrupted in two ways:
- // 1. A real stack overflow, in which case we let the caller throw the
- // exception.
- // 2. The stack guard was used to interrupt execution for another purpose,
- // forcing the call through the runtime system.
-
- // Bug(v8:9540) Investigate why this method is called from JS although no
- // stackoverflow or interrupt is pending on ARM64. We return 0 in this case
- // to continue execution normally.
- if (js_has_overflowed) {
- return EXCEPTION;
- } else if (check.InterruptRequested()) {
- return RETRY;
- } else {
- return 0;
- }
- }
- DCHECK(call_origin == RegExp::CallOrigin::kFromRuntime);
-
- // Prepare for possible GC.
- HandleScope handles(isolate);
- Handle<Code> code_handle(re_code, isolate);
- Handle<String> subject_handle(String::cast(Object(*subject)), isolate);
- bool is_one_byte = String::IsOneByteRepresentationUnderneath(*subject_handle);
- int return_value = 0;
-
- if (js_has_overflowed) {
- AllowHeapAllocation yes_gc;
- isolate->StackOverflow();
- return_value = EXCEPTION;
- } else if (check.InterruptRequested()) {
- AllowHeapAllocation yes_gc;
- Object result = isolate->stack_guard()->HandleInterrupts();
- if (result.IsException(isolate)) return_value = EXCEPTION;
- }
-
- if (*code_handle != re_code) { // Return address no longer valid
- // Overwrite the return address on the stack.
- intptr_t delta = code_handle->address() - re_code.address();
- Address new_pc = old_pc + delta;
- // TODO(v8:10026): avoid replacing a signed pointer.
- PointerAuthentication::ReplacePC(return_address, new_pc, 0);
- }
-
- // If we continue, we need to update the subject string addresses.
- if (return_value == 0) {
- // String encoding might have changed.
- if (String::IsOneByteRepresentationUnderneath(*subject_handle) !=
- is_one_byte) {
- // If we changed between an LATIN1 and an UC16 string, the specialized
- // code cannot be used, and we need to restart regexp matching from
- // scratch (including, potentially, compiling a new version of the code).
- return_value = RETRY;
- } else {
- *subject = subject_handle->ptr();
- intptr_t byte_length = *input_end - *input_start;
- *input_start = subject_handle->AddressOfCharacterAt(start_index, no_gc);
- *input_end = *input_start + byte_length;
- }
- }
- return return_value;
-}
-
-// Returns a {Result} sentinel, or the number of successful matches.
-int NativeRegExpMacroAssembler::Match(Handle<JSRegExp> regexp,
- Handle<String> subject,
- int* offsets_vector,
- int offsets_vector_length,
- int previous_index, Isolate* isolate) {
- DCHECK(subject->IsFlat());
- DCHECK_LE(0, previous_index);
- DCHECK_LE(previous_index, subject->length());
-
- // No allocations before calling the regexp, but we can't use
- // DisallowHeapAllocation, since regexps might be preempted, and another
- // thread might do allocation anyway.
-
- String subject_ptr = *subject;
- // Character offsets into string.
- int start_offset = previous_index;
- int char_length = subject_ptr.length() - start_offset;
- int slice_offset = 0;
-
- // The string has been flattened, so if it is a cons string it contains the
- // full string in the first part.
- if (StringShape(subject_ptr).IsCons()) {
- DCHECK_EQ(0, ConsString::cast(subject_ptr).second().length());
- subject_ptr = ConsString::cast(subject_ptr).first();
- } else if (StringShape(subject_ptr).IsSliced()) {
- SlicedString slice = SlicedString::cast(subject_ptr);
- subject_ptr = slice.parent();
- slice_offset = slice.offset();
- }
- if (StringShape(subject_ptr).IsThin()) {
- subject_ptr = ThinString::cast(subject_ptr).actual();
- }
- // Ensure that an underlying string has the same representation.
