[PULL 26/40] tests/tcg: make test-mmap a little less aggressive

["Alex Bennée" <alex.bennee@linaro.org>]

The check_aligned_anonymous_unfixed_mmaps and
check_aligned_anonymous_unfixed_colliding_mmaps do a lot of mmap's and
copying of data. This is especially unfriendly to targets like hexagon
which have quite large pages and need to do sanity checks on each
memory access.

While we are at it clean-up the white space and style issues from the
legacy code. As we no longer do quite so much needless memory access
we can also remove the hexagon timeout hack.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20210709143005.1554-27-alex.bennee@linaro.org>

diff --git a/tests/tcg/multiarch/test-mmap.c b/tests/tcg/multiarch/test-mmap.c
index 11d0e777b1..96257f8ebe 100644
--- a/tests/tcg/multiarch/test-mmap.c
+++ b/tests/tcg/multiarch/test-mmap.c
@@ -49,64 +49,62 @@ size_t test_fsize;
 
 void check_aligned_anonymous_unfixed_mmaps(void)
 {
-	void *p1;
-	void *p2;
-	void *p3;
-	void *p4;
-	void *p5;
-	uintptr_t p;
-	int i;
-
-	fprintf(stdout, "%s", __func__);
-	for (i = 0; i < 0x1fff; i++)
-	{
-		size_t len;
-
-		len = pagesize + (pagesize * i & 7);
-		p1 = mmap(NULL, len, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		p2 = mmap(NULL, len, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		p3 = mmap(NULL, len, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		p4 = mmap(NULL, len, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		p5 = mmap(NULL, len, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-
-		/* Make sure we get pages aligned with the pagesize. The
-		   target expects this.  */
-		fail_unless (p1 != MAP_FAILED);
-		fail_unless (p2 != MAP_FAILED);
-		fail_unless (p3 != MAP_FAILED);
-		fail_unless (p4 != MAP_FAILED);
-		fail_unless (p5 != MAP_FAILED);
-		p = (uintptr_t) p1;
-		D(printf ("p=%x\n", p));
-		fail_unless ((p & pagemask) == 0);
-		p = (uintptr_t) p2;
-		fail_unless ((p & pagemask) == 0);
-		p = (uintptr_t) p3;
-		fail_unless ((p & pagemask) == 0);
-		p = (uintptr_t) p4;
-		fail_unless ((p & pagemask) == 0);
-		p = (uintptr_t) p5;
-		fail_unless ((p & pagemask) == 0);
-
-		/* Make sure we can read from the entire area.  */
-		memcpy (dummybuf, p1, pagesize);
-		memcpy (dummybuf, p2, pagesize);
-		memcpy (dummybuf, p3, pagesize);
-		memcpy (dummybuf, p4, pagesize);
-		memcpy (dummybuf, p5, pagesize);
-
-		munmap (p1, len);
-		munmap (p2, len);
-		munmap (p3, len);
-		munmap (p4, len);
-		munmap (p5, len);
-	}
-	fprintf(stdout, " passed\n");
+    void *p1;
+    void *p2;
+    void *p3;
+    void *p4;
+    void *p5;
+    uintptr_t p;
+    int i;
+    fprintf(stdout, "%s", __func__);
+    for (i = 0; i < 8; i++) {
+        size_t len;
+        len = pagesize + (pagesize * i);
+        p1 = mmap(NULL, len, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        p2 = mmap(NULL, len, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        p3 = mmap(NULL, len, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        p4 = mmap(NULL, len, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        p5 = mmap(NULL, len, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+
+        /*
+         * Make sure we get pages aligned with the pagesize. The
+         * target expects this.
+         */
+        fail_unless(p1 != MAP_FAILED);
+        fail_unless(p2 != MAP_FAILED);
+        fail_unless(p3 != MAP_FAILED);
+        fail_unless(p4 != MAP_FAILED);
+        fail_unless(p5 != MAP_FAILED);
+        p = (uintptr_t) p1;
+        D(printf("p=%x\n", p));
+        fail_unless((p & pagemask) == 0);
+        p = (uintptr_t) p2;
+        fail_unless((p & pagemask) == 0);
+        p = (uintptr_t) p3;
+        fail_unless((p & pagemask) == 0);
+        p = (uintptr_t) p4;
+        fail_unless((p & pagemask) == 0);
+        p = (uintptr_t) p5;
+        fail_unless((p & pagemask) == 0);
+
+        /* Make sure we can read from the entire area.  */
+        memcpy(dummybuf, p1, pagesize);
+        memcpy(dummybuf, p2, pagesize);
+        memcpy(dummybuf, p3, pagesize);
+        memcpy(dummybuf, p4, pagesize);
+        memcpy(dummybuf, p5, pagesize);
+        munmap(p1, len);
+        munmap(p2, len);
+        munmap(p3, len);
+        munmap(p4, len);
+        munmap(p5, len);
+    }
+    fprintf(stdout, " passed\n");
 }
 
