SUPPRESSION FILES

Ignore errors of given types and locations in file mysuppressions.supp.

valgrind --suppressions=myerrors.supp [--tool=... ]

Print a suppression for each error, for copying to a suppression file.

valgrind --gen-suppressions=yes [--tool=... ]

myerrors.supp
{
__gconv_transform_ascii_internal/__mbrtowc/mbtowc
    # Name identifying this entry.
Memcheck:Value4
    # Error given by Memcheck tool. Uninitialized value of width 4 bytes.
fun:__gconv_transform_ascii_internal
fun:__mbr*toc
fun:mbtowc
    # Call stack matches these three functions in order. Note the wildcard.
}
# Example entry in a suppression file. It applies if all the conditions are met.

Valgrind also ignores known errors in system libraries on many systems. On others, you may need a lot of suppression wildcards for library errors.

SUPPRESSION EXAMPLE

To ignore leaks related to the readline and add_history functions, create a file called readline.supp with the following content:

valgrind --suppressions=readline.supp --leak-check=full --show-leak-kinds=all ./minishell

{
    leak readline
    Memcheck:Leak
    ...
    fun:readline
}
{
    leak add_history
    Memcheck:Leak
    ...
    fun:add_history
}