130 lines
3.0 KiB
Go
130 lines
3.0 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package runtime
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import (
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/pthread"
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"github.com/goplus/llgo/c/signal"
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"github.com/goplus/llgo/c/syscall"
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)
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// -----------------------------------------------------------------------------
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// Defer presents defer statements in a function.
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type Defer struct {
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Addr unsafe.Pointer // sigjmpbuf
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Bits uintptr
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Link *Defer
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Reth unsafe.Pointer // block address after Rethrow
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Rund unsafe.Pointer // block address after RunDefers
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Args []unsafe.Pointer // defer func and args
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}
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// Recover recovers a panic.
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func Recover() (ret any) {
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ptr := excepKey.Get()
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if ptr != nil {
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excepKey.Set(nil)
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ret = *(*any)(ptr)
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c.Free(ptr)
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}
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return
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}
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// Panic panics with a value.
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func Panic(v any) {
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ptr := c.Malloc(unsafe.Sizeof(v))
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*(*any)(ptr) = v
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excepKey.Set(ptr)
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Rethrow((*Defer)(c.GoDeferData()))
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}
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// Rethrow rethrows a panic.
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func Rethrow(link *Defer) {
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if ptr := excepKey.Get(); ptr != nil {
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if link == nil {
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TracePanic(*(*any)(ptr))
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c.Free(ptr)
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c.Exit(2)
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} else {
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c.Siglongjmp(link.Addr, 1)
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}
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}
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}
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var (
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excepKey pthread.Key
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)
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func init() {
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excepKey.Create(nil)
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}
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// -----------------------------------------------------------------------------
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// TracePanic prints panic message.
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func TracePanic(v any) {
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print("panic: ")
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printany(v)
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println("\n")
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}
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/*
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func stringTracef(fp c.FilePtr, format *c.Char, s String) {
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cs := c.Alloca(uintptr(s.len) + 1)
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c.Fprintf(fp, format, CStrCopy(cs, s))
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}
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*/
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// -----------------------------------------------------------------------------
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// New allocates memory and initializes it to zero.
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func New(t *Type) unsafe.Pointer {
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return AllocZ(t.Size_)
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}
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// NewArray allocates memory for an array and initializes it to zero.
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func NewArray(t *Type, n int) unsafe.Pointer {
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return AllocZ(uintptr(n) * t.Size_)
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}
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// -----------------------------------------------------------------------------
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// TODO(xsw): check this
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// must match declarations in runtime/map.go.
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const MaxZero = 1024
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var ZeroVal [MaxZero]byte
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func init() {
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signal.Signal(c.Int(syscall.SIGSEGV), func(v c.Int) {
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switch syscall.Signal(v) {
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case syscall.SIGSEGV:
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panic(errorString("invalid memory address or nil pointer dereference"))
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default:
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var buf [20]byte
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panic(errorString("unexpected signal value: " + string(itoa(buf[:], uint64(v)))))
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}
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})
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}
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// -----------------------------------------------------------------------------
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