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Finally get Linux compiling

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This commit is contained in:
wuggy 2026-04-16 16:56:33 -04:00
commit 680611c8cf
1 changed files with 30 additions and 25 deletions
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57
js/src/jsmath.cpp
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@ -702,40 +702,45 @@ js::math_pow(JSContext* cx, unsigned argc, Value* vp)
return true;
}
namespace js {
uint64_t
js::GenerateRandomSeed()
GenerateRandomSeed()
{
uint64_t seed = 0;
#if defined(XP_WIN)
MOZ_ALWAYS_TRUE(RtlGenRandom(&seed, sizeof(seed)));
#elif defined(HAVE_ARC4RANDOM)
seed = (static_cast<uint64_t>(arc4random()) << 32) | arc4random();
#elif defined(XP_UNIX)
bool done = false;
# if defined(__linux__)
// Try the relatively new getrandom syscall first. It's the preferred way
// on Linux as /dev/urandom may not work inside chroots and is harder to
// sandbox (see bug 995069).
int ret = syscall(SYS_getrandom, &seed, sizeof(seed), GRND_NONBLOCK);
done = (ret == sizeof(seed));
# endif
if (!done) {
int fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
mozilla::Unused << read(fd, static_cast<void*>(&seed), sizeof(seed));
close(fd);
}
#if defined(__linux__)
// Linux does not provide arc4random(), so use /dev/urandom.
int fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
ssize_t n = read(fd, &seed, sizeof(seed));
close(fd);
if (n == sizeof(seed))
return seed;
}
#else
# error "Platform needs to implement GenerateRandomSeed()"
#endif
// Also mix in PRMJ_Now() in case we couldn't read random bits from the OS.
uint64_t timestamp = PRMJ_Now();
return seed ^ timestamp ^ (timestamp << 32);
// Fallback if /dev/urandom fails
uint32_t lo = random();
uint32_t hi = random();
return (static_cast<uint64_t>(hi) << 32) | lo;
#elif defined(HAVE_ARC4RANDOM)
// BSD / macOS path
uint32_t lo = arc4random();
uint32_t hi = arc4random();
return (static_cast<uint64_t>(hi) << 32) | lo;
#else
// Generic fallback
uint32_t lo = random();
uint32_t hi = random();
return (static_cast<uint64_t>(hi) << 32) | lo;
#endif
}
} // namespace js
void
js::GenerateXorShift128PlusSeed(mozilla::Array<uint64_t, 2>& seed)
{