| Commit message (Expand) | Author | Age | Files | Lines |
|---|
| * | eliminate OOB array hacks in malloc | Rich Felker | 2011-06-26 | 1 | -46/+45 |
| * | malloc: cast size down to int in bin_index functions•••even if size_t was 32-bit already, the fact that the value was
unsigned and that gcc is too stupid to figure out it would be positive
as a signed quantity (due to the immediately-prior arithmetic and
conditionals) results in gcc compiling the integer-to-float conversion
as zero extension to 64 bits followed by an "fildll" (64 bit)
instruction rather than a simple "fildl" (32 bit) instruction on x86.
reportedly fildll is very slow on certain p4-class machines; even if
not, the new code is slightly smaller.
| Rich Felker | 2011-06-12 | 1 | -2/+2 |
| * | use volatile pointers for intentional-crash code. | Rich Felker | 2011-06-06 | 1 | -2/+2 |
| * | namespace fixes for sys/mman.h | Rich Felker | 2011-04-20 | 1 | -0/+1 |
| * | fix rare but nasty under-allocation bug in malloc with large requests•••the bug appeared only with requests roughly 2*sizeof(size_t) to
4*sizeof(size_t) bytes smaller than a multiple of the page size, and
only for requests large enough to be serviced by mmap instead of the
normal heap. it was only ever observed on 64-bit machines but
presumably could also affect 32-bit (albeit with a smaller window of
opportunity).
| Rich Felker | 2011-04-04 | 1 | -1/+1 |
| * | avoid over-allocation of brk on first malloc•••if init_malloc returns positive (successful first init), malloc will
retry getting a chunk from the free bins rather than expanding the
heap again. also pass init_malloc a hint for the size of the initial
allocation.
| Rich Felker | 2011-04-01 | 1 | -4/+4 |
| * | very cheap double-free checks in malloc | Rich Felker | 2011-03-23 | 1 | -0/+4 |
| * | make malloc(0) return unique pointers rather than NULL•••this change is made with some reluctance, but i think it's for the
best. correct programs must handle either behavior, so there is little
advantage to having malloc(0) return NULL. and i managed to actually
make the malloc code slightly smaller with this change.
| Rich Felker | 2011-02-20 | 1 | -5/+9 |
| * | initial check-in, version 0.5.0 | Rich Felker | 2011-02-12 | 1 | -0/+515 |
