From 5ed972de757799839c638d469aa96b9c9d2353fc Mon Sep 17 00:00:00 2001
From: AdamKorcz <44787359+AdamKorcz@users.noreply.github.com>
Date: Thu, 1 Apr 2021 02:48:35 +0100
Subject: [PATCH] [lotus] Fix coverage build (#5544)

---
 projects/lotus/Dockerfile |  6 +++---
 projects/lotus/build.sh   | 21 +++++++++++++++++++--
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/projects/lotus/Dockerfile b/projects/lotus/Dockerfile
index 1a4b2df6a..08dccff6a 100644
--- a/projects/lotus/Dockerfile
+++ b/projects/lotus/Dockerfile
@@ -17,7 +17,7 @@
 FROM gcr.io/oss-fuzz-base/base-builder
 RUN apt-get update && apt-get install -y mesa-opencl-icd ocl-icd-opencl-dev gcc \
     git bzr jq pkg-config curl clang build-essential hwloc libhwloc-dev
-RUN git clone --depth 1 https://github.com/filecoin-project/lotus $GOPATH/src/github.com/filecoin-project/lotus
-RUN git clone --depth 1 https://github.com/filecoin-project/fuzzing-lotus $GOPATH/src/github.com/filecoin-project/fuzzing-lotus
+RUN git clone --depth 1 https://github.com/filecoin-project/lotus
+RUN git clone --depth 1 https://github.com/filecoin-project/fuzzing-lotus
 COPY build.sh $SRC/
-WORKDIR $GOPATH/src/github.com/filecoin-project/lotus
+WORKDIR $SRC/lotus
diff --git a/projects/lotus/build.sh b/projects/lotus/build.sh
index d0de20761..64603099b 100644
--- a/projects/lotus/build.sh
+++ b/projects/lotus/build.sh
@@ -17,10 +17,26 @@
 
 make
 
-compile_go_fuzzer github.com/filecoin-project/lotus/chain/types FuzzMessage fuzz_message gofuzz
+# Not all fuzzers can be compiled with --sanitizer=coverage.
+# The specific issue is that gofuzz.NewFromGofuzz is not supported when compiling with coverage.
+# The current status of the coverage build is that we do not break it for the fuzzers that cannot be compiled.
+#The reason that we don't break the build script is to create coverage reports for the fuzzers that compile.
+if [[ $SANITIZER = *coverage* ]]; then
+	compile_go_fuzzer github.com/filecoin-project/lotus/chain/types FuzzMessage fuzz_message gofuzz
+	mkdir fuzzing
+	cp ../fuzzing-lotus/fuzz/fuzz.go fuzzing/
+	compile_go_fuzzer github.com/filecoin-project/lotus/fuzzing FuzzBlockMsg fuzz_block_msg || true
+	compile_go_fuzzer github.com/filecoin-project/lotus/fuzzing FuzzBlockMsgStructural fuzz_block_msg_structural || true
+	compile_go_fuzzer github.com/filecoin-project/lotus/fuzzing FuzzBlockHeader fuzz_block_header || true
+	compile_go_fuzzer github.com/filecoin-project/lotus/fuzzing FuzzNodesForHeight fuzz_nodes_for_height || true
+	exit 0
+fi
 
+compile_go_fuzzer ./chain/types FuzzMessage fuzz_message gofuzz
+
+
+# Fuzzers from fuzzing-lotus
 cd ../fuzzing-lotus/fuzz
-# obsolete modules referenced
 rm -Rf libfuzzer
 go mod init github.com/filecoin-project/fuzzing-lotus/fuzz
 
@@ -28,3 +44,4 @@ compile_go_fuzzer github.com/filecoin-project/fuzzing-lotus/fuzz FuzzBlockMsg fu
 compile_go_fuzzer github.com/filecoin-project/fuzzing-lotus/fuzz FuzzBlockMsgStructural fuzz_block_msg_structural
 compile_go_fuzzer github.com/filecoin-project/fuzzing-lotus/fuzz FuzzBlockHeader fuzz_block_header
 compile_go_fuzzer github.com/filecoin-project/fuzzing-lotus/fuzz FuzzNodesForHeight fuzz_nodes_for_height
+exit 0