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59 Commits

Author SHA1 Message Date
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