DWARF-less probing

sample-bt-leaks

diff --git a/samples/sample-bt-leaks.sxx b/samples/sample-bt-leaks.sxx
index dba62e7..8dc15a2 100755
--- a/samples/sample-bt-leaks.sxx
+++ b/samples/sample-bt-leaks.sxx
@@ -49,7 +49,7 @@ probe process("$^libc_path").function("malloc").return,
                 }
             }

-            ptr = $return
+            ptr = returnval()
             if (ptr) {
                 // here we use a hack specific to glibc's implementation
                 // to get the size of the memory block because we
@@ -73,10 +73,9 @@ probe process("$^libc_path").function("malloc").return,

 probe process("$^libc_path").function("free")
 {
-    if (pid() == target() && $mem) {
-        //printf("free: %p\n", $mem)
-        ptr = $mem
-
+    ptr = pointer_arg(1)
+    if (pid() == target() && ptr) {
+        //printf("free: %p\n", mem)
         bt = ptr2bt[ptr]
         delete ptr2bt[ptr]