Rename __do_global_ctors to __mingw_do_global_ctors and __do_global_dtors
to __mingw_do_global_dtors to make it explicit that these two functions
are internal for mingw-w64 runtime and not supposed to be used or called by
anything else.
Explicitly call __mingw_do_global_ctors() in mingw-w64 startup sequence
instead of the __main() function, and make gcc's __main() function
completely empty, as it is not needed anymore. Function __main() is
inserted into every function main() by gcc, so the symbol for function
__main() has to exist in mingw-w64 runtime even if it does nothing.
Move atexit(__mingw_do_global_dtors) call from __mingw_do_global_ctors() to
mingw-w64 shutdown sequence. For exe builds use _crt_atexit() registration
and for dll builds call __mingw_do_global_dtors() function from the
_CRT_INIT(DLL_PROCESS_DETACH) function.
---
mingw-w64-crt/Makefile.am | 2 +-
mingw-w64-crt/crt/crtdll.c | 7 +++--
mingw-w64-crt/crt/crtexe.c | 7 +++--
.../crt/{gccmain.c => gcc_ctors_dtors.c} | 30 ++++---------------
mingw-w64-crt/crt/gcc_main.c | 22 ++++++++++++++
5 files changed, 38 insertions(+), 30 deletions(-)
rename mingw-w64-crt/crt/{gccmain.c => gcc_ctors_dtors.c} (56%)
create mode 100644 mingw-w64-crt/crt/gcc_main.c
diff --git a/mingw-w64-crt/Makefile.am b/mingw-w64-crt/Makefile.am
index a296bd804779..2665013e2155 100644
--- a/mingw-w64-crt/Makefile.am
+++ b/mingw-w64-crt/Makefile.am
@@ -114,7 +114,7 @@ src_libntoskrnl=libsrc/memcmp.c
src_libdloadhelper=libsrc/dloadhelper.c misc/delay-f.c
src_libmingw32=include/oscalls.h include/internal.h include/sect_attribs.h \
- crt/crtexewin.c crt/dll_argv.c crt/gccmain.c crt/natstart.c
crt/pseudo-reloc-list.c crt/wildcard.c \
+ crt/crtexewin.c crt/dll_argv.c crt/gcc_main.c crt/gcc_ctors_dtors.c
crt/natstart.c crt/pseudo-reloc-list.c crt/wildcard.c \
crt/charmax.c crt/ucrtexewin.c crt/dllargv.c crt/_newmode.c
crt/tlssup.c crt/xncommod.c \
crt/cinitexe.c crt/merr.c crt/pesect.c crt/udllargc.c
crt/xthdloc.c \
crt/mingw_custom.c crt/mingw_helpers.c \
diff --git a/mingw-w64-crt/crt/crtdll.c b/mingw-w64-crt/crt/crtdll.c
index 6bee08f596ab..5b96a9df981e 100644
--- a/mingw-w64-crt/crt/crtdll.c
+++ b/mingw-w64-crt/crt/crtdll.c
@@ -21,7 +21,8 @@
#if defined(__x86_64__) && !defined(__SEH__)
extern int __mingw_init_ehandler (void);
#endif
-extern void __main ();
+extern void __mingw_do_global_ctors (void);
+extern void __mingw_do_global_dtors (void);
extern void _pei386_runtime_relocator (void);
extern _PIFV __xi_a[];
extern _PIFV __xi_z[];
@@ -83,7 +84,7 @@ WINBOOL WINAPI _CRT_INIT (HANDLE hDllHandle, DWORD dwReason,
LPVOID lpreserved)
if (ret != 0)
goto i__leave;
_initterm (__xc_a, __xc_z);
- __main ();
+ __mingw_do_global_ctors ();
__native_startup_state = __initialized;
}
@@ -124,6 +125,8 @@ i__leave:
else
{
_execute_onexit_table(&atexit_table);
+ __mingw_do_global_dtors ();
+
__native_startup_state = __uninitialized;
}
if (! nested)
diff --git a/mingw-w64-crt/crt/crtexe.c b/mingw-w64-crt/crt/crtexe.c
