Add ASAN instructions, llvm-symbolizer instructions for fuzzers. Remove Apache Kudu cruft from run-test.sh

Change-Id: Ib97dbdb32e3f4da4919584e29f17db55bfb964a5

cpp/README.md

@@ -99,7 +99,14 @@ and benchmarks or `make runbenchmark` to run only the benchmark tests.
 
 Benchmark logs will be placed in the build directory under `build/benchmark-logs`.
 
-## Building/Running fuzzers
+### Testing with LLVM AddressSanitizer
+
+To use AddressSanitizer (ASAN) to find bad memory accesses or leaks with LLVM,
+pass `-DARROW_USE_ASAN=ON` when building. You must use clang to compile with
+ASAN, and `ARROW_USE_ASAN` is mutually-exclusive with the valgrind option
+`ARROW_TEST_MEMCHECK`.
+
+### Building/Running fuzzers
 
 Fuzzers can help finding unhandled exceptions and problems with untrusted input that
 may lead to crashes, security issues and undefined behavior. They do this by
@@ -128,6 +135,22 @@ stack trace as well as the input data. After a problem was found this way, it sh
 be reported and fixed. Usually, the fuzzing process cannot be continued until the
 fix is applied, since the fuzzer usually converts to the problem again.
 
+If you build fuzzers with ASAN, you need to set the `ASAN_SYMBOLIZER_PATH`
+environment variable to the absolute path of `llvm-symbolizer`, which is a tool
+that ships with LLVM.
+
+```shell
+export ASAN_SYMBOLIZER_PATH=$(type -p llvm-symbolizer)
+```
+
+Note that some fuzzer builds currently reject paths with a version qualifier
+(like `llvm-sanitizer-5.0`). To overcome this, set an appropriate symlink
+(here, when using LLVM 5.0):
+
+```shell
+ln -sf /usr/bin/llvm-sanitizer-5.0 /usr/bin/llvm-sanitizer
+```
+
 There are some problems that may occur during the compilation process:
 
 - libfuzzer was not distributed with your LLVM: `ld: file not found: .../libLLVMFuzzer.a`

cpp/build-support/run-test.sh

@@ -88,12 +88,6 @@ function setup_sanitizers() {
   # Set up suppressions for LeakSanitizer
   LSAN_OPTIONS="$LSAN_OPTIONS suppressions=$ROOT/build-support/lsan-suppressions.txt"
   export LSAN_OPTIONS
-
-  # Suppressions require symbolization. We'll default to using the symbolizer in
-  # thirdparty.
-  if [ -z "$ASAN_SYMBOLIZER_PATH" ]; then
-    export ASAN_SYMBOLIZER_PATH=$(find $NATIVE_TOOLCHAIN/llvm-3.7.0/bin -name llvm-symbolizer)
-  fi
 }
 
 function run_test() {