fb33f3813d
This generally means that code size is reduced, especially when the os
package is not imported.
Specifically:
- On Linux (which currently statically links musl), it avoids calling
malloc, which avoids including the musl C heap for small programs
saving around 1.6kB.
- On WASI, it avoids initializing the args slice when the os package
is not used. This reduces binary size by around 1kB.
56 строки
1,2 КиБ
Go
56 строки
1,2 КиБ
Go
// +build baremetal js
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package runtime
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// This file is for non-hosted environments, that don't support command line
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// parameters or environment variables. To still be able to run certain tests,
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// command line parameters and environment variables can be passed to the binary
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// by setting the variables `runtime.osArgs` and `runtime.osEnv`, both of which
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// are strings separated by newlines.
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//
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// The primary use case is `tinygo test`, which takes some parameters (such as
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// -test.v).
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// This is the default set of arguments, if nothing else has been set.
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var args = []string{"/proc/self/exe"}
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//go:linkname os_runtime_args os.runtime_args
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func os_runtime_args() []string {
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return args
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}
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var env []string
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//go:linkname syscall_runtime_envs syscall.runtime_envs
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func syscall_runtime_envs() []string {
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return env
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}
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var osArgs string
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var osEnv string
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func init() {
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if osArgs != "" {
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s := osArgs
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start := 0
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for i := 0; i < len(s); i++ {
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if s[i] == 0 {
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args = append(args, s[start:i])
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start = i + 1
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}
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}
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args = append(args, s[start:])
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}
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if osEnv != "" {
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s := osEnv
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start := 0
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for i := 0; i < len(s); i++ {
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if s[i] == 0 {
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env = append(env, s[start:i])
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start = i + 1
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}
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}
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env = append(env, s[start:])
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}
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}
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