Attachment 155493 Details for Bug 241408 – refined test case

refined test case

ptrace-sysemu.c (text/x-csrc), 1.63 KB, created by Roland McGrath on 2007-05-26 01:27:52 UTC

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Filename:

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Creator: Roland McGrath

Created: 2007-05-26 01:27:52 UTC

Size: 1.63 KB

patch

obsolete

>#include <stdlib.h>
>#include <stdio.h>
>#include <asm/unistd.h>
>#include <sys/mman.h>
>#include <sys/ptrace.h>
>#include <asm/ptrace.h>
>#include <linux/ptrace.h>
>#include <sys/user.h>
>#include <sys/wait.h>
>
>#define PTRACE_SYSEMU		  31
>
>static inline long stub_syscall0(long syscall)
>{
>	long ret;
>
>	__asm__ volatile ("int $0x80;nop;hlt" : "=a" (ret) : "0" (syscall));
>
>	return ret;
>}
>
>static void child(void)
>{
>	if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){
>		perror("traceme");
>		exit(1);
>	}
>
>	kill(getpid(), SIGUSR1);
>	stub_syscall0(__NR_getpid);
>}
>
>int main(void)
>{
>	int pid, n, status;
>	struct user_regs_struct regs;
>
>	pid = fork();
>	if(pid < 0)
>		perror("fork");
>	else if(pid == 0){
>		child();
>	}
>	else {
>		int first = 1;
>		while(1){
>			n = waitpid(pid, &status, WUNTRACED);
>			if(n < 0){
>				perror("waitpid");
>				exit(1);
>			}
>
>			if (first) {
>				first = 0;
>				n = ptrace(PTRACE_SETOPTIONS, pid,
>					   0, PTRACE_O_TRACESYSGOOD);
>				if(n < 0){
>					perror("PTRACE_SETOPTIONS");
>					exit(1);
>				}
>			}
>
>			n = ptrace(PTRACE_GETREGS, pid, 0, &regs);
>			if(n < 0){
>				perror("PTRACE_GETREGS");
>				exit(1);
>			}
>#ifdef __x86_64__
># define eip rip
># define eax rax
># define orig_eax orig_rax
>#endif
>
>			if (!(WIFSTOPPED(status)
>			      && WSTOPSIG(status) == SIGUSR1))
>			printf("Status %#x ip %lx ax %ld orig ax %ld\n",
>			       status,
>			       regs.eip, regs.eax, regs.orig_eax);
>
>			if (WIFSTOPPED(status)
>			    && WSTOPSIG(status) != SIGUSR1
>			    && WSTOPSIG(status) != (SIGTRAP | 0x80))
>				status = WSTOPSIG(status);
>			else
>				status = 0;
>
>			if(ptrace(PTRACE_SYSEMU, pid, 0, status)){
>				perror("PTRACE_SYSEMU");
>				exit(1);
>			}
>		}
>	}
>
>	return 0;
>}

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Attachments on bug 241408: 155480 | 155493