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Diffstat (limited to 'deps/v8/test/cctest/test-hashing.cc')
| -rw-r--r-- | deps/v8/test/cctest/test-hashing.cc | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/deps/v8/test/cctest/test-hashing.cc b/deps/v8/test/cctest/test-hashing.cc new file mode 100644 index 000000000..9c342a9ef --- /dev/null +++ b/deps/v8/test/cctest/test-hashing.cc @@ -0,0 +1,166 @@ +// Copyright 2011 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include <stdlib.h> + +#include "v8.h" + +#include "factory.h" +#include "macro-assembler.h" +#include "cctest.h" +#include "code-stubs.h" +#include "objects.h" + +#ifdef USE_SIMULATOR +#include "simulator.h" +#endif + +using namespace v8::internal; + + +typedef uint32_t (*HASH_FUNCTION)(); + +static v8::Persistent<v8::Context> env; + +#define __ assm-> + + +void generate(MacroAssembler* assm, i::Vector<const char> string) { +#ifdef V8_TARGET_ARCH_IA32 + __ push(ebx); + __ push(ecx); + __ mov(eax, Immediate(0)); + if (string.length() > 0) { + __ mov(ebx, Immediate(string.at(0))); + StringHelper::GenerateHashInit(assm, eax, ebx, ecx); + } + for (int i = 1; i < string.length(); i++) { + __ mov(ebx, Immediate(string.at(i))); + StringHelper::GenerateHashAddCharacter(assm, eax, ebx, ecx); + } + StringHelper::GenerateHashGetHash(assm, eax, ecx); + __ pop(ecx); + __ pop(ebx); + __ Ret(); +#elif V8_TARGET_ARCH_X64 + __ push(rbx); + __ push(rcx); + __ movq(rax, Immediate(0)); + if (string.length() > 0) { + __ movq(rbx, Immediate(string.at(0))); + StringHelper::GenerateHashInit(assm, rax, rbx, rcx); + } + for (int i = 1; i < string.length(); i++) { + __ movq(rbx, Immediate(string.at(i))); + StringHelper::GenerateHashAddCharacter(assm, rax, rbx, rcx); + } + StringHelper::GenerateHashGetHash(assm, rax, rcx); + __ pop(rcx); + __ pop(rbx); + __ Ret(); +#elif V8_TARGET_ARCH_ARM + __ mov(r0, Operand(0)); + if (string.length() > 0) { + __ mov(ip, Operand(string.at(0))); + StringHelper::GenerateHashInit(assm, r0, ip); + } + for (int i = 1; i < string.length(); i++) { + __ mov(ip, Operand(string.at(i))); + StringHelper::GenerateHashAddCharacter(assm, r0, ip); + } + StringHelper::GenerateHashGetHash(assm, r0); + __ mov(pc, Operand(lr)); +#elif V8_TARGET_ARCH_MIPS + __ li(v0, Operand(0)); + if (string.length() > 0) { + __ li(t1, Operand(string.at(0))); + StringHelper::GenerateHashInit(assm, v0, t1); + } + for (int i = 1; i < string.length(); i++) { + __ li(t1, Operand(string.at(i))); + StringHelper::GenerateHashAddCharacter(assm, v0, t1); + } + StringHelper::GenerateHashGetHash(assm, v0); + __ jr(ra); +#endif +} + + +void check(i::Vector<const char> string) { + v8::HandleScope scope; + v8::internal::byte buffer[2048]; + MacroAssembler assm(Isolate::Current(), buffer, sizeof buffer); + + generate(&assm, string); + + CodeDesc desc; + assm.GetCode(&desc); + Code* code = Code::cast(HEAP->CreateCode( + desc, + Code::ComputeFlags(Code::STUB), + Handle<Object>(HEAP->undefined_value()))->ToObjectChecked()); + CHECK(code->IsCode()); + + HASH_FUNCTION hash = FUNCTION_CAST<HASH_FUNCTION>(Code::cast(code)->entry()); + Handle<String> v8_string = FACTORY->NewStringFromAscii(string); + v8_string->set_hash_field(String::kEmptyHashField); +#ifdef USE_SIMULATOR + uint32_t codegen_hash = + reinterpret_cast<uint32_t>(CALL_GENERATED_CODE(hash, 0, 0, 0, 0, 0)); +#else + uint32_t codegen_hash = hash(); +#endif + uint32_t runtime_hash = v8_string->Hash(); + CHECK(runtime_hash == codegen_hash); +} + + +void check_twochars(char a, char b) { + char ab[2] = {a, b}; + check(i::Vector<const char>(ab, 2)); +} + + +TEST(StringHash) { + if (env.IsEmpty()) env = v8::Context::New(); + for (int a = 0; a < String::kMaxAsciiCharCode; a++) { + // Numbers are hashed differently. + if (a >= '0' && a <= '9') continue; + for (int b = 0; b < String::kMaxAsciiCharCode; b++) { + if (b >= '0' && b <= '9') continue; + check_twochars(static_cast<char>(a), static_cast<char>(b)); + } + } + check(i::Vector<const char>("", 0)); + check(i::Vector<const char>("*", 1)); + check(i::Vector<const char>(".zZ", 3)); + check(i::Vector<const char>("muc", 3)); + check(i::Vector<const char>("(>'_')>", 7)); + check(i::Vector<const char>("-=[ vee eight ftw ]=-", 21)); +} + +#undef __ |