atomic_bug.c

   heap->occupy_bmap[0] = 0x01;

/* becomes
 598     .loc    2 134 3 is_stmt 1       ## lookup_helper_test.c:134:3
 599     leaq    72(%r13), %rsi
 600     .loc    2 134 24 is_stmt 0      ## lookup_helper_test.c:134:24
 601     movq    $1, -56(%rbp)
 602     leaq    -56(%rbp), %rdx
 603     movl    $8, %edi
 604     movl    $5, %ecx
 605     callq   ___atomic_store
 */