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146 lines
3.0 KiB
Go
146 lines
3.0 KiB
Go
// Copyright 2021 The Libc 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 !libc.membrk && !libc.memgrind && !(linux && (amd64 || arm64 || loong64))
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package libc // import "modernc.org/libc"
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import (
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"modernc.org/libc/errno"
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"modernc.org/libc/sys/types"
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"modernc.org/memory"
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)
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const memgrind = false
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var (
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allocator memory.Allocator
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)
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// void *malloc(size_t size);
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func Xmalloc(t *TLS, n types.Size_t) uintptr {
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if __ccgo_strace {
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trc("t=%v n=%v, (%v:)", t, n, origin(2))
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}
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if n == 0 {
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return 0
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}
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allocMu.Lock()
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defer allocMu.Unlock()
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p, err := allocator.UintptrMalloc(int(n))
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if err != nil {
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t.setErrno(errno.ENOMEM)
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return 0
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}
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return p
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}
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// void *calloc(size_t nmemb, size_t size);
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func Xcalloc(t *TLS, n, size types.Size_t) uintptr {
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if __ccgo_strace {
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trc("t=%v size=%v, (%v:)", t, size, origin(2))
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}
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rq := int(n * size)
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if rq == 0 {
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return 0
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}
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allocMu.Lock()
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defer allocMu.Unlock()
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p, err := allocator.UintptrCalloc(int(n * size))
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if err != nil {
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t.setErrno(errno.ENOMEM)
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return 0
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}
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return p
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}
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// void *realloc(void *ptr, size_t size);
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func Xrealloc(t *TLS, ptr uintptr, size types.Size_t) uintptr {
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if __ccgo_strace {
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trc("t=%v ptr=%v size=%v, (%v:)", t, ptr, size, origin(2))
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}
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allocMu.Lock()
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defer allocMu.Unlock()
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p, err := allocator.UintptrRealloc(ptr, int(size))
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if err != nil {
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t.setErrno(errno.ENOMEM)
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return 0
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}
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return p
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}
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// void free(void *ptr);
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func Xfree(t *TLS, p uintptr) {
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if __ccgo_strace {
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trc("t=%v p=%v, (%v:)", t, p, origin(2))
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}
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if p == 0 {
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return
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}
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allocMu.Lock()
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defer allocMu.Unlock()
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allocator.UintptrFree(p)
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}
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func Xmalloc_usable_size(tls *TLS, p uintptr) (r types.Size_t) {
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if __ccgo_strace {
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trc("tls=%v p=%v, (%v:)", tls, p, origin(2))
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defer func() { trc("-> %v", r) }()
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}
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if p == 0 {
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return 0
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}
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allocMu.Lock()
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defer allocMu.Unlock()
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return types.Size_t(memory.UintptrUsableSize(p))
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}
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func UsableSize(p uintptr) types.Size_t {
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allocMu.Lock()
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defer allocMu.Unlock()
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return types.Size_t(memory.UintptrUsableSize(p))
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}
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// MemAuditStart locks the memory allocator, initializes and enables memory
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// auditing. Finaly it unlocks the memory allocator.
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//
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// Some memory handling errors, like double free or freeing of unallocated
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// memory, will panic when memory auditing is enabled.
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//
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// This memory auditing functionality has to be enabled using the libc.memgrind
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// build tag.
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//
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// It is intended only for debug/test builds. It slows down memory allocation
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// routines and it has additional memory costs.
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func MemAuditStart() {}
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// MemAuditReport locks the memory allocator, reports memory leaks, if any.
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// Finally it disables memory auditing and unlocks the memory allocator.
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//
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// This memory auditing functionality has to be enabled using the libc.memgrind
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// build tag.
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//
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// It is intended only for debug/test builds. It slows down memory allocation
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// routines and it has additional memory costs.
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func MemAuditReport() error { return nil }
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