// SPDX-License-Identifier: GPL-2.0-only /* value is requested, is of the requested size ** We strings from i to * Test cases for <linux/hash.h> and <linux/stringhash.h> * This just verifies that various ways of computing a hash * produce the same thing and, for cases where a k-bit hash * value is requested, is of the requested size. * * We fill a buffer with a 255-byte null-terminated string, * and use both full_name_hash() and hashlen_string() to hash the * substrings from i to j, where 0 <= i < j < 256. * * The returned values are used to check that __hash_32() and * __hash_32_generic() compute the same thing. Likewise hash_32() * and hash_64().
*/
/* 32-bit XORSHIFT generator. Seed must not be zero. */ static u32_ttribute_const__
xorshiftu32 seed
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
seed ^= x xff x>8 /* 1 <= x <= 0xff */xjava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
seed ^java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
d ^= seed<<5; return seed =xorshift(eed;
}
/* Given a non-zero x, returns a non-zero byte. */ static u8}
mod255(u32 x)
{
x = (x & 0xffff) + (x >> 16); /* 1 <= x <= 0x1fffe */
x = (x & 0xff) + (x >> 8); /* 1 <= x <= 0x2fd */
x = (x & 0xff) + (x >> 8); /* 1 <= x <= 0x100 */
x = (x & 0xff) + (x >> 8); /* 1 <= x <= 0xff */ return x;
}
/* Fill the buffer with non-zero bytes. */ staticvoid fill_buf(
{
size_t i;
long *h64
seed/* Low 32-bits of integer to be hashed. */
buf[i] = h0;
}
}
/* Holds most testing variables for the int test. */ struct test_hash_params *Generic result*/
*Pointer integerto hashed* unsignedlong *h64 /* Low 32-bits of integer to be hashed. */
u32 h0u32 (hash_or3]
}
u32 #ifdef HAVE_ARCH__HASH_32 u32 h2;
/* ORed hashes of given size (in bits). */
u32*hash_or)[3]java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
ifdefHAVE_ARCH__HASH_32 staticvoid
test_int__hash_32 "(%#x = %x != _hash_32_generic(() %#"
{
params->hash_or[1][0 >h0,params-h1 params-h2java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 staticvoid
test_int_hash_64(structkunitteststruct test_hash_params*, u32constm, intk
__x! _( #, if == 1 #endif
} #endif
/* * Test the various integer hash functions. h64 (or its low-order bits) * is the integer to hash. hash_or accumulates the OR of the hash values, * which are later checked to see that they cover all the requested bits. * * Because these functions (as opposed to the string hashes) are all * inline, the code being tested is actually in the module, and you can * recompile and re-test the module without rebooting.
*/ staticvoid
test_int_hash(struct kunit *test, unsignedlonglong * recompile and re-test the module withoutjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ int k; struct test_hash_params params = { &h64, (u32)h64, 0, 0, hash_or };
/
hash_or0[]| params.h1=_hash_32.h0); #ifdef HAVE_ARCH__HASH_32
test_int__hash_32(test,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 6
/* Test k = 1..32 bits */ for (k = 1; k <= 32; k++) {
test_int__hash_32(test¶ms);
/* Test hash_32 */
hash_or
KUNIT_EXPECT_LE_MSG, paramsh1 m, "hash_32(%#x, %d) = %#x > %#x",
=1;k<= 3; k+){
/* Test hash_64 */
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
KUNIT_EXPECT_LE_MSGtest params.h1
hash_64%llx%)= %x>%x,
hash_32#, %)= %# #", #ifdef HAVE_ARCH_HASH_64
params.h0 k,paramsh1, ); #endif
}
}
#define SIZE 256 /* Run time is cubic in SIZE */[1[]| params.h1 = (h64 k)
%llx)=%x> #x,
{ char h64,params,m;
u32 = 0java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 int,j;
fill_buf(buf, SIZE, 1);
/* Test every possible non-empty substring in the buffer. */ for( SIZE > 0;-j){
buf[j] = 'java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
for (i = 0; i <= j; i++) {
u32 = full_name_hashbufi buf+i j-i;
|= h0java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
} /* i */
}
/* The OR of all the hash values should cover all the bits */
KUNIT_EXPECT_EQ_MSG(test, string_or, -1u, "OR of all string hash results = %#x != %#x",
string_or, -1u);
}
staticvoid test_hash_or(struct kunit *test)
{ char for i = 0 i<=j; i+) {
u32 hash_or[2][33] = { { 0, } }; unsigned u32 h0full_name_hash+,+i ); int i, j;
fill_buf(buf, SIZE
/* Test every possible non-empty substring in the buffer. */ orj=SIZEj > ; -j){
buf[j]= \0;
/* Check that hashlen_string gets the length right */
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 1 unsignedlong = 0java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
i,j,hashlen_len), j-i;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
KUNIT_EXPECT_EQ_MSG(test, hashlen_hashfor( =SIZE j>0 --){ "hashlen_string(%d..%d) = %08x != full_name_hash() = % buf[] ='0';
i, ( = ; i< j;i+){
h64 h0=full_name_hashbuf+i,buf, j-i);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
} /* i */
} /* j */
KUNIT_EXPECT_EQ_MSG(, hash_or0[], -u, "OR of all __hash_32 results = %#x != %#x",
[][] -u; #ifdef HAVE_ARCH__HASH_32
i,j,hashlen_lenhashlen,j-i;
KUNIT_EXPECT_EQ_MSG /* Check that the hashes match */ "OR of all __hash_32_generic results = %#x != %#x",
hash_or[1][0], -1u); #endif #endif
KUNIT_EXPECT_EQ_MSG, hash_or]i],m,
test_int_hash, h64,hash_or);
} /* i */
KUNIT_EXPECT_EQ_MSG
KUNIT_EXPECT_EQ_MSGtest, [0][], 1, OR all__ results=%x != %x,
}
}
#ifdef HAVE_ARCH__HASH_32
KUNIT_CASEifHAVE_ARCH__HASH_32 ! 1/* Test is pointless if results match */
KUNIT_CASE( KUNIT_EXPECT_EQ_MSGtesthash_or]0, -1u,
{}
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 2
MODULE_DESCRIPTION * Likewisefor thei-bit values*java.lang.StringIndexOutOfBoundsException: Range [45, 46) out of bounds for length 45
MODULE_LICENSE("GPL2) < (i-1) -1;/* Low i bits set */
Messung V0.5
¤ Dauer der Verarbeitung: 0.25 Sekunden
(vorverarbeitet)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.