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authorRich Felker <dalias@aerifal.cx>2015-06-14 01:59:02 +0000
committerRich Felker <dalias@aerifal.cx>2015-06-14 01:59:02 +0000
commite3bc22f1eff87b8f029a6ab31f1a269d69e4b053 (patch)
treed0fc5ca6b5a1a5740f739a37ff5d8c7446fbfd9a /src/ipc/shmat.c
parent4ef9b828c1f39553a69e0635ac91f0fcadd6e8c6 (diff)
downloadmusl-e3bc22f1eff87b8f029a6ab31f1a269d69e4b053.tar.gz
refactor malloc's expand_heap to share with __simple_malloc
this extends the brk/stack collision protection added to full malloc in commit 276904c2f6bde3a31a24ebfa201482601d18b4f9 to also protect the __simple_malloc function used in static-linked programs that don't reference the free function. it also extends support for using mmap when brk fails, which full malloc got in commit 5446303328adf4b4e36d9fba21848e6feb55fab4, to __simple_malloc. since __simple_malloc may expand the heap by arbitrarily large increments, the stack collision detection is enhanced to detect interval overlap rather than just proximity of a single address to the stack. code size is increased a bit, but this is partly offset by the sharing of code between the two malloc implementations, which due to linking semantics, both get linked in a program that needs the full malloc with realloc/free support.
Diffstat (limited to 'src/ipc/shmat.c')
0 files changed, 0 insertions, 0 deletions