diff -urN binutils-2.31_orig/gold/plugin.cc binutils-2.31/gold/plugin.cc --- binutils-2.31_orig/gold/plugin.cc 2018-06-24 21:38:57.000000000 +0300 +++ binutils-2.31/gold/plugin.cc 2018-07-16 20:11:40.006832100 +0300 @@ -502,6 +502,117 @@ FILE* logfile_; }; +/* Use the widest available unsigned type if uint64_t is not + available. The algorithm below extracts a number less than 62**6 + (approximately 2**35.725) from uint64_t, so ancient hosts where + uintmax_t is only 32 bits lose about 3.725 bits of randomness, + which is better than not having mkstemp at all. */ +#if !defined UINT64_MAX && !defined uint64_t +# define uint64_t uintmax_t +#endif + +/* These are the characters used in temporary filenames. */ +static const char letters[] = +"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; + +/* Generate a temporary file name based on TMPL. TMPL must match the + rules for mk[s]temp (i.e. end in "XXXXXX"). The name constructed + does not exist at the time of the call to __gen_tempname. TMPL is + overwritten with the result. + + KIND is: + __GT_DIR: create a directory, which will be mode 0700. + + We use a clever algorithm to get hard-to-predict names. */ +static int +gen_tempname (char *tmpl) +{ + int len; + char *XXXXXX; + static uint64_t value; + uint64_t random_time_bits; + int count, fd = -1; + int save_errno = errno; + + len = (int) strlen(tmpl); + if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX")) + { + errno = EINVAL; + return -1; + } + + /* This is where the Xs start. */ + XXXXXX = &tmpl[len - 6]; + +/* Get some more or less random data. */ + { + SYSTEMTIME stNow; + FILETIME ftNow; + + // get system time + GetSystemTime(&stNow); + stNow.wMilliseconds = 500; + if (!SystemTimeToFileTime(&stNow, &ftNow)) + { + errno = -1; + return -1; + } + + random_time_bits = (((uint64_t)ftNow.dwHighDateTime << 32) + | (uint64_t)ftNow.dwLowDateTime); + } + value += (random_time_bits << 8) ^ getpid (); + + for (count = 0; count < TMP_MAX; value += 7777, ++count) + { + uint64_t v = value; + + /* Fill in the random bits. */ + XXXXXX[0] = letters[v % 62]; + v /= 62; + XXXXXX[1] = letters[v % 62]; + v /= 62; + XXXXXX[2] = letters[v % 62]; + v /= 62; + XXXXXX[3] = letters[v % 62]; + v /= 62; + XXXXXX[4] = letters[v % 62]; + v /= 62; + XXXXXX[5] = letters[v % 62]; + + fd = mkdir (tmpl); + + if (fd >= 0) + { + errno = save_errno; + return fd; + } + else if (errno != EEXIST) + return -1; + } + + /* We got out of the loop because we ran out of combinations to try. */ + errno = EEXIST; + return -1; +} + +/* Generate a unique temporary directory from TEMPLATE. + The last six characters of TEMPLATE must be "XXXXXX"; + they are replaced with a string that makes the filename unique. + The directory is created, mode 700, and its name is returned. + (This function comes from OpenBSD.) */ +char * +mkdtemp (char *Template) +#ifdef __cplusplus + throw() +#endif +{ + if (gen_tempname (Template)) + return NULL; + else + return Template; +} + bool Plugin_recorder::init() { @@ -562,8 +673,10 @@ { static char buf[4096]; +#ifndef _WIN32 if (::link(inname, outname) == 0) return true; +#endif int in = ::open(inname, O_RDONLY); if (in < 0)