| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <fb1d5c03315893fab7526e68e2e1b3af9b6a775e.1587840668.git.syednwaris@gmail.com>
Date: Sun, 26 Apr 2020 00:33:06 +0530
From: Syed Nayyar Waris <syednwaris@...il.com>
To: akpm@...ux-foundation.org
Cc: andriy.shevchenko@...ux.intel.com, vilhelm.gray@...il.com,
linus.walleij@...aro.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/6] lib/test_bitmap.c: Add for_each_set_clump test cases
The introduction of the generic for_each_set_clump macro need test
cases to verify the implementation. This patch adds test cases for
scenarios in which clump sizes are 8 bits, 24 bits, 30 bits and 6 bits.
The cases contain situations where clump is getting split at the word
boundary and also when zeroes are present in the start and middle of
bitmap.
Cc: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Syed Nayyar Waris <syednwaris@...il.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
---
Changes in v2:
- Unify different tests for 'for_each_set_clump'. Pass test data as
function parameters.
- Remove unnecessary bitmap_zero calls.
lib/test_bitmap.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 121 insertions(+)
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 6b13150..13fe9a2 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -155,6 +155,38 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
return true;
}
+static bool __init __check_eq_clump(const char *srcfile, unsigned int line,
+ const unsigned int offset,
+ const unsigned int size,
+ const unsigned long *const clump_exp,
+ const unsigned long *const clump,
+ const unsigned long clump_size)
+{
+ unsigned long exp;
+
+ if (offset >= size) {
+ pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
+ srcfile, line, size, offset);
+ return false;
+ }
+
+ exp = clump_exp[offset / clump_size];
+ if (!exp) {
+ pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
+ srcfile, line, offset);
+ return false;
+ }
+
+ if (*clump != exp) {
+ pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
+ srcfile, line, exp, *clump);
+ return false;
+ }
+
+ return true;
+}
+
+
#define __expect_eq(suffix, ...) \
({ \
int result = 0; \
@@ -172,6 +204,7 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
#define expect_eq_clump8(...) __expect_eq(clump8, ##__VA_ARGS__)
+#define expect_eq_clump(...) __expect_eq(clump, ##__VA_ARGS__)
static void __init test_zero_clear(void)
{
@@ -588,6 +621,46 @@ static const unsigned char clump_exp[] __initconst = {
0x05, /* non-adjacent 2 bits set */
};
+static const unsigned long clump_exp1[] __initconst = {
+ 0x01, /* 1 bit set */
+ 0x02, /* non-edge 1 bit set */
+ 0x00, /* zero bits set */
+ 0x38, /* 3 bits set across 4-bit boundary */
+ 0x38, /* Repeated clump */
+ 0x0F, /* 4 bits set */
+ 0xFF, /* all bits set */
+ 0x05, /* non-adjacent 2 bits set */
+};
+
+static const unsigned long clump_exp2[] __initconst = {
+ 0xfedcba, /* 24 bits */
+ 0xabcdef,
+ 0xaabbbb, /* Clump split between 2 words */
+ 0x000000, /* zeroes in between */
+ 0x0000aa,
+ 0x000000,
+ 0x0000ff,
+ 0xaaaaaa,
+ 0x000000,
+ 0x0000ff,
+};
+
+static const unsigned long clump_exp3[] __initconst = {
+ 0x00000000, /* starting with 0s*/
+ 0x00000000, /* All 0s */
+ 0x00000000,
+ 0x00000000,
+ 0x3f00000f, /* Non zero set */
+ 0x2aa80003,
+ 0x00000aaa,
+ 0x00003fc0,
+};
+
+static const unsigned long clump_exp4[] __initconst = {
+ 0x00,
+ 0x2b,
+};
+
static void __init test_for_each_set_clump8(void)
{
#define CLUMP_EXP_NUMBITS 64
@@ -610,6 +683,53 @@ static void __init test_for_each_set_clump8(void)
expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
}
+static void __init execute_for_each_set_clump(unsigned long *bits,
+ unsigned long size,
+ const unsigned long *clump_exp,
+ unsigned long clump_size)
+{
+ unsigned long start, clump;
+
+ for_each_set_clump(start, clump, bits, size, clump_size)
+ expect_eq_clump(start, size, clump_exp, &clump, clump_size);
+}
+
+static void __init test_for_each_set_clump(void)
+{
+ /* common bitmap of max size for different tests */
+ DECLARE_BITMAP(bits, 256);
+
+ /* set bitmap for test case 1 with clump size as 8 bits */
+ bitmap_set_value(bits, 0x38000201, 0, 32);
+ bitmap_set_value(bits, 0x05ff0f38, 32, 32);
+
+ execute_for_each_set_clump(bits, 64, clump_exp1, 8);
+
+ /* set bitmap for test case 2 with clump size as 24 bits */
+ bitmap_set_value(bits, 0xeffedcba, 0, 32);
+ bitmap_set_value(bits, 0xbbbbabcd, 32, 32);
+ bitmap_set_value(bits, 0x000000aa, 64, 32);
+ bitmap_set_value(bits, 0x000000aa, 96, 32);
+ bitmap_set_value(bits, 0x00ff0000, 128, 32);
+ bitmap_set_value(bits, 0xaaaaaa00, 160, 32);
+ bitmap_set_value(bits, 0xff000000, 192, 32);
+ bitmap_set_value(bits, 0x00aa0000, 224, 32);
+
+ execute_for_each_set_clump(bits, 240, clump_exp2, 24);
+
+ /* set bitmap for test case 3 with clump size as 30 bits */
+ bitmap_set_value(bits, 0x00000000, 0, 32);
+ bitmap_set_value(bits, 0x00000000, 32, 32);
+ bitmap_set_value(bits, 0x00000000, 64, 32);
+ bitmap_set_value(bits, 0x0f000000, 96, 32);
+
+ execute_for_each_set_clump(bits, 240, clump_exp3, 30);
+
+ /* set bitmap for test case 4 with clump size as 6 bits */
+ bitmap_set_value(bits, 0x00000ac0, 0, 32);
+ execute_for_each_set_clump(bits, 18, clump_exp4, 6);
+}
+
static void __init selftest(void)
{
test_zero_clear();
@@ -623,6 +743,7 @@ static void __init selftest(void)
test_bitmap_parselist_user();
test_mem_optimisations();
test_for_each_set_clump8();
+ test_for_each_set_clump();
}
KSTM_MODULE_LOADERS(test_bitmap);
--
2.7.4
Powered by blists - more mailing lists