Fix path lookup logic on Windows.

Fixes #370.

_fixtures/locationsUpperCase.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("test")
+}

appveyor.yml

@@ -2,7 +2,7 @@ version: '{build}'
 os: Windows Server 2012 R2
 clone_folder: c:\gopath\src\github.com\derekparker\delve
 environment:
-  GOPATH: c:\gopath
+  GOPATH: C:\gopath
 install:
   - ps: |
       # Install MinGW.

proc/proc.go

@@ -161,7 +161,7 @@ func (dbp *Process) LoadInformation(path string) error {
 }
 
 // FindFileLocation returns the PC for a given file:line.
-// Assumes that `file` is normailzed to lower case and '/' on Windows.
+// Assumes that `file` is normailzed to lower case and '/' on Windows. 
 func (dbp *Process) FindFileLocation(fileName string, lineno int) (uint64, error) {
 	pc, _, err := dbp.goSymTable.LineToPC(fileName, lineno)
 	if err != nil {

proc/test/support.go

@@ -8,7 +8,6 @@ import (
 	"os/exec"
 	"path/filepath"
 	"runtime"
-	"strings"
 	"testing"
 )
 
@@ -65,9 +64,6 @@ func BuildFixture(name string) Fixture {
 
 	source, _ := filepath.Abs(path)
 	source = filepath.ToSlash(source)
-	if runtime.GOOS == "windows" {
-		source = strings.ToLower(source)
-	}
 
 	Fixtures[name] = Fixture{Name: name, Path: tmpfile, Source: source}
 	return Fixtures[name]

service/debugger/debugger.go

@@ -5,7 +5,10 @@ import (
 	"errors"
 	"fmt"
 	"log"
+	"path/filepath"
 	"regexp"
+	"runtime"
+	"strings"
 
 	"github.com/derekparker/delve/proc"
 	"github.com/derekparker/delve/service/api"
@@ -149,7 +152,18 @@ func (d *Debugger) CreateBreakpoint(requestedBp *api.Breakpoint) (*api.Breakpoin
 	)
 	switch {
 	case len(requestedBp.File) > 0:
-		addr, err = d.process.FindFileLocation(normalizePath(requestedBp.File), requestedBp.Line)
+		fileName := requestedBp.File
+		if runtime.GOOS == "windows" {
+			// Accept fileName which is case-insensitive and slash-insensitive match
+			fileNameNormalized := strings.ToLower(filepath.ToSlash(fileName))
+			for symFile := range d.process.Sources() {
+				if fileNameNormalized == strings.ToLower(filepath.ToSlash(symFile)) {
+					fileName = symFile
+					break
+				}
+			}
+		}
+		addr, err = d.process.FindFileLocation(fileName, requestedBp.Line)
 	case len(requestedBp.FunctionName) > 0:
 		if requestedBp.Line >= 0 {
 			addr, err = d.process.FindFunctionLocation(requestedBp.FunctionName, false, requestedBp.Line)

service/debugger/locations.go

@@ -50,13 +50,6 @@ type FuncLocationSpec struct {
 	BaseName              string
 }
 
-func normalizePath(path string) string {
-	if runtime.GOOS != "windows" {
-		return path
-	}
-	return strings.ToLower(filepath.ToSlash(path))
-}
-
 func parseLocationSpec(locStr string) (LocationSpec, error) {
 	rest := locStr
 
@@ -291,8 +284,11 @@ func (loc *NormalLocationSpec) FileMatch(path string) bool {
 }
 
 func partialPathMatch(expr, path string) bool {
-	expr = normalizePath(expr)
+	if runtime.GOOS == "windows" {
-	path = normalizePath(path)
+		// Accept `expr` which is case-insensitive and slash-insensitive match to `path`
+		expr = strings.ToLower(filepath.ToSlash(expr))
+		path = strings.ToLower(filepath.ToSlash(path))
+	}
 	if len(expr) < len(path)-1 {
 		return strings.HasSuffix(path, expr) && (path[len(path)-len(expr)-1] == '/')
 	} else {

service/test/integration_test.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 	"runtime"
 	"strconv"
+	"strings"
 	"testing"
 
 	protest "github.com/derekparker/delve/proc/test"
@@ -616,6 +617,44 @@ func TestClientServer_FindLocations(t *testing.T) {
 		stacktracemeAddr := findLocationHelper(t, c, "stacktraceprog.go:4", false, 1, 0)[0]
 		findLocationHelper(t, c, "main.stacktraceme", false, 1, stacktracemeAddr)
 	})
+
+	withTestClient("locationsUpperCase", t, func(c service.Client) {
+		// Upper case
+		findLocationHelper(t, c, "locationsUpperCase.go:6", false, 1, 0)
+
+		// Fully qualified path
+		path := protest.Fixtures["locationsUpperCase"].Source
+		findLocationHelper(t, c, path+":6", false, 1, 0)
+		bp, err := c.CreateBreakpoint(&api.Breakpoint{File: path, Line: 6})
+		if err != nil {
+			t.Fatalf("Could not set breakpoint in %s: %v\n", path, err)
+		}
+		c.ClearBreakpoint(bp.ID)
+
+		//  Allow `/` or `\` on Windows
+		if runtime.GOOS == "windows" {
+			findLocationHelper(t, c, filepath.FromSlash(path)+":6", false, 1, 0)
+			bp, err = c.CreateBreakpoint(&api.Breakpoint{File: filepath.FromSlash(path), Line: 6})
+			if err != nil {
+				t.Fatalf("Could not set breakpoint in %s: %v\n", filepath.FromSlash(path), err)
+			}
+			c.ClearBreakpoint(bp.ID)
+		}
+
+		// Case-insensitive on Windows, case-sensitive otherwise
+		shouldWrongCaseBeError := true
+		numExpectedMatches := 0
+		if runtime.GOOS == "windows" {
+			shouldWrongCaseBeError = false
+			numExpectedMatches = 1
+		}
+		findLocationHelper(t, c, strings.ToLower(path)+":6", shouldWrongCaseBeError, numExpectedMatches, 0)
+		bp, err = c.CreateBreakpoint(&api.Breakpoint{File: strings.ToLower(path), Line: 6})
+		if (err == nil) == shouldWrongCaseBeError {
+			t.Fatalf("Could not set breakpoint in %s: %v\n", strings.ToLower(path), err)
+		}
+		c.ClearBreakpoint(bp.ID)
+	})
 }
 
 func TestClientServer_FindLocationsAddr(t *testing.T) {