llvm-svn: 176183

[UBSan] Use common report decorator to print colorful diagnostics in UBSan, and be more consistent w/ Printf/RawWrite

llvm-svn: 176182

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: 176175

llvm-svn: 176091

[sanitizer] A low-level vector implementation to be used in leak checking code. Patch by Sergey Matveev

llvm-svn: 176089

llvm-svn: 176085

llvm-svn: 176077

llvm-svn: 176020

[Sanitizer] fix signed/unsigned compare warnings in sanitizer_stacktrace_test. Build sanitizer_common tests with -Werror as we use predictable just-built Clang for building them

llvm-svn: 176014

Summary:
The test sets up fake x86-style fp+retaddr frames, since that's all the
unwinder works with.

Reviewers: kcc

CC: eugenis

Differential Revision: http://llvm-reviews.chandlerc.com/D445

llvm-svn: 175893

Using > instead of >= ensures that each frame deref makes progress and
that we eventually terminate.

Issue: https://code.google.com/p/address-sanitizer/issues/detail?id=162
llvm-svn: 175661

llvm-svn: 175629

llvm-svn: 175622

llvm-svn: 175615

llvm-svn: 175515

This way it fits on a random 1G device.

llvm-svn: 175513

llvm-svn: 175511

This patch makes asan instrument memory accesses with unusual sizes (e.g. 5 bytes or 10 bytes), e.g. long double or
packed structures.
Instrumentation is done with two 1-byte checks
(first and last bytes) and if the error is found
__asan_report_load_n(addr, real_size) or
__asan_report_store_n(addr, real_size)
is called.

asan-rt part

Also fix lint.

llvm-svn: 175508

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: 175424

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

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

llvm-svn: 175145

llvm-svn: 174971

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: 174960

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

llvm-svn: 174708

llvm-svn: 174707

llvm-svn: 174706

llvm-svn: 174705

This a rewrite of the scanf parser. The new implementation is pretty close to
the spec, with a few shortcuts taken here and there. It is conservative, i.e.
it gives up parsing if it does not understand some part of the format string,
or runs into an ambiguous % spec. It does not handle some rarely used parts of
the spec, like %n$ - for now.

I'm also moving parser call to after the original *scanf function completes,
so that we can find out the store size of %s directive by the use of strlen()
on the target buffer.

llvm-svn: 174704

llvm-svn: 174617

llvm-svn: 174616