diff options
Diffstat (limited to 'libc/stdlib/malloc-standard/malloc.c')
| -rw-r--r-- | libc/stdlib/malloc-standard/malloc.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/libc/stdlib/malloc-standard/malloc.c b/libc/stdlib/malloc-standard/malloc.c index 8c06fdf1f..85b5081e3 100644 --- a/libc/stdlib/malloc-standard/malloc.c +++ b/libc/stdlib/malloc-standard/malloc.c @@ -349,7 +349,7 @@ static void* __malloc_alloc(size_t nb, mstate av) char* old_end; /* its end address */ long size; /* arg to first MORECORE or mmap call */ - char* brk; /* return value from MORECORE */ + char* fst_brk; /* return value from MORECORE */ long correction; /* arg to 2nd MORECORE call */ char* snd_brk; /* 2nd return val */ @@ -453,7 +453,7 @@ static void* __malloc_alloc(size_t nb, mstate av) old_size = chunksize(old_top); old_end = (char*)(chunk_at_offset(old_top, old_size)); - brk = snd_brk = (char*)(MORECORE_FAILURE); + fst_brk = snd_brk = (char*)(MORECORE_FAILURE); /* If not the first time through, we require old_size to * be at least MINSIZE and to have prev_inuse set. */ @@ -499,7 +499,7 @@ static void* __malloc_alloc(size_t nb, mstate av) */ if (size > 0) - brk = (char*)(MORECORE(size)); + fst_brk = (char*)(MORECORE(size)); /* If have mmap, try using it as a backup when MORECORE fails or @@ -510,7 +510,7 @@ static void* __malloc_alloc(size_t nb, mstate av) segregated mmap region. */ - if (brk == (char*)(MORECORE_FAILURE)) { + if (fst_brk == (char*)(MORECORE_FAILURE)) { /* Cannot merge with old top, so add its size back in */ if (contiguous(av)) @@ -523,12 +523,12 @@ static void* __malloc_alloc(size_t nb, mstate av) /* Don't try if size wraps around 0 */ if ((unsigned long)(size) > (unsigned long)(nb)) { - brk = (char*)(MMAP(0, size, PROT_READ|PROT_WRITE)); + fst_brk = (char*)(MMAP(0, size, PROT_READ|PROT_WRITE)); - if (brk != (char*)(MORECORE_FAILURE)) { + if (fst_brk != (char*)(MORECORE_FAILURE)) { /* We do not need, and cannot use, another sbrk call to find end */ - snd_brk = brk + size; + snd_brk = fst_brk + size; /* Record that we no longer have a contiguous sbrk region. After the first time mmap is used as backup, we do not @@ -540,14 +540,14 @@ static void* __malloc_alloc(size_t nb, mstate av) } } - if (brk != (char*)(MORECORE_FAILURE)) { + if (fst_brk != (char*)(MORECORE_FAILURE)) { av->sbrked_mem += size; /* If MORECORE extends previous space, we can likewise extend top size. */ - if (brk == old_end && snd_brk == (char*)(MORECORE_FAILURE)) { + if (fst_brk == old_end && snd_brk == (char*)(MORECORE_FAILURE)) { set_head(old_top, (size + old_size) | PREV_INUSE); } @@ -574,7 +574,7 @@ static void* __malloc_alloc(size_t nb, mstate av) front_misalign = 0; end_misalign = 0; correction = 0; - aligned_brk = brk; + aligned_brk = fst_brk; /* If MORECORE returns an address lower than we have seen before, @@ -584,7 +584,7 @@ static void* __malloc_alloc(size_t nb, mstate av) malloc or by other threads. We cannot guarantee to detect these in all cases, but cope with the ones we do detect. */ - if (contiguous(av) && old_size != 0 && brk < old_end) { + if (contiguous(av) && old_size != 0 && fst_brk < old_end) { set_noncontiguous(av); } @@ -595,11 +595,11 @@ static void* __malloc_alloc(size_t nb, mstate av) to foreign calls) but treat them as part of our space for stats reporting. */ if (old_size != 0) - av->sbrked_mem += brk - old_end; + av->sbrked_mem += fst_brk - old_end; /* Guarantee alignment of first new chunk made from this space */ - front_misalign = (size_t)chunk2mem(brk) & MALLOC_ALIGN_MASK; + front_misalign = (size_t)chunk2mem(fst_brk) & MALLOC_ALIGN_MASK; if (front_misalign > 0) { /* @@ -622,7 +622,7 @@ static void* __malloc_alloc(size_t nb, mstate av) correction += old_size; /* Extend the end address to hit a page boundary */ - end_misalign = (size_t)(brk + size + correction); + end_misalign = (size_t)(fst_brk + size + correction); correction += ((end_misalign + pagemask) & ~pagemask) - end_misalign; assert(correction >= 0); @@ -636,7 +636,7 @@ static void* __malloc_alloc(size_t nb, mstate av) correction = 0; snd_brk = (char*)(MORECORE(0)); } - else if (snd_brk < brk) { + else if (snd_brk < fst_brk) { /* If the second call gives noncontiguous space even though it says it won't, the only course of action is to ignore @@ -649,7 +649,7 @@ static void* __malloc_alloc(size_t nb, mstate av) there is no reliable way to detect a noncontiguity producing a forward gap for the second call. */ - snd_brk = brk + size; + snd_brk = fst_brk + size; correction = 0; set_noncontiguous(av); } @@ -659,12 +659,12 @@ static void* __malloc_alloc(size_t nb, mstate av) /* handle non-contiguous cases */ else { /* MORECORE/mmap must correctly align */ - assert(aligned_OK(chunk2mem(brk))); + assert(aligned_OK(chunk2mem(fst_brk))); /* Find out current end of memory */ if (snd_brk == (char*)(MORECORE_FAILURE)) { snd_brk = (char*)(MORECORE(0)); - av->sbrked_mem += snd_brk - brk - size; + av->sbrked_mem += snd_brk - fst_brk - size; } } |