sdlprocdump: add option to print debug stream

test/CMakeLists.txt

@@ -46,7 +46,7 @@ if(WIN32 AND NOT WINDOWS_STORE)
     set_property(TARGET sdlprocdump PROPERTY C_STANDARD "90")
     SDL_AddCommonCompilerFlags(sdlprocdump)
     if(SDLTEST_PROCDUMP)
-        set(CMAKE_TEST_LAUNCHER "$<TARGET_FILE:sdlprocdump>")
+        set(CMAKE_TEST_LAUNCHER "$<TARGET_FILE:sdlprocdump>;--")
     else()
         set_property(TARGET sdlprocdump PROPERTY EXCLUDE_FROM_ALL "1")
     endif()

test/win32/sdlprocdump.c

@@ -1,14 +1,21 @@
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
 #include <windows.h>
 #include <dbghelp.h>
 
 #include <inttypes.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #define DUMP_FOLDER "minidumps"
 #define APPNAME "SDLPROCDUMP"
 
+#define PRODCUMP_MIN(A,B) (((A) < (B)) ? (A) : (B))
+
 #if defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) ||defined( __i386) || defined(_M_IX86)
 #define SDLPROCDUMP_CPU_X86 1
 #elif defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
@@ -463,8 +470,13 @@ static void GetMSCExceptionName(HANDLE hProcess, ULONG_PTR *parameters, DWORD co
 #undef CHECKED_ReadProcessMemory
 }
 
+static void log_usage(const char *argv0) {
+    fprintf(stderr, "Usage: %s [--help] [--debug-stream] [--] PROGRAM [ARG1 [ARG2 [ARG3 ... ]]]\n", argv0);
+}
+
 int main(int argc, char *argv[]) {
     int i;
+    int cmd_i = 1;
     size_t command_line_len = 0;
     char *command_line;
     STARTUPINFOA startup_info;
@@ -473,13 +485,30 @@ int main(int argc, char *argv[]) {
     BOOL debugger_present;
     DWORD exit_code;
     DWORD creation_flags;
+    BOOL log_debug_stream = FALSE;
+
+    for (i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "--") == 0) {
+            cmd_i = i + 1;
+            break;
+        } else if (strcmp(argv[i], "--debug-stream") == 0) {
+            log_debug_stream = TRUE;
+            continue;
+        } else if (strcmp(argv[i], "--help") == 0) {
+            log_usage(argv[0]);
+            return 0;
+        } else {
+            cmd_i = i;
+            break;
+        }
+    }
 
-    if (argc < 2) {
-        fprintf(stderr, "Usage: %s PROGRAM [ARG1 [ARG2 [ARG3 ... ]]]\n", argv[0]);
+    if (cmd_i >= argc) {
+        log_usage(argv[0]);
         return 1;
     }
 
-    for (i = 1; i < argc; i++) {
+    for (i = cmd_i; i < argc; i++) {
         command_line_len += strlen(argv[i]) + 1;
     }
     command_line = malloc(command_line_len + 1);
@@ -488,7 +517,7 @@ int main(int argc, char *argv[]) {
         return 1;
     }
     command_line[0] = '\0';
-    for (i = 1; i < argc; i++) {
+    for (i = cmd_i; i < argc; i++) {
         strcat_s(command_line, command_line_len, argv[i]);
         if (i != argc - 1) {
             strcat_s(command_line, command_line_len, " ");
@@ -504,7 +533,7 @@ int main(int argc, char *argv[]) {
         creation_flags |= DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS;
     }
     success = CreateProcessA(
-        argv[1],                /* LPCSTR                lpApplicationName, */
+        argv[cmd_i],                /* LPCSTR                lpApplicationName, */
         command_line,           /* LPSTR                 lpCommandLine, */
         NULL,                   /* LPSECURITY_ATTRIBUTES lpProcessAttributes, */
         NULL,                   /* LPSECURITY_ATTRIBUTES lpThreadAttributes, */
@@ -516,7 +545,7 @@ int main(int argc, char *argv[]) {
         &process_information);  /* LPPROCESS_INFORMATION lpProcessInformation */
 
     if (!success) {
-        printf_windows_message("Failed to start application");
+        printf_windows_message("Failed to start application \"%s\"", argv[cmd_i]);
         return 1;
     }
 
@@ -533,6 +562,40 @@ int main(int argc, char *argv[]) {
                 return 1;
             }
             switch (event.dwDebugEventCode) {
+            case OUTPUT_DEBUG_STRING_EVENT:
+            {
+                if (log_debug_stream) {
+                    size_t bytes_read = 0;
+                    union {
+                        char char_buffer[512];
+                        WCHAR wchar_buffer[256];
+                    } buffer;
+                    if (ReadProcessMemory(process_information.hProcess, event.u.DebugString.lpDebugStringData, buffer.char_buffer, PRODCUMP_MIN(sizeof(buffer), event.u.DebugString.nDebugStringLength), &bytes_read) && bytes_read) {
+                        if (event.u.DebugString.fUnicode) {
+                            size_t len = bytes_read / 2;
+                            buffer.wchar_buffer[255] = '\0';
+                            while (len > 0 && (buffer.wchar_buffer[len - 1] == '\0' || buffer.wchar_buffer[len - 1] == '\n' || buffer.wchar_buffer[len - 1] == '\r')) {
+                                buffer.wchar_buffer[len - 1] = '\0';
+                                len -= 1;
+                            }
+                            if (len > 0) {
+                                printf("[" APPNAME "] (debug) %S\n", buffer.wchar_buffer);
+                            }
+                        } else {
+                            size_t len = bytes_read;
+                            buffer.char_buffer[511] = '\0';
+                            while (len > 0 && (buffer.char_buffer[len - 1] == '\0' || buffer.char_buffer[len - 1] == '\n' || buffer.char_buffer[len - 1] == '\r')) {
+                                buffer.char_buffer[len - 1] = '\0';
+                                len -= 1;
+                            }
+                            if (len > 0) {
+                                printf("[" APPNAME "] (debug) %s\n", buffer.char_buffer);
+                            }
+                        }
+                    }
+                }
+                break;
+            }
             case EXCEPTION_DEBUG_EVENT:
             {
                 const BOOL cxx_exception = IsCXXException(event.u.Exception.ExceptionRecord.ExceptionCode);