mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-09 05:10:23 +00:00
918c3a7b7e
Valgrind's dependency on the dynamic linker for getting started, and instead takes things into its own hands. This checkin doesn't add much in the way of new functionality, but it is the basis for all future work on Valgrind. It allows us much more flexibility in implementation, and well as increasing the reliability of Valgrind by protecting it more from its clients. This patch requires some changes to tools to update them to the changes in the tool API, but they are straightforward. See the posting "Heads up: Full Virtualization" on valgrind-developers for a more complete description of this change and its effects on you. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2118
78 lines
1.3 KiB
C
78 lines
1.3 KiB
C
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/* Test Heimdall's ability to spot writes to code which has been
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translated, and discard the out-of-date translations.
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CORRECT output is
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in p 0
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in q 1
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in p 2
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in q 3
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in p 4
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in q 5
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in p 6
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in q 7
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in p 8
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in q 9
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WRONG output (if you fail to spot code-writes to code[0 .. 4]) is
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in p 0
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in p 1
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in p 2
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in p 3
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in p 4
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in p 5
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in p 6
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in p 7
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in p 8
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in p 9
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*/
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#include <stdio.h>
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#include "valgrind.h"
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typedef unsigned int Addr;
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typedef unsigned char UChar;
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void q ( int n )
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{
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printf("in q %d\n", n);
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}
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void p ( int n )
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{
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printf("in p %d\n", n);
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}
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UChar code[10];
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/* Make `code' be JMP-32 dest */
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void set_dest ( Addr dest )
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{
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unsigned int delta;
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delta = dest - ((Addr)(&code[0]));
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delta -= 5;
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code[0] = 0xE9; /* JMP d32 */
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code[1] = (delta & 0xFF);
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code[2] = ((delta >> 8) & 0xFF);
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code[3] = ((delta >> 16) & 0xFF);
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code[4] = ((delta >> 24) & 0xFF);
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/* XXX this should be automatic */
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VALGRIND_DISCARD_TRANSLATIONS(code, sizeof(code));
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}
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int main ( void )
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{
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int i;
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for (i = 0; i < 10; i += 2) {
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set_dest ( (Addr)&p );
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( (void (*)(int)) (&code[0]) ) (i);
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set_dest ( (Addr)&q );
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( (void (*)(int)) (&code[0]) ) (i+1);
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}
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return 0;
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}
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