clang++ caught a runtime bug in sampread

4e128e19 · Silas Boyd-Wickizer · 9601d0f9 · 4e128e19
--- a/sampler.cc
+++ b/sampler.cc
@@ -181,11 +181,13 @@ sampread(struct inode *ip, char *dst, u32 off, u32 n)
    if (hdr == NULL)
      return -1;
    hdr->ncpus = NCPU;
+    i = 0;
    for (p = &pmulog[0]; p != q; p++) {
      u64 sz = p->count * sizeof(struct pmuevent);
      hdr->cpu[i].offset = len;
      hdr->cpu[i].size = sz;
      len += sz;
+      i++;
    }

    cc = MIN(hdrlen-off, n);