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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2016-04-03 16:06:42 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2016-04-03 16:06:42 +0200 |
| commit | bc14f4d13d3cf1d43ae809d641e29174662cd1e4 (patch) | |
| tree | 40e35ab386de9c16bf5a5539a405fa5a1fdedc2b | |
| parent | 056e1f558cc8bc22f221b49bf4571aed59cdae09 (diff) | |
| download | busybox-bc14f4d13d3cf1d43ae809d641e29174662cd1e4.tar.gz | |
main(): add a TODO about finding a use for _end[] area
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | libbb/appletlib.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libbb/appletlib.c b/libbb/appletlib.c index 4b5b09f45..d798a2eac 100644 --- a/libbb/appletlib.c +++ b/libbb/appletlib.c @@ -902,6 +902,19 @@ int lbb_main(char **argv) int main(int argc UNUSED_PARAM, char **argv) #endif { +#if 0 + /* TODO: find a use for a block of memory between end of .bss + * and end of page. For example, I'm getting "_end:0x812e698 2408 bytes" + * - more than 2k of wasted memory (in this particular build) + * *per each running process*! + * (If your linker does not generate "_end" name, weak attribute + * makes &_end == NULL, end_len == 0 here.) + */ + extern char _end[] __attribute__((weak)); + unsigned end_len = (-(int)_end) & 0xfff; + printf("_end:%p %u bytes\n", &_end, end_len); +#endif + /* Tweak malloc for reduced memory consumption */ #ifdef M_TRIM_THRESHOLD /* M_TRIM_THRESHOLD is the maximum amount of freed top-most memory |