Commit Graph

25 Commits

Author SHA1 Message Date
Kuba Brecka db22cd1721 [compiler-rt] revert r218481 due to test failure on sanitizer-x86_64-linux
llvm-svn: 218501
2014-09-26 05:25:37 +00:00
Kuba Brecka e37e089b66 [compiler-rt] ASan debugging API for report info extraction and locating 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.

llvm-svn: 218481
2014-09-25 23:53:57 +00:00
Kostya Serebryany ac77055272 [asan] introduce __asan_load_cxx_array_cookie: check that the array cookie address is properly poisoned and return the cookie value. If not, return 0 to avoid infinite loop of DTORs (in case of use-after-free). Calls to this function will be inserted by clang (separate change)
llvm-svn: 216692
2014-08-28 22:28:04 +00:00
Alexey Samsonov b9ec65cd4d [Sanitizer] Kill deprecated allocator interfaces in ASan, MSan and TSan in favor of
a unified interface in <sanitizer/allocator_interface.h>.

llvm-svn: 215469
2014-08-12 20:28:20 +00:00
Kostya Serebryany 522c35eb80 [asan] introduce __asan_poison_cxx_array_cookie. This is asan-rt part of PR19838 (Left OOB accesses on new[]-allocated arrays with array cookies are not detected). No tests yet. They will follow once I commit the clang part.
llvm-svn: 214711
2014-08-04 12:43:13 +00:00
Kuba Brecka 58f44dce96 [ASan] Add ASan debugging API to get malloc/free stack traces and shadow memory mapping info
Reviewed at http://reviews.llvm.org/D4466

llvm-svn: 213080
2014-07-15 17:33:23 +00:00
Timur Iskhodzhanov 9e4580c8ee [ASan] Only define macros in asan_init_version.h, move the __asan_init declaration back to asan_interface_internal.h
This fixes the issues we've uncovered after landing r212815.

Reviewed at http://reviews.llvm.org/D4500

llvm-svn: 213053
2014-07-15 08:16:04 +00:00
Timur Iskhodzhanov 3eb1f4bb90 [ASan/Win] Don't hardcode ASan runtime version in ASan dll thunk
Reviewed at http://reviews.llvm.org/D4459

llvm-svn: 212699
2014-07-10 10:33:48 +00:00
Alexey Samsonov 91bb8e0e3a Generalize sanitizer allocator public interface.
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.

llvm-svn: 212469
2014-07-07 17:39:31 +00:00
Alexey Samsonov 4f319cca42 [ASan] Print exact source location of global variables in error reports.
See https://code.google.com/p/address-sanitizer/issues/detail?id=299 for the
original feature request.

Introduce llvm.asan.globals metadata, which Clang (or any other frontend)
may use to report extra information about global variables to ASan
instrumentation pass in the backend. This metadata replaces
llvm.asan.dynamically_initialized_globals that was used to detect init-order
bugs. llvm.asan.globals contains the following data for each global:
  1) source location (file/line/column info);
  2) whether it is dynamically initialized;
  3) whether it is blacklisted (shouldn't be instrumented).

Source location data is then emitted in the binary and can be picked up
by ASan runtime in case it needs to print error report involving some global.
For example:

  0x... is located 4 bytes to the right of global variable 'C::array' defined in '/path/to/file:17:8' (0x...) of size 40

These source locations are printed even if the binary doesn't have any
debug info.

This is an ABI-breaking change. ASan initialization is renamed to
__asan_init_v4(). Pre-built libraries compiled with older Clang will not work
with the fresh runtime.

