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authorPatrik Nyblom <[email protected]>2012-02-13 20:13:37 +0100
committerPatrik Nyblom <[email protected]>2012-03-22 18:16:14 +0100
commitc15f94e7922040b63f3abf8680cd77d5548fecf3 (patch)
tree498dd289cf85393a70d4f34ff20c59338fd24066 /lib/dtrace/examples
parent0fd4e39abeea3fc87b78eec8495109f9245b5ac8 (diff)
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Add user tag spreading functionality to VM and use in file
User tags in a dynamic trace enabled VM are spread throughout the system in the same way as seq_trace tokens. This is used by the file module and various other modules to get hold of the tag from the user process without changing the protocol.
Diffstat (limited to 'lib/dtrace/examples')
-rw-r--r--lib/dtrace/examples/efile_drv.d3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/dtrace/examples/efile_drv.d b/lib/dtrace/examples/efile_drv.d
index c9c8080dba..085995ce58 100644
--- a/lib/dtrace/examples/efile_drv.d
+++ b/lib/dtrace/examples/efile_drv.d
@@ -71,7 +71,8 @@ erlang*:::efile_drv-entry
arg4 == NULL ? "" : copyinstr(arg4),
arg5 == NULL ? "" : copyinstr(arg5), arg6, arg7,
/* NOTE: port name in args[10] is experimental */
- copyinstr((user_addr_t) args[10]))
+ (args[10] == NULL) ?
+ "?" : copyinstr((user_addr_t) args[10]));
}
erlang*:::efile_drv-int*