# V8Study.x86

**Repository Path**: mirrors_pengwei1024/V8Study.x86

## Basic Information

- **Project Name**: V8Study.x86
- **Description**: V8Study.x86
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-03-31
- **Last Updated**: 2026-03-08

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# V8Study.x86
MAC下编译和运行 V8的例子, v8版本: version=9.1.0 (candidate)


### V8编译脚本 args.gn
```
is_debug = false
target_cpu = "x64"
use_custom_libcxx=false
is_component_build = false
is_clang = true
use_lld = false
v8_static_library = true
v8_monolithic = true
v8_use_external_startup_data = false
v8_enable_testtrue_features = false
v8_enable_i18n_support = false
treat_warnings_as_errors = false
symbol_level = 1
```

## 静态库
本项目提供了两种静态库，都是 X64架构，例如 `lib/v8/platform/mac`下
- libv8_monolith.a 是独立包含全部的静态库，没有开启 v8_use_external_startup_data
- snapshot 文件夹是 开启v8_use_external_startup_data && 关闭 v8_monolithic 后的产物，开启了这个就不支持 v8_monolithic属性， 迷之操作~

## 遇到的坑
####  运行时找不到 zlib, 报错如下：
```
  "_Cr_z_adler32_simd_", referenced from:
      _Cr_z_adler32_z in libchrome_zlib.a(adler32.o)
  "_Cr_z_crc32_sse42_simd_", referenced from:
      _Cr_z_crc32_z in libchrome_zlib.a(crc32.o)
  "_Cr_z_crc_fold_512to32", referenced from:
      _Cr_z_crc_finalize in libchrome_zlib.a(crc32.o)
  "_Cr_z_crc_fold_copy", referenced from:
      _Cr_z_copy_with_crc in libchrome_zlib.a(crc32.o)
  "_Cr_z_crc_fold_init", referenced from:
      _Cr_z_crc_reset in libchrome_zlib.a(crc32.o)
```
可以看到 third_party/zlib/zconf.h 里面说的
```c++
/*
* This library is also built as a part of AOSP, which does not need to include
* chromeconf.h. This config does not want chromeconf.h, so it can set this
* macro to opt out. While this works today, there's no guarantee that building
* zlib outside of Chromium keeps working in the future.
  */
#if !defined(CHROMIUM_ZLIB_NO_CHROMECONF)
/* This include does prefixing as below, but with an updated set of names.  Also
* sets up export macros in component builds. */
#include "chromeconf.h"
#endif
```
`chromeconf.h` 里面把 zlib 的函数都加了一个前缀 `Cr_z_`, 导致运行时找不到函数，我是通过增加`CHROMIUM_ZLIB_NO_CHROMECONF`宏定义绕过了这个问题

#### 卡死在 CreateBlob 方法，不成功也不报错
通过打日志发现是卡在 api.cc 
```c++
isolate->heap()->CollectAllAvailableGarbage(
  i::GarbageCollectionReason::kSnapshotCreator);
```
没办法，把 api.cc 里面的这行代码注释掉就可以运行成功