[Lldb-commits] [lldb] r312430 - FreeBSD: attach to pid from different cwd

Ed Maste via lldb-commits lldb-commits at lists.llvm.org
Sat Sep 2 18:41:31 PDT 2017

Author: emaste
Date: Sat Sep  2 18:41:31 2017
New Revision: 312430

URL: http://llvm.org/viewvc/llvm-project?rev=312430&view=rev
FreeBSD: attach to pid from different cwd

attach by pid worked when running from the directory from which the
target was launched, but failed from a different directory. Use the
kern.proc.pathname sysctl to locate the target, falling back to the
original case of the target's argv[0] if that fails. Based on a patch
from Vignesh Balu.

Differential Revision:	https://reviews.llvm.org/D32271


Modified: lldb/trunk/source/Host/freebsd/Host.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/freebsd/Host.cpp?rev=312430&r1=312429&r2=312430&view=diff
--- lldb/trunk/source/Host/freebsd/Host.cpp (original)
+++ lldb/trunk/source/Host/freebsd/Host.cpp Sat Sep  2 18:41:31 2017
@@ -73,7 +73,14 @@ GetFreeBSDProcessArgs(const ProcessInsta
   if (!cstr)
     return false;
-  process_info.GetExecutableFile().SetFile(cstr, false);
+  // Get pathname for pid. If that fails fall back to argv[0].
+  char pathname[MAXPATHLEN];
+  size_t pathname_len = sizeof(pathname);
+  if (::sysctl(mib, 4, pathname, &pathname_len, NULL, 0) == 0)
+    process_info.GetExecutableFile().SetFile(pathname, false);
+  else
+    process_info.GetExecutableFile().SetFile(cstr, false);
   if (!(match_info_ptr == NULL ||

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