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make -DC work with yama ptrace protection

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This commit is contained in:
Oswald Buddenhagen 2019-12-03 13:00:19 +01:00
parent bee4fc54e7
commit 121448ceb9
1 changed files with 20 additions and 0 deletions
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20
src/main.c
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@ -30,6 +30,9 @@
#include <signal.h> #include <signal.h>
#include <time.h> #include <time.h>
#include <sys/wait.h> #include <sys/wait.h>
#ifdef __linux__
# include <sys/prctl.h>
#endif
int DFlags; int DFlags;
int JLimit; int JLimit;
@ -144,17 +147,34 @@ crashHandler( int n )
dup2( 0, 1 ); dup2( 0, 1 );
dup2( 0, 2 ); dup2( 0, 2 );
error( "*** " EXE " caught signal %d. Starting debugger ...\n", n ); error( "*** " EXE " caught signal %d. Starting debugger ...\n", n );
#ifdef PR_SET_PTRACER
int pip[2];
if (pipe( pip ) < 0) {
perror( "pipe()" );
exit( 3 );
}
#endif
switch ((dpid = fork())) { switch ((dpid = fork())) {
case -1: case -1:
perror( "fork()" ); perror( "fork()" );
break; break;
case 0: case 0:
#ifdef PR_SET_PTRACER
close( pip[1] );
read( pip[0], pbuf, 1 );
close( pip[0] );
#endif
sprintf( pbuf, "%d", Pid ); sprintf( pbuf, "%d", Pid );
sprintf( pabuf, "/proc/%d/exe", Pid ); sprintf( pabuf, "/proc/%d/exe", Pid );
execlp( "gdb", "gdb", pabuf, pbuf, (char *)0 ); execlp( "gdb", "gdb", pabuf, pbuf, (char *)0 );
perror( "execlp()" ); perror( "execlp()" );
_exit( 1 ); _exit( 1 );
default: default:
#ifdef PR_SET_PTRACER
prctl( PR_SET_PTRACER, (ulong)dpid );
close( pip[1] );
close( pip[0] );
#endif
waitpid( dpid, 0, 0 ); waitpid( dpid, 0, 0 );
break; break;
} }