ee7d41d179
For an odr-violation error due to a source file linked into two DSOs, or
one DSO and the main executable, it can be difficult to identify the DSO
name. Let's print the module name in the error report.
```
echo 'extern long var; int main() { return var; }' > a.cc
echo 'long var;' > b.cc
clang++ -fpic -fsanitize=address -shared b.cc -o b.so
clang++ -fsanitize=address a.cc b.cc ./b.so -o a
```
w/o this patch:
```
==1375386==ERROR: AddressSanitizer: odr-violation (0x56067cb06240):
[1] size=8 'var' b.cc
[2] size=8 'var' b.cc
...
```
w/ this patch:
```
==1375386==ERROR: AddressSanitizer: odr-violation (0x56067cb06240):
[1] size=8 'var' b.cc in /tmp/c/a
[2] size=8 'var' b.cc in ./b.so
```
In addition, update the `report_globals=2` message to include the module
name
```
==1451005==Added Global[0x7fcfe59ae040]: beg=0x7fcfe59ae140 size=8/32 name=var source=b.cc module=./b.so dyn_init=0 odr_indicator=0x55754f939260
```
AddressSanitizer RT
================================
This directory contains sources of the AddressSanitizer (ASan) runtime library.
Directory structure:
README.txt : This file.
Makefile.mk : File for make-based build.
CMakeLists.txt : File for cmake-based build.
asan_*.{cc,h} : Sources of the asan runtime library.
scripts/* : Helper scripts.
tests/* : ASan unit tests.
Also ASan runtime needs the following libraries:
lib/interception/ : Machinery used to intercept function calls.
lib/sanitizer_common/ : Code shared between various sanitizers.
ASan runtime currently also embeds part of LeakSanitizer runtime for
leak detection (lib/lsan/lsan_common.{cc,h}).
ASan runtime can only be built by CMake. You can run ASan tests
from the root of your CMake build tree:
make check-asan
For more instructions see:
https://github.com/google/sanitizers/wiki/AddressSanitizerHowToBuild