index 94bad6aaff27..e5f9254c005f 100644
--- a/mingw-w64-crt/crt/crtexe.c
+++ b/mingw-w64-crt/crt/crtexe.c
@@ -43,8 +43,10 @@ extern const PIMAGE_TLS_CALLBACK __dyn_tls_init_callback;
extern int __mingw_app_type;
+extern void __mingw_do_global_ctors (void);
+extern void __mingw_do_global_dtors (void);
+
static int argc;
-extern void __main(void);
static _TCHAR **argv;
static _TCHAR **envp;
@@ -216,7 +218,8 @@ __tmainCRTStartup (void)
_amsg_exit (8); /* _RT_SPACEARG */
_initterm (__xc_a, __xc_z);
- __main (); /* C++ initialization. */
+ __mingw_do_global_ctors ();
+ _crt_atexit (__mingw_do_global_dtors);
__native_startup_state = __initialized;
}
diff --git a/mingw-w64-crt/crt/gccmain.c b/mingw-w64-crt/crt/gcc_ctors_dtors.c
similarity index 56%
rename from mingw-w64-crt/crt/gccmain.c
rename to mingw-w64-crt/crt/gcc_ctors_dtors.c
index 13ef04fdba20..f470cd7de792 100644
--- a/mingw-w64-crt/crt/gccmain.c
+++ b/mingw-w64-crt/crt/gcc_ctors_dtors.c
@@ -4,20 +4,15 @@
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
-#include <windows.h>
-#include <stdlib.h>
-#include <setjmp.h>
-
typedef void (*func_ptr) (void);
extern func_ptr __CTOR_LIST__[];
extern func_ptr __DTOR_LIST__[];
-void __do_global_dtors (void);
-void __do_global_ctors (void);
-void __main (void);
+void __mingw_do_global_dtors (void);
+void __mingw_do_global_ctors (void);
void
-__do_global_dtors (void)
+__mingw_do_global_dtors (void)
{
static func_ptr *p = __DTOR_LIST__ + 1;
@@ -29,9 +24,9 @@ __do_global_dtors (void)
}
void
-__do_global_ctors (void)
+__mingw_do_global_ctors (void)
{
- unsigned long nptrs = (unsigned long) (ptrdiff_t) __CTOR_LIST__[0];
+ unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
unsigned long i;
if (nptrs == (unsigned long) -1)
@@ -43,19 +38,4 @@ __do_global_ctors (void)
{
__CTOR_LIST__[i] ();
}
-
- atexit (__do_global_dtors);
-}
-
-static int initialized = 0;
-
-__attribute__((used)) /* required for gcc -flto -Ofast */
-void
-__main (void)
-{
- if (!initialized)
- {
- initialized = 1;
- __do_global_ctors ();
- }
}
diff --git a/mingw-w64-crt/crt/gcc_main.c b/mingw-w64-crt/crt/gcc_main.c
new file mode 100644
index 000000000000..367b8de7ef98
--- /dev/null
+++ b/mingw-w64-crt/crt/gcc_main.c
@@ -0,0 +1,22 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+void __main (void);
+
+__attribute__((used)) /* required for gcc -flto -Ofast */
+void
+__main (void)
+{
+ /* gcc during compilation of function named main() inserts at the beginning
+ * of the execution a call to the function __main(). gcc expects that the
+ * function __main() will execute all global C++ constructors which are
+ * emitted by gcc itself. mingw-w64 runtime executes all gcc's global C++
+ * constructors in mingw-w64 startup code (in crtdll.c and crtexe.c) before
+ * executing function main. So the __main() function should do nothing as
+ * when this function is called, all global C++ constructors were already
+ * executed.
+ */
+}
--
2.20.1
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