 void check_large_anonymous_unfixed_mmap(void)
@@ -135,52 +133,54 @@ void check_large_anonymous_unfixed_mmap(void)
 
 void check_aligned_anonymous_unfixed_colliding_mmaps(void)
 {
-	char *p1;
-	char *p2;
-	char *p3;
-	uintptr_t p;
-	int i;
-
-	fprintf(stdout, "%s", __func__);
-	for (i = 0; i < 0x2fff; i++)
-	{
-		int nlen;
-		p1 = mmap(NULL, pagesize, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		fail_unless (p1 != MAP_FAILED);
-		p = (uintptr_t) p1;
-		fail_unless ((p & pagemask) == 0);
-		memcpy (dummybuf, p1, pagesize);
-
-		p2 = mmap(NULL, pagesize, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		fail_unless (p2 != MAP_FAILED);
-		p = (uintptr_t) p2;
-		fail_unless ((p & pagemask) == 0);
-		memcpy (dummybuf, p2, pagesize);
-
-
-		munmap (p1, pagesize);
-		nlen = pagesize * 8;
-		p3 = mmap(NULL, nlen, PROT_READ, 
-			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		fail_unless (p3 != MAP_FAILED);
-
-		/* Check if the mmaped areas collide.  */
-		if (p3 < p2 
-		    && (p3 + nlen) > p2)
-			fail_unless (0);
-
-		memcpy (dummybuf, p3, pagesize);
-
-		/* Make sure we get pages aligned with the pagesize. The
-		   target expects this.  */
-		p = (uintptr_t) p3;
-		fail_unless ((p & pagemask) == 0);
-		munmap (p2, pagesize);
-		munmap (p3, nlen);
-	}
-	fprintf(stdout, " passed\n");
+    char *p1;
+    char *p2;
+    char *p3;
+    uintptr_t p;
+    int i;
+
+    fprintf(stdout, "%s", __func__);
+    for (i = 0; i < 2; i++) {
+        int nlen;
+        p1 = mmap(NULL, pagesize, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        fail_unless(p1 != MAP_FAILED);
+        p = (uintptr_t) p1;
+        fail_unless((p & pagemask) == 0);
+        memcpy(dummybuf, p1, pagesize);
+
+        p2 = mmap(NULL, pagesize, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        fail_unless(p2 != MAP_FAILED);
+        p = (uintptr_t) p2;
+        fail_unless((p & pagemask) == 0);
+        memcpy(dummybuf, p2, pagesize);
+
+
+        munmap(p1, pagesize);
+        nlen = pagesize * 8;
+        p3 = mmap(NULL, nlen, PROT_READ,
+                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        fail_unless(p3 != MAP_FAILED);
+
+        /* Check if the mmaped areas collide.  */
+        if (p3 < p2
+            && (p3 + nlen) > p2) {
+            fail_unless(0);
+        }
+
+        memcpy(dummybuf, p3, pagesize);
+
+        /*
+         * Make sure we get pages aligned with the pagesize. The
+         * target expects this.
+         */
+        p = (uintptr_t) p3;
+        fail_unless((p & pagemask) == 0);
+        munmap(p2, pagesize);
+        munmap(p3, nlen);
+    }
+    fprintf(stdout, " passed\n");
 }
 
 void check_aligned_anonymous_fixed_mmaps(void)
diff --git a/tests/tcg/hexagon/Makefile.target b/tests/tcg/hexagon/Makefile.target
index 0992787d50..050cd61c1a 100644
--- a/tests/tcg/hexagon/Makefile.target
+++ b/tests/tcg/hexagon/Makefile.target
@@ -18,15 +18,6 @@
 # Hexagon doesn't support gdb, so skip the EXTRA_RUNS
 EXTRA_RUNS =
 
-# Hexagon has 64K pages, so increase the timeout to keep
-# test-mmap from timing out
-ifeq ($(CONFIG_DEBUG_TCG),y)
-TIMEOUT=800
-else
-TIMEOUT=500
-endif
-
-
 CFLAGS += -Wno-incompatible-pointer-types -Wno-undefined-internal
 CFLAGS += -fno-unroll-loops
 
-- 
2.20.1