Enable profiling / leak detection in FreeBSD

Harald Weppner · Harald Weppner · commit bf543df20ccd · 2014-03-17T23:53:00.000-07:00
* Assumes procfs is mounted at /proc, cf. <http://www.freebsd.org/doc/en/articles/linux-users/procfs.html>
diff --git a/bin/pprof b/bin/pprof
@@ -4197,8 +4197,12 @@ sub FindLibrary {
 # For libc libraries, the copy in /usr/lib/debug contains debugging symbols
 sub DebuggingLibrary {
   my $file = shift;
-  if ($file =~ m|^/| && -f "/usr/lib/debug$file") {
-    return "/usr/lib/debug$file";
+  if ($file =~ m|^/|) {
+      if (-f "/usr/lib/debug$file") {
+        return "/usr/lib/debug$file";
+      } elsif (-f "/usr/lib/debug$file.debug") {
+        return "/usr/lib/debug$file.debug";
+      }
   }
   return undef;
 }
@@ -4360,6 +4364,19 @@ sub ParseLibraries {
       $finish = HexExtend($2);
       $offset = $zero_offset;
       $lib = $3;
+    }
+    # FreeBSD 10.0 virtual memory map /proc/curproc/map as defined in
+    # function procfs_doprocmap (sys/fs/procfs/procfs_map.c)
+    #
+    # Example:
+    # 0x800600000 0x80061a000 26 0 0xfffff800035a0000 r-x 75 33 0x1004 COW NC vnode /libexec/ld-elf.s
+    # o.1 NCH -1
+    elsif ($l =~ /^(0x$h)\s(0x$h)\s\d+\s\d+\s0x$h\sr-x\s\d+\s\d+\s0x\d+\s(COW|NCO)\s(NC|NNC)\svnode\s(\S+\.so(\.\d+)*)/) {
+      $start = HexExtend($1);
+      $finish = HexExtend($2);
+      $offset = $zero_offset;
+      $lib = FindLibrary($5);
+
     } else {
       next;
     }
@@ -4382,6 +4399,7 @@ sub ParseLibraries {
       }
     }
 
+    if($main::opt_debug) { printf STDERR "$start:$finish ($offset) $lib\n"; }
     push(@{$result}, [$lib, $start, $finish, $offset]);
   }
 
diff --git a/src/prof.c b/src/prof.c
@@ -11,6 +11,12 @@
 #include <unwind.h>
 #endif
 
+#ifdef __FreeBSD__
+#define PROCESS_VMEM_MAP "/proc/curproc/map"
+#else
+#define PROCESS_VMEM_MAP "/proc/%d/maps"
+#endif
+
 /******************************************************************************/
 /* Data. */
 
@@ -936,7 +942,7 @@ prof_dump_maps(bool propagate_err)
 
 	cassert(config_prof);
 
-	malloc_snprintf(filename, sizeof(filename), "/proc/%d/maps",
+	malloc_snprintf(filename, sizeof(filename), PROCESS_VMEM_MAP,
 	    (int)getpid());
 	mfd = open(filename, O_RDONLY);
 	if (mfd != -1) {
