dfsan_custom.cc revision 86277eb844c4983c81de62d7c050e92fe7155788
16e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne//===-- dfsan.cc ----------------------------------------------------------===// 26e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// 36e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// The LLVM Compiler Infrastructure 46e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// 56e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// This file is distributed under the University of Illinois Open Source 66e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// License. See LICENSE.TXT for details. 76e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// 86e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne//===----------------------------------------------------------------------===// 96e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// 106e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// This file is a part of DataFlowSanitizer. 116e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// 126e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// This file defines the custom functions listed in done_abilist.txt. 136e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne//===----------------------------------------------------------------------===// 142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 156d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include "sanitizer_common/sanitizer_common.h" 166e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include "sanitizer_common/sanitizer_internal_defs.h" 176e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include "sanitizer_common/sanitizer_linux.h" 186e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 196e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include "dfsan/dfsan.h" 206e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <arpa/inet.h> 226d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include <assert.h> 236e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <ctype.h> 246e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <dlfcn.h> 255fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne#include <link.h> 262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <poll.h> 276c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne#include <pthread.h> 282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <pwd.h> 292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sched.h> 302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <signal.h> 316d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include <stdarg.h> 326d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include <stdint.h> 332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <stdio.h> 346e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <stdlib.h> 356e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <string.h> 362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sys/resource.h> 372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sys/select.h> 386e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <sys/stat.h> 392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sys/time.h> 402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sys/types.h> 416e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <time.h> 426e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne#include <unistd.h> 436e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 446e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourneusing namespace __dfsan; 456e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 466e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourneextern "C" { 476e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int 486e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_stat(const char *path, struct stat *buf, dfsan_label path_label, 496e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label buf_label, dfsan_label *ret_label) { 506e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne int ret = stat(path, buf); 516e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (ret == 0) 526e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, buf, sizeof(struct stat)); 536e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 546e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 556e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 566e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 576e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_fstat(int fd, struct stat *buf, 586e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label fd_label, 596e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label buf_label, 606e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 616e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne int ret = fstat(fd, buf); 626e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (ret == 0) 636e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, buf, sizeof(struct stat)); 646e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 656e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 666e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 676e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 686e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE char *__dfsw_strchr(const char *s, int c, 696e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s_label, 706e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label c_label, 716e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 726e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0;; ++i) { 736e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (s[i] == c || s[i] == 0) { 742d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = s_label; 762d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(s, i + 1), 782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(s_label, c_label)); 792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 806e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s[i] == 0 ? 0 : const_cast<char *>(s+i); 816e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 826e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 836e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 846e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 856e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_memcmp(const void *s1, const void *s2, 866e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne size_t n, dfsan_label s1_label, 876e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s2_label, 886e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label n_label, 896e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 906e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne const char *cs1 = (const char *) s1, *cs2 = (const char *) s2; 916e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0; i != n; ++i) { 926e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (cs1[i] != cs2[i]) { 932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(cs1, i + 1), 972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(cs2, i + 1)); 982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 996e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return cs1[i] - cs2[i]; 1006e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1016e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 1032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 1042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 1052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 1062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(cs1, n), 1072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(cs2, n)); 1082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 1096e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1106e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1116e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1126e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_strcmp(const char *s1, const char *s2, 1136e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s1_label, 1146e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s2_label, 1156e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 1166e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0;; ++i) { 1176e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (s1[i] != s2[i] || s1[i] == 0 || s2[i] == 0) { 1182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 1192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 1202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 1212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(s1, i + 1), 1222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(s2, i + 1)); 1232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 1246e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s1[i] - s2[i]; 1256e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1266e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1276e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1286e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1296e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1306e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int 1316e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_strcasecmp(const char *s1, const char *s2, dfsan_label s1_label, 1326e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s2_label, dfsan_label *ret_label) { 1336e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0;; ++i) { 1346e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (tolower(s1[i]) != tolower(s2[i]) || s1[i] == 0 || s2[i] == 0) { 1352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 1362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 1372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 1382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(s1, i + 1), 1392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(s2, i + 1)); 1402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 1416e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s1[i] - s2[i]; 