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| author | Ulrich Drepper <drepper@redhat.com> | 2001-07-23 07:07:11 +0000 |
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| committer | Ulrich Drepper <drepper@redhat.com> | 2001-07-23 07:07:11 +0000 |
| commit | a9d61e2988f3af7117a7502980cb1b9c51f849f3 (patch) | |
| tree | d00624afa25f9970fd8e0f2345727e01367b7b69 /posix/regex.c | |
| parent | bbdf82856440bb670f5db03d6e79103b0c7b59a5 (diff) | |
| download | glibc-a9d61e2988f3af7117a7502980cb1b9c51f849f3.tar.gz glibc-a9d61e2988f3af7117a7502980cb1b9c51f849f3.tar.xz glibc-a9d61e2988f3af7117a7502980cb1b9c51f849f3.zip | |
Update.
2001-07-23 Ulrich Drepper <drepper@redhat.com> * posix/regex.c: Revamp memory allocation for WCHAR functions to not use too much stack.
Diffstat (limited to 'posix/regex.c')
| -rw-r--r-- | posix/regex.c | 91 |
1 files changed, 73 insertions, 18 deletions
diff --git a/posix/regex.c b/posix/regex.c index 463f926221..759651df14 100644 --- a/posix/regex.c +++ b/posix/regex.c @@ -5072,16 +5072,35 @@ weak_alias (__re_search_2, re_search_2) #endif #ifdef WCHAR -# define FREE_WCS_BUFFERS() \ - do { \ - FREE_VAR (string1); \ - FREE_VAR (string2); \ - FREE_VAR (mbs_offset1); \ - FREE_VAR (mbs_offset2); \ +# define MAX_ALLOCA_SIZE 2000 + +# define FREE_WCS_BUFFERS() \ + do { \ + if (size1 > MAX_ALLOCA_SIZE) \ + { \ + free (wcs_string1); \ + free (mbs_offset1); \ + } \ + else \ + { \ + FREE_VAR (wcs_string1); \ + FREE_VAR (mbs_offset1); \ + } \ + if (size2 > MAX_ALLOCA_SIZE) \ + { \ + free (wcs_string2); \ + free (mbs_offset2); \ + } \ + else \ + { \ + FREE_VAR (wcs_string2); \ + FREE_VAR (mbs_offset2); \ + } \ } while (0) #endif + static int PREFIX(re_search_2) (bufp, string1, size1, string2, size2, startpos, range, regs, stop) @@ -5156,36 +5175,72 @@ PREFIX(re_search_2) (bufp, string1, size1, string2, size2, startpos, range, fill them with converted string. */ if (size1 != 0) { - wcs_string1 = REGEX_TALLOC (size1 + 1, CHAR_T); - mbs_offset1 = REGEX_TALLOC (size1 + 1, int); - is_binary = REGEX_TALLOC (size1 + 1, char); + if (size1 > MAX_ALLOCA_SIZE) + { + wcs_string1 = TALLOC (size1 + 1, CHAR_T); + mbs_offset1 = TALLOC (size1 + 1, int); + is_binary = TALLOC (size1 + 1, char); + } + else + { + wcs_string1 = REGEX_TALLOC (size1 + 1, CHAR_T); + mbs_offset1 = REGEX_TALLOC (size1 + 1, int); + is_binary = REGEX_TALLOC (size1 + 1, char); + } if (!wcs_string1 || !mbs_offset1 || !is_binary) { - FREE_VAR (wcs_string1); - FREE_VAR (mbs_offset1); - FREE_VAR (is_binary); + if (size1 > MAX_ALLOCA_SIZE) + { + free (wcs_string1); + free (mbs_offset1); + free (is_binary); + } + else + { + FREE_VAR (wcs_string1); + FREE_VAR (mbs_offset1); + FREE_VAR (is_binary); + } return -2; } wcs_size1 = convert_mbs_to_wcs(wcs_string1, string1, size1, mbs_offset1, is_binary); wcs_string1[wcs_size1] = L'\0'; /* for a sentinel */ - FREE_VAR (is_binary); + if (size1 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); } if (size2 != 0) { - wcs_string2 = REGEX_TALLOC (size2 + 1, CHAR_T); - mbs_offset2 = REGEX_TALLOC (size2 + 1, int); - is_binary = REGEX_TALLOC (size2 + 1, char); + if (size2 > MAX_ALLOCA_SIZE) + { + wcs_string2 = TALLOC (size2 + 1, CHAR_T); + mbs_offset2 = TALLOC (size2 + 1, int); + is_binary = TALLOC (size2 + 1, char); + } + else + { + wcs_string2 = REGEX_TALLOC (size2 + 1, CHAR_T); + mbs_offset2 = REGEX_TALLOC (size2 + 1, int); + is_binary = REGEX_TALLOC (size2 + 1, char); + } if (!wcs_string2 || !mbs_offset2 || !is_binary) { FREE_WCS_BUFFERS (); - FREE_VAR (is_binary); + if (size2 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); return -2; } wcs_size2 = convert_mbs_to_wcs(wcs_string2, string2, size2, mbs_offset2, is_binary); wcs_string2[wcs_size2] = L'\0'; /* for a sentinel */ - FREE_VAR (is_binary); + if (size2 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); } #endif /* WCHAR */ |