mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <ctype.h>
|
|
#include <dispatch/dispatch.h>
|
|
#include <os/base.h>
|
|
#include <os/log.h>
|
|
#include <locale.h>
|
|
#if !defined(__linux__)
|
|
#include <xlocale.h>
|
|
#endif
|
|
#include "os_trace_blob.h"
|
|
|
|
OS_NOINLINE
|
|
static void
|
|
_os_trace_temporary_resource_shortage(void)
|
|
{
|
|
sleep(1);
|
|
}
|
|
|
|
static void *
|
|
_os_trace_malloc(size_t size)
|
|
{
|
|
void *buf;
|
|
while (os_unlikely(!(buf = malloc(size)))) {
|
|
_os_trace_temporary_resource_shortage();
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
static void *
|
|
_os_trace_memdup(void *ptr, size_t size)
|
|
{
|
|
return memcpy(_os_trace_malloc(size), ptr, size);
|
|
}
|
|
|
|
static void *
|
|
_os_trace_realloc(void *ptr, size_t size)
|
|
{
|
|
void *buf;
|
|
while (os_unlikely(!(buf = realloc(ptr, size)))) {
|
|
_os_trace_temporary_resource_shortage();
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
void
|
|
os_trace_blob_destroy_slow(os_trace_blob_t ob)
|
|
{
|
|
char *s = ob->ob_s;
|
|
ob->ob_s = (void *)0xEBADF000;
|
|
ob->ob_flags = 0;
|
|
free(s);
|
|
}
|
|
|
|
char *
|
|
os_trace_blob_detach(os_trace_blob_t ob, size_t *len)
|
|
{
|
|
bool needs_free = ob->ob_flags & OS_TRACE_BLOB_NEEDS_FREE;
|
|
char *s = ob->ob_s;
|
|
ob->ob_s = (void *)0xEBADF000;
|
|
ob->ob_flags = 0;
|
|
if (len) *len = ob->ob_len;
|
|
if (needs_free) return s;
|
|
return _os_trace_memdup(s, ob->ob_len + !ob->ob_binary);
|
|
}
|
|
|
|
OS_NOINLINE
|
|
static uint32_t
|
|
os_trace_blob_grow(os_trace_blob_t ob, size_t hint)
|
|
{
|
|
uint32_t size, minsize, used = ob->ob_len + !ob->ob_binary;
|
|
if (os_add_overflow(used, hint, &minsize)) {
|
|
size = ob->ob_maxsize;
|
|
} else if (os_mul_overflow(ob->ob_size, 2, &size)) {
|
|
size = ob->ob_maxsize;
|
|
} else {
|
|
size = MIN((uint32_t)ob->ob_maxsize, MAX(minsize, size));
|
|
}
|
|
if (size > ob->ob_size) {
|
|
if (ob->ob_flags & OS_TRACE_BLOB_NEEDS_FREE) {
|
|
ob->ob_s = _os_trace_realloc(ob->ob_s, size);
|
|
} else {
|
|
char *s = ob->ob_s;
|
|
ob->ob_s = _os_trace_malloc(size);
|
|
memcpy(ob->ob_s, s, used);
|
|
ob->ob_flags |= OS_TRACE_BLOB_NEEDS_FREE;
|
|
}
|
|
ob->ob_size = size;
|
|
}
|
|
return size - used;
|
|
}
|
|
|
|
uint32_t
|
|
os_trace_blob_add_slow(os_trace_blob_t ob, const void *ptr, size_t size)
|
|
{
|
|
if (os_unlikely(ob->ob_flags & OS_TRACE_BLOB_TRUNCATED)) {
|
|
return 0;
|
|
}
|
|
|
|
uint32_t avail = _os_trace_blob_available(ob);
|
|
if (avail < size) {
|
|
if (ob->ob_size < ob->ob_maxsize) {
|
|
avail = os_trace_blob_grow(ob, size);
|
|
}
|
|
if (avail < size) {
|
|
ob->ob_flags |= OS_TRACE_BLOB_TRUNCATED;
|
|
size = avail;
|
|
}
|
|
}
|
|
|
|
memcpy(ob->ob_s + ob->ob_len, ptr, size);
|
|
return _os_trace_blob_growlen(ob, size);
|
|
}
|