Re: [Xen-devel] [PATCH 08/14] fuzz/x86_emulate: Add 'afl-cov' target

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Aug 25, 2017 at 05:43:37PM +0100, George Dunlap wrote:
> diff --git a/tools/fuzz/x86_instruction_emulator/Makefile 
> b/tools/fuzz/x86_instruction_emulator/Makefile
> index 10009dc08f..629e191029 100644
> --- a/tools/fuzz/x86_instruction_emulator/Makefile
> +++ b/tools/fuzz/x86_instruction_emulator/Makefile
> @@ -23,19 +23,33 @@ x86_emulate_user.c x86_emulate_user.h: %:
>  
>  CFLAGS += $(CFLAGS_xeninclude) -D__XEN_TOOLS__ -I.
>  
> +GCOV_FLAGS=--coverage
> +
>  x86.h := asm/x86-vendors.h asm/x86-defns.h asm/msr-index.h
>  x86_emulate.h := x86_emulate_user.h x86_emulate/x86_emulate.h $(x86.h)
>  
>  x86_emulate_user.o: x86_emulate_user.c x86_emulate/x86_emulate.c 
> $(x86_emulate.h)
>  
> +x86_emulate_user-cov.o: x86_emulate_user.c x86_emulate/x86_emulate.c 
> $(x86_emulate.h)
> +     $(CC) -c $(CFLAGS) $(GCOV_FLAGS) -o $@ x86_emulate_user.c
> +
>  fuzz-emul.o: $(x86_emulate.h)
>  
> +fuzz-emul-cov.o: fuzz-emul.c $(x86_emulate.h)
> +     $(CC) -c $(CFLAGS) $(GCOV_FLAGS) -o $@ fuzz-emul.c
> +
> +afl-harness-cov.o: afl-harness.c
> +     $(CC) -c $(CFLAGS) $(GCOV_FLAGS) $^ -o $@
> +
>  x86-insn-fuzzer.a: fuzz-emul.o x86_emulate_user.o
>       $(AR) rc $@ $^
>  
>  afl-harness: afl-harness.o fuzz-emul.o x86_emulate_user.o
>       $(CC) $(CFLAGS) $^ -o $@
>  
> +afl-harness-cov: afl-harness-cov.o fuzz-emul-cov.o x86_emulate_user-cov.o
> +     $(CC) $(CFLAGS) $(GCOV_FLAGS) $^ -o $@
> +

Also it is possible to use pattern rules to simplify targets. But given
this is a rather small program I won't insist on using using pattern
rules.

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