1 files changed, 21 insertions, 6 deletions
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
index 9a82cb8e92..390f952feb 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
@@ -175,20 +175,35 @@ func (bu *Binutils) Open(name string, start, limit, offset uint64) (plugin.ObjFi
 func (b *binrep) openMachO(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
 	of, err := macho.Open(name)
 	if err != nil {
-		return nil, fmt.Errorf("Parsing %s: %v", name, err)
+		return nil, fmt.Errorf("error parsing %s: %v", name, err)
 	}
 	defer of.Close()
 
+	// Subtract the load address of the __TEXT section. Usually 0 for shared
+	// libraries or 0x100000000 for executables. You can check this value by
+	// running `objdump -private-headers <file>`.
+
+	textSegment := of.Segment("__TEXT")
+	if textSegment == nil {
+		return nil, fmt.Errorf("could not identify base for %s: no __TEXT segment", name)
+	}
+	if textSegment.Addr > start {
+		return nil, fmt.Errorf("could not identify base for %s: __TEXT segment address (0x%x) > mapping start address (0x%x)",
+			name, textSegment.Addr, start)
+	}
+
+	base := start - textSegment.Addr
+
 	if b.fast || (!b.addr2lineFound && !b.llvmSymbolizerFound) {
-		return &fileNM{file: file{b: b, name: name}}, nil
+		return &fileNM{file: file{b: b, name: name, base: base}}, nil
 	}
-	return &fileAddr2Line{file: file{b: b, name: name}}, nil
+	return &fileAddr2Line{file: file{b: b, name: name, base: base}}, nil
 }
 
 func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
 	ef, err := elf.Open(name)
 	if err != nil {
-		return nil, fmt.Errorf("Parsing %s: %v", name, err)
+		return nil, fmt.Errorf("error parsing %s: %v", name, err)
 	}
 	defer ef.Close()
 
@@ -215,9 +230,9 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 		}
 	}
 
-	base, err := elfexec.GetBase(&ef.FileHeader, nil, stextOffset, start, limit, offset)
+	base, err := elfexec.GetBase(&ef.FileHeader, elfexec.FindTextProgHeader(ef), stextOffset, start, limit, offset)
 	if err != nil {
-		return nil, fmt.Errorf("Could not identify base for %s: %v", name, err)
+		return nil, fmt.Errorf("could not identify base for %s: %v", name, err)
 	}
 
 	buildID := ""