Add AddressSanitizer to fuzzer analysis

fuzzer/go/common/build_skia.go

 package common
 
 import (
         "fmt"
         "os"
         "path/filepath"
 
         "github.com/skia-dev/glog"
         "go.skia.org/infra/fuzzer/go/config"
         "go.skia.org/infra/go/exec"
 )
 
-// BuildClangHarness builds the test harness for parsing skp files using clang.  If any step fails, it returns an error.
+// BuildClangHarness builds the test harness for parsing skp files using clang. If any step fails,
+// it returns an error.
 func BuildClangHarness(buildType string, isClean bool) error {
+        glog.Infof("Building %s clang harness", buildType)
         buildVars := []string{
                 fmt.Sprintf("CC=%s", config.Common.ClangPath),
                 fmt.Sprintf("CXX=%s", config.Common.ClangPlusPlusPath),
         }
         return buildHarness(buildType, isClean, buildVars)
 }
 
-// BuildFuzzingHarness builds the test harness for parsing skp files using afl-instrumented clang.  If any step fails, it returns an error.
+// BuildASANHarness builds the test harness for parsing skp files using clang and AddressSanitizer.
+// If any step fails, it returns an error.
+func BuildASANHarness(buildType string, isClean bool) error {
+        glog.Infof("Building %s ASAN harness", buildType)
+        buildVars := []string{
+                fmt.Sprintf("CC=%s", config.Common.ClangPath),
+                fmt.Sprintf("CXX=%s", config.Common.ClangPlusPlusPath),
+                "CXXFLAGS=-O1 -g -fsanitize=address -fno-omit-frame-pointer",
+                "LDFLAGS=-g -fsanitize=address",
+                ASAN_OPTIONS,
+        }
+        return buildHarness(buildType, isClean, buildVars)
+}
+
+// BuildFuzzingHarness builds the test harness for parsing skp files using afl-instrumented clang.
+// If any step fails, it returns an error.
 func BuildFuzzingHarness(buildType string, isClean bool) error {
+        glog.Infof("Building %s fuzzing harness", buildType)
         buildVars := []string{
                 fmt.Sprintf("CC=%s", filepath.Join(config.Generator.AflRoot, "afl-clang")),
                 fmt.Sprintf("CXX=%s", filepath.Join(config.Generator.AflRoot, "afl-clang++")),
         }
 
         return buildHarness(buildType, isClean, buildVars)
 }
 
 // buildHarness builds the test harness for parsing skp (and other) files.
 // First it creates a hard link for the gyp and cpp files. The gyp file is linked into Skia's gyp folder and the cpp file is linked into SKIA_ROOT/../fuzzer_cache/src, which is where the gyp file is configured to point.
 // Then it activates Skia's gyp command, which creates the build (ninja) files.
 // Finally, it runs those build files.
 // If any step fails in unexpected ways, it returns an error.
 func buildHarness(buildType string, isClean bool, buildVars []string) error {
-        glog.Infof("Building %s fuzzing harness", buildType)
-
         // clean previous build if specified
         buildLocation := filepath.Join("out", buildType)
         if isClean {
                 if err := os.RemoveAll(filepath.Join(config.Generator.SkiaRoot, buildLocation)); err != nil {
                         return fmt.Errorf("Could not clear out %s before building: %s", filepath.Join(config.Generator.SkiaRoot, buildLocation), err)
                 }
         }
 
         gypCmd := &exec.Command{
                 Name:      "./gyp_skia",
                 Dir:       config.Generator.SkiaRoot,
-                LogStdout: false,
-                LogStderr: false,
+                LogStdout: config.Common.VerboseBuilds,
+                LogStderr: config.Common.VerboseBuilds,
                 Env:       append(buildVars, "GYP_DEFINES=skia_clang_build=1"),
         }
 
         // run gyp
         if err := exec.Run(gypCmd); err != nil {
                 return fmt.Errorf("Failed gyp: %s", err)
         }
 
         ninjaPath := filepath.Join(config.Common.DepotToolsPath, "ninja")
 
         ninjaCmd := &exec.Command{
                 Name:        ninjaPath,
                 Args:        []string{"-C", buildLocation, "fuzz"},
-                LogStdout:   true,
+                LogStdout:   config.Common.VerboseBuilds,
                 LogStderr:   true,
                 InheritPath: true,
                 Dir:         config.Generator.SkiaRoot,
                 Env:         buildVars,
         }
 
         // run ninja
         return exec.Run(ninjaCmd)
 }