Merge upstream v2.108.1

CHANGELOG.md

@@ -1,7 +1,7 @@
 # LDC master
 
 #### Big news
-- Frontend, druntime and Phobos are at version [2.108.0+](https://dlang.org/changelog/2.108.0.html). (#4591, #4615, #4619, #4622, #4623)
+- Frontend, druntime and Phobos are at version [2.108.1](https://dlang.org/changelog/2.108.0.html). (#4591, #4615, #4619, #4622, #4623, #4640)
 - Support for [LLVM 18](https://releases.llvm.org/18.1.0/docs/ReleaseNotes.html). The prebuilt packages use v18.1.4 (except for macOS arm64). (#4599, #4605, #4607, #4604, #4628)
 - Android: Switch to native ELF TLS, supported since API level 29 (Android v10), dropping our former custom TLS emulation (requiring a modified LLVM and a legacy ld.bfd linker). The prebuilt packages themselves require Android v10+ (armv7a) / v11+ (aarch64) too, and are built with NDK r26d. Shared druntime and Phobos libraries are now available (`-link-defaultlib-shared`), as on regular Linux. (#4618)
 

CMakeLists.txt

@@ -120,7 +120,7 @@ include(GetLinuxDistribution)
 set(LDC_VERSION "1.38.0") # May be overridden by git hash tag
 set(DMDFE_MAJOR_VERSION   2)
 set(DMDFE_MINOR_VERSION   108)
-set(DMDFE_PATCH_VERSION   0)
+set(DMDFE_PATCH_VERSION   1)
 
 set(DMD_VERSION ${DMDFE_MAJOR_VERSION}.${DMDFE_MINOR_VERSION}.${DMDFE_PATCH_VERSION})
 

dmd/cparse.d

@@ -1922,6 +1922,14 @@ final class CParser(AST) : Parser!AST
                 auto s = cparseFunctionDefinition(id, dt.isTypeFunction(), specifier);
                 typedefTab.setDim(typedefTabLengthSave);
                 symbols = symbolsSave;
+                if (specifier.mod & MOD.x__stdcall)
+                {
+                    // If this function is __stdcall, wrap it in a LinkDeclaration so that
+                    // it's extern(Windows) when imported in D.
+                    auto decls = new AST.Dsymbols(1);
+                    (*decls)[0] = s;
+                    s = new AST.LinkDeclaration(s.loc, LINK.windows, decls);
+                }
                 symbols.push(s);
                 return;
             }
@@ -2074,13 +2082,14 @@ final class CParser(AST) : Parser!AST
                     }
                 }
                 s = applySpecifier(s, specifier);
-                if (level == LVL.local)
+                if (level == LVL.local || (specifier.mod & MOD.x__stdcall))
                 {
-                    // Wrap the declaration in `extern (C) { declaration }`
+                    // Wrap the declaration in `extern (C/Windows) { declaration }`
                     // Necessary for function pointers, but harmless to apply to all.
                     auto decls = new AST.Dsymbols(1);
                     (*decls)[0] = s;
-                    s = new AST.LinkDeclaration(s.loc, linkage, decls);
+                    const lkg = specifier.mod & MOD.x__stdcall ? LINK.windows : linkage;
+                    s = new AST.LinkDeclaration(s.loc, lkg, decls);
                 }
                 symbols.push(s);
             }

dmd/escape.d

@@ -1542,7 +1542,7 @@ private bool inferReturn(FuncDeclaration fd, VarDeclaration v, bool returnScope)
  *      e = expression to be returned by value
  *      er = where to place collected data
  *      live = if @live semantics apply, i.e. expressions `p`, `*p`, `**p`, etc., all return `p`.
-  *     retRefTransition = if `e` is returned through a `return ref scope` function call
+  *     retRefTransition = if `e` is returned through a `return (ref) scope` function call
  */
 public
 void escapeByValue(Expression e, EscapeByResults* er, bool live = false, bool retRefTransition = false)
@@ -1786,7 +1786,7 @@ void escapeByValue(Expression e, EscapeByResults* er, bool live = false, bool re
                                     }
                         }
                         else
-                            escapeByValue(arg, er, live, retRefTransition);
+                            escapeByValue(arg, er, live, true);
                     }
                     else if (psr == ScopeRef.ReturnRef || psr == ScopeRef.ReturnRef_Scope)
                     {
@@ -1941,7 +1941,7 @@ void escapeByValue(Expression e, EscapeByResults* er, bool live = false, bool re
  *      e = expression to be returned by 'ref'
  *      er = where to place collected data
  *      live = if @live semantics apply, i.e. expressions `p`, `*p`, `**p`, etc., all return `p`.
- *      retRefTransition = if `e` is returned through a `return ref scope` function call
+ *      retRefTransition = if `e` is returned through a `return (ref) scope` function call
  */
 private
 void escapeByRef(Expression e, EscapeByResults* er, bool live = false, bool retRefTransition = false)
@@ -2189,14 +2189,18 @@ struct EscapeByResults
     import dmd.root.array: Array;
 
