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| author | Sergei Golubchik <serg@mariadb.org> | 2016-03-21 13:02:53 +0100 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2016-03-21 13:02:53 +0100 |
| commit | 3b0c7ac1f9d64afc933ce0354037c709366b7dff (patch) | |
| tree | 39cefed54f79f93f82e9c33a4e094270103bf137 /mysys/lf_alloc-pin.c | |
| parent | e7cf898d6dc3dcac41f58db4761df3a6d1dffc03 (diff) | |
| parent | 22ebf3cb456e0d8db295e7cc93f08e3d3ecfea47 (diff) | |
| download | mariadb-git-3b0c7ac1f9d64afc933ce0354037c709366b7dff.tar.gz | |
Merge branch '10.0' into 10.1
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 f8a15829fb1..b349ef88ed1 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); @@ -345,7 +351,8 @@ 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); |