94 lines
3.6 KiB
Go
94 lines
3.6 KiB
Go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build darwin || freebsd || linux
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package fakecgo
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import (
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_ "unsafe"
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)
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// TODO: decide if we need _runtime_cgo_panic_internal
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//go:linkname x_cgo_init_trampoline x_cgo_init_trampoline
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//go:linkname _cgo_init _cgo_init
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var x_cgo_init_trampoline byte
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var _cgo_init = &x_cgo_init_trampoline
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// Creates a new system thread without updating any Go state.
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//
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// This method is invoked during shared library loading to create a new OS
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// thread to perform the runtime initialization. This method is similar to
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// _cgo_sys_thread_start except that it doesn't update any Go state.
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//go:linkname x_cgo_thread_start_trampoline x_cgo_thread_start_trampoline
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//go:linkname _cgo_thread_start _cgo_thread_start
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var x_cgo_thread_start_trampoline byte
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var _cgo_thread_start = &x_cgo_thread_start_trampoline
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// Notifies that the runtime has been initialized.
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//
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// We currently block at every CGO entry point (via _cgo_wait_runtime_init_done)
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// to ensure that the runtime has been initialized before the CGO call is
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// executed. This is necessary for shared libraries where we kickoff runtime
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// initialization in a separate thread and return without waiting for this
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// thread to complete the init.
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//go:linkname x_cgo_notify_runtime_init_done_trampoline x_cgo_notify_runtime_init_done_trampoline
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//go:linkname _cgo_notify_runtime_init_done _cgo_notify_runtime_init_done
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var x_cgo_notify_runtime_init_done_trampoline byte
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var _cgo_notify_runtime_init_done = &x_cgo_notify_runtime_init_done_trampoline
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// Indicates whether a dummy thread key has been created or not.
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//
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// When calling go exported function from C, we register a destructor
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// callback, for a dummy thread key, by using pthread_key_create.
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//go:linkname _cgo_pthread_key_created _cgo_pthread_key_created
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var x_cgo_pthread_key_created uintptr
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var _cgo_pthread_key_created = &x_cgo_pthread_key_created
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// Set the x_crosscall2_ptr C function pointer variable point to crosscall2.
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// It's for the runtime package to call at init time.
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func set_crosscall2() {
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// nothing needs to be done here for fakecgo
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// because it's possible to just call cgocallback directly
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}
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//go:linkname _set_crosscall2 runtime.set_crosscall2
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var _set_crosscall2 = set_crosscall2
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// Store the g into the thread-specific value.
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// So that pthread_key_destructor will dropm when the thread is exiting.
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//go:linkname x_cgo_bindm_trampoline x_cgo_bindm_trampoline
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//go:linkname _cgo_bindm _cgo_bindm
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var x_cgo_bindm_trampoline byte
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var _cgo_bindm = &x_cgo_bindm_trampoline
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// TODO: decide if we need x_cgo_set_context_function
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// TODO: decide if we need _cgo_yield
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var (
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// In Go 1.20 the race detector was rewritten to pure Go
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// on darwin. This means that when CGO_ENABLED=0 is set
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// fakecgo is built with race detector code. This is not
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// good since this code is pretending to be C. The go:norace
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// pragma is not enough, since it only applies to the native
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// ABIInternal function. The ABIO wrapper (which is necessary,
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// since all references to text symbols from assembly will use it)
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// does not inherit the go:norace pragma, so it will still be
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// instrumented by the race detector.
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//
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// To circumvent this issue, using closure calls in the
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// assembly, which forces the compiler to use the ABIInternal
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// native implementation (which has go:norace) instead.
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threadentry_call = threadentry
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x_cgo_init_call = x_cgo_init
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x_cgo_setenv_call = x_cgo_setenv
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x_cgo_unsetenv_call = x_cgo_unsetenv
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x_cgo_thread_start_call = x_cgo_thread_start
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)
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