Attachment 147002 Details for Bug 225531 – test case

test case

pt-ia64-getregs-test.c (text/plain), 3.48 KB, created by Roland McGrath on 2007-01-31 05:40:54 UTC

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Creator: Roland McGrath

Created: 2007-01-31 05:40:54 UTC

Size: 3.48 KB

patch

obsolete

>/**
>  * A process attach it's child, if success , try to getregs use PTRACE_GETREGS,
>  * in EL5 beta, this failed with errno=EIO
>  */
>
>#include <stdio.h>
>#include <sys/ptrace.h>
>#include <sys/types.h>
>#include <sys/wait.h>
>#include <unistd.h>
>#include <errno.h>
>#include <time.h>
>#include <signal.h>
>#include <assert.h>
>#include <string.h>
>
>#define DUMMY_VALUE 12345
>static void fill_dummp (unsigned long *addr) {
>	int i, size;
>
>	size = sizeof(struct pt_all_user_regs)/sizeof(unsigned long);
>	for (i=0; i<size; i++) {
>		*addr = DUMMY_VALUE;
>		addr++;
>	}
>}
>
>static int start=-1;
>static int len=0;
>static void print_register_name(int index) {
>	int min;
>
>	if (len == 0) {
>		start = index;
>		len =1;
>	} else if (index == (start+len)) 
>		len++;
>	else while (len) {
>		switch (start) {
>			case 0 ... 4:
>				if (start == 0)
>					printf(" nat \n");
>				else if (start == 1)
>					printf(" cr_iip \n");
>				else if (start == 2)
>					printf(" cfm \n");
>				else if (start == 3)
>					printf(" cr_ipsr \n");
>				else if (start == 4)
>					printf(" pr \n");
>				start++;
>				len--;
>				break;
>			case 5 ... 36:
>				min = 37 - start;
>				if (min > len) min = len;
>				printf(" gr%d --- gr%d \n", start-5, start+min-1-5);
>				start += min;
>				len -= min;
>				break;
>			case 37 ... 44:
>				min = 45 - start;
>				if (min > len) min = len;
>				printf(" br%d --- br%d \n", start-37, start+min-1-37);
>				start += min;
>				len -= min;
>				break;
>			case 45 ... 172:
>				min = 173 - start;
>				if (min > len) min = len;
>				printf(" ar%d --- ar%d \n", start-45, start+min-1-45);
>				start += min;
>				len -= min;
>				break;
>			/* this is padding space in pt_all_user_regs */
>			case 173:
>				start++;
>				len--;
>				break;
>			case 174 ... 429:
>				printf(" fr%d --- fr%d \n", (start - 174)/2, (start - 174 + len -1)/2);
>				start += len;
>				len = 0;
>				break;
>			default:
>				 break;
>		}
>	 }
>}
>
>static void print_unchanged_register(unsigned long *addr) {
>	int i, size;
>
>	size = sizeof(struct pt_all_user_regs)/sizeof(unsigned long);
>	printf("Unmodified register by PTRACE_GETREGS request \n");
>	for (i=0; i<size; i++) {
>		if (*addr == DUMMY_VALUE) {
>			print_register_name(i);
>		}
>		addr++;
>	}
>	/* To flush last register area */
>	print_register_name(0x40000);
>	printf("\n");
>}
>
>int main(int argc, char ** argv, char ** envp)
>{
>    int pid;
>    long  ret;
>    int i;
>    
>    if ((pid = fork()) == -1) {
>	perror ("fork");
>	return -1;
>    } else if (pid == 0) {
>	//child process, an infinite loop
>	while(1){
>		sleep(1);
>	}
>	return 0; 
>    } else {
>	//parent process
>        int tmp_pid, status;
>        int err = 0;
>	char note=0;
>	struct pt_all_user_regs ptregs;
>	unsigned long *p;
>	/*
>	* attach child process
>	*/
>	ret = ptrace (PTRACE_ATTACH, pid, 0, 0);
>	if (ret != 0) {
>                perror ("PTRACE_ATTACH");
>                return 0;
>    	}
>      	tmp_pid = wait4(pid, &status, WUNTRACED, NULL);
>        if (tmp_pid < 0) {
>      	    perror ("wait4 failed");
>  	    return -1;
>	}
>
>	/*
>	* use ptrace to get debugee's regs value
>	*/
>	fill_dummp((unsigned long*)&ptregs);
>	ret = ptrace( PTRACE_GETREGS, pid, 0, (unsigned long)&ptregs); 
>	if( ret!=0){
>		printf("Error code %d\n", ret);
>		perror("ptrace_getregs");
>		return -1;
>	}
>	print_unchanged_register((unsigned long*)&ptregs);
>	/*
>	* detach from child prcoess
>	*/
>	ret = ptrace (PTRACE_KILL, pid, 0, 0);
>	if (ret != 0) {
>	    perror ("ptrace_kill");
>	    return -1;
>	}
>      	tmp_pid = wait4(pid, &status, WUNTRACED, NULL);
>        if (tmp_pid < 0) {
>      	    perror ("wait4 failed");
>  	    return -1;
>	}
>    }
>    return 0;
>}
>

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Attachments on bug 225531: 147002 | 154319