From eaf5ac08e5caa21a3e42a2924fb121435a340763 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Fri, 9 Oct 2020 13:31:32 +0300
Subject: [PATCH] Build lldb-mi

Building this tool requires having a full LLVM build available;
either by installing without LLVM_INSTALL_TOOLCHAIN_ONLY (and not
stripping the llvm installation yet) or by pointing it at the
LLVM build directory instead. The latter works better for our
normal build flows.
---
 .dockerignore        |   1 +
 .gitignore           |   1 +
 Dockerfile           |   3 +-
 Dockerfile.cross     |   4 ++
 Dockerfile.dev       |   4 ++
 build-all.sh         |   1 +
 build-cross-tools.sh |   1 +
 build-lldb-mi.sh     | 118 +++++++++++++++++++++++++++++++++++++++++++
 strip-llvm.sh        |   2 +-
 9 files changed, 133 insertions(+), 2 deletions(-)
 create mode 100755 build-lldb-mi.sh

diff --git a/.dockerignore b/.dockerignore
index ff519e3..efa0786 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,6 +2,7 @@
 llvm-project
 mingw-w64
 libssp
+lldb-mi
 make-*
 **/*.exe
 **/*.dll
diff --git a/.gitignore b/.gitignore
index 4efc857..69c6256 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /llvm-project
 /mingw-w64
 /libssp
+/lldb-mi
 /make-*
diff --git a/Dockerfile b/Dockerfile
index 28daee8..d30797c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -45,9 +45,10 @@ ARG TOOLCHAIN_ARCHS="i686 x86_64 armv7 aarch64"
 ARG DEFAULT_CRT=ucrt
 
 # Build everything that uses the llvm monorepo. We need to build the mingw runtime before the compiler-rt/libunwind/libcxxabi/libcxx runtimes.
-COPY build-llvm.sh strip-llvm.sh install-wrappers.sh build-mingw-w64.sh build-mingw-w64-tools.sh build-compiler-rt.sh build-mingw-w64-libraries.sh build-libcxx.sh build-openmp.sh ./
+COPY build-llvm.sh build-lldb-mi.sh strip-llvm.sh install-wrappers.sh build-mingw-w64.sh build-mingw-w64-tools.sh build-compiler-rt.sh build-mingw-w64-libraries.sh build-libcxx.sh build-openmp.sh ./
 COPY wrappers/*.sh wrappers/*.c wrappers/*.h ./wrappers/
 RUN ./build-llvm.sh $TOOLCHAIN_PREFIX && \
+    ./build-lldb-mi.sh $TOOLCHAIN_PREFIX && \
     ./strip-llvm.sh $TOOLCHAIN_PREFIX && \
     ./install-wrappers.sh $TOOLCHAIN_PREFIX && \
     ./build-mingw-w64.sh $TOOLCHAIN_PREFIX --with-default-msvcrt=$DEFAULT_CRT && \
diff --git a/Dockerfile.cross b/Dockerfile.cross
index 9405173..84071e1 100644
--- a/Dockerfile.cross
+++ b/Dockerfile.cross
@@ -20,6 +20,10 @@ ARG FULL_LLVM
 
 COPY build-llvm.sh .
 RUN ./build-llvm.sh $CROSS_TOOLCHAIN_PREFIX --host=$HOST
+
+COPY build-lldb-mi.sh .
+RUN ./build-lldb-mi.sh $CROSS_TOOLCHAIN_PREFIX --host=$HOST
+
 COPY strip-llvm.sh .
 RUN ./strip-llvm.sh $CROSS_TOOLCHAIN_PREFIX --host=$HOST
 
diff --git a/Dockerfile.dev b/Dockerfile.dev
index a34aa3f..a615a52 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -46,6 +46,10 @@ ARG FULL_LLVM
 COPY build-llvm.sh ./
 RUN ./build-llvm.sh $TOOLCHAIN_PREFIX
 
+# Build LLDB-MI
+COPY build-lldb-mi.sh ./
+RUN ./build-lldb-mi.sh $TOOLCHAIN_PREFIX
+
 # Strip the LLVM install output immediately. (This doesn't reduce the
 # total docker image size as long as it is in a separate RUN layer though,
 # but reduces build times if tweaking the contents of strip-llvm.sh.)
diff --git a/build-all.sh b/build-all.sh
index c1ce818..0a9c63a 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -30,6 +30,7 @@ for dep in git curl cmake; do
 done
 
