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Diffstat (limited to 'Documentation/coccinelle.txt')
| -rw-r--r-- | Documentation/coccinelle.txt | 50 |
1 files changed, 39 insertions, 11 deletions
diff --git a/Documentation/coccinelle.txt b/Documentation/coccinelle.txt index cd2b0283706..4a276ea7001 100644 --- a/Documentation/coccinelle.txt +++ b/Documentation/coccinelle.txt @@ -24,6 +24,9 @@ of many distributions, e.g. : You can get the latest version released from the Coccinelle homepage at http://coccinelle.lip6.fr/ +Information and tips about Coccinelle are also provided on the wiki +pages at http://cocci.ekstranet.diku.dk/wiki/doku.php + Once you have it, run the following command: ./configure @@ -41,20 +44,22 @@ A Coccinelle-specific target is defined in the top level Makefile. This target is named 'coccicheck' and calls the 'coccicheck' front-end in the 'scripts' directory. -Four modes are defined: report, patch, context, and org. The mode to +Four modes are defined: patch, report, context, and org. The mode to use is specified by setting the MODE variable with 'MODE=<mode>'. +'patch' proposes a fix, when possible. + 'report' generates a list in the following format: file:line:column-column: message -'patch' proposes a fix, when possible. - 'context' highlights lines of interest and their context in a diff-like style.Lines of interest are indicated with '-'. 'org' generates a report in the Org mode format of Emacs. -Note that not all semantic patches implement all modes. +Note that not all semantic patches implement all modes. For easy use +of Coccinelle, the default mode is "chain" which tries the previous +modes in the order above until one succeeds. To make a report for every semantic patch, run the following command: @@ -68,9 +73,9 @@ To produce patches, run: The coccicheck target applies every semantic patch available in the -subdirectories of 'scripts/coccinelle' to the entire Linux kernel. +sub-directories of 'scripts/coccinelle' to the entire Linux kernel. -For each semantic patch, a changelog message is proposed. It gives a +For each semantic patch, a commit message is proposed. It gives a description of the problem being checked by the semantic patch, and includes a reference to Coccinelle. @@ -93,12 +98,35 @@ or make coccicheck COCCI=<my_SP.cocci> MODE=report + Using Coccinelle on (modified) files +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +To apply Coccinelle on a file basis, instead of a directory basis, the +following command may be used: + + make C=1 CHECK="scripts/coccicheck" + +To check only newly edited code, use the value 2 for the C flag, i.e. + + make C=2 CHECK="scripts/coccicheck" + +This runs every semantic patch in scripts/coccinelle by default. The +COCCI variable may additionally be used to only apply a single +semantic patch as shown in the previous section. + +The "chain" mode is the default. You can select another one with the +MODE variable explained above. + +In this mode, there is no information about semantic patches +displayed, and no commit message proposed. + + Proposing new semantic patches ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ New semantic patches can be proposed and submitted by kernel developers. For sake of clarity, they should be organized in the -subdirectories of 'scripts/coccinelle/'. +sub-directories of 'scripts/coccinelle/'. Detailed description of the 'report' mode @@ -111,7 +139,7 @@ Example: Running - make coccicheck MODE=report COCCI=scripts/coccinelle/err_cast.cocci + make coccicheck MODE=report COCCI=scripts/coccinelle/api/err_cast.cocci will execute the following part of the SmPL script. @@ -149,7 +177,7 @@ identified. Example: Running - make coccicheck MODE=patch COCCI=scripts/coccinelle/err_cast.cocci + make coccicheck MODE=patch COCCI=scripts/coccinelle/api/err_cast.cocci will execute the following part of the SmPL script. @@ -193,7 +221,7 @@ NOTE: The diff-like output generated is NOT an applicable patch. The Example: Running - make coccicheck MODE=context COCCI=scripts/coccinelle/err_cast.cocci + make coccicheck MODE=context COCCI=scripts/coccinelle/api/err_cast.cocci will execute the following part of the SmPL script. @@ -228,7 +256,7 @@ diff -u -p /home/user/linux/crypto/ctr.c /tmp/nothing Example: Running - make coccicheck MODE=org COCCI=scripts/coccinelle/err_cast.cocci + make coccicheck MODE=org COCCI=scripts/coccinelle/api/err_cast.cocci will execute the following part of the SmPL script. |