Correctly handle prctl(VKI_PR_SET_PTRACER, ..) so as to avoid false

positives (eg when running Wine).


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14946 a5019735-40e9-0310-863c-91ae7b9d1cf9

Author: sewardj

coregrind/m_syswrap/syswrap-linux.c

@@ -1015,6 +1015,9 @@ PRE(sys_prctl)
    case VKI_PR_SET_ENDIAN:
       PRE_REG_READ2(int, "prctl", int, option, int, value);
       break;
+   case VKI_PR_SET_PTRACER:
+      PRE_REG_READ2(int, "prctl", int, option, int, ptracer_process_ID);
+      break;
    default:
       PRE_REG_READ5(long, "prctl",
                     int, option, unsigned long, arg2, unsigned long, arg3,

include/vki/vki-linux.h

@@ -2506,6 +2506,7 @@ struct vki_vt_consize {
 # define VKI_PR_ENDIAN_BIG		0
 # define VKI_PR_ENDIAN_LITTLE	1	/* True little endian mode */
 # define VKI_PR_ENDIAN_PPC_LITTLE	2	/* "PowerPC" pseudo little endian */
+#define VKI_PR_SET_PTRACER 0x59616d61
 
 //----------------------------------------------------------------------
 // From linux-2.6.19/include/linux/usbdevice_fs.h