1426e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1436e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1446e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1456e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1466e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1476e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_strncmp(const char *s1, const char *s2, 1486e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne size_t n, dfsan_label s1_label, 1496e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s2_label, 1506e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label n_label, 1516e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 1526e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (n == 0) { 1536e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 1546e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1556e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1566e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1576e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0;; ++i) { 1582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (s1[i] != s2[i] || s1[i] == 0 || s2[i] == 0 || i == n - 1) { 1592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 1602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 1612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 1622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(s1, i + 1), 1632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(s2, i + 1)); 1642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 1656e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s1[i] - s2[i]; 1666e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1676e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1686e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1696e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1706e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1716e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int 1726e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_strncasecmp(const char *s1, const char *s2, size_t n, 1736e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s1_label, dfsan_label s2_label, 1746e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label n_label, dfsan_label *ret_label) { 1756e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (n == 0) { 1766e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 1776e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1786e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1796e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1806e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne for (size_t i = 0;; ++i) { 1816e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (tolower(s1[i]) != tolower(s2[i]) || s1[i] == 0 || s2[i] == 0 || 1826e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne i == n - 1) { 1832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 1842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 1852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 1862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union(dfsan_read_label(s1, i + 1), 1872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(s2, i + 1)); 1882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 1896e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s1[i] - s2[i]; 1906e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1916e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 1926e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return 0; 1936e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1946e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 1956e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE void *__dfsw_calloc(size_t nmemb, size_t size, 1966e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label nmemb_label, 1976e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label size_label, 1986e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 1996e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne void *p = calloc(nmemb, size); 2006e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, p, nmemb * size); 2016e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 2026e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return p; 2036e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2046e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2056e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE size_t 2066e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_strlen(const char *s, dfsan_label s_label, dfsan_label *ret_label) { 2076e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne size_t ret = strlen(s); 2082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 2092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 2102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 2112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_read_label(s, ret + 1); 2122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 2136e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 2146e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2156e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2166e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2176e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbournestatic void *dfsan_memcpy(void *dest, const void *src, size_t n) { 2186d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label *sdest = shadow_for(dest); 2196d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const dfsan_label *ssrc = shadow_for(src); 2206d1862363c88c183b0ed7740fca876342cf0474bStephen Hines internal_memcpy((void *)sdest, (const void *)ssrc, n * sizeof(dfsan_label)); 2216e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return internal_memcpy(dest, src, n); 2226e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2236e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2246e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbournestatic void dfsan_memset(void *s, int c, dfsan_label c_label, size_t n) { 2256e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne internal_memset(s, c, n); 2266e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(c_label, s, n); 2276e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2286e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2296e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE 2306e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbournevoid *__dfsw_memcpy(void *dest, const void *src, size_t n, 2316e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label dest_label, dfsan_label src_label, 2326e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label n_label, dfsan_label *ret_label) { 2332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dest_label; 2346e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return dfsan_memcpy(dest, src, n); 2356e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2366e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2376e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE 2386e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbournevoid *__dfsw_memset(void *s, int c, size_t n, 2396e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s_label, dfsan_label c_label, 2406e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label n_label, dfsan_label *ret_label) { 2416e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_memset(s, c, c_label, n); 2422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = s_label; 2436e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s; 2446e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2456e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2466e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE char * 2476e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_strdup(const char *s, dfsan_label s_label, dfsan_label *ret_label) { 2486e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne size_t len = strlen(s); 2496e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne void *p = malloc(len+1); 2506e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_memcpy(p, s, len+1); 2516e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 2526e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return static_cast<char *>(p); 2536e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2546e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2556e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE char * 2566e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_strncpy(char *s1, const char *s2, size_t n, dfsan_label s1_label, 2576e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label s2_label, dfsan_label n_label, 2586e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 2596e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne size_t len = strlen(s2); 2606e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (len < n) { 2616e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_memcpy(s1, s2, len+1); 2626e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_memset(s1+len+1, 0, 0, n-len-1); 2636e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } else { 2646e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_memcpy(s1, s2, n); 2656e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne } 2666e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = s1_label; 2686e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return s1; 2696e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2706e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2716e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE ssize_t 2726e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_pread(int fd, void *buf, size_t count, off_t offset, 2736e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label fd_label, dfsan_label buf_label, 2746e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label count_label, dfsan_label offset_label, 2756e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 2766e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne ssize_t ret = pread(fd, buf, count, offset); 2776e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (ret > 0) 2786e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, buf, ret); 2796e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 2806e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 