mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
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c0b36ade5b
does not work, as conversion will stop at the first invalid character. So... need to loop over them. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12822
237 lines
7.2 KiB
C
237 lines
7.2 KiB
C
#include <stdint.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include "opcodes.h"
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/* The abstracted result of an CU42 insn */
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typedef struct {
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uint64_t addr1; // target
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uint64_t len1;
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uint64_t addr2; // source
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uint64_t len2;
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uint32_t cc;
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} cu42_t;
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/* Define various input buffers. */
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/* U+0000 to U+d7ff: Result is 2 bytes for each uint32_t
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U+dc00 to U+ffff: Result is 2 bytes for each uint32_t */
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uint32_t pattern2[] = {
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0x0000, 0xd7ff, /* corner cases */
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0xdc00, 0xffff, /* corner cases */
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0xabba, 0xf00d, 0xd00f, 0x1234 /* misc */
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};
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/* U+00010000 to U+0010ffff: Result is 4 bytes for each uint32_t */
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uint32_t pattern4[] = {
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0x00010000, 0x0010ffff, /* corner cases */
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0x00010123, 0x00023456, 0x000789ab, 0x00100000 /* misc */
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};
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/* Invalid UTF-32 character */
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uint32_t invalid[] = {
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0x0000d800, 0x0000dbff, /* corner cases */
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0x00110000, 0xffffffff, /* corner cases */
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0x0000daad, 0x0000d901, 0x0000d8ff, /* misc */
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0x00110011, 0x01000000, 0x10000000, 0xdeadbeef /* misc */
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};
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/* Mixed bytes */
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uint32_t mixed[] = {
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0x00000078 /* 2 bytes */,
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0x0000d000 /* 2 bytes */,
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0x00033333 /* 4 bytes */,
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0x00040404 /* 4 bytes */,
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0x0000abcd /* 2 bytes */,
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};
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/* This is the buffer for the converted bytes. */
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uint16_t buff[1000]; /* Large so we con'don't have to worry about it */
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void write_and_check(uint32_t *, unsigned, unsigned);
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static cu42_t
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do_cu42(uint16_t *dst, uint64_t dst_len, uint32_t *src, uint64_t src_len)
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{
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int cc = 42;
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cu42_t regs;
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/* build up the register pairs */
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register uint32_t *source asm("4") = src;
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register uint64_t source_len asm("5") = src_len;
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register uint16_t *dest asm("2") = dst;
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register uint64_t dest_len asm("3") = dst_len;
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asm volatile(
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CU42(2,4)
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"ipm %2\n\t"
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"srl %2,28\n\t"
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: "+d"(dest), "+d"(source), "=d"(cc),
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"+d"(source_len), "+d"(dest_len)
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:
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: "memory", "cc");
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/* Capture register contents at end of cu42 */
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regs.addr1 = (uint64_t)dest;
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regs.len1 = dest_len;
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regs.addr2 = (uint64_t)source;
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regs.len2 = source_len;
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regs.cc = cc;
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return regs;
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}
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void
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run_test(uint16_t *dst, uint64_t dst_len, uint32_t *src, uint64_t src_len)
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{
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int i;
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cu42_t result;
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result = do_cu42(dst, dst_len, src, src_len);
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// Write out the converted values, if any
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printf("UTF16: ");
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if (dst_len - result.len1 == 0)
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printf(" <none>");
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else
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assert((dst_len - result.len1) % 2 == 0);
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for (i = 0; i < (dst_len - result.len1) / 2; ++i) {
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printf(" %04x", dst[i]);
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}
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printf("\n");
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printf(" cc = %d\n", result.cc);
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if (dst != NULL)
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printf(" dst address difference: %"PRId64, result.addr1 - (uint64_t)dst);
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printf(" dst len: %"PRId64"\n", result.len1);
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if (src != NULL)
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printf(" src address difference: %"PRId64, result.addr2 - (uint64_t)src);
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printf(" src len: %"PRId64"\n", result.len2);
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}
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int main()
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{
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int i;
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/* Length == 0, no memory should be read or written */
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printf("\n------------- test1 ----------------\n");
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run_test(NULL, 0, NULL, 0);
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/* Test exhaustion of source length (source bytes are valid) */
