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

llvm-svn: 175504

llvm-svn: 175503

llvm-svn: 175499

llvm-svn: 175498

[asan] enable asan_prelink_test when gold is the default linker (gold and bfd linker have different flag syntax)

llvm-svn: 175431

[asan] added flag -d|--demangle to asan_symbolize.py, makes addr2line/llvm-symbolizer demangle the functions names

llvm-svn: 175429

llvm-svn: 175424

llvm-svn: 175285

llvm-svn: 175284

MaybeReexec() does now a tricky job to manage DYLD_INSERT_LIBRARIES in a safe way.

Because we're using library interposition, it's critical for an instrumented app
to be executed with the runtime library present in DYLD_INSERT_LIBRARIES list.
Therefore if it's initially missing in that list, we append the runtime library name
to the value of DYLD_INSERT_LIBRARIES and then exec() ourselves.

On the other hand, some of the apps exec()ed by our program may not want to have
ASan runtime library preloaded, so we remove the runtime library from the
DYLD_INSERT_LIBRARIES if it's already there.

Users may want to preload other libraries using DYLD_INSERT_LIBRARIES, so we preserve those.

llvm-svn: 175276

When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem    ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem     ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow  ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap  ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow  ||
|| [0x000000000000, 0x00007fff7fff] || LowMem     ||

Do it only if necessary.

Also added a bit of profiling code to make sure that the
mapping code is efficient.

Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.

Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.

Patch partially by Jakub Jelinek.

llvm-svn: 175263

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

llvm-svn: 175163

llvm-svn: 175157

The test may hang now if a regression occurs.

llvm-svn: 175155

llvm-svn: 175153

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

llvm-svn: 175145

[asan] use short path for sanitizer_common/tests/sanitizer_test_utils.h, add -I sanitizer_common/tests to asan/tests/CMakeLists.txt

llvm-svn: 175142

llvm-svn: 175140

llvm-svn: 175137

base-to-derived casts have undefined behavior if the object is not actually an
instance of the derived type. Runtime library part.

llvm-svn: 175079

[ASan] When re-executing the process on OS X, make sure we update the existing DYLD_INSERT_LIBRARIES correctly.
Previously ASan used to hang in an exec loop, because it failed to overwrite the env var value
(see https://code.google.com/p/address-sanitizer/issues/detail?id=159).

llvm-svn: 175059

better memory range access functions (put only 1 event to trace) (Go)

llvm-svn: 175056

llvm-svn: 175049

[msan] don't check shadow inside interceptors if we are inside symbolizer; add weak function __msan_default_options that overrides default options

llvm-svn: 175040

llvm-svn: 175037

llvm-svn: 175013

llvm-svn: 174971

llvm-svn: 174970

In __isoc99_*scanf we don't have to worry about GNUisms, and can parse
%a accurately.

Patch by Jakub Jelinek.

llvm-svn: 174969

llvm-svn: 174965

llvm-svn: 174962

llvm-svn: 174960

[asan] change the default mapping offset on x86_64 to 0x7fff8000. This gives roughly 5% speedup. Since this is an ABI change, bump the asan ABI version by renaming __asan_init to __asan_init_v1. compiler-rt part

llvm-svn: 174958

llvm-svn: 174956

llvm-svn: 174888

Respect REAL(scanf) return value and don't report memory stores that
could potentially happen, but did not.

llvm-svn: 174887

llvm-svn: 174883

Handle %a in cases when it is unambiguous.
Handle %m.

Patch by Jakub Jelinek.

llvm-svn: 174882

Build system setup for MSan lit tests (build with freshly-built clang, run,
check output) - a nearly exact copy from ASan.
First 2 lit tests for MSan.

llvm-svn: 174876

llvm-svn: 174875