2816e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2826e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2836e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE ssize_t 2846e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_read(int fd, void *buf, size_t count, 2856e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label fd_label, dfsan_label buf_label, 2866e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label count_label, 2876e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 2886e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne ssize_t ret = read(fd, buf, count); 2896e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (ret > 0) 2906e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, buf, ret); 2916e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 2926e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 2936e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 2946e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 2956e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_clock_gettime(clockid_t clk_id, 2966e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne struct timespec *tp, 2976e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label clk_id_label, 2986e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label tp_label, 2996e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label *ret_label) { 3006e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne int ret = clock_gettime(clk_id, tp); 3016e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (ret == 0) 3026e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, tp, sizeof(struct timespec)); 3036e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 3046e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne return ret; 3056e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 3066e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 3076e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbournestatic void unpoison(const void *ptr, uptr size) { 3086e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_set_label(0, const_cast<void *>(ptr), size); 3096e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 3106e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 3116e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// dlopen() ultimately calls mmap() down inside the loader, which generally 3126e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// doesn't participate in dynamic symbol resolution. Therefore we won't 3136e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne// intercept its calls to mmap, and we have to hook it here. 3146e4c46dc162803cc99c2a5e068fc28adb873a431Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE void * 3156e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne__dfsw_dlopen(const char *filename, int flag, dfsan_label filename_label, 3166e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne dfsan_label flag_label, dfsan_label *ret_label) { 31786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines void *handle = dlopen(filename, flag); 31886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines link_map *map = GET_LINK_MAP_BY_DLOPEN_HANDLE(handle); 3196e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne if (map) 3206e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne ForEachMappedRegion(map, unpoison); 3216e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne *ret_label = 0; 32286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return handle; 3236e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 3246e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne 3256c6374474949329f6ae00318027e9e32aa87057fPeter Collingbournestruct pthread_create_info { 3266c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne void *(*start_routine_trampoline)(void *, void *, dfsan_label, dfsan_label *); 3276c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne void *start_routine; 3286c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne void *arg; 3296c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne}; 3306c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne 3316c6374474949329f6ae00318027e9e32aa87057fPeter Collingbournestatic void *pthread_create_cb(void *p) { 3326c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pthread_create_info pci(*(pthread_create_info *)p); 3336c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne free(p); 3346c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne dfsan_label ret_label; 3356c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne return pci.start_routine_trampoline(pci.start_routine, pci.arg, 0, 3366c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne &ret_label); 3376c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne} 3386c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne 3396c6374474949329f6ae00318027e9e32aa87057fPeter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_pthread_create( 3406c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pthread_t *thread, const pthread_attr_t *attr, 3416c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne void *(*start_routine_trampoline)(void *, void *, dfsan_label, 3426c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne dfsan_label *), 3436c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne void *start_routine, void *arg, dfsan_label thread_label, 3446c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne dfsan_label attr_label, dfsan_label start_routine_label, 3456c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne dfsan_label arg_label, dfsan_label *ret_label) { 3466c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pthread_create_info *pci = 3476c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne (pthread_create_info *)malloc(sizeof(pthread_create_info)); 3486c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pci->start_routine_trampoline = start_routine_trampoline; 3496c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pci->start_routine = start_routine; 3506c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne pci->arg = arg; 3516c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne int rv = pthread_create(thread, attr, pthread_create_cb, (void *)pci); 3526c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne if (rv != 0) 3536c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne free(pci); 3546c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne *ret_label = 0; 3556c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne return rv; 3566c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne} 3576c6374474949329f6ae00318027e9e32aa87057fPeter Collingbourne 3585fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbournestruct dl_iterate_phdr_info { 3595fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne int (*callback_trampoline)(void *callback, struct dl_phdr_info *info, 3605fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne size_t size, void *data, dfsan_label info_label, 3615fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label size_label, dfsan_label data_label, 3625fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label *ret_label); 3635fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne void *callback; 3645fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne void *data; 3655fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne}; 3665fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne 3675fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourneint dl_iterate_phdr_cb(struct dl_phdr_info *info, size_t size, void *data) { 3685fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dl_iterate_phdr_info *dipi = (dl_iterate_phdr_info *)data; 3695fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_set_label(0, *info); 3706d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_set_label(0, const_cast<char *>(info->dlpi_name), 3716d1862363c88c183b0ed7740fca876342cf0474bStephen Hines strlen(info->dlpi_name) + 1); 3726d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_set_label( 3736d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 0, const_cast<char *>(reinterpret_cast<const char *>(info->dlpi_phdr)), 3746d1862363c88c183b0ed7740fca876342cf0474bStephen Hines sizeof(*info->dlpi_phdr) * info->dlpi_phnum); 3755fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label ret_label; 3765fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne return dipi->callback_trampoline(dipi->callback, info, size, dipi->data, 0, 0, 3775fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne 0, &ret_label); 3785fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne} 3795fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne 3805fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter CollingbourneSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_dl_iterate_phdr( 3815fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne int (*callback_trampoline)(void *callback, struct dl_phdr_info *info, 3825fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne size_t size, void *data, dfsan_label info_label, 3835fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label size_label, dfsan_label data_label, 3845fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label *ret_label), 3855fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne void *callback, void *data, dfsan_label callback_label, 3865fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dfsan_label data_label, dfsan_label *ret_label) { 3875fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne dl_iterate_phdr_info dipi = { callback_trampoline, callback, data }; 3885fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne *ret_label = 0; 3895fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne return dl_iterate_phdr(dl_iterate_phdr_cb, &dipi); 3905fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne} 3915fa3d5d7ec35a704c6362d8d04f03023bb6e95e8Peter Collingbourne 3922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 3932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineschar *__dfsw_ctime_r(const time_t *timep, char *buf, dfsan_label timep_label, 3942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label buf_label, dfsan_label *ret_label) { 3952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = ctime_r(timep, buf); 3962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 3972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(dfsan_read_label(timep, sizeof(time_t)), buf, 3982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines strlen(buf) + 1); 3992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = buf_label; 4002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 4012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineschar *__dfsw_fgets(char *s, int size, FILE *stream, dfsan_label s_label, 4082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label size_label, dfsan_label stream_label, 4092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 4102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = fgets(s, size, stream); 4112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 4122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, ret, strlen(ret) + 1); 4132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = s_label; 4142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 4152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineschar *__dfsw_getcwd(char *buf, size_t size, dfsan_label buf_label, 4222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label size_label, dfsan_label *ret_label) { 4232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = getcwd(buf, size); 4242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 4252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, ret, strlen(ret) + 1); 4262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = buf_label; 4272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 4282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineschar *__dfsw_get_current_dir_name(dfsan_label *ret_label) { 4352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = get_current_dir_name(); 4362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 4372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, ret, strlen(ret) + 1); 4382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_gethostname(char *name, size_t len, dfsan_label name_label, 4452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label len_label, dfsan_label *ret_label) { 4462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = gethostname(name, len); 4472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 4482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, name, strlen(name) + 1); 4492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4502d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4512d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4522d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4532d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4542d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4552d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_getrlimit(int resource, struct rlimit *rlim, 4562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label resource_label, dfsan_label rlim_label, 4572d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 4582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = getrlimit(resource, rlim); 4592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 4602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, rlim, sizeof(struct rlimit)); 4612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4652d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4662d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_getrusage(int who, struct rusage *usage, dfsan_label who_label, 4682d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label usage_label, dfsan_label *ret_label) { 4692d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = getrusage(who, usage); 4702d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 4712d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, usage, sizeof(struct rusage)); 4722d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4732d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 4742d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4762d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineschar *__dfsw_strcpy(char *dest, const char *src, dfsan_label dst_label, 4792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label src_label, dfsan_label *ret_label) { 4802d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = strcpy(dest, src); 4812d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 4822d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines internal_memcpy(shadow_for(dest), shadow_for(src), 4832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines sizeof(dfsan_label) * (strlen(src) + 1)); 4842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dst_label; 4862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 4872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 4882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 4892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 4902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineslong int __dfsw_strtol(const char *nptr, char **endptr, int base, 4912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nptr_label, dfsan_label endptr_label, 4922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label base_label, dfsan_label *ret_label) { 4932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *tmp_endptr; 4942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines long int ret = strtol(nptr, &tmp_endptr, base); 4952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (endptr) { 4962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *endptr = tmp_endptr; 4972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 4982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tmp_endptr > nptr) { 4992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // If *tmp_endptr is '\0' include its label as well. 5002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union( 5012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines base_label, 5022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(nptr, tmp_endptr - nptr + (*tmp_endptr ? 0 : 1))); 5032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 5042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 5082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 5092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 5102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesdouble __dfsw_strtod(const char *nptr, char **endptr, 5112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nptr_label, dfsan_label endptr_label, 5122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 5132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *tmp_endptr; 5142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines double ret = strtod(nptr, &tmp_endptr); 5152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (endptr) { 5162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *endptr = tmp_endptr; 5172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tmp_endptr > nptr) { 5192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // If *tmp_endptr is '\0' include its label as well. 5202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_read_label( 5212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines nptr, 5222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines tmp_endptr - nptr + (*tmp_endptr ? 0 : 1)); 5232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 5242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 5282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 5292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 5302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineslong long int __dfsw_strtoll(const char *nptr, char **endptr, int base, 5312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nptr_label, dfsan_label endptr_label, 5322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label base_label, dfsan_label *ret_label) { 5332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *tmp_endptr; 5342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines long long int ret = strtoll(nptr, &tmp_endptr, base); 5352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (endptr) { 5362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *endptr = tmp_endptr; 5372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tmp_endptr > nptr) { 5392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // If *tmp_endptr is '\0' include its label as well. 5402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union( 5412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines base_label, 5422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(nptr, tmp_endptr - nptr + (*tmp_endptr ? 0 : 1))); 5432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 5442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 5482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 5492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 5502d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesunsigned long int __dfsw_strtoul(const char *nptr, char **endptr, int base, 5512d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nptr_label, dfsan_label endptr_label, 5522d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label base_label, dfsan_label *ret_label) { 5532d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *tmp_endptr; 5542d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines unsigned long int ret = strtoul(nptr, &tmp_endptr, base); 5552d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (endptr) { 5562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *endptr = tmp_endptr; 5572d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tmp_endptr > nptr) { 5592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // If *tmp_endptr is '\0' include its label as well. 5602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union( 5612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines base_label, 5622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(nptr, tmp_endptr - nptr + (*tmp_endptr ? 