diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sys/ptrace.2 | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/lib/libc/sys/ptrace.2 b/lib/libc/sys/ptrace.2 index ab51ee3..8265fb6 100644 --- a/lib/libc/sys/ptrace.2 +++ b/lib/libc/sys/ptrace.2 @@ -2,7 +2,7 @@ .\" $NetBSD: ptrace.2,v 1.2 1995/02/27 12:35:37 cgd Exp $ .\" .\" This file is in the public domain. -.Dd February 8, 2010 +.Dd February 11, 2010 .Dt PTRACE 2 .Os .Sh NAME @@ -343,23 +343,30 @@ argument specifies a pointer to a which is defined as follows: .Bd -literal struct ptrace_vm_entry { - void *pve_cookie; - u_long pve_start; - u_long pve_end; - u_long pve_offset; - u_int pve_prot; - u_int pve_pathlen; - char *pve_path; + int pve_entry; + int pve_timestamp; + u_long pve_start; + u_long pve_end; + u_long pve_offset; + u_int pve_prot; + u_int pve_pathlen; + long pve_fileid; + uint32_t pve_fsid; + char *pve_path; }; .Ed .Pp The first entry is returned by setting -.Va pve_cookie -to -.Dv NULL . +.Va pve_entry +to zero. Subsequent entries are returned by leaving -.Va pve_cookie +.Va pve_entry unmodified from the value returned by previous requests. +The +.Va pve_timestamp +field can be used to detect changes to the VM map while iterating over the +entries. +The tracing process can then take appropriate action, such as restarting. By setting .Va pve_pathlen to a non-zero value on entry, the pathname of the backing object is returned @@ -434,7 +441,8 @@ was attempted on a process with no valid register set. .It .Dv PT_VM_ENTRY was given an invalid value for -.Fa pve_cookie . +.Fa pve_entry . +This can also be caused by changes to the VM map of the process. .El .It Bq Er EBUSY .Bl -bullet -compact |
