Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 436 insertions, 0 deletions

diff --git a/xpcom/reflect/xptcall/md/test/README b/xpcom/reflect/xptcall/md/test/README
new file mode 100644
index 0000000000..04850b2e01
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/README
@@ -0,0 +1,6 @@
+These are just simple test programs in which stripped down versions of the
+XPConnect invoke and stubs code can be built and tested as the code is brought
+up on various platforms. These probrams do not test the param sizing and copying
+functionality of the routines. However, they do supply a place where the lowest
+level assembly language code can be developed and debugged in the simplest of
+contexts before it is moved into the real routines.
\ No newline at end of file
diff --git a/xpcom/reflect/xptcall/md/test/clean.bat b/xpcom/reflect/xptcall/md/test/clean.bat
new file mode 100755
index 0000000000..f320e222c9
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/clean.bat
@@ -0,0 +1,5 @@
+@echo off
+echo deleting intermediate files
+if exist *.obj  del *.obj > NUL
+if exist *.ilk  del *.ilk > NUL
+if exist *.pdb  del *.pdb > NUL
\ No newline at end of file
diff --git a/xpcom/reflect/xptcall/md/test/invoke_test.cpp b/xpcom/reflect/xptcall/md/test/invoke_test.cpp
new file mode 100644
index 0000000000..f23a9ccf15
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/invoke_test.cpp
@@ -0,0 +1,187 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+
+typedef unsigned nsresult;
+typedef unsigned uint32_t;
+typedef unsigned nsXPCVariant;
+
+#if defined(WIN32)
+#  define NS_IMETHOD virtual nsresult __stdcall
+#  define NS_IMETHODIMP nsresult __stdcall
+#else
+#  define NS_IMETHOD virtual nsresult
+#  define NS_IMETHODIMP nsresult
+#endif
+
+class base {
+ public:
+  NS_IMETHOD ignored() = 0;
+};
+
+class foo : public base {
+ public:
+  NS_IMETHOD callme1(int i, int j) = 0;
+  NS_IMETHOD callme2(int i, int j) = 0;
+  NS_IMETHOD callme3(int i, int j) = 0;
+};
+
+class bar : public foo {
+ public:
+  NS_IMETHOD ignored() override;
+  NS_IMETHOD callme1(int i, int j) override;
+  NS_IMETHOD callme2(int i, int j) override;
+  NS_IMETHOD callme3(int i, int j) override;
+};
+
+/*
+class baz : public base {
+public:
+  NS_IMETHOD ignored() override;
+  NS_IMETHOD callme1() override;
+  NS_IMETHOD callme2() override;
+  NS_IMETHOD callme3() override;
+  void setfoo(foo* f) {other = f;}
+
+  foo* other;
+};
+NS_IMETHODIMP baz::ignored(){return 0;}
+*/
+
+NS_IMETHODIMP bar::ignored() { return 0; }
+
+NS_IMETHODIMP bar::callme1(int i, int j) {
+  printf("called bar::callme1 with: %d %d\n", i, j);
+  return 5;
+}
+
+NS_IMETHODIMP bar::callme2(int i, int j) {
+  printf("called bar::callme2 with: %d %d\n", i, j);
+  return 5;
+}
+
+NS_IMETHODIMP bar::callme3(int i, int j) {
+  printf("called bar::callme3 with: %d %d\n", i, j);
+  return 5;
+}
+
+void docall(foo* f, int i, int j) { f->callme1(i, j); }
+
+/***************************************************************************/
+#if defined(WIN32)
+
+static uint32_t __stdcall invoke_count_words(uint32_t paramCount,
+                                             nsXPCVariant* s) {
+  return paramCount;
+}
+
+static void __stdcall invoke_copy_to_stack(uint32_t* d, uint32_t paramCount,
+                                           nsXPCVariant* s) {
+  for (uint32_t i = 0; i < paramCount; i++, d++, s++) {
+    *((uint32_t*)d) = *((uint32_t*)s);
+  }
+}
+
+static nsresult __stdcall DoInvoke(void* that, uint32_t index,
+                                   uint32_t paramCount, nsXPCVariant* params) {
+  __asm {
+        push    params
+        push    paramCount
+        call    invoke_count_words  // stdcall, result in eax
+        shl     eax,2  // *= 4
+        sub     esp,eax  // make space for params
+        mov     edx,esp
+        push    params
+        push    paramCount
+        push    edx
+        call    invoke_copy_to_stack  // stdcall
+        mov     ecx,that  // instance in ecx
+        push    ecx  // push this
+        mov     edx,[ecx]  // vtable in edx
+        mov     eax,index
+        shl     eax,2  // *= 4
+        add     edx,eax
+        call    [edx]  // stdcall, i.e. callee cleans up stack.