0 : 1))); 5632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 5642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5652d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5662d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 5682d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 5692d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 5702d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hineslong long unsigned int __dfsw_strtoull(const char *nptr, char **endptr, 5712d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nptr_label, 5722d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int base, dfsan_label endptr_label, 5732d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label base_label, 5742d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 5752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *tmp_endptr; 5762d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines long long unsigned int ret = strtoull(nptr, &tmp_endptr, base); 5772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (endptr) { 5782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *endptr = tmp_endptr; 5792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5802d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tmp_endptr > nptr) { 5812d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // If *tmp_endptr is '\0' include its label as well. 5822d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = dfsan_union( 5832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines base_label, 5842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_read_label(nptr, tmp_endptr - nptr + (*tmp_endptr ? 0 : 1))); 5852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 5862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 5902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 5912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 5922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinestime_t __dfsw_time(time_t *t, dfsan_label t_label, dfsan_label *ret_label) { 5932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines time_t ret = time(t); 5942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret != (time_t) -1 && t) { 5952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, t, sizeof(time_t)); 5962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 5972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 5982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 5992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_inet_pton(int af, const char *src, void *dst, dfsan_label af_label, 6032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label src_label, dfsan_label dst_label, 6042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 6052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = inet_pton(af, src, dst); 6062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 1) { 6072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(dfsan_read_label(src, strlen(src) + 1), dst, 6082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines af == AF_INET ? sizeof(struct in_addr) : sizeof(in6_addr)); 6092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstruct tm *__dfsw_localtime_r(const time_t *timep, struct tm *result, 6162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label timep_label, dfsan_label result_label, 6172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 6182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines struct tm *ret = localtime_r(timep, result); 6192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret) { 6202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(dfsan_read_label(timep, sizeof(time_t)), result, 6212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines sizeof(struct tm)); 6222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = result_label; 6232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 6242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_getpwuid_r(id_t uid, struct passwd *pwd, 6312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *buf, size_t buflen, struct passwd **result, 6322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label uid_label, dfsan_label pwd_label, 6332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label buf_label, dfsan_label buflen_label, 6342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label result_label, dfsan_label *ret_label) { 6352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // Store the data in pwd, the strings referenced from pwd in buf, and the 6362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // address of pwd in *result. On failure, NULL is stored in *result. 6372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = getpwuid_r(uid, pwd, buf, buflen, result); 6382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 6392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, pwd, sizeof(struct passwd)); 6402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, buf, strlen(buf) + 1); 6412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, result, sizeof(struct passwd*)); 6442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_poll(struct pollfd *fds, nfds_t nfds, int timeout, 6492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label dfs_label, dfsan_label nfds_label, 6502d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label timeout_label, dfsan_label *ret_label) { 6512d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = poll(fds, nfds, timeout); 6522d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret >= 0) { 6532d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines for (; nfds > 0; --nfds) { 6542d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, &fds[nfds - 1].revents, sizeof(fds[nfds - 1].revents)); 6552d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6572d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_select(int nfds, fd_set *readfds, fd_set *writefds, 6632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines fd_set *exceptfds, struct timeval *timeout, 6642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label nfds_label, dfsan_label readfds_label, 6652d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label writefds_label, dfsan_label exceptfds_label, 6662d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label timeout_label, dfsan_label *ret_label) { 6672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = select(nfds, readfds, writefds, exceptfds, timeout); 6682d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // Clear everything (also on error) since their content is either set or 6692d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // undefined. 6702d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (readfds) { 6712d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, readfds, sizeof(fd_set)); 6722d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6732d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (writefds) { 6742d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, writefds, sizeof(fd_set)); 6752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6762d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (exceptfds) { 6772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, exceptfds, sizeof(fd_set)); 6782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, timeout, sizeof(struct timeval)); 6802d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6812d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6822d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *mask, 6862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label pid_label, 6872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label cpusetsize_label, 6882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label mask_label, dfsan_label *ret_label) { 6892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = sched_getaffinity(pid, cpusetsize, mask); 6902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 6912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, mask, cpusetsize); 6922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 6932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 6942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 6952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 6962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 6972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 6982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_sigemptyset(sigset_t *set, dfsan_label set_label, 6992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = sigemptyset(set); 7012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, set, sizeof(sigset_t)); 7022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 7062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_sigaction(int signum, const struct sigaction *act, 7072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines struct sigaction *oldact, dfsan_label signum_label, 7082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label act_label, dfsan_label oldact_label, 7092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = sigaction(signum, act, oldact); 7112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (oldact) { 7122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, oldact, sizeof(struct sigaction)); 7132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 7152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE 7192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint __dfsw_gettimeofday(struct timeval *tv, struct timezone *tz, 7202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label tv_label, dfsan_label tz_label, 7212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = gettimeofday(tv, tz); 7232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tv) { 7242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, tv, sizeof(struct timeval)); 7252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (tz) { 7272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, tz, sizeof(struct timezone)); 7282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 7302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE void *__dfsw_memchr(void *s, int c, size_t n, 7342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label s_label, 7352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label