ruby.git/regexec.c, branch v3_4_9

Correct castings to use OnigDistance

2025-07-31T17:02:40+00:00

Add castings to prevent warnings

2025-07-31T17:02:40+00:00

Port a Oniguruma patch: Integer overflow in onig_search_gpos()

2025-07-31T17:02:40+00:00

https://github.com/kkos/oniguruma/commit/778a43dd56925ed58bbe26e3a7bb8202d72c3f3f

It differs from the Oniguruma patch in that it dosen't use `onigenc_get_prev_char_head()`
because this function's signature has been changed by Oniguruma and the change is not ported
in Onigmo for now. This patch respects the current Onigmo implementation.

Co-Authored-By: K.Kosako

Port a Oniguruma patch: Integer overflow in backward_search_range() and onig_search_gpos()

2025-07-31T17:02:40+00:00

https://github.com/kkos/oniguruma/commit/bfc36d3d8139b8be4d3df630d625c58687b0c7d4

Co-Authored-By: K.Kosako

Port a Oniguruma patch: Integer overflow in forward_search_range()

2025-07-31T17:02:40+00:00

https://github.com/kkos/oniguruma/commit/db64ef3189f54917a5008a02bdb000adc514a90a

Co-Authored-By: K.Kosako

Fix regex timeout double-free after stack_double

2024-11-12T07:33:21+00:00

As of 10574857ce167869524b97ee862b610928f6272f, it's possible to crash
on a double free due to `stk_alloc` AKA `msa->stack_p` being freed
twice, once at the end of match_at and a second time in `FREE_MATCH_ARG`
in the parent caller.

Fixes [Bug #20886]

[DOC] Fix typos

2024-10-31T03:44:50+00:00

Fix size modifier for `size_t`

2024-09-25T01:40:14+00:00

Fix memory leak in String#start_with? when regexp times out

2024-07-26T12:42:38+00:00

[Bug #20653]

This commit refactors how Onigmo handles timeout. Instead of raising a
timeout error, onig_search will return a ONIGERR_TIMEOUT which the
caller can free memory, and then raise a timeout error.

This fixes a memory leak in String#start_with when the regexp times out.
For example:

    regex = Regexp.new("^#{"(a*)" * 10_000}x$", timeout: 0.000001)
    str = "a" * 1000000 + "x"

    10.times do
      100.times do
        str.start_with?(regex)
      rescue
      end

      puts `ps -o rss= -p #{$$}`
    end

Before:

    33216
    51936
    71152
    81728
    97152
    103248
    120384
    133392
    133520
    133616

After:

    14912
    15376
    15824
    15824
    16128
    16128
    16144
    16144
    16160
    16160

Fix memory leak in Regexp capture group when timeout

2024-07-25T13:23:49+00:00

[Bug #20650]

The capture group allocates memory that is leaked when it times out.

For example:

    re = Regexp.new("^#{"(a*)" * 10_000}x$", timeout: 0.000001)
    str = "a" * 1000000 + "x"

    10.times do
      100.times do
        re =~ str
      rescue Regexp::TimeoutError
      end

      puts `ps -o rss= -p #{$$}`
    end

Before:

    34688
    56416
    78288
    100368
    120784
    140704
    161904
    183568
    204320
    224800

After:

    16288
    16288
    16880
    16896
    16912
    16928
    16944
    17184
    17184
    17200