+  }
+}
+
+#else
+/***************************************************************************/
+// just Linux_x86 now. Add other later...
+
+static uint32_t invoke_count_words(uint32_t paramCount, nsXPCVariant* s) {
+  return paramCount;
+}
+
+static void invoke_copy_to_stack(uint32_t* d, uint32_t paramCount,
+                                 nsXPCVariant* s) {
+  for (uint32_t i = 0; i < paramCount; i++, d++, s++) {
+    *((uint32_t*)d) = *((uint32_t*)s);
+  }
+}
+
+static nsresult DoInvoke(void* that, uint32_t index, uint32_t paramCount,
+                         nsXPCVariant* params) {
+  uint32_t result;
+  void* fn_count = invoke_count_words;
+  void* fn_copy = invoke_copy_to_stack;
+
+  __asm__ __volatile__(
+      "pushl %4\n\t"
+      "pushl %3\n\t"
+      "movl  %5, %%eax\n\t"
+      "call  *%%eax\n\t" /* count words */
+      "addl  $0x8, %%esp\n\t"
+      "shl   $2, %%eax\n\t"    /* *= 4 */
+      "subl  %%eax, %%esp\n\t" /* make room for params */
+      "movl  %%esp, %%edx\n\t"
+      "pushl %4\n\t"
+      "pushl %3\n\t"
+      "pushl %%edx\n\t"
+      "movl  %6, %%eax\n\t"
+      "call  *%%eax\n\t" /* copy params */
+      "addl  $0xc, %%esp\n\t"
+      "movl  %1, %%ecx\n\t"
+      "pushl %%ecx\n\t"
+      "movl  (%%ecx), %%edx\n\t"
+      "movl  %2, %%eax\n\t" /* function index */
+      "shl   $2, %%eax\n\t" /* *= 4 */
+      "addl  $8, %%eax\n\t" /* += 8 */
+      "addl  %%eax, %%edx\n\t"
+      "call  *(%%edx)\n\t" /* safe to not cleanup esp */
+      "movl  %%eax, %0"
+      : "=g"(result)     /* %0 */
+      : "g"(that),       /* %1 */
+        "g"(index),      /* %2 */
+        "g"(paramCount), /* %3 */
+        "g"(params),     /* %4 */
+        "g"(fn_count),   /* %5 */
+        "g"(fn_copy)     /* %6 */
+      : "ax", "cx", "dx", "memory");
+
+  return result;
+}
+
+#endif
+/***************************************************************************/
+
+int main() {
+  nsXPCVariant params1[2] = {1, 2};
+  nsXPCVariant params2[2] = {2, 4};
+  nsXPCVariant params3[2] = {3, 6};
+
+  foo* a = new bar();
+
+  //  printf("calling via C++...\n");
+  //  docall(a, 12, 24);
+
+  printf("calling via ASM...\n");
+  DoInvoke(a, 1, 2, params1);
+  DoInvoke(a, 2, 2, params2);
+  DoInvoke(a, 3, 2, params3);
+
+  return 0;
+}
diff --git a/xpcom/reflect/xptcall/md/test/mk_invoke.bat b/xpcom/reflect/xptcall/md/test/mk_invoke.bat
new file mode 100755
index 0000000000..10a9be51de
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/mk_invoke.bat
@@ -0,0 +1,9 @@
+@echo off
+@echo deleing old output
+if exist invoke_test.obj del invoke_test.obj > NUL
+if exist invoke_test.ilk del invoke_test.ilk > NUL
+if exist *.pdb           del *.pdb           > NUL
+if exist invoke_test.exe del invoke_test.exe > NUL
+
+@echo building...