c_label, 7362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label n_label, 7372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void *ret = memchr(s, c, n); 7392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 7402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = ret ? s_label : 0; 7412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 7422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines size_t len = 7432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines ret ? reinterpret_cast<char *>(ret) - reinterpret_cast<char *>(s) + 1 7442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines : n; 7452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 7462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(dfsan_read_label(s, len), dfsan_union(s_label, c_label)); 7472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7502d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7512d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE char *__dfsw_strrchr(char *s, int c, 7522d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label s_label, 7532d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label c_label, 7542d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7552d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = strrchr(s, c); 7562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 7572d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = ret ? s_label : 0; 7582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 7592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 7602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(dfsan_read_label(s, strlen(s) + 1), 7612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(s_label, c_label)); 7622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7652d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7662d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE char *__dfsw_strstr(char *haystack, char *needle, 7682d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label haystack_label, 7692d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label needle_label, 7702d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7712d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *ret = strstr(haystack, needle); 7722d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (flags().strict_data_dependencies) { 7732d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = ret ? haystack_label : 0; 7742d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } else { 7752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines size_t len = ret ? ret + strlen(needle) - haystack : strlen(haystack) + 1; 7762d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 7772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(dfsan_read_label(haystack, len), 7782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(dfsan_read_label(needle, strlen(needle) + 1), 7792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_union(haystack_label, needle_label))); 7802d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7812d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7822d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE int __dfsw_nanosleep(const struct timespec *req, 7862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines struct timespec *rem, 7872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label req_label, 7882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label rem_label, 7892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 7902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = nanosleep(req, rem); 7912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 7922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == -1) { 7932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // Interrupted by a signal, rem is filled with the remaining time. 7942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, rem, sizeof(struct timespec)); 7952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 7962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 7972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 7982d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 7992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE int 8002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines__dfsw_socketpair(int domain, int type, int protocol, int sv[2], 8012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label domain_label, dfsan_label type_label, 8022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label protocol_label, dfsan_label sv_label, 8032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 8042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int ret = socketpair(domain, type, protocol, sv); 8052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 8062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (ret == 0) { 8072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_set_label(0, sv, sizeof(*sv) * 2); 8082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 8092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return ret; 8102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 8112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 8122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// Type of the trampoline function passed to the custom version of 8132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// dfsan_set_write_callback. 8142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinestypedef void (*write_trampoline_t)( 8152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void *callback, 8162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int fd, const void *buf, ssize_t count, 8172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label fd_label, dfsan_label buf_label, dfsan_label count_label); 8182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 8192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// Calls to dfsan_set_write_callback() set the values in this struct. 8202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// Calls to the custom version of write() read (and invoke) them. 8212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstatic struct { 8222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_trampoline_t write_callback_trampoline = NULL; 8232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void *write_callback = NULL; 8242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} write_callback_info; 8252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 8262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE void 8272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines__dfsw_dfsan_set_write_callback( 8282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_trampoline_t write_callback_trampoline, 8292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void *write_callback, 8302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label write_callback_label, 8312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label *ret_label) { 8322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_callback_info.write_callback_trampoline = write_callback_trampoline; 8332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_callback_info.write_callback = write_callback; 8342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 8352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 8362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_INTERFACE_ATTRIBUTE int 8372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines__dfsw_write(int fd, const void *buf, size_t count, 8382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label fd_label, dfsan_label buf_label, 8392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines dfsan_label count_label, dfsan_label *ret_label) { 8402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (write_callback_info.write_callback != NULL) { 8412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_callback_info.write_callback_trampoline( 8422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines write_callback_info.write_callback, 8432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines fd, buf, count, 8442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines fd_label, buf_label, count_label); 8452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 8462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 8472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *ret_label = 0; 8482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return write(fd, buf, count); 8492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 8506d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8516d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// Type used to extract a dfsan_label with va_arg() 8526d1862363c88c183b0ed7740fca876342cf0474bStephen Hinestypedef int dfsan_label_va; 8536d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8546d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// A chunk of data representing the output of formatting either a constant 8556d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// string or a single format directive. 