[Xen-devel] [PATCH v2 06/13] fuzz/x86_emulate: Rename the file containing the wrapper code

[George Dunlap <george.dunlap@xxxxxxxxxx>]

When generating coverage output, by default gcov generates output
filenames based only on the coverage file and the "leaf" source file,
not the full path.  As a result, it uses the same name for
x86_emulate.c and x86_emulate/x86_emulate.c, generally overwriting the
second (which we actually are about) with the first (which is just a
wrapper).

Rename the user-space wrapper helpers to x86_emulate_user.[ch], so
that it generates separate files.

There is actually an option to gcov, `--preserve-paths`, which will
cause the full path name to be included in the filename, properly
distinguishing between the two.  However, given that the user-space
wrapper doesn't actually do any emulation (and the poor state of gcov
documentation making it difficult to find the option in the first
place), it seems to make more sense to rename the file anyway.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---

NB: I discovered the `-p` option to gcov after writing this patch.
But I think the patch itself still makes sense.

CC: Ian Jackson <ian.jackson@xxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: Jan Beulich <jbeulich@xxxxxxxx>
---
 tools/fuzz/x86_instruction_emulator/Makefile                 | 12 ++++++------
 tools/fuzz/x86_instruction_emulator/fuzz-emul.c              |  2 +-
 tools/tests/x86_emulator/Makefile                            |  6 +++---
 tools/tests/x86_emulator/test_x86_emulator.c                 |  2 +-
 .../tests/x86_emulator/{x86_emulate.c => x86_emulate_user.c} |  2 +-
 .../tests/x86_emulator/{x86_emulate.h => x86_emulate_user.h} |  0
 6 files changed, 12 insertions(+), 12 deletions(-)
 rename tools/tests/x86_emulator/{x86_emulate.c => x86_emulate_user.c} (99%)
 rename tools/tests/x86_emulator/{x86_emulate.h => x86_emulate_user.h} (100%)

diff --git a/tools/fuzz/x86_instruction_emulator/Makefile 
b/tools/fuzz/x86_instruction_emulator/Makefile
index a3f6b2c754..10009dc08f 100644
--- a/tools/fuzz/x86_instruction_emulator/Makefile
+++ b/tools/fuzz/x86_instruction_emulator/Makefile
@@ -18,22 +18,22 @@ asm:
 
 asm/%: asm ;
 
-x86_emulate.c x86_emulate.h: %:
+x86_emulate_user.c x86_emulate_user.h: %:
        [ -L $* ] || ln -sf $(XEN_ROOT)/tools/tests/x86_emulator/$*
 
 CFLAGS += $(CFLAGS_xeninclude) -D__XEN_TOOLS__ -I.
 
 x86.h := asm/x86-vendors.h asm/x86-defns.h asm/msr-index.h
-x86_emulate.h := x86_emulate.h x86_emulate/x86_emulate.h $(x86.h)
+x86_emulate.h := x86_emulate_user.h x86_emulate/x86_emulate.h $(x86.h)
 
-x86_emulate.o: x86_emulate.c x86_emulate/x86_emulate.c $(x86_emulate.h)
+x86_emulate_user.o: x86_emulate_user.c x86_emulate/x86_emulate.c 
$(x86_emulate.h)
 
 fuzz-emul.o: $(x86_emulate.h)
 
-x86-insn-fuzzer.a: fuzz-emul.o x86_emulate.o
+x86-insn-fuzzer.a: fuzz-emul.o x86_emulate_user.o
        $(AR) rc $@ $^
 
-afl-harness: afl-harness.o fuzz-emul.o x86_emulate.o
+afl-harness: afl-harness.o fuzz-emul.o x86_emulate_user.o
        $(CC) $(CFLAGS) $^ -o $@
 
 # Common targets
@@ -42,7 +42,7 @@ all: x86-insn-fuzz-all
 
 .PHONY: distclean
 distclean: clean
-       rm -f x86_emulate x86_emulate.c x86_emulate.h asm
+       rm -f x86_emulate x86_emulate_user.c x86_emulate_user.h asm
 
