Adding upstream version 1.65.7.

Signed-off-by: Daniel Baumann <daniel@debian.org>

mem_musl.go

@@ -0,0 +1,170 @@
+// Copyright 2023 The Libc Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !libc.membrk && !libc.memgrind && linux && (amd64 || arm64 || loong64 || ppc64le || s390x || riscv64 || 386 || arm)
+
+package libc // import "modernc.org/libc"
+
+import (
+	"math"
+	mbits "math/bits"
+
+	"modernc.org/memory"
+)
+
+const (
+	isMemBrk = false
+)
+
+func Xmalloc(tls *TLS, n Tsize_t) (r uintptr) {
+	if __ccgo_strace {
+		trc("tls=%v n=%v, (%v:)", tls, n, origin(2))
+		defer func() { trc("-> %v", r) }()
+	}
+	if n > math.MaxInt {
+		tls.setErrno(ENOMEM)
+		return 0
+	}
+
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	if n == 0 {
+		// malloc(0) should return unique pointers
+		// (often expected and gnulib replaces malloc if malloc(0) returns 0)
+		n = 1
+	}
+	var err error
+	if r, err = allocator.UintptrMalloc(int(n)); err != nil {
+		r = 0
+		tls.setErrno(ENOMEM)
+	}
+	return r
+}
+
+func Xcalloc(tls *TLS, m Tsize_t, n Tsize_t) (r uintptr) {
+	if __ccgo_strace {
+		trc("tls=%v m=%v n=%v, (%v:)", tls, m, n, origin(2))
+		defer func() { trc("-> %v", r) }()
+	}
+	hi, rq := mbits.Mul(uint(m), uint(n))
+	if hi != 0 || rq > math.MaxInt {
+		tls.setErrno(ENOMEM)
+		return 0
+	}
+
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	if rq == 0 {
+		rq = 1
+	}
+
+	var err error
+	if r, err = allocator.UintptrCalloc(int(rq)); err != nil {
+		r = 0
+		tls.setErrno(ENOMEM)
+	}
+	return r
+}
+
+func Xrealloc(tls *TLS, p uintptr, n Tsize_t) (r uintptr) {
+	if __ccgo_strace {
+		trc("tls=%v p=%v n=%v, (%v:)", tls, p, n, origin(2))
+		defer func() { trc("-> %v", r) }()
+	}
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	var err error
+	if r, err = allocator.UintptrRealloc(p, int(n)); err != nil {
+		r = 0
+		tls.setErrno(ENOMEM)
+	}
+	return r
+}
+
+func Xfree(tls *TLS, p uintptr) {
+	if __ccgo_strace {
+		trc("tls=%v p=%v, (%v:)", tls, p, origin(2))
+	}
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	allocator.UintptrFree(p)
+}
+
+func Xmalloc_usable_size(tls *TLS, p uintptr) (r Tsize_t) {
+	if __ccgo_strace {
+		trc("tls=%v p=%v, (%v:)", tls, p, origin(2))
+		defer func() { trc("-> %v", r) }()
+	}
+	if p == 0 {
+		return 0
+	}
+
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	return Tsize_t(memory.UintptrUsableSize(p))
+}
+
+func MemAudit() (r []*MemAuditError) {
+	return nil
+}
+
+func UsableSize(p uintptr) Tsize_t {
+	allocatorMu.Lock()
+
+	defer allocatorMu.Unlock()
+
+	return Tsize_t(memory.UintptrUsableSize(p))
+}
+
+type MemAllocatorStat struct {
+	Allocs int
+	Bytes  int
+	Mmaps  int
+}
+
+// MemStat returns the global memory allocator statistics.
+// should be compiled with the memory.counters build tag for the data to be available.
+func MemStat() MemAllocatorStat {
+	allocatorMu.Lock()
+	defer allocatorMu.Unlock()
+
+	return MemAllocatorStat{
+		Allocs: allocator.Allocs,
+		Bytes:  allocator.Bytes,
+		Mmaps:  allocator.Mmaps,
+	}
+}
+
+// MemAuditStart locks the memory allocator, initializes and enables memory
+// auditing. Finaly it unlocks the memory allocator.
+//
+// Some memory handling errors, like double free or freeing of unallocated
+// memory, will panic when memory auditing is enabled.
+//
+// This memory auditing functionality has to be enabled using the libc.memgrind
+// build tag.
+//
+// It is intended only for debug/test builds. It slows down memory allocation
+// routines and it has additional memory costs.
+func MemAuditStart() {}
+
+// MemAuditReport locks the memory allocator, reports memory leaks, if any.
+// Finally it disables memory auditing and unlocks the memory allocator.
+//
+// This memory auditing functionality has to be enabled using the libc.memgrind
+// build tag.
+//
+// It is intended only for debug/test builds. It slows down memory allocation
+// routines and it has additional memory costs.
+func MemAuditReport() error { return nil }