 ./build-llvm.sh $PREFIX
+./build-lldb-mi.sh $PREFIX
 ./install-wrappers.sh $PREFIX
 ./build-mingw-w64.sh $PREFIX
 ./build-mingw-w64-tools.sh $PREFIX
diff --git a/build-cross-tools.sh b/build-cross-tools.sh
index c73fe87..f5ef76c 100755
--- a/build-cross-tools.sh
+++ b/build-cross-tools.sh
@@ -28,6 +28,7 @@ export PATH="$NATIVE/bin:$PATH"
 HOST=$CROSS_ARCH-w64-mingw32
 
 ./build-llvm.sh $PREFIX --host=$HOST
+./build-lldb-mi.sh $PREFIX --host=$HOST
 ./strip-llvm.sh $PREFIX --host=$HOST
 ./build-mingw-w64-tools.sh $PREFIX --skip-include-triplet-prefix --host=$HOST
 ./install-wrappers.sh $PREFIX --host=$HOST
diff --git a/build-lldb-mi.sh b/build-lldb-mi.sh
new file mode 100755
index 0000000..e738587
--- /dev/null
+++ b/build-lldb-mi.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+#
+# Copyright (c) 2020 Martin Storsjo
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+set -e
+
+: ${LLDB_MI_VERSION:=89945aa323c82125ee5d5b841988db17fc357dd6}
+BUILDDIR=build
+unset HOST
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+    --host=*)
+        HOST="${1#*=}"
+        ;;
+    *)
+        PREFIX="$1"
+        ;;
+    esac
+    shift
+done
+if [ -z "$PREFIX" ]; then
+    echo $0 [--host=<triple>] dest
+    exit 1
+fi
+
+mkdir -p "$PREFIX"
+PREFIX="$(cd "$PREFIX" && pwd)"
+
+if [ ! -d lldb-mi ]; then
+    git clone https://github.com/lldb-tools/lldb-mi.git
+    CHECKOUT=1
+fi
+
+if [ -n "$SYNC" ] || [ -n "$CHECKOUT" ]; then
+    cd lldb-mi
+    [ -z "$SYNC" ] || git fetch
+    git checkout $LLDB_MI_VERSION
+    cd ..
+fi
+
+if [ -n "$(which ninja)" ]; then
+    CMAKE_GENERATOR="Ninja"
+    NINJA=1
+    BUILDCMD=ninja
+else
+    : ${CORES:=$(nproc 2>/dev/null)}
+    : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
+    : ${CORES:=4}
+
+    case $(uname) in
+    MINGW*)
+        CMAKE_GENERATOR="MSYS Makefiles"
+        ;;
+    *)
+        ;;
+    esac
+    BUILDCMD=make
+fi
+
+export LLVM_DIR="$PREFIX"
+
+# Try to find/guess the builddir under the llvm buildtree next by.
+# If LLVM was built without LLVM_INSTALL_TOOLCHAIN_ONLY, and the LLVM
+# installation directory hasn't been stripped, we should point the build there.
+# But as this isn't necessarily the case, point to the LLVM build directory
+# instead (which hopefully hasn't been removed yet).
+LLVM_SRC="$(pwd)/llvm-project/llvm"
+if [ -d "$LLVM_SRC" ]; then
+    SUFFIX=${HOST+-}$HOST
+    for base in build build-asserts; do
+        if [ -d "$LLVM_SRC/$base$SUFFIX" ]; then
+            export LLVM_DIR="$LLVM_SRC/$base$SUFFIX"
+            break
+        fi
+    done
+fi
+
+if [ -n "$HOST" ]; then
+    BUILDDIR=$BUILDDIR-$HOST
+
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_SYSTEM_NAME=Windows"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CROSSCOMPILING=TRUE"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_C_COMPILER=$HOST-gcc"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CXX_COMPILER=$HOST-g++"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_RC_COMPILER=$HOST-windres"
+
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_FIND_ROOT_PATH=$LLVM_DIR"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY"
+fi
+
+cd lldb-mi
+
+[ -z "$CLEAN" ] || rm -rf $BUILDDIR
+mkdir -p $BUILDDIR
+cd $BUILDDIR
+cmake \
+    ${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \
+    -DCMAKE_INSTALL_PREFIX="$PREFIX" \
+    -DCMAKE_BUILD_TYPE=Release \
+    $CMAKEFLAGS \
+    ..
+
+$BUILDCMD ${CORES+-j$CORES} install/strip
diff --git a/strip-llvm.sh b/strip-llvm.sh
index e2ff275..3df8e18 100755
--- a/strip-llvm.sh
+++ b/strip-llvm.sh
@@ -84,7 +84,7 @@ for i in bugpoint c-index-test clang-* diagtool dsymutil git-clang-format hmapto
             rm $i
         fi
         ;;
-    lldb|lldb-server|lldb-argdumper|lldb-instr)
+    lldb|lldb-server|lldb-argdumper|lldb-instr|lldb-mi)
         ;;
     *)
         if [ -f $i ]; then