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| author | Sergei Golubchik <serg@mariadb.org> | 2016-03-21 11:54:45 +0100 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2016-03-21 11:54:45 +0100 |
| commit | 98ea8062075f027561488bf0f6c6e3aaf217249e (patch) | |
| tree | 79d66dc1069035013222bea9cb5ada925291b522 /mysys/lf_alloc-pin.c | |
| parent | b9e571882b3801f53d30bb77155743af39c1b719 (diff) | |
| parent | 11b77e9b18a8d97063b4c4a96e40bf9c75bd0e8b (diff) | |
| download | mariadb-git-98ea8062075f027561488bf0f6c6e3aaf217249e.tar.gz | |
Merge branch '5.5' into 10.0
Diffstat (limited to 'mysys/lf_alloc-pin.c')
| -rw-r--r-- | mysys/lf_alloc-pin.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mysys/lf_alloc-pin.c b/mysys/lf_alloc-pin.c index b599b455ff5..282433ea48d 100644 --- a/mysys/lf_alloc-pin.c +++ b/mysys/lf_alloc-pin.c @@ -103,6 +103,12 @@ #include <my_sys.h> #include <lf.h> +/* + when using alloca() leave at least that many bytes of the stack - + for functions we might be calling from within this stack frame +*/ +#define ALLOCA_SAFETY_MARGIN 8192 + #define LF_PINBOX_MAX_PINS 65536 static void _lf_pinbox_real_free(LF_PINS *pins); @@ -349,7 +355,8 @@ static void _lf_pinbox_real_free(LF_PINS *pins) { int alloca_size= sizeof(void *)*LF_PINBOX_PINS*npins; /* create a sorted list of pinned addresses, to speed up searches */ - if (available_stack_size(&pinbox, *pins->stack_ends_here) > alloca_size) + if (available_stack_size(&pinbox, *pins->stack_ends_here) > + alloca_size + ALLOCA_SAFETY_MARGIN) { struct st_harvester hv; addr= (void **) alloca(alloca_size); |