 .PHONY: clean
 clean:
diff --git a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c 
b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
index 92684cf088..dc180b070c 100644
--- a/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
+++ b/tools/fuzz/x86_instruction_emulator/fuzz-emul.c
@@ -15,7 +15,7 @@
 #include <unistd.h>
 #include <xen/xen.h>
 
-#include "x86_emulate.h"
+#include "x86_emulate_user.h"
 
 #define MSR_INDEX_MAX 16
 
diff --git a/tools/tests/x86_emulator/Makefile 
b/tools/tests/x86_emulator/Makefile
index fd13ab53b1..888495a6a2 100644
--- a/tools/tests/x86_emulator/Makefile
+++ b/tools/tests/x86_emulator/Makefile
@@ -75,7 +75,7 @@ $(addsuffix .h,$(TESTCASES)): %.h: %.c testcase.mk Makefile
 $(addsuffix .c,$(SIMD)) $(addsuffix -avx.c,$(filter sse%,$(SIMD))):
        ln -sf simd.c $@
 
-$(TARGET): x86_emulate.o test_x86_emulator.o
+$(TARGET): x86_emulate_user.o test_x86_emulator.o
        $(HOSTCC) -o $@ $^
 
 .PHONY: clean
@@ -101,9 +101,9 @@ asm/%: asm ;
 HOSTCFLAGS += $(CFLAGS_xeninclude) -I.
 
 x86.h := asm/x86-vendors.h asm/x86-defns.h asm/msr-index.h
-x86_emulate.h := x86_emulate.h x86_emulate/x86_emulate.h $(x86.h)
+x86_emulate.h := x86_emulate_user.h x86_emulate/x86_emulate.h $(x86.h)
 
-x86_emulate.o: x86_emulate.c x86_emulate/x86_emulate.c $(x86_emulate.h)
+x86_emulate_user.o: x86_emulate_user.c x86_emulate/x86_emulate.c 
$(x86_emulate.h)
        $(HOSTCC) $(HOSTCFLAGS) -D__XEN_TOOLS__ -c -g -o $@ $<
 
 test_x86_emulator.o: test_x86_emulator.c $(addsuffix .h,$(TESTCASES)) 
$(x86_emulate.h)
diff --git a/tools/tests/x86_emulator/test_x86_emulator.c 
b/tools/tests/x86_emulator/test_x86_emulator.c
index 4371e467e6..4d9c781610 100644
--- a/tools/tests/x86_emulator/test_x86_emulator.c
+++ b/tools/tests/x86_emulator/test_x86_emulator.c
@@ -3,7 +3,7 @@
 #include <stdio.h>
 #include <sys/mman.h>
 
-#include "x86_emulate.h"
+#include "x86_emulate_user.h"
 #include "blowfish.h"
 #include "sse.h"
 #include "sse2.h"
diff --git a/tools/tests/x86_emulator/x86_emulate.c 
b/tools/tests/x86_emulator/x86_emulate_user.c
similarity index 99%
rename from tools/tests/x86_emulator/x86_emulate.c
rename to tools/tests/x86_emulator/x86_emulate_user.c
index 79661d5c2b..adae6950c8 100644
--- a/tools/tests/x86_emulator/x86_emulate.c
+++ b/tools/tests/x86_emulator/x86_emulate_user.c
@@ -1,4 +1,4 @@
-#include "x86_emulate.h"
+#include "x86_emulate_user.h"
 
 #include <sys/mman.h>
 
diff --git a/tools/tests/x86_emulator/x86_emulate.h 
b/tools/tests/x86_emulator/x86_emulate_user.h
similarity index 100%
rename from tools/tests/x86_emulator/x86_emulate.h
rename to tools/tests/x86_emulator/x86_emulate_user.h
-- 
2.14.1


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