Fangrui Song fc0bd3c2ce [libFuzzer] Refactor GetNextInstructionPc/GetPreviousInstructionPc ...

Port the change to compiler-rt/lib/fuzzer/FuzzerTracePC.cpp .
Update RISCV to use PC-2: this is coarse (C extension may be disabled) but
sufficient for pure symbolization purpose.

The commit is separate from D120362 so that bisecting/reverting is easier.

2022-02-22 16:25:57 -08:00

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