llvm-svn: 212188
2014-07-02 16:54:41 +00:00
Alp Toker 1ee7fc7a1a Fix typos
llvm-svn: 208841
2014-05-15 02:22:34 +00:00
Kostya Serebryany 632751539e [asan] add __asan_memset and friends
llvm-svn: 206748
2014-04-21 11:58:25 +00:00
Kostya Serebryany 3d2629c514 [asan] implement __asan_loadN/__asan_storeN for out-lined asan checks
llvm-svn: 206733
2014-04-21 07:09:01 +00:00
Kostya Serebryany ae401ca5e7 [asan] add __asan_load1/__asan_store1/... callbacks to asan-rt; together with -mllvm -asan-instrumentation-with-call-threshold=N this will be a workaround for PR17409
llvm-svn: 206387
2014-04-16 13:52:28 +00:00
Kostya Serebryany 90527cb324 [asan] don't use bool in public interface, make sure the interface headers are usable in plain C
llvm-svn: 206160
2014-04-14 11:16:53 +00:00
Alexey Samsonov cef2e14382 [ASan] Get rid of __asan_symbolize function
llvm-svn: 197670
2013-12-19 11:08:47 +00:00
Kostya Serebryany c3d43ca3ec [asan] add a run-time option detect_stack_use_after_return, add verbosity output for fake stack
llvm-svn: 190932
2013-09-18 10:35:12 +00:00
Kostya Serebryany 8fc35ca008 [asan] refactor the use-after-return API so that the size class is computed at compile time instead of at run-time. compiler-rt part
llvm-svn: 190406
2013-09-10 13:16:26 +00:00
Timur Iskhodzhanov eee13914e2 Define SANITIZER_INTERFACE_ATTRIBUTE on Windows and fix all the places where SANITIZER_INTERFACE_ATTRIBUTE or SANITIZER_ATTRIBUTE_WEAK are used
llvm-svn: 188261
2013-08-13 11:42:45 +00:00
Alexey Samsonov 56a784d2f6 [ASan] Change the ABI of __asan_before_dynamic_init function: now it takes pointer to private string with module name. This string serves as a unique module ID in ASan runtime. compiler-rt part
llvm-svn: 178014
2013-03-26 13:06:12 +00:00
Kostya Serebryany 667a34a120 [asan] Change the way we report the alloca frame on stack-buff-overflow.
Before: the function name was stored by the compiler as a constant string
and the run-time was printing it.
Now: the PC is stored instead and the run-time prints the full symbolized frame.
This adds a couple of instructions into every function with non-empty stack frame,
but also reduces the binary size because we store less strings (I saw 2% size reduction).
This change bumps the asan ABI version to v3.

compiler-rt part, llvm part will follow.

Example of report (now):
==31711==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fffa77cf1c5 at pc 0x41feb0 bp 0x7fffa77cefb0 sp 0x7fffa77cefa8
READ of size 1 at 0x7fffa77cf1c5 thread T0
    #0 0x41feaf in Frame0(int, char*, char*, char*) stack-oob-frames.cc:20
    #1 0x41f7ff in Frame1(int, char*, char*) stack-oob-frames.cc:24
    #2 0x41f477 in Frame2(int, char*) stack-oob-frames.cc:28
    #3 0x41f194 in Frame3(int) stack-oob-frames.cc:32
    #4 0x41eee0 in main stack-oob-frames.cc:38
    #5 0x7f0c5566f76c (/lib/x86_64-linux-gnu/libc.so.6+0x2176c)
    #6 0x41eb1c (/usr/local/google/kcc/llvm_cmake/a.out+0x41eb1c)
Address 0x7fffa77cf1c5 is located in stack of thread T0 at offset 293 in frame
    #0 0x41f87f in Frame0(int, char*, char*, char*) stack-oob-frames.cc:12  <<<<<<<<<<<<<< this is new
  This frame has 6 object(s):
    [32, 36) 'frame.addr'
    [96, 104) 'a.addr'
    [160, 168) 'b.addr'
    [224, 232) 'c.addr'
    [288, 292) 's'
    [352, 360) 'd'

llvm-svn: 177723
2013-03-22 10:36:24 +00:00
Kostya Serebryany c4722a65a5 [asan] while generating the description of a global variable, emit the module name in a separate field, thus not duplicating this information if every description. This decreases the binary size (observed up to 3%). https://code.google.com/p/address-sanitizer/issues/detail?id=168 . This changes the asan API version. compiler-rt part, llvm-part will follow
llvm-svn: 177253
2013-03-18 08:04:55 +00:00
Kostya Serebryany 4681fbf002 [tsan] simplify tsan-vs-gvn test since gvn vs tsan is now fixed; fix lint
llvm-svn: 175037
2013-02-13 06:07:50 +00:00
Kostya Serebryany 2659e96e4b [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
2013-02-12 11:11:58 +00:00
Alexey Samsonov a0c0da8f51 [ASan] Split ASan interface header into private and public parts. Add a test that makes sure users can include interface header
llvm-svn: 174058
2013-01-31 13:46:14 +00:00