Eric Pouech : dbghelp/tests: Test that overlapped module is really unloaded.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e138361f48f137bfa6faee34b9f36cc3228ecdb6
URL:    https://gitlab.winehq.org/wine/wine/-/commit/e138361f48f137bfa6faee34b9f36cc...

Author: Eric Pouech <eric.pouech(a)gmail.com>
Date:   Mon Feb 20 17:27:53 2023 +0100

dbghelp/tests: Test that overlapped module is really unloaded.

(and not just modified in place).

Signed-off-by: Eric Pouech <eric.pouech(a)gmail.com>

---

 dlls/dbghelp/tests/dbghelp.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/dlls/dbghelp/tests/dbghelp.c b/dlls/dbghelp/tests/dbghelp.c
index 83805f3ed10..5a1e6121931 100644
--- a/dlls/dbghelp/tests/dbghelp.c
+++ b/dlls/dbghelp/tests/dbghelp.c
@@ -402,6 +402,9 @@ static void test_modules_overlap(void)
     const char* target1_dll = "c:\\windows\\system32\\kernel32.dll";
     const char* target2_dll = "c:\\windows\\system32\\winmm.dll";
     DWORD imsize = get_module_size(target1_dll);
+    char buffer[512];
+    IMAGEHLP_SYMBOL64* sym = (void*)buffer;
+
     int i, j;
     struct test_module
     {
@@ -448,6 +451,9 @@ static void test_modules_overlap(void)
 
         base = SymLoadModuleEx(dummy, NULL, target1_dll, NULL, base1, 0, NULL, 0);
         ok(base == base1, "SymLoadModuleEx failed: %lu\n", GetLastError());
+        ret = SymAddSymbol(dummy, base1, "winetest_symbol_virtual", base1 + (3 * imsize) / 4, 13, 0);
+        ok(ret, "SymAddSymbol failed: %lu\n", GetLastError());
+
         base = SymLoadModuleEx(dummy, NULL, tests[i].input.name, NULL, tests[i].input.base, tests[i].input.size, NULL, 0);
         if (tests[i].error_code != ~0)
         {
@@ -477,6 +483,23 @@ static void test_modules_overlap(void)
                 ok(!strcasecmp(nth.module.ModuleName, tests[i].outputs[j].name), "Wrong name\n");
             }
         }
+        memset(sym, 0, sizeof(*sym));
+        sym->SizeOfStruct = sizeof(*sym);
+        sym->MaxNameLength = sizeof(buffer) - sizeof(*sym);
+        ret = SymGetSymFromName64(dummy, "winetest_symbol_virtual", sym);
+        if (tests[i].error_code == ERROR_SUCCESS || tests[i].outputs[1].base)
+        {
+            /* first module is not unloaded, so our added symbol should be present, with right attributes */
+            ok(ret, "SymGetSymFromName64 has failed: %lu (%d, %d)\n", GetLastError(), i, j);
+            ok(sym->Address == base1 + (3 * imsize) / 4, "Unexpected size %lu\n", sym->Size);
+            ok(sym->Size == 13, "Unexpected size %lu\n", sym->Size);
+            ok(sym->Flags & SYMFLAG_VIRTUAL, "Unexpected flag %lx\n", sym->Flags);
+        }
+        else
+        {
+            /* the first module is really unloaded, the our added symbol has disappead */
+            ok(!ret, "SymGetSymFromName64 should have failed %lu\n", GetLastError());
+        }
         ret = SymCleanup(dummy);
         ok(ret, "SymCleanup failed: %lu\n", GetLastError());
     }