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Make the required changes to the BSD executor file to interface with
FreeBSD's kernel coverage implementation. This will allow coverage to be
used when running syzkaller on this platform.
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1. mmap all memory always, without explicit mmap calls in the program.
This makes lots of things much easier and removes lots of code.
Makes mmap not a special syscall and allows to fuzz without mmap enabled.
2. Change address assignment algorithm.
Current algorithm allocates unmapped addresses too frequently
and allows collisions between arguments of a single syscall.
The new algorithm analyzes actual allocations in the program
and places new arguments at unused locations.
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The "define uint64_t unsigned long long" were too good to work.
With a different toolchain I am getting:
cstdint:69:11: error: expected unqualified-id
using ::uint64_t;
^
executor/common.h:34:18: note: expanded from macro 'uint64_t'
Do it the proper way: introduce uint64/32/16/8 types and use them.
pkg/csource then does s/uint64/uint64_t/ to not clutter code with
additional typedefs.
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RLIMIT_AS auses frequent random aborts on netbsd.
Reason unknown. Disable it for now.
Documentation says that __syscall should be used
for syscalls with 64-bit arguments. On amd64 most
syscalls have 64-bit arguments (incl mmap),
so switch to it.
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executor_netbsd.cc was including syscalls_freebsd.h,
which completely messed up syscall numbers and names.
Include the right syscalls header.
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mkdtemp return NULL on failure.
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This just makes make TARGETOS=netbsd succeed.
We don't yet have prog target for netbsd.
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