     /**
-     * Whether the variable / expression went through a `return ref scope` function call
+     * Whether the variable / expression went through a `return (ref) scope` function call
      *
      * This is needed for the dip1000 by default transition, since the rules for
      * disambiguating `return scope ref` have changed. Therefore, functions in legacy code
      * can be mistakenly treated as `return ref` making the compiler believe stack variables
      * are being escaped, which is an error even in `@system` code. By keeping track of this
      * information, variables escaped through `return ref` can be treated as a deprecation instead
      * of error, see test/fail_compilation/dip1000_deprecation.d
+     *
+     * Additionally, return scope can be inferred wrongly instead of scope, in which
+     * case the code could give false positives even without @safe or dip1000:
+     * https://issues.dlang.org/show_bug.cgi?id=23657
      */
     private Array!bool refRetRefTransition;
     private Array!bool expRetRefTransition;
@@ -2218,7 +2222,7 @@ struct EscapeByResults
      * Escape variable `v` by reference
      * Params:
      *   v = variable to escape
-     *   retRefTransition = `v` is escaped through a `return ref scope` function call
+     *   retRefTransition = `v` is escaped through a `return (ref) scope` function call
      */
     void pushRef(VarDeclaration v, bool retRefTransition)
     {
@@ -2230,7 +2234,7 @@ struct EscapeByResults
      * Escape a reference to expression `e`
      * Params:
      *   e = expression to escape
-     *   retRefTransition = `e` is escaped through a `return ref scope` function call
+     *   retRefTransition = `e` is escaped through a `return (ref) scope` function call
      */
     void pushExp(Expression e, bool retRefTransition)
     {

dmd/expressionsem.d

@@ -15348,8 +15348,10 @@ Expression resolveLoc(Expression exp, const ref Loc loc, Scope* sc)
     Expression visitSlice(SliceExp exp)
     {
         exp.e1 = exp.e1.resolveLoc(loc, sc);
-        exp.lwr = exp.lwr.resolveLoc(loc, sc);
-        exp.upr = exp.upr.resolveLoc(loc, sc);
+        if (exp.lwr)
+            exp.lwr = exp.lwr.resolveLoc(loc, sc);
+        if (exp.upr)
+            exp.upr = exp.upr.resolveLoc(loc, sc);
 
         return exp;
     }

packaging/dlang-tools_version

@@ -1 +1 @@
-v2.108.0
+v2.108.1

packaging/reggae_version

@@ -1 +1 @@
-9a67d1a1f863c676f30b06ac606b34a792abebdd
+563fb9247a93a352a0999afebe810cbd740c6502

runtime/druntime/src/importc.h

@@ -135,6 +135,7 @@ typedef unsigned long long __uint64_t;
 #define __ptr64
 #define __unaligned
 #define _NO_CRT_STDIO_INLINE 1
+#define _stdcall __stdcall
 
 // This header disables the Windows API Annotations macros
 // Need to include sal.h to get the pragma once to prevent macro redefinition.