8566d1862363c88c183b0ed7740fca876342cf0474bStephen Hinesstruct Chunk { 8576d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Address of the beginning of the formatted string 8586d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const char *ptr; 8596d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Size of the formatted string 8606d1862363c88c183b0ed7740fca876342cf0474bStephen Hines size_t size; 8616d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8626d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Type of DFSan label (depends on the format directive) 8636d1862363c88c183b0ed7740fca876342cf0474bStephen Hines enum { 8646d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Constant string, no argument and thus no label 8656d1862363c88c183b0ed7740fca876342cf0474bStephen Hines NONE = 0, 8666d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Label for an argument of '%n' 8676d1862363c88c183b0ed7740fca876342cf0474bStephen Hines IGNORED, 8686d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Label for a '%s' argument 8696d1862363c88c183b0ed7740fca876342cf0474bStephen Hines STRING, 8706d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Label for any other type of argument 8716d1862363c88c183b0ed7740fca876342cf0474bStephen Hines NUMERIC, 8726d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } label_type; 8736d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8746d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Value of the argument (if label_type == STRING) 8756d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const char *arg; 8766d1862363c88c183b0ed7740fca876342cf0474bStephen Hines}; 8776d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8786d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// Formats the input. The output is stored in 'str' starting from offset 8796d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// 'off'. The format directive is represented by the first 'format_size' bytes 8806d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// of 'format'. If 'has_size' is true, 'size' bounds the number of output 8816d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// bytes. Returns the return value of the vsnprintf call used to format the 8826d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// input. 8836d1862363c88c183b0ed7740fca876342cf0474bStephen Hinesstatic int format_chunk(char *str, size_t off, bool has_size, size_t size, 8846d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const char *format, size_t format_size, ...) { 8856d1862363c88c183b0ed7740fca876342cf0474bStephen Hines char *chunk_format = (char *) malloc(format_size + 1); 8866d1862363c88c183b0ed7740fca876342cf0474bStephen Hines assert(chunk_format); 8876d1862363c88c183b0ed7740fca876342cf0474bStephen Hines internal_memcpy(chunk_format, format, format_size); 8886d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk_format[format_size] = '\0'; 8896d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 8906d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_list ap; 8916d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_start(ap, format_size); 8926d1862363c88c183b0ed7740fca876342cf0474bStephen Hines int r = 0; 8936d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (has_size) { 8946d1862363c88c183b0ed7740fca876342cf0474bStephen Hines r = vsnprintf(str + off, off < size ? size - off : 0, chunk_format, ap); 8956d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 8966d1862363c88c183b0ed7740fca876342cf0474bStephen Hines r = vsprintf(str + off, chunk_format, ap); 8976d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 8986d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_end(ap); 8996d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9006d1862363c88c183b0ed7740fca876342cf0474bStephen Hines free(chunk_format); 9016d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return r; 9026d1862363c88c183b0ed7740fca876342cf0474bStephen Hines} 9036d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9046d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// Formats the input and propagates the input labels to the output. The output 9056d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// is stored in 'str'. If 'has_size' is true, 'size' bounds the number of 9066d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// output bytes. 'format' and 'ap' are the format string and the list of 9076d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// arguments for formatting. Returns the return value vsnprintf would return. 9086d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// 9096d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// The function tokenizes the format string in chunks representing either a 9106d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// constant string or a single format directive (e.g., '%.3f') and formats each 9116d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// chunk independently into the output string. This approach allows to figure 9126d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// out which bytes of the output string depends on which argument and thus to 9136d1862363c88c183b0ed7740fca876342cf0474bStephen Hines// propagate labels more precisely. 9146d1862363c88c183b0ed7740fca876342cf0474bStephen Hinesstatic int format_buffer(char *str, bool has_size, size_t size, 9156d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const char *format, dfsan_label *va_labels, 9166d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label *ret_label, va_list ap) { 9176d1862363c88c183b0ed7740fca876342cf0474bStephen Hines InternalMmapVector<Chunk> chunks(8); 9186d1862363c88c183b0ed7740fca876342cf0474bStephen Hines size_t off = 0; 9196d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9206d1862363c88c183b0ed7740fca876342cf0474bStephen Hines while (*format) { 9216d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunks.push_back(Chunk()); 9226d1862363c88c183b0ed7740fca876342cf0474bStephen Hines Chunk& chunk = chunks.back(); 9236d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.ptr = str + off; 9246d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.arg = nullptr; 9256d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9266d1862363c88c183b0ed7740fca876342cf0474bStephen Hines int status = 0; 9276d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9286d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (*format != '%') { 9296d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Ordinary character. Consume all the characters until a '%' or the end 9306d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // of the string. 9316d1862363c88c183b0ed7740fca876342cf0474bStephen Hines size_t format_size = 0; 9326d1862363c88c183b0ed7740fca876342cf0474bStephen Hines for (; *format && *format != '%'; ++format, ++format_size) {} 9336d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = format_chunk(str, off, has_size, size, format - format_size, 9346d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format_size); 9356d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NONE; 9366d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 9376d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Conversion directive. Consume all the characters until a conversion 9386d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // specifier or the end of the string. 9396d1862363c88c183b0ed7740fca876342cf0474bStephen Hines bool end_format = false; 9406d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#define FORMAT_CHUNK(t) \ 9416d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format_chunk(str, off, has_size, size, format - format_size, \ 9426d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format_size + 1, va_arg(ap, t)) 9436d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9446d1862363c88c183b0ed7740fca876342cf0474bStephen Hines for (size_t format_size = 1; *++format && !end_format; ++format_size) { 9456d1862363c88c183b0ed7740fca876342cf0474bStephen Hines switch (*format) { 9466d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'd': 9476d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'i': 9486d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'o': 9496d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'u': 9506d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'x': 9516d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'X': 9526d1862363c88c183b0ed7740fca876342cf0474bStephen Hines switch (*(format - 1)) { 9536d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'h': 9546d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Also covers the 'hh' case (since the size of the arg is still 9556d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // an int). 9566d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(int); 9576d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9586d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'l': 9596d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (format_size >= 2 && *(format - 2) == 'l') { 9606d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(long long int); 9616d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 9626d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(long int); 9636d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 9646d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9656d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'q': 9666d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(long long int); 9676d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9686d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'j': 9696d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(intmax_t); 9706d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9716d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'z': 9726d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(size_t); 9736d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9746d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 't': 9756d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(size_t); 9766d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9776d1862363c88c183b0ed7740fca876342cf0474bStephen Hines default: 9786d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(int); 9796d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 9806d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NUMERIC; 9816d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 9826d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 9836d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 9846d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'a': 9856d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'A': 9866d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'e': 9876d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'E': 9886d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'f': 9896d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'F': 9906d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'g': 9916d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'G': 9926d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (*(format - 1) == 'L') { 9936d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(long