Merge pull request #886 from iovisor/llvm_40_fixes

Fixes for LLVM 4.0 and python3

src/cc/bpf_module.cc

@@ -345,7 +345,8 @@ int BPFModule::load_includes(const string &text) {
 
 int BPFModule::annotate() {
   for (auto fn = mod_->getFunctionList().begin(); fn != mod_->getFunctionList().end(); ++fn)
-    fn->addFnAttr(Attribute::AlwaysInline);
+    if (!fn->hasFnAttribute(Attribute::NoInline))
+      fn->addFnAttr(Attribute::AlwaysInline);
 
   // separate module to hold the reader functions
   auto m = make_unique<Module>("sscanf", *ctx_);

src/cc/export/helpers.h

@@ -284,7 +284,7 @@ static inline void bpf_store_dword(void *skb, u64 off, u64 val) {
 #define MASK(_n) ((_n) < 64 ? (1ull << (_n)) - 1 : ((u64)-1LL))
 #define MASK128(_n) ((_n) < 128 ? ((unsigned __int128)1 << (_n)) - 1 : ((unsigned __int128)-1))
 
-static unsigned int bpf_log2(unsigned int v)
+static inline unsigned int bpf_log2(unsigned int v)
 {
   unsigned int r;
   unsigned int shift;
@@ -297,7 +297,7 @@ static unsigned int bpf_log2(unsigned int v)
   return r;
 }
 
-static unsigned int bpf_log2l(unsigned long v)
+static inline unsigned int bpf_log2l(unsigned long v)
 {
   unsigned int hi = v >> 32;
   if (hi)

src/cc/frontends/clang/loader.cc

@@ -137,6 +137,8 @@ int ClangLoader::parse(unique_ptr<llvm::Module> *mod, unique_ptr<vector<TableDes
                                    "-Wno-deprecated-declarations",
                                    "-Wno-gnu-variable-sized-type-not-at-end",
                                    "-fno-color-diagnostics",
+                                   "-fno-unwind-tables",
+                                   "-fno-asynchronous-unwind-tables",
                                    "-x", "c", "-c", abs_file.c_str()});
 
   KBuildHelper kbuild_helper(kdir, kernel_path_info.first);

tools/execsnoop.py

@@ -197,9 +197,9 @@ def print_event(cpu, data, size):
             if args.timestamp:
                 print("%-8.3f" % (time.time() - start_ts), end="")
             ppid = get_ppid(event.pid)
-            print("%-16s %-6s %-6s %3s %s" % (event.comm, event.pid,
+            print("%-16s %-6s %-6s %3s %s" % (event.comm.decode(), event.pid,
                     ppid if ppid > 0 else "?", event.retval,
-                    ' '.join(argv[event.pid])))
+                    b' '.join(argv[event.pid]).decode()))
 
         del(argv[event.pid])