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| author | Dmitry Vyukov <dvyukov@google.com> | 2018-02-19 19:35:04 +0100 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2018-02-19 21:48:20 +0100 |
| commit | 75a7c5e2d1f09a4a58e7e1f1f4ef0b0f55a33413 (patch) | |
| tree | d44c2457c44b53192005f0b89cd6633a2a2b0ff9 /executor/executor_akaros.cc | |
| parent | 90fd6503136121e9494761a460898e83bc0b6b3e (diff) | |
prog: rework address allocation
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.
Diffstat (limited to 'executor/executor_akaros.cc')
| -rw-r--r-- | executor/executor_akaros.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/executor/executor_akaros.cc b/executor/executor_akaros.cc index 90b589e77..fc28fb8f7 100644 --- a/executor/executor_akaros.cc +++ b/executor/executor_akaros.cc @@ -12,6 +12,8 @@ #include "syscalls_akaros.h" +#include <sys/mman.h> + uint32 output; int main(int argc, char** argv) @@ -21,6 +23,10 @@ int main(int argc, char** argv) return 0; } + if (mmap((void*)SYZ_DATA_OFFSET, SYZ_NUM_PAGES * SYZ_PAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0) != (void*)SYZ_DATA_OFFSET) + fail("mmap of data segment failed"); + use_temporary_dir(); install_segv_handler(); setup_control_pipes(); |