rt: Eliminate the dependency on rust_kernel from rust_rng

1 files changed, 27 insertions, 23 deletions

diff --git a/src/rt/rust_rng.cpp b/src/rt/rust_rng.cpp
index d55f9b5f2bc..27015891fee 100644
--- a/src/rt/rust_rng.cpp
+++ b/src/rt/rust_rng.cpp
@@ -41,7 +41,7 @@ rng_seed_size() {
 // Initialization helpers for ISAAC RNG
 
 void
-rng_gen_seed(rust_kernel* kernel, uint8_t* dest, size_t size) {
+rng_gen_seed(uint8_t* dest, size_t size) {
 #ifdef __WIN32__
     HCRYPTPROV hProv;
     win32_require
@@ -54,31 +54,37 @@ rng_gen_seed(rust_kernel* kernel, uint8_t* dest, size_t size) {
         (_T("CryptReleaseContext"), CryptReleaseContext(hProv, 0));
 #else
     int fd = open("/dev/urandom", O_RDONLY);
-    if (fd == -1)
-        kernel->fatal("error opening /dev/urandom: %s", strerror(errno));
+    if (fd == -1) {
+        fprintf(stderr, "error opening /dev/urandom: %s", strerror(errno));
+        abort();
+    }
     size_t amount = 0;
     do {
         ssize_t ret = read(fd, dest+amount, size-amount);
-        if (ret < 0)
-            kernel->fatal("error reading /dev/urandom: %s", strerror(errno));
-        else if (ret == 0)
-            kernel->fatal("somehow hit eof reading from /dev/urandom");
+        if (ret < 0) {
+            fprintf(stderr, "error reading /dev/urandom: %s", strerror(errno));
+            abort();
+        }
+        else if (ret == 0) {
+            fprintf(stderr, "somehow hit eof reading from /dev/urandom");
+            abort();
+        }
         amount += (size_t)ret;
     } while (amount < size);
     int ret = close(fd);
-    // FIXME #3697: Why does this fail sometimes?
-    if (ret != 0)
-        kernel->log(log_warn, "error closing /dev/urandom: %s",
-            strerror(errno));
+    if (ret != 0) {
+        fprintf(stderr, "error closing /dev/urandom: %s", strerror(errno));
+        // FIXME #3697: Why does this fail sometimes?
+        // abort();
+    }
 #endif
 }
 
 static void
-isaac_init(rust_kernel *kernel, randctx *rctx,
+isaac_init(randctx *rctx, char *env_seed,
            uint8_t* user_seed, size_t seed_len) {
     memset(rctx, 0, sizeof(randctx));
 
-    char *env_seed = kernel->env->rust_seed;
     if (user_seed != NULL) {
         // ignore bytes after the required length
         if (seed_len > sizeof(rctx->randrsl)) {
@@ -92,8 +98,7 @@ isaac_init(rust_kernel *kernel, randctx *rctx,
             seed = (seed + 0x7ed55d16) + (seed << 12);
         }
     } else {
-        rng_gen_seed(kernel,
-                     (uint8_t*)&rctx->randrsl,
+        rng_gen_seed((uint8_t*)&rctx->randrsl,
                      sizeof(rctx->randrsl));
     }
 
@@ -101,14 +106,14 @@ isaac_init(rust_kernel *kernel, randctx *rctx,
 }
 
 void
-rng_init(rust_kernel* kernel, rust_rng* rng,
+rng_init(rust_rng* rng, char* env_seed,
          uint8_t *user_seed, size_t seed_len) {
-    isaac_init(kernel, &rng->rctx, user_seed, seed_len);
-    rng->reseedable = !user_seed && !kernel->env->rust_seed;
+    isaac_init(&rng->rctx, env_seed, user_seed, seed_len);
+    rng->reseedable = !user_seed && !env_seed;
 }
 
 static void
-rng_maybe_reseed(rust_kernel* kernel, rust_rng* rng) {
+rng_maybe_reseed(rust_rng* rng) {
     // If this RNG has generated more than 32KB of random data and was not
     // seeded by the user or RUST_SEED, then we should reseed now.
     const size_t RESEED_THRESHOLD = 32 * 1024;
@@ -116,16 +121,15 @@ rng_maybe_reseed(rust_kernel* kernel, rust_rng* rng) {
     if (bytes_generated < RESEED_THRESHOLD || !rng->reseedable) {
         return;
     }
-    rng_gen_seed(kernel,
-                 (uint8_t*)rng->rctx.randrsl,
+    rng_gen_seed((uint8_t*)rng->rctx.randrsl,
                  sizeof(rng->rctx.randrsl));
     randinit(&rng->rctx, 1);
 }
 
 uint32_t
-rng_gen_u32(rust_kernel* kernel, rust_rng* rng) {
+rng_gen_u32(rust_rng* rng) {
     uint32_t x = isaac_rand(&rng->rctx);
-    rng_maybe_reseed(kernel, rng);
+    rng_maybe_reseed(rng);
     return x;
 }