luzer: reserve and handoff ctrs to lf #2
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Until now, luzer had not used at all coverage information for interpreted code. Hook-based instrumentation collected data, but it were never passed to libfuzzer to drew features from. Memory always were allocated in a fixed default kMax... size. This commit includes a fix to properly pass counters to libfuzzer, two systems to approximate optimal amount of 8-bit counters: one based on testing, pre-run phase, and one based on active bytecode size. Also, a minor fix to signal handling. Fixes ligurio#12
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Until now, luzer had not used at all coverage information for interpreted code. Hook-based instrumentation collected data, but it were never passed to libfuzzer to drew features from. Memory always were allocated in a fixed default kMax... size. This commit includes a fix to properly pass counters to libfuzzer, two systems to approximate optimal amount of 8-bit counters: one based on testing, pre-run phase, and one based on active bytecode size. Also, a minor fix to signal handling.
Fixes ligurio#12