+cl /nologo -Zi -DWIN32 invoke_test.cpp
\ No newline at end of file
diff --git a/xpcom/reflect/xptcall/md/test/mk_stub.bat b/xpcom/reflect/xptcall/md/test/mk_stub.bat
new file mode 100755
index 0000000000..f9af17affe
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/mk_stub.bat
@@ -0,0 +1,9 @@
+@echo off
+@echo deleing old output
+if exist stub_test.obj del stub_test.obj > NUL
+if exist stub_test.ilk del stub_test.ilk > NUL
+if exist *.pdb         del *.pdb         > NUL
+if exist stub_test.exe del stub_test.exe > NUL
+
+@echo building...
+cl /nologo -Zi -DWIN32 stub_test.cpp
\ No newline at end of file
diff --git a/xpcom/reflect/xptcall/md/test/moz.build b/xpcom/reflect/xptcall/md/test/moz.build
new file mode 100644
index 0000000000..f31bcf64a3
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/moz.build
@@ -0,0 +1,11 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+SimplePrograms(
+    [
+        "stub_test",
+    ]
+)
diff --git a/xpcom/reflect/xptcall/md/test/stub_test.cpp b/xpcom/reflect/xptcall/md/test/stub_test.cpp
new file mode 100644
index 0000000000..c83eb93ccc
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/test/stub_test.cpp
@@ -0,0 +1,209 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+
+typedef unsigned nsresult;
+typedef unsigned uint32_t;
+typedef unsigned nsXPCVariant;
+
+#if defined(WIN32)
+#  define NS_IMETHOD virtual nsresult __stdcall
+#  define NS_IMETHODIMP nsresult __stdcall
+#else
+#  define NS_IMETHOD virtual nsresult
+#  define NS_IMETHODIMP nsresult
+#endif
+
+class base {
+ public:
+  NS_IMETHOD ignored() = 0;
+};
+
+class foo : public base {
+ public:
+  NS_IMETHOD callme1(int i, int j) = 0;
+  NS_IMETHOD callme2(int i, int j) = 0;
+  NS_IMETHOD callme3(int i, int j) = 0;
+};
+
+class bar : public foo {
+ public:
+  NS_IMETHOD ignored() override;
+  NS_IMETHOD callme1(int i, int j) override;
+  NS_IMETHOD callme2(int i, int j) override;
+  NS_IMETHOD callme3(int i, int j) override;
+};
+
+class baz : public base {
+ public:
+  NS_IMETHOD ignored() override;
+  NS_IMETHOD callme1() override;
+  NS_IMETHOD callme2() override;
+  NS_IMETHOD callme3() override;
+  void setfoo(foo* f) { other = f; }
+
+  foo* other;
+};
+NS_IMETHODIMP baz::ignored() { return 0; }
+
+NS_IMETHODIMP bar::ignored() { return 0; }
+
+NS_IMETHODIMP bar::callme1(int i, int j) {
+  printf("called bar::callme1 with: %d %d\n", i, j);
+  return 15;
+}
+
+NS_IMETHODIMP bar::callme2(int i, int j) {
+  printf("called bar::callme2 with: %d %d\n", i, j);
+  return 25;
+}
+
+NS_IMETHODIMP bar::callme3(int i, int j) {
+  printf("called bar::callme3 with: %d %d\n", i, j);
+  return 35;
+}
+
+void docall(foo* f, int i, int j) { f->callme1(i, j); }
+
+/***************************************************************************/
+#if defined(WIN32)
+
+static int __stdcall PrepareAndDispatch(baz* self, uint32_t methodIndex,
+                                        uint32_t* args,
+                                        uint32_t* stackBytesToPop) {
+  fprintf(stdout, "PrepareAndDispatch (%p, %d, %p)\n", (void*)self, methodIndex,
+          (void*)args);
+  foo* a = self->other;
+  int p1 = (int)*args;
+  int p2 = (int)*(args + 1);
+  int out = 0;
+  switch (methodIndex) {
+    case 1:
+      out = a->callme1(p1, p2);
+      break;
+    case 2:
+      out = a->callme2(p1, p2);
+      break;
+    case 3:
+      out = a->callme3(p1, p2);
+      break;
+  }
+  *stackBytesToPop = 2 * 4;
+  return out;
+}
+
+#  ifndef __GNUC__
+static __declspec(naked) void SharedStub(void) {
+  __asm {
+        push ebp  // set up simple stack frame
+        mov  ebp, esp  // stack has: ebp/vtbl_index/retaddr/this/args
+        push ecx  // make room for a ptr
+        lea  eax, [ebp-4]  // pointer to stackBytesToPop
