diff options
Diffstat (limited to 'src/cmd/compile/internal/gc/main.go')
| -rw-r--r-- | src/cmd/compile/internal/gc/main.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/gc/main.go b/src/cmd/compile/internal/gc/main.go index 2b61564ad8..a1f4767c8f 100644 --- a/src/cmd/compile/internal/gc/main.go +++ b/src/cmd/compile/internal/gc/main.go @@ -44,6 +44,7 @@ var ( Debug_vlog bool Debug_wb int Debug_pctab string + Debug_locationlist int ) // Debug arguments. @@ -69,6 +70,7 @@ var debugtab = []struct { {"wb", "print information about write barriers", &Debug_wb}, {"export", "print export data", &Debug_export}, {"pctab", "print named pc-value table", &Debug_pctab}, + {"locationlists", "print information about DWARF location list creation", &Debug_locationlist}, } const debugHelpHeader = `usage: -d arg[,arg]* and arg is <key>[=<value>] @@ -192,6 +194,7 @@ func Main(archInit func(*Arch)) { flag.BoolVar(&pure_go, "complete", false, "compiling complete package (no C or assembly)") flag.StringVar(&debugstr, "d", "", "print debug information about items in `list`; try -d help") flag.BoolVar(&flagDWARF, "dwarf", true, "generate DWARF symbols") + flag.BoolVar(&Ctxt.Flag_locationlists, "dwarflocationlists", false, "add location lists to DWARF in optimized mode") objabi.Flagcount("e", "no limit on number of errors reported", &Debug['e']) objabi.Flagcount("f", "debug stack frames", &Debug['f']) objabi.Flagcount("h", "halt on error", &Debug['h']) @@ -298,6 +301,9 @@ func Main(archInit func(*Arch)) { if nBackendWorkers > 1 && !concurrentBackendAllowed() { log.Fatalf("cannot use concurrent backend compilation with provided flags; invoked as %v", os.Args) } + if Ctxt.Flag_locationlists && len(Ctxt.Arch.DWARFRegisters) == 0 { + log.Fatalf("location lists requested but register mapping not available on %v", Ctxt.Arch.Name) + } // parse -d argument if debugstr != "" { @@ -383,7 +389,7 @@ func Main(archInit func(*Arch)) { Debug['l'] = 1 - Debug['l'] } - trackScopes = flagDWARF && Debug['l'] == 0 && Debug['N'] != 0 + trackScopes = flagDWARF && ((Debug['l'] == 0 && Debug['N'] != 0) || Ctxt.Flag_locationlists) Widthptr = thearch.LinkArch.PtrSize Widthreg = thearch.LinkArch.RegSize |