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`__asan_handle_no_return()` function.
It was pointed out that compiler-rt has always defined the symbol, but only
recently added it to the public headers. Meaning that libc++abi can re-declare
it instead of needing this macro.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@313306 91177308-0d34-0410-b5e6-96231b3b80d8
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function.
Summary:
Libc++abi attempts to use the newly added `__asan_handle_no_return()` when built under ASAN. Unfortunately older versions of compiler-rt do not provide this symbol, and so libc++abi needs a way to detect if `asan_interface.h` actually provides the function.
This patch adds the macro `SANITIZER_ASAN_INTERFACE_HAS_HANDLE_NO_RETURN` which can be used to detect the availability of the new function.
Reviewers: phosek, kcc, vitalybuka, alekseyshl
Reviewed By: phosek
Subscribers: mclow.lists, cfe-commits
Differential Revision: https://reviews.llvm.org/D37871
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@313303 91177308-0d34-0410-b5e6-96231b3b80d8
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Heretofore asan_handle_no_return was used only by interceptors,
i.e. code private to the ASan runtime. However, on systems without
interceptors, code like libc++abi is built with -fsanitize=address
itself and should call asan_handle_no_return directly from
__cxa_throw so that no interceptor is required.
Patch by Roland McGrath
Differential Revision: https://reviews.llvm.org/D36811
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311869 91177308-0d34-0410-b5e6-96231b3b80d8
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all sanitizers.
Summary:
Merge "exitcode" flag from ASan, LSan, TSan and "exit_code" from MSan
into one entity. Additionally, make sure sanitizer_common now uses the
value of common_flags()->exitcode when dying on error, so that this
flag will automatically work for other sanitizers (UBSan and DFSan) as
well.
User-visible changes:
* "exit_code" MSan runtime flag is now deprecated. If explicitly
specified, this flag will take precedence over "exitcode".
The users are encouraged to migrate to the new version.
* __asan_set_error_exit_code() and __msan_set_exit_code() functions
are removed. With few exceptions, we don't support changing runtime
flags during program execution - we can't make them thread-safe.
The users should use __sanitizer_set_death_callback()
that would call _exit() with proper exit code instead.
* Plugin tools (LSan and UBSan) now inherit the exit code of the parent
tool. In particular, this means that ASan would now crash the program
with exit code "1" instead of "23" if it detects leaks.
Reviewers: kcc, eugenis
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12120
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@245734 91177308-0d34-0410-b5e6-96231b3b80d8
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__asan_set_death_callback
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@224286 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@219632 91177308-0d34-0410-b5e6-96231b3b80d8
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extraction and locating addresses
Reviewed at http://reviews.llvm.org/D4527
Fixed a test case failure on 32-bit Linux, I did right shift on intptr_t, instead it should have been uintptr_t.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@218538 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@218501 91177308-0d34-0410-b5e6-96231b3b80d8
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addresses
Reviewed at http://reviews.llvm.org/D4527
This patch is part of an effort to implement a more generic debugging API, as proposed in http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-July/074656.html, with first part reviewed at http://reviews.llvm.org/D4466. Now adding several new APIs: __asan_report_present, __asan_get_report_{pc,bp,sp,address,type,size,description}, __asan_locate_address. These return whether an asan report happened yet, the PC, BP, SP, address, access type (read/write), access size and bug description (e.g. "heap-use-after-free"), __asan_locate_address takes a pointer and tries to locate it, i.e. say whether it is a heap pointer, a global or a stack, or whether it's a pointer into the shadow memory. If global or stack, tries to also return the variable name, address and size. If heap, tries to return the chunk address and size. Generally these should serve as an alternative to "asan_describe_address", which only returns all the data in text form. Having an API to get these data could allow having debugging scripts/extensions that could show additional information about a variable/expression/pointer. Test cases in test/asan/TestCases/debug_locate.cc and test/asan/TestCasea/debug_report.cc.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@218481 91177308-0d34-0410-b5e6-96231b3b80d8
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favor of
a unified interface in <sanitizer/allocator_interface.h>.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@215469 91177308-0d34-0410-b5e6-96231b3b80d8
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memory mapping info
Reviewed at http://reviews.llvm.org/D4466
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@213080 91177308-0d34-0410-b5e6-96231b3b80d8
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Introduce new public header <sanitizer/allocator_interface.h> and a set
of functions __sanitizer_get_ownership(), __sanitizer_malloc_hook() etc.
that will eventually replace their tool-specific equivalents
(__asan_get_ownership(), __msan_get_ownership() etc.). Tool-specific
functions are now deprecated and implemented as stubs redirecting
to __sanitizer_ versions (which are implemented differently in each tool).
Replace all uses of __xsan_ versions with __sanitizer_ versions in unit
and lit tests.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@212469 91177308-0d34-0410-b5e6-96231b3b80d8
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are usable in plain C
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@206160 91177308-0d34-0410-b5e6-96231b3b80d8
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garbage colection to work with asan's fake stack
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200908 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@197670 91177308-0d34-0410-b5e6-96231b3b80d8
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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.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@175263 91177308-0d34-0410-b5e6-96231b3b80d8
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that makes sure users can include interface header
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174058 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172815 91177308-0d34-0410-b5e6-96231b3b80d8
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running asan-ified binary under a debugger (e.g. gdb)
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@171217 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@171199 91177308-0d34-0410-b5e6-96231b3b80d8
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hooks on Linux: don't provide a default no-op implementations for hooks in runtime, and optionally call hooks if they are provided by the user. Don't force weak interface functions into runtime.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@169641 91177308-0d34-0410-b5e6-96231b3b80d8
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these functions are inserted by the instrumentation pass in use-after-scope mode
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@169201 91177308-0d34-0410-b5e6-96231b3b80d8
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__asan_on_error, so that ASan would call the latter even if it finds the error early (i.e. during module initialization)
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@165008 91177308-0d34-0410-b5e6-96231b3b80d8
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Fall back to module+offset if user-provided symbolizer failed. Use weak function __asan_symbolize instead of __asan_set_symbolize_callback in ASan interface, so that we're able to symbolize reports for errors that happen before the main() is called, for example, during module initialization.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@165000 91177308-0d34-0410-b5e6-96231b3b80d8
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library.
These headers are intended to be available to user code when built with
AddressSanitizer (or one of the other sanitizer's in the future) to
interface with the runtime library. As such, they form stable external
C interfaces, and the headers shouldn't be located within the
implementation.
I've pulled them out into what seem like fairly obvious locations and
names, but I'm wide open to further bikeshedding of these names and
locations.
I've updated the code and the build system to cope with the new
locations, both CMake and Makefile. Please let me know if this breaks
anyone's build.
The eventual goal is to install these headers along side the Clang
builtin headers when we build the ASan runtime and install it. My
current thinking is to locate them at:
<prefix>/lib/clang/X.Y/include/sanitizer/common_interface_defs.h
<prefix>/lib/clang/X.Y/include/sanitizer/asan_interface.h
<prefix>/lib/clang/X.Y/include/sanitizer/...
But maybe others have different suggestions?
Fixing the style of the #include between these headers at least unblocks
experimentation with installing them as they now should work when
installed in these locations.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@162822 91177308-0d34-0410-b5e6-96231b3b80d8
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