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Merge pull request #474 from kumakichi/fix_cgo_code_snippet

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fix cgo code snippet
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chai2010 2019-10-30 20:09:38 +08:00 committed by GitHub
commit 40b92f8d81
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2 changed files with 3 additions and 3 deletions
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4
ch2-cgo/ch2-02-basic.md
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@ -123,9 +123,9 @@ package main
#if defined(CGO_OS_WINDOWS)
const char* os = "windows";
#elif defined(CGO_OS_DARWIN)
static const char* os = "darwin";
const char* os = "darwin";
#elif defined(CGO_OS_LINUX)
static const char* os = "linux";
const char* os = "linux";
#else
# error(unknown os)
#endif

2
ch3-asm/ch3-01-basic.md
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@ -164,7 +164,7 @@ func main() {
不幸的是这次运行产生了以下错误：
```
pkgpath.NameData: missing Go //type information for global symbol: size 8
pkgpath.NameData: missing Go type information for global symbol: size 8
```
错误提示汇编中定义的NameData符号没有类型信息。其实Go汇编语言中定义的数据并没有所谓的类型，每个符号只不过是对应一块内存而已，因此NameData符号也是没有类型的。但是Go语言是再带垃圾回收器的语言，而Go汇编语言是工作在自动垃圾回收体系框架内的。当Go语言的垃圾回收器在扫描到NameData变量的时候，无法知晓该变量内部是否包含指针，因此就出现了这种错误。错误的根本原因并不是NameData没有类型，而是NameData变量没有标注是否会含有指针信息。