src/libexec/rtld-elf/malloc.c, branch release/9.0.0

Rtld links with the specially built pic static libc library to get some

2011-08-24T20:05:13Z

C runtime services, like printf(). Unfortunately, the multithread-safeness measures in the libc do not work in rtld environment. Rip the kernel printf() implementation and use it in the rtld instead of libc version. This printf does not require any shared global data and thus is mt-safe. Systematically use rtld_printf() and related functions, remove the calls to err(3). Note that stdio is still pulled from libc due to libmap implementaion using fopen(). This is safe but unoptimal, and can be changed later. Reported and tested by: pgj Diagnosed and reviewed by: kan (previous version) Approved by: re (bz)

Use the newly provided aux vectors to get pagesize and osreldate information.

2010-08-17T09:05:39Z

Use local version of getpagesize(), rtld_getpagesize() in private allocator. Override the __getosreldate() previously fetched from libc_pic.a with local version that uses aux value if present. Note that __getosreldate() is used by rtld indirectly, by mmap(2) libc wrapper. To be able to utilize aux, split digest_dynamic() for use by init_rtld() into two parts, where the first one does not call malloc(), and the second part uses it. init_rtld() is able to initialize global variables before digest_dynamic2() calls. In particular, pagesize and osreldate are set up from the aux values. Now, rtld avoids (two) sysctl calls in startup. Tested by: marius (sparc64) MFC after: 1 month

In preparation for a new malloc implementation:

2006-01-12T07:28:21Z

* Add posix_memalign(). * Move calloc() from calloc.c to malloc.c. Add a calloc() implementation in rtld-elf in order to make the loader happy (even though calloc() isn't used in rtld-elf). * Add _malloc_prefork() and _malloc_postfork(), and use them instead of directly manipulating __malloc_lock. Approved by: phk, markm (mentor)

Very minor style nit: sort include files alphabetically.

2003-08-22T02:22:59Z

Fix signed/unsigned comparison warnings.

2003-05-04T00:56:00Z

Add missing include files I forgot about in previous commit.

2003-02-13T17:35:00Z

Remove /usr/lib/elf from a default search path.

2003-02-13T17:05:10Z

Move xprintf to malloc.c, it is only used there. Make static. Submitted by: phantom

Include stddef.h for NULL definition, rather than rolling our own here.

2002-08-21T19:03:26Z

Reviewed by: jdp

Change brk's prototype from char brk(const char ) to int brk(const void *)

2002-01-24T12:11:31Z

and sbrk's prototype from char *sbrk(int) to void *sbrk(intptr_t). This makes us more consistant with NetBSD and standards which include these functions. Bruce pointed out that ptrdiff_t would probably have been better than intptr_t, but this doesn't match other implimentations. Also remove local declarations of sbrk and unnecessary casting. PR: 32296 Tested by: Harti Brandt MFC after: 1 month

Add `_PATH_DEVZERO'.

2000-12-09T09:35:55Z

Use _PATH_* where where possible.