__libc_stack_end is made into a weak symbol if possible.  If libc is
not linked, read args and environment from /proc.

llvm-svn: 182276

llvm-svn: 181787

This change moves to a model where the error value of a system call is
potentially contained in the return value itself rather than being
implicit in errno.  The helper function internal_iserror can be used
to extract the error value from a return value.  On platforms other
than Linux/x86_64 this still uses errno, but other platforms are free
to port their error handling to this new model.

Differential Revision: http://llvm-reviews.chandlerc.com/D756

llvm-svn: 181436

llvm-svn: 181330

llvm-svn: 181327

Move this function to sanitizer_common because LSan uses it too. Also, fix a bug
where the TLS range reported for main thread was off by the size of the thread
descriptor from libc (TSan doesn't care much, but for LSan it's critical).

llvm-svn: 181322

With this change, __internal_*stat always expect a "struct stat *" argument.
This avoids stat/stat64 caller-side confusion (sanitizer_common tests already
made this mistake), and allows the use of __internal_fstat() as a drop-in
replacement for libc's fstat().

llvm-svn: 181311

llvm-svn: 180602

llvm-svn: 180599

llvm-svn: 180098

llvm-svn: 180082

llvm-svn: 178855

llvm-svn: 178627

a flag to skip cache update for cases when that's unacceptable (e.g. lsan).

Patch by Sergey Matveev (earthdok@google.com)

llvm-svn: 178000

llvm-svn: 177857

tsan: use a single background thread for memory profiler and memory flush (and later for symbolizer flush)

llvm-svn: 177627

llvm-svn: 177510

llvm-svn: 177400

llvm-svn: 177384

Moved this code to sanitizer_common.

llvm-svn: 177383

llvm-svn: 177072

llvm-svn: 176938

llvm-svn: 176932

[Sanitizer] Change MemoryMappingLayout methods to also report memory protection flags (for future use in leak checker). Patch by Sergey Matveev.

llvm-svn: 176931

llvm-svn: 176805

llvm-svn: 176183

ThreadLister is a Linux-specific class for obtaining the thread IDs of a process from procfs (/proc/<pid>/task/). It will be used by leak checking code.
Also add several syscall wrappers which will be required by the same code that uses ThreadLister, but are not used in ThreadLister itself.
Patch by Sergey Matveev

llvm-svn: 176179

llvm-svn: 175622

execle(argv[0], ...) is wrong, because argv[0] may contain a PATH-resolvable
program name. Execute /proc/self/exe instead.

llvm-svn: 175504

/proc/$PID/cmdline is clipped to 4Kb.
Locate argv and envp on the main thread stack.

llvm-svn: 175163

We are still limited by /proc/*/cmdline size (4Kb max on Linux!).

llvm-svn: 175145

llvm-svn: 174316

llvm-svn: 174189

llvm-svn: 174187

asan/tsan: manually define FUTEX constants, because <linux/futes.h> header is broken on some linux distributions

llvm-svn: 173933

It is possible for ReExec to be called before the C standard library
has initialised itself sufficiently for execv to work properly.
Fix this by parsing the environment ourselves and using execve.

Differential Revision: http://llvm-reviews.chandlerc.com/D304

llvm-svn: 172748

llvm-svn: 172523

llvm-svn: 172389

llvm-svn: 172387

llvm-svn: 172385