double); 9946d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 9956d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(double); 9966d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 9976d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NUMERIC; 9986d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 9996d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10006d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10016d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'c': 10026d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(int); 10036d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NUMERIC; 10046d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 10056d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10066d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10076d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 's': 10086d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.arg = va_arg(ap, char *); 10096d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = 10106d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format_chunk(str, off, has_size, size, 10116d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format - format_size, format_size + 1, 10126d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.arg); 10136d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::STRING; 10146d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 10156d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10166d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10176d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'p': 10186d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = FORMAT_CHUNK(void *); 10196d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NUMERIC; 10206d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 10216d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10226d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10236d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case 'n': 10246d1862363c88c183b0ed7740fca876342cf0474bStephen Hines *(va_arg(ap, int *)) = (int)off; 10256d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::IGNORED; 10266d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 10276d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10286d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10296d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case '%': 10306d1862363c88c183b0ed7740fca876342cf0474bStephen Hines status = format_chunk(str, off, has_size, size, 10316d1862363c88c183b0ed7740fca876342cf0474bStephen Hines format - format_size, format_size + 1); 10326d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.label_type = Chunk::NONE; 10336d1862363c88c183b0ed7740fca876342cf0474bStephen Hines end_format = true; 10346d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10356d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10366d1862363c88c183b0ed7740fca876342cf0474bStephen Hines default: 10376d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10386d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10396d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10406d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#undef FORMAT_CHUNK 10416d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10426d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10436d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (status < 0) { 10446d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return status; 10456d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10466d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10476d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // A return value of {v,}snprintf of size or more means that the output was 10486d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // truncated. 10496d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (has_size) { 10506d1862363c88c183b0ed7740fca876342cf0474bStephen Hines if (off < size) { 10516d1862363c88c183b0ed7740fca876342cf0474bStephen Hines size_t ustatus = (size_t) status; 10526d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.size = ustatus >= (size - off) ? 10536d1862363c88c183b0ed7740fca876342cf0474bStephen Hines ustatus - (size - off) : ustatus; 10546d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 10556d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.size = 0; 10566d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10576d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } else { 10586d1862363c88c183b0ed7740fca876342cf0474bStephen Hines chunk.size = status; 10596d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10606d1862363c88c183b0ed7740fca876342cf0474bStephen Hines off += status; 10616d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10626d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10636d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // TODO(martignlo): Decide how to combine labels (e.g., whether to ignore or 10646d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // not the label of the format string). 10656d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10666d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Label each output chunk according to the label supplied as argument to the 10676d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // function. We need to go through all the chunks and arguments even if the 10686d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // string was only partially printed ({v,}snprintf case). 10696d1862363c88c183b0ed7740fca876342cf0474bStephen Hines for (size_t i = 0; i < chunks.size(); ++i) { 10706d1862363c88c183b0ed7740fca876342cf0474bStephen Hines const Chunk& chunk = chunks[i]; 10716d1862363c88c183b0ed7740fca876342cf0474bStephen Hines void *chunk_ptr = const_cast<char *>(chunk.ptr); 10726d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10736d1862363c88c183b0ed7740fca876342cf0474bStephen Hines switch (chunk.label_type) { 10746d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case Chunk::NONE: 10756d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_set_label(0, chunk_ptr, chunk.size); 10766d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10776d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case Chunk::IGNORED: 10786d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_labels++; 10796d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_set_label(0, chunk_ptr, chunk.size); 10806d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10816d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case Chunk::NUMERIC: { 10826d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label label = *va_labels++; 10836d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_set_label(label, chunk_ptr, chunk.size); 10846d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10856d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10866d1862363c88c183b0ed7740fca876342cf0474bStephen Hines case Chunk::STRING: { 10876d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Consume the label of the pointer to the string 10886d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_labels++; 10896d1862363c88c183b0ed7740fca876342cf0474bStephen Hines internal_memcpy(shadow_for(chunk_ptr), 10906d1862363c88c183b0ed7740fca876342cf0474bStephen Hines shadow_for(chunk.arg), 10916d1862363c88c183b0ed7740fca876342cf0474bStephen Hines sizeof(dfsan_label) * (strlen(chunk.arg))); 10926d1862363c88c183b0ed7740fca876342cf0474bStephen Hines break; 10936d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10946d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10956d1862363c88c183b0ed7740fca876342cf0474bStephen Hines } 10966d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10976d1862363c88c183b0ed7740fca876342cf0474bStephen Hines *ret_label = 0; 10986d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 10996d1862363c88c183b0ed7740fca876342cf0474bStephen Hines // Number of bytes written in total. 11006d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return off; 11016d1862363c88c183b0ed7740fca876342cf0474bStephen Hines} 11026d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 11036d1862363c88c183b0ed7740fca876342cf0474bStephen HinesSANITIZER_INTERFACE_ATTRIBUTE 11046d1862363c88c183b0ed7740fca876342cf0474bStephen Hinesint __dfsw_sprintf(char *str, const char *format, dfsan_label str_label, 11056d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label format_label, dfsan_label *va_labels, 11066d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label *ret_label, ...) { 11076d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_list ap; 11086d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_start(ap, ret_label); 11096d1862363c88c183b0ed7740fca876342cf0474bStephen Hines int ret = format_buffer(str, false, 0, format, va_labels, ret_label, ap); 11106d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_end(ap); 11116d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return ret; 11126d1862363c88c183b0ed7740fca876342cf0474bStephen Hines} 11136d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 11146d1862363c88c183b0ed7740fca876342cf0474bStephen HinesSANITIZER_INTERFACE_ATTRIBUTE 11156d1862363c88c183b0ed7740fca876342cf0474bStephen Hinesint __dfsw_snprintf(char *str, size_t size, const char *format, 11166d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label str_label, dfsan_label size_label, 11176d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label format_label, dfsan_label *va_labels, 11186d1862363c88c183b0ed7740fca876342cf0474bStephen Hines dfsan_label *ret_label, ...) { 11196d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_list ap; 11206d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_start(ap, ret_label); 11216d1862363c88c183b0ed7740fca876342cf0474bStephen Hines int ret = format_buffer(str, true, size, format, va_labels, ret_label, ap); 11226d1862363c88c183b0ed7740fca876342cf0474bStephen Hines va_end(ap); 11236d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return ret; 11246d1862363c88c183b0ed7740fca876342cf0474bStephen Hines} 11256e4c46dc162803cc99c2a5e068fc28adb873a431Peter Collingbourne} 1126