ndk_cruft.cpp revision 0921204660b9597de795065d0350a787035ad589
1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29// This file perpetuates the mistakes of the past, but only for 32-bit targets. 30#if !defined(__LP64__) 31 32#include <ctype.h> 33#include <inttypes.h> 34#include <pthread.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <sys/resource.h> 38#include <sys/syscall.h> 39#include <sys/time.h> 40#include <sys/types.h> 41#include <sys/wait.h> 42#include <unistd.h> 43#include <wchar.h> 44 45// These were accidentally declared in <unistd.h> because we stupidly used to inline 46// getpagesize() and __getpageshift(). Needed for backwards compatibility with old NDK apps. 47extern "C" { 48 unsigned int __page_size = PAGE_SIZE; 49 unsigned int __page_shift = 12; 50} 51 52// TODO: remove this backward compatibility hack (for jb-mr1 strace binaries). 53extern "C" pid_t __wait4(pid_t pid, int* status, int options, struct rusage* rusage) { 54 return wait4(pid, status, options, rusage); 55} 56 57// TODO: does anything still need this? 58extern "C" int __open() { 59 abort(); 60} 61 62// TODO: does anything still need this? 63extern "C" void** __get_tls() { 64#include "private/__get_tls.h" 65 return __get_tls(); 66} 67 68// This non-standard function was in our <string.h> for some reason. 69extern "C" void memswap(void* m1, void* m2, size_t n) { 70 char* p = reinterpret_cast<char*>(m1); 71 char* p_end = p + n; 72 char* q = reinterpret_cast<char*>(m2); 73 while (p < p_end) { 74 char tmp = *p; 75 *p = *q; 76 *q = tmp; 77 p++; 78 q++; 79 } 80} 81 82extern "C" int pthread_attr_setstackaddr(pthread_attr_t*, void*) { 83 // This was removed from POSIX.1-2008, and is not implemented on bionic. 84 // Needed for ABI compatibility with the NDK. 85 return ENOSYS; 86} 87 88extern "C" int pthread_attr_getstackaddr(const pthread_attr_t* attr, void** stack_addr) { 89 // This was removed from POSIX.1-2008. 90 // Needed for ABI compatibility with the NDK. 91 *stack_addr = (char*)attr->stack_base + attr->stack_size; 92 return 0; 93} 94 95// Non-standard cruft that should only ever have been in system/core/toolbox. 96extern "C" char* strtotimeval(const char* str, struct timeval* ts) { 97 char* s; 98 ts->tv_sec = strtoumax(str, &s, 10); 99 100 long fractional_seconds = 0; 101 if (*s == '.') { 102 s++; 103 int count = 0; 104 105 // Read up to 6 digits (microseconds). 106 while (*s && isdigit(*s)) { 107 if (++count < 7) { 108 fractional_seconds = fractional_seconds*10 + (*s - '0'); 109 } 110 s++; 111 } 112 113 for (; count < 6; count++) { 114 fractional_seconds *= 10; 115 } 116 } 117 118 ts->tv_usec = fractional_seconds; 119 return s; 120} 121 122static inline int digitval(int ch) { 123 unsigned d; 124 125 d = (unsigned)(ch - '0'); 126 if (d < 10) return (int)d; 127 128 d = (unsigned)(ch - 'a'); 129 if (d < 6) return (int)(d+10); 130 131 d = (unsigned)(ch - 'A'); 132 if (d < 6) return (int)(d+10); 133 134 return -1; 135} 136 137// This non-standard function was in our <inttypes.h> for some reason. 138extern "C" uintmax_t strntoumax(const char *nptr, char **endptr, int base, size_t n) { 139 const unsigned char* p = (const unsigned char *)nptr; 140 const unsigned char* end = p + n; 141 int minus = 0; 142 uintmax_t v = 0; 143 int d; 144 145 while (p < end && isspace(*p)) { 146 p++; 147 } 148 149 if (p < end) { 150 char c = p[0]; 151 if (c == '-' || c == '+') { 152 minus = (c == '-'); 153 p++; 154 } 155 } 156 157 if (base == 0) { 158 if (p+2 < end && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) { 159 p += 2; 160 base = 16; 161 } else if (p+1 < end && p[0] == '0') { 162 p += 1; 163 base = 8; 164 } else { 165 base = 10; 166 } 167 } else if (base == 16) { 168 if (p+2 < end && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) { 169 p += 2; 170 } 171 } 172 173 while (p < end && (d = digitval(*p)) >= 0 && d < base) { 174 v = v*base + d; 175 p += 1; 176 } 177 178 if (endptr) { 179 *endptr = (char*) p; 180 } 181 182 return minus ? -v : v; 183} 184 185// This non-standard function was in our <inttypes.h> for some reason. 186extern "C" intmax_t strntoimax(const char* nptr, char** endptr, int base, size_t n) { 187 return (intmax_t) strntoumax(nptr, endptr, base, n); 188} 189 190// POSIX calls this dprintf, but LP32 Android had fdprintf instead. 191extern "C" int fdprintf(int fd, const char* fmt, ...) { 192 va_list ap; 193 va_start(ap, fmt); 194 int rc = vdprintf(fd, fmt, ap); 195 va_end(ap); 196 return rc; 197} 198 199// POSIX calls this vdprintf, but LP32 Android had fdprintf instead. 200extern "C" int vfdprintf(int fd, const char* fmt, va_list ap) { 201 return vdprintf(fd, fmt, ap); 202} 203 204#define __futex_wake __real_futex_wake 205#define __futex_wait __real_futex_wait 206#include "private/bionic_futex.h" 207#undef __futex_wake 208#undef __futex_wait 209 210// This used to be in <sys/atomics.h>. 211extern "C" int __futex_wake(volatile void* ftx, int count) { 212 return __real_futex_wake(ftx, count); 213} 214 215// This used to be in <sys/atomics.h>. 216extern "C" int __futex_wait(volatile void* ftx, int value, const struct timespec* timeout) { 217 return __real_futex_wait(ftx, value, timeout); 218} 219 220// Unity's libmono uses this. 221extern "C" int tkill(pid_t tid, int sig) { 222 return syscall(__NR_tkill, tid, sig); 223} 224 225extern "C" wchar_t* wcswcs(wchar_t* haystack, wchar_t* needle) { 226 return wcsstr(haystack, needle); 227} 228 229#endif 230