$OpenBSD: patch-base_process_util_openbsd_cc,v 1.10 2012/12/18 21:38:12 sthen Exp $
--- base/process_util_openbsd.cc.orig	Tue Nov 13 19:02:10 2012
+++ base/process_util_openbsd.cc	Fri Dec  7 06:24:10 2012
@@ -13,6 +13,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/param.h>
+#include <sys/proc.h>
 #include <sys/sysctl.h>
 #include <sys/user.h>
 #include <time.h>
@@ -30,39 +31,59 @@
 namespace base {
 
 ProcessId GetParentProcessId(ProcessHandle process) {
-  struct kinfo_proc info;
+  struct kinfo_proc *info;
   size_t length;
+  pid_t ppid;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
                 sizeof(struct kinfo_proc), 0 };
 
   if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
     return -1;
 
+  info = (struct kinfo_proc *)malloc(length);
+
   mib[5] = (length / sizeof(struct kinfo_proc));
 
-  if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
-    return -1;
+  if (sysctl(mib, arraysize(mib), info, &length, NULL, 0) < 0) {
+    ppid = -1;
+    goto out;
+  }
 
-  return info.p_ppid;
+  ppid = info->p_ppid;
+
+out:
+  free(info);
+  return ppid;
 }
 
 FilePath GetProcessExecutablePath(ProcessHandle process) {
-  struct kinfo_proc kp;
-  size_t len;
+  struct kinfo_proc *info;
+  size_t length;
+  char *path = NULL;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
                 sizeof(struct kinfo_proc), 0 };
 
-  if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) == -1)
+  if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) == -1)
     return FilePath();
-  mib[5] = (len / sizeof(struct kinfo_proc));
-  if (sysctl(mib, arraysize(mib), &kp, &len, NULL, 0) < 0)
-    return FilePath();
-  if ((kp.p_flag & P_SYSTEM) != 0)
-    return FilePath();
-  if (strcmp(kp.p_comm, "chrome") == 0)
-    return FilePath(kp.p_comm);
 
-  return FilePath();
+  info = (struct kinfo_proc *)malloc(length);
+
+  mib[5] = (length / sizeof(struct kinfo_proc));
+
+  if (sysctl(mib, arraysize(mib), info, &length, NULL, 0) < 0)
+    goto out;
+
+  if ((info->p_flag & P_SYSTEM) != 0)
+    goto out;
+
+  if (strcmp(info->p_comm, "chrome") == 0) {
+    path = info->p_comm;
+    goto out;
+  }
+
+out:
+  free(info);
+  return FilePath(path);
 }
 
 ProcessIterator::ProcessIterator(const ProcessFilter* filter)
@@ -194,20 +215,28 @@ ProcessMetrics* ProcessMetrics::CreateProcessMetrics(P
 }
 
 size_t ProcessMetrics::GetPagefileUsage() const {
-  struct kinfo_proc info;
-  size_t length;
+  struct kinfo_proc *info;
+  size_t length, pfu;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_,
                 sizeof(struct kinfo_proc), 0 };
 
   if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
     return -1;
 
+  info = (struct kinfo_proc *)malloc(length);
+
   mib[5] = (length / sizeof(struct kinfo_proc));
 
-  if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
-    return -1;
+  if (sysctl(mib, arraysize(mib), info, &length, NULL, 0) < 0) {
+    pfu = -1;
+    goto out;
+  }
 
-  return (info.p_vm_tsize + info.p_vm_dsize + info.p_vm_ssize);
+  pfu = (info->p_vm_tsize + info->p_vm_dsize + info->p_vm_ssize);
+
+out:
+  free(info);
+  return pfu;
 }
 
 size_t ProcessMetrics::GetPeakPagefileUsage() const {
@@ -216,20 +245,28 @@ size_t ProcessMetrics::GetPeakPagefileUsage() const {
 }
 
 size_t ProcessMetrics::GetWorkingSetSize() const {
-  struct kinfo_proc info;
-  size_t length;
+  struct kinfo_proc *info;
+  size_t length, wss;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_,
                 sizeof(struct kinfo_proc), 0 };
 
   if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
     return -1;
 
+  info = (struct kinfo_proc *)malloc(length);
+
   mib[5] = (length / sizeof(struct kinfo_proc));
 
-  if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
-    return -1;
+  if (sysctl(mib, arraysize(mib), info, &length, NULL, 0) < 0) {
+    wss = -1;
+    goto out;
+  }
 
-  return info.p_vm_rssize * getpagesize();
+  wss = (info->p_vm_rssize * getpagesize());
+
+out:
+  free(info);
+  return wss;
 }
 
 size_t ProcessMetrics::GetPeakWorkingSetSize() const {
@@ -270,20 +307,27 @@ bool ProcessMetrics::GetIOCounters(IoCounters* io_coun
 }
 
 static int GetProcessCPU(pid_t pid) {
-  struct kinfo_proc info;
+  struct kinfo_proc *info;
   size_t length;
+  int pctcpu = 0;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid,
                 sizeof(struct kinfo_proc), 0 };
 
   if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
     return -1;
 
+  info = (struct kinfo_proc *)malloc(length);
+
   mib[5] = (length / sizeof(struct kinfo_proc));
 
-  if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
-    return 0;
+  if (sysctl(mib, arraysize(mib), info, &length, NULL, 0) < 0)
+    goto out;
 
-  return info.p_pctcpu;
+  pctcpu = info->p_pctcpu;
+
+out:
+  free(info);
+  return pctcpu;
 }
 
 double ProcessMetrics::GetCPUUsage() {