tests/dmd/compilable/imports/test24511_c.c

@@ -0,0 +1,17 @@
+typedef void (*CFunctionPointer)();
+typedef void (__stdcall *StdCallFunctionPointer)();
+
+void cFunction()
+{}
+
+void __stdcall stdcallFunction()
+{}
+
+void __stdcall takesCFunctionPointer(CFunctionPointer f)
+{}
+
+void takesStdCallFunctionPointer(StdCallFunctionPointer f)
+{}
+
+typedef void (__stdcall *StdCallFunctionPointerTakingCFunctionPointer)(CFunctionPointer f);
+typedef void (*CFunctionPointerTakingStdCallFunctionPointer)(StdCallFunctionPointer f);

tests/dmd/compilable/returnscope_without_safe.d

@@ -0,0 +1,16 @@
+// Stack pointers are being escaped here, but without
+// @safe and dip1000, it should still be allowed
+// because return scope could have been inferred incorrectly,
+// and it breaks existing code:
+// https://issues.dlang.org/show_bug.cgi?id=23657
+
+int* identity(return scope int* x);
+
+auto identityAuto(int* x) => x;
+
+int* f()
+{
+    int x;
+    return identity(&x);
+    return identityAuto(&x);
+}

tests/dmd/compilable/test22727.c

@@ -6,6 +6,10 @@ __stdcall int foostdcall(int a) { return a; }
 
 int __stdcall foostdcall2(int a) { return a; }
 
+#if _MSC_VER
+int _stdcall foostdcall3(int a) { return a; } // test issue 24509
+#endif
+
 int __stdcall (*fp1)(int a) = &foostdcall;
 
 int (__stdcall *fp2)(int a) = &foostdcall2;

tests/dmd/compilable/test24511.d

@@ -0,0 +1,31 @@
+// (disabled for LDC, would require full triple:) rEQUIRED_ARGS: -os=windows
+// EXTRA_SOURCES: imports/test24511_c.c
+// DISABLED: osx
+// This is disabled on macOS because ld complains about _main being undefined
+// when clang attempts to preprocess the C file.
+
+// LDC: don't bother cross-compiling (incl. -preprocessing), only run on Windows
+// DISABLED: linux freebsd dragonflybsd netbsd openbsd
+
+import test24511_c;
+
+static assert(__traits(getLinkage, CFunctionPointer) == "C");
+static assert(__traits(getLinkage, StdCallFunctionPointer) == "Windows");
+static assert(__traits(getLinkage, cFunction) == "C");
+static assert(__traits(getLinkage, stdcallFunction) == "Windows");
+
+static assert(__traits(getLinkage, takesCFunctionPointer) == "Windows");
+static if (is(typeof(&takesCFunctionPointer) ParamsA == __parameters))
+    static assert(__traits(getLinkage, ParamsA[0]) == "C");
+
+static assert(__traits(getLinkage, takesStdCallFunctionPointer) == "C");
+static if (is(typeof(&takesStdCallFunctionPointer) ParamsB == __parameters))
+    static assert(__traits(getLinkage, ParamsB[0]) == "Windows");
+
+static assert(__traits(getLinkage, StdCallFunctionPointerTakingCFunctionPointer) == "Windows");
+static if (is(typeof(&StdCallFunctionPointerTakingCFunctionPointer) ParamsC == __parameters))
+    static assert(__traits(getLinkage, ParamsC[0]) == "C");
+
+static assert(__traits(getLinkage, CFunctionPointerTakingStdCallFunctionPointer) == "C");
+static if (is(typeof(&CFunctionPointerTakingStdCallFunctionPointer) ParamsD == __parameters))
+    static assert(__traits(getLinkage, ParamsD[0]) == "Windows");

tests/dmd/runnable/imports/issue18919b.d

@@ -248,3 +248,9 @@ void func12(const(char)*[] args = [baseName(__FILE__.ptr),
         printf(" %s", arg);
     printf("\n");
 }
+
+// https://issues.dlang.org/show_bug.cgi?id=24519
+void func13(string file = __FILE__[])
+{
+    printf("%s: %s\n", __FUNCTION__.ptr, file.ptr);
+}

tests/dmd/runnable/issue18919.d

@@ -20,10 +20,13 @@ imports.issue18919b.func9.fp: issue18919b.d:216 imports.issue18919b
 imports.issue18919b.func10: expr1=imports.issue18919b, expr2=imports.issue18919b
 imports.issue18919b.func11: issue18919b.d:233   imports.issue18919b
 imports.issue18919b.func12: issue18919.d issue18919.main void issue18919.main() issue18919
+imports.issue18919b.func13: runnable/issue18919.d
 ---
 */
 import imports.issue18919b;
 
+#line 26
+
 void main()
 {
     func1();
@@ -44,4 +47,5 @@ void main()
     func10();
     func11();
     func12();
+    func13();
 }