[PATCH] [SanitizerCoverage] Implement user-friendly -fsanitize-coverage= flags.
Alexey Samsonov
vonosmas at gmail.com
Thu May 7 14:17:27 PDT 2015
Hi kcc,
Possible coverage levels are:
* -fsanitize-coverage=func - function-level coverage
* -fsanitize-coverage=bb - basic-block-level coverage
* -fsanitize-coverage=edge - edge-level coverage
Extra features are:
* -fsanitize-coverage=indirect-calls - coverage for indirect calls
* -fsanitize-coverage=trace-bb - tracing for basic blocks
* -fsanitize-coverage=trace-cmp - tracing for cmp instructions
* -fsanitize-coverage=8bit-counters - frequency counters
Levels and features can be combined in comma-separated list, and
can be disabled by subsequent -fno-sanitize-coverage= flags, e.g.:
-fsanitize-coverage=bb,trace-bb,8-bit-counters -fno-sanitize-coverage=trace-bb
is equivalient to:
-fsanitize-coverage=bb,trace-bb
Original semantics of -fsanitize-coverage flag is preserved:
* -fsanitize-coverage=0 disables the coverage
* -fsanitize-coverage=1 is a synonym for -fsanitize-coverage=func
* -fsanitize-coverage=2 is a synonym for -fsanitize-coverage=bb
* -fsanitize-coverage=3 is a synonym for -fsanitize-coverage=edge
* -fsanitize-coverage=4 is a synonym for -fsanitize-coverage=edge,indirect-calls
Driver tries to diagnose invalid flag usage, in particular:
* At most one level (func,bb,edge) must be specified.
* "trace-bb" and "8bit-counters" features require some level to be specified.
See test case for more examples.
http://reviews.llvm.org/D9577
Files:
include/clang/Driver/Options.td
include/clang/Driver/SanitizerArgs.h
lib/CodeGen/BackendUtil.cpp
lib/Driver/SanitizerArgs.cpp
test/Driver/fsanitize-coverage.c
EMAIL PREFERENCES
http://reviews.llvm.org/settings/panel/emailpreferences/
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