+        push eax
+        lea  ecx, [ebp+16]  // pointer to args
+        push ecx
+        mov  edx, [ebp+4]  // vtbl_index
+        push edx
+        mov  eax, [ebp+12]  // this
+        push eax
+        call PrepareAndDispatch
+        mov  edx, [ebp+8]  // return address
+        mov  ecx, [ebp-4]  // stackBytesToPop
+        add  ecx, 12  // for this, the index, and ret address
+        mov  esp, ebp
+        pop  ebp
+        add  esp, ecx  // fix up stack pointer
+        jmp  edx  // simulate __stdcall return
+  }
+}
+
+// these macros get expanded (many times) in the file #included below
+#    define STUB_ENTRY(n)                                     \
+      __declspec(naked) nsresult __stdcall baz::callme##n() { \
+        __asm push n __asm jmp SharedStub                     \
+      }
+
+#  else /* __GNUC__ */
+
+#    define STUB_ENTRY(n)                                            \
+      nsresult __stdcall baz::callme##n() {                          \
+        uint32_t *args, stackBytesToPop;                             \
+        int result = 0;                                              \
+        baz* obj;                                                    \
+        __asm__ __volatile__(                                        \
+            "leal   0x0c(%%ebp), %0\n\t" /* args */                  \
+            "movl   0x08(%%ebp), %1\n\t" /* this */                  \
+            : "=r"(args), "=r"(obj));                                \
+        result = PrepareAndDispatch(obj, n, args, &stackBytesToPop); \
+        fprintf(stdout, "stub returning: %d\n", result);             \
+        fprintf(stdout, "bytes to pop:  %d\n", stackBytesToPop);     \
+        return result;                                               \
+      }
+
+#  endif /* ! __GNUC__ */
+
+#else
+/***************************************************************************/
+// just Linux_x86 now. Add other later...
+
+static int PrepareAndDispatch(baz* self, uint32_t methodIndex, uint32_t* args) {
+  foo* a = self->other;
+  int p1 = (int)*args;
+  int p2 = (int)*(args + 1);
+  switch (methodIndex) {
+    case 1:
+      a->callme1(p1, p2);
+      break;
+    case 2:
+      a->callme2(p1, p2);
+      break;
+    case 3:
+      a->callme3(p1, p2);
+      break;
+  }
+  return 1;
+}
+
+#  define STUB_ENTRY(n)                                      \
+    nsresult baz::callme##n() {                              \
+      void* method = PrepareAndDispatch;                     \
+      nsresult result;                                       \
+      __asm__ __volatile__(                                  \
+          "leal   0x0c(%%ebp), %%ecx\n\t" /* args */         \
+          "pushl  %%ecx\n\t"                                 \
+          "pushl  $" #n                                      \
+          "\n\t"                          /* method index */ \
+          "movl   0x08(%%ebp), %%ecx\n\t" /* this */         \
+          "pushl  %%ecx\n\t"                                 \
+          "call   *%%edx" /* PrepareAndDispatch */           \
+          : "=a"(result)  /* %0 */                           \
+          : "d"(method)   /* %1 */                           \
+          : "memory");                                       \
+      return result;                                         \
+    }
+
+#endif
+/***************************************************************************/
+
+STUB_ENTRY(1)
+STUB_ENTRY(2)
+STUB_ENTRY(3)
+
+int main() {
+  foo* a = new bar();
+  baz* b = new baz();
+
+  /* here we make the global 'check for alloc failure' checker happy */
+  if (!a || !b) return 1;
+
+  foo* c = (foo*)b;
+
+  b->setfoo(a);
+  c->callme1(1, 2);
+  c->callme2(2, 4);
+  c->callme3(3, 6);
+
+  return 0;
+}