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Diffstat (limited to 'CONTRIBUTING.md')
| -rw-r--r-- | CONTRIBUTING.md | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 01e94401..77f180e4 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -123,7 +123,7 @@ and ask! You can configure and build tcpdump with the instrumentation of functions: ``` $ ./configure --enable-instrument-functions - $ make -s + $ make -s clean all ``` This generates instrumentation calls for entry and exit to functions. @@ -137,19 +137,22 @@ and ask! In some cases, with Clang 11, the file number is unknown (printed '??') or the line number is unknown (printed '?'). In this case, use GCC. - To print nothing, like with no instrumentation: - ``` - $ make instrument_off - ``` + If the environment variable INSTRUMENT is + - unset or set to an empty string, print nothing, like with no + instrumentation + - set to "all" or "a", print all the functions names + - set to "global" or "g", print only the global functions names - To configure the printing of only the global functions names: + This allows to run: ``` - $ make instrument_global + $ INSTRUMENT=a ./tcpdump ... + $ INSTRUMENT=g ./tcpdump ... + $ INSTRUMENT= ./tcpdump ... ``` - - To go back to print all the functions names: + or ``` - $ make instrument_all + $ export INSTRUMENT=global + $ ./tcpdump ... ``` The library libbfd is used, therefore the binutils-dev package is required. |