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Make fidlgen non special and run go generate for all packages.
This will avoid stale go:generate commands, and missed packages
(like we had for pkg/ifuzz/{x86,arm64} for years).
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Make MakeMmap return more than 1 call.
This is a preparation for future changes.
Also remove addr/size as they are effectively
always the same and can be inferred from the target
(will also conflict with the future changes).
Also rename to MakeDataMmap to better represent
the new purpose: it's just some arbitrary mmap,
but rather mapping of the data segment.
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Currently target binaries contain support for all OS/arch combinations.
However, obviously a fuchsia target binary won't test windows.
For target binaries we need support only for a single target
(with the exception of 386/arm target in amd64/arm64 binaries).
So compile in only _the_ target into target binaries.
This reduces akaros/amd64 fuzzer binary from 33 to 7 MB
and execprog from 28 to 2 MB.
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Update #538
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Move generated files to gen subdir. This allows to:
1. Rebuild init.go without rebuilding generated code.
2. Excluding generated files from gometalinter checking.
This makes faster and consume less memory.
Update #538
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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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Nothing works, but builds.
Update #191
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