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path: root/libc/stdlib/malloc-simple/alloc.c
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2020-12-23stdlib: fix potential UB and integer overflow with huge allocations using ↵Yann Sionneau
malloc-simple allocator Two things are fixed by this commit: 1/ It is wrong to allocate an object of size > PTRDIFF_MAX. It is explained in this thread: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63303 2/ There was a possible integer overflow in both malloc() and memalign() implementations of stdlib/malloc-simple. The malloc() integer overflow issue is fixed by the side effect of fixing the PTRDIFF_MAX issue. The memalign() one is fixed by adding a comparison. Signed-off-by: Yann Sionneau <yann@sionneau.net>
2016-12-20remove __MALLOC_GLIBC_COMPAT__ optionWaldemar Brodkorb
This option is enabled for a long time and I see no useful case where we should be incompatible to glibc here.
2015-01-22libc: Avoid redundant setting of ENOMEMBernhard Reutner-Fischer
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2013-04-03stdlib: avoid relocationBernhard Reutner-Fischer
valloc uses memalign Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2013-02-05mman: rename MAP_UNINITIALIZE to MAP_UNINITIALIZEDBernhard Reutner-Fischer
The name was changed to include a trailing 'D' when it went into the kernel. Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2012-06-15malloc-simple: make _aligned_blocks static and __libc_free_aligned hiddenPeter S. Mazinger
move __libc_free_aligned prototype up to a common place. Signed-off-by: Peter S. Mazinger <ps.m@gmx.net> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2010-07-27malloc-simple: Make calloc() return zeroed memorySteven J. Magnani
The 0.9.31 release included a change to malloc-simple to request uninitialized memory from noMMU kernels. Unfortunately, the corresponding calloc() code assumed that memory returned by malloc() was already zeroed, which leads to all kinds of nastiness. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2009-11-23nommu: use MAP_UNINITIALIZE for mallocsMike Frysinger
Now that the kernel supports MAP_UNINITIALIZE, have the malloc places use it to get real uninitialized memory on no-mmu systems. This avoids a lot of normally useless overhead involved in zeroing out all of the memory (sometimes multiple times). Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-18trim Experimentally off and uncommented hiddenBernhard Reutner-Fischer
sed -i -e '/Experimentally off - /d' $(grep -rl "Experimentally off - " *) sed -i -e '/^\/\*[[:space:]]*libc_hidden_proto(/d' $(grep -rl "libc_hidden_proto" *) should be a nop Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2008-11-20Last portion of libc_hidden_proto removal.Denis Vlasenko
Appears to build fine (several .configs tried)
2008-11-20next portion of libc_hidden_proto removalDenis Vlasenko
2008-10-27- pull in prototype for memalign()Bernhard Reutner-Fischer
2008-10-11Fix bug 4994 hangs on read(). I have tested the patch extensibly on ARM/LT.old.Khem Raj
Thank you Chase Douglas for reporting it and for the patch.
2008-06-01add missing includes of unistd.h for smallint usageDenis Vlasenko
remove a few duplicate includes of unistd.h
2008-05-19Moving libc_hidden_proto's into #ifdef UCLIBC_INTERNAL blockDenis Vlasenko
in string.h and strings.h. This caught unguarded string ops in libc/inet/ethers.c __ether_line_w() function. I will wait for fallout reports for a week or so, then continue converting more libc_hidden_proto's.
2007-04-11POSIX says you can use realloc() to shrink buffers ... make sure we dont ↵Mike Frysinger
trigger a buffer overflow in that case
2007-04-02POSIX requires that errno be set whenever 0 is returned by malloc()Mike Frysinger
2006-12-07Major cleanup of internal mutex locking. Be more consistant in how we doEric Andersen
things, and avoid potential deadlocks caused when a thread holding a uClibc internal lock get canceled and terminates without releasing the lock. This change also provides a single place, bits/uClibc_mutex.h, for thread libraries to modify to change all instances of internal locking.
2006-02-18tweak the idea between having a MMU and actually using itMike Frysinger
2006-02-13Update some copyrightsPeter S. Mazinger
2006-01-22Enable _GNU_SOURCE build wide, trying to get consistent interfaces, else IMA ↵Peter S. Mazinger
is a useless attempt
2006-01-14hidden_def/hidden_proto: convert all users (I hope) termios split, add some ↵Peter S. Mazinger
missing headers, other jump relocs removed
2005-12-08mmap/mremap/socket/rewind gonePeter S. Mazinger
2005-12-06macro out the thread funcs in libc if threading is disabledMike Frysinger
2005-12-04More hiding, 300 leftPeter S. Mazinger
2005-12-01Hide mostly used functionsPeter S. Mazinger
2005-07-07update syntaxMike Frysinger
2005-07-07Yoshinori Sato writes:Mike Frysinger
Dont forgive that length of munmap is "0" in current nommu. This purpose cannot free memory area really. It is a patch to work out a solution.
2004-07-15Use MAP_PRIVATE whenever __ARCH_HAS_MMU__ is set.Eric Andersen
Only use MAP_SHARED when mmu-less.
2004-01-16s/UCLIBC_HAS_MMU/ARCH_HAS_MMU/gEric Andersen
2004-01-14Include missing errno.h header (as noted by Alan Hourihane).Eric Andersen
Fix uninitialized pthread mutex used to lock the list of aligned memory blocks.
2003-12-30Rework malloc. The new default implementation is based on dlmalloc from DougEric Andersen
Lea. It is about 2x faster than the old malloc-930716, and behave itself much better -- it will properly release memory back to the system, and it uses a combination of brk() for small allocations and mmap() for larger allocations. -Erik
2003-12-30Update and restore malloc-simple. Slow as molasses, but triviallyEric Andersen
simple and releases memory immediately when asked to do so. -Erik
2002-07-18Miles Bader implemented a new mmap based malloc which is muchEric Andersen
smarter than the old "malloc-simple", and actually works, unlike the old "malloc". So kill the old "malloc-simple" and the old "malloc" and replace them with Miles' new malloc implementation. Update Config files to match. Thanks Miles!
2002-07-10Patch from Ronald Wahl <rwa@peppercon.com> to fix a memory leakEric Andersen
2002-01-17Fix simple malloc to work on systems with an MMUDavid McCullough
2001-08-09Fix a couple of warningsDavid McCullough
2001-04-27Patch from Tom Walsh <tom@cyberiansoftware.com> to fix a thinkoEric Andersen
on my patch.
2001-04-25Be more strict with the malloc implementation. Return NULLEric Andersen
when folks do a malloc(0) using malloc-simple. -Erik
2001-03-19Fix up breakage resulting from flipping the sense of some defines. Change fromEric Andersen
defining things to "0" in the disabled case to outright undefining them, lest code that does an "#ifdef FOO" get inadvertantly triggered. Remove now unneeded lines from Rules.mak which makes the command line smaller and avoids redundancy (since this stuff is now pulled in via features.h). -Erik
2001-02-13Use MAP_FAILED.Eric Andersen
2001-01-12Patch from James Graves <jgraves@deltamobile.com> to better handle m68k.Eric Andersen
Also fixes 2 very important malloc bugs! Anyone using malloc (esp mmu-less) should update and recompile. -Erik
2000-10-11Finish reorganizing things. At least I think I've finished.Eric Andersen
2000-10-09Bug ugly formatting updateEric Andersen
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