- bool is_one_byte = subject_ptr.IsOneByteRepresentation();
- DCHECK(subject_ptr.IsExternalString() || subject_ptr.IsSeqString());
- // String is now either Sequential or External
- int char_size_shift = is_one_byte ? 0 : 1;
-
- DisallowHeapAllocation no_gc;
- const byte* input_start =
- subject_ptr.AddressOfCharacterAt(start_offset + slice_offset, no_gc);
- int byte_length = char_length << char_size_shift;
- const byte* input_end = input_start + byte_length;
- return Execute(*subject, start_offset, input_start, input_end, offsets_vector,
- offsets_vector_length, isolate, *regexp);
-}
-
-// Returns a {Result} sentinel, or the number of successful matches.
-// TODO(pthier): The JSRegExp object is passed to native irregexp code to match
-// the signature of the interpreter. We should get rid of JS objects passed to
-// internal methods.
-int NativeRegExpMacroAssembler::Execute(
- String input, // This needs to be the unpacked (sliced, cons) string.
- int start_offset, const byte* input_start, const byte* input_end,
- int* output, int output_size, Isolate* isolate, JSRegExp regexp) {
- // Ensure that the minimum stack has been allocated.
- RegExpStackScope stack_scope(isolate);
- Address stack_base = stack_scope.stack()->stack_base();
-
- bool is_one_byte = String::IsOneByteRepresentationUnderneath(input);
- Code code = Code::cast(regexp.Code(is_one_byte));
- RegExp::CallOrigin call_origin = RegExp::CallOrigin::kFromRuntime;
-
- using RegexpMatcherSig = int(
- Address input_string, int start_offset, // NOLINT(readability/casting)
- const byte* input_start, const byte* input_end, int* output,
- int output_size, Address stack_base, int call_origin, Isolate* isolate,
- Address regexp);
-
- auto fn = GeneratedCode<RegexpMatcherSig>::FromCode(code);
- int result =
- fn.Call(input.ptr(), start_offset, input_start, input_end, output,
- output_size, stack_base, call_origin, isolate, regexp.ptr());
- DCHECK(result >= RETRY);
-
- if (result == EXCEPTION && !isolate->has_pending_exception()) {
- // We detected a stack overflow (on the backtrack stack) in RegExp code,
- // but haven't created the exception yet. Additionally, we allow heap
- // allocation because even though it invalidates {input_start} and
- // {input_end}, we are about to return anyway.
- AllowHeapAllocation allow_allocation;
- isolate->StackOverflow();
- }
- return result;
-}
-
-#endif // !COMPILING_IRREGEXP_FOR_EXTERNAL_EMBEDDER
-
-// clang-format off
-const byte NativeRegExpMacroAssembler::word_character_map[] = {
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
-
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // '0' - '7'
- 0xFFu, 0xFFu, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, // '8' - '9'
-
- 0x00u, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'A' - 'G'
- 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'H' - 'O'
- 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'P' - 'W'
- 0xFFu, 0xFFu, 0xFFu, 0x00u, 0x00u, 0x00u, 0x00u, 0xFFu, // 'X' - 'Z', '_'
-
- 0x00u, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'a' - 'g'
- 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'h' - 'o'
- 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, 0xFFu, // 'p' - 'w'
- 0xFFu, 0xFFu, 0xFFu, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, // 'x' - 'z'
- // Latin-1 range
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
-
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
-
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
-
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
- 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x00u,
-};
-// clang-format on
-
-Address NativeRegExpMacroAssembler::GrowStack(Address stack_pointer,
- Address* stack_base,
- Isolate* isolate) {
- RegExpStack* regexp_stack = isolate->regexp_stack();
- size_t size = regexp_stack->stack_capacity();
- Address old_stack_base = regexp_stack->stack_base();
- DCHECK(old_stack_base == *stack_base);
- DCHECK(stack_pointer <= old_stack_base);
- DCHECK(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
- Address new_stack_base = regexp_stack->EnsureCapacity(size * 2);
- if (new_stack_base == kNullAddress) {
- return kNullAddress;
- }
- *stack_base = new_stack_base;
- intptr_t stack_content_size = old_stack_base - stack_pointer;
- return new_stack_base - stack_content_size;
-}
-
-} // namespace internal
-} // namespace v8
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