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printf("\n------------- test2.1 ----------------\n");
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/* No character will be written to BUFF, i.e. loop in jitted code
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is not iterated */
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run_test(buff, sizeof buff, NULL, 0);
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run_test(buff, sizeof buff, NULL, 1);
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run_test(buff, sizeof buff, NULL, 2);
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run_test(buff, sizeof buff, NULL, 3);
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run_test(buff, sizeof buff, pattern2, 0);
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run_test(buff, sizeof buff, pattern2, 1);
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run_test(buff, sizeof buff, pattern2, 2);
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run_test(buff, sizeof buff, pattern2, 3);
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printf("\n------------- test2.2 ----------------\n");
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/* At least one character will be written to BUFF, i.e. loop in jitted
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code is iterated */
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run_test(buff, sizeof buff, pattern2, 4); /* 1 utf32 -> 1 utf16 */
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run_test(buff, sizeof buff, pattern2, 10); /* 2 utf32 -> 2 utf16 */
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run_test(buff, sizeof buff, pattern4, 5); /* 1 utf32 -> 2 utf16 */
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run_test(buff, sizeof buff, pattern4, 11); /* 2 utf32 -> 4 utf16 */
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run_test(buff, sizeof buff, pattern4, 18); /* 4 utf32 -> 8 utf16 */
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/* Test exhaustion of destination length (source bytes are valid) */
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printf("\n------------- test3.1 ----------------\n");
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/* No character will be written to BUFF, i.e. loop in jitted code
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is not iterated */
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/* Want to write at least 1 UTF-16 */
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run_test(NULL, 0, pattern2, sizeof pattern2);
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/* Want to write at least 1 UTF-16 */
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run_test(NULL, 0, pattern2, sizeof pattern2);
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run_test(NULL, 1, pattern2, sizeof pattern2);
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/* Want to write at least 2 UTF-16 */
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run_test(NULL, 0, pattern4, sizeof pattern4);
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run_test(NULL, 1, pattern4, sizeof pattern4);
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run_test(NULL, 2, pattern4, sizeof pattern4);
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run_test(NULL, 3, pattern4, sizeof pattern4);
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/* When both operands are exhausted, cc=0 takes precedence.
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(test1 tests this for len == 0) */
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printf("\n------------- test4 ----------------\n");
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run_test(buff, 4, pattern2, 8);
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/* Input contains invalid characters */
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// As conversion stops upon encountering an invalid character, we
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// need to test each invalid character separately, to make sure it
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// is recognized as invalid.
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printf("\n------------- test5 ----------------\n");
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for (i = 0; i < sizeof invalid / 4; ++i) {
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run_test(buff, sizeof buff, invalid + i, 4);
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}
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run_test(buff, 0, invalid, sizeof invalid); // cc = 2
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run_test(buff, 100, invalid, sizeof invalid);
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/* Convert all pattern buffers */
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printf("\n------------- test6 ----------------\n");
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run_test(buff, sizeof buff, pattern2, sizeof pattern2);
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run_test(buff, sizeof buff, pattern4, sizeof pattern4);
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run_test(buff, sizeof buff, mixed, sizeof mixed);
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/* Make sure we only write the exact number of bytes (and not more) */
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/* Write 2 bytes */
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printf("\n------------- test7.1 ----------------\n");
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write_and_check(pattern2 + 3, 4, 2);
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/* Write 4 bytes */
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printf("\n------------- test7.2 ----------------\n");
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write_and_check(pattern4 + 5, 4, 4);
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return 0;
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}
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void
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write_and_check_aux(uint32_t *input, unsigned num_input_bytes,
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unsigned num_expected_output_bytes,
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unsigned fill_byte)
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{
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int num_errors, i;
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/* Fill output buffer with FILL_BYTE */
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memset(buff, fill_byte, sizeof buff);
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/* Execute cu42 */
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run_test(buff, sizeof buff, input, num_input_bytes);
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/* Make sure the rest of the buffer is unmodified. */
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num_errors = 0;
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for (i = num_expected_output_bytes; i < sizeof buff; ++i)
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if (((unsigned char *)buff)[i] != fill_byte) ++num_errors;
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if (num_errors)
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fprintf(stderr, "*** wrote more than %d bytes\n",
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num_expected_output_bytes);
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}
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void
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write_and_check(uint32_t *input, unsigned num_input_bytes,
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unsigned num_expected_output_bytes)
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{
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write_and_check_aux(input, num_input_bytes, num_expected_output_bytes, 0x0);
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/* Run again with different fill pattern to make sure we did not write
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an extra 0x0 byte */
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write_and_check_aux(input, num_input_bytes, num_expected_output_bytes, 0xFF);
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}
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