musl - musl - an implementation of the standard library for Linux-based systems

regex: increase the stack tre uses for tnfa creation

10k elements stack is increased to 1000k, otherwise tnfa creation fails for reasonable sized patterns: a single literal char can add 7 elements to this stack, so regcomp of an 1500 char long pattern (with only litral chars) fails with REG_ESPACE. (the new limit allows about < 150k chars, this arbitrary limit allows most command line regex usage.) ideally there would be no upper bound: regcomp dynamically reallocates this buffer, every reallocation checks for allocation failure and at the end this stack is freed so there is no reason for special bound. however that may have unwanted effect on regcomp and regexec runtime so this is a conservative change.

Diffstat (limited to 'src/regex/regcomp.c')

1 files changed, 1 insertions, 1 deletions