Changeset c4049e6 in mainline for uspace/lib/c/generic/libc.c

Timestamp:

2018-07-05T21:41:20Z (7 years ago)

Author:

Dzejrou <dzejrou@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9283830

Parents:

9396c52

git-author:

Dzejrou <dzejrou@…> (2018-03-15 10:40:53)

git-committer:

Dzejrou <dzejrou@…> (2018-07-05 21:41:20)

Message:

c+cpp: added support for global static constructors destructors

File:

• uspace/lib/c/generic/libc.c (modified) (3 diffs)

uspace/lib/c/generic/libc.c

@@ -61 +61 @@
 #endif
 
+static bool env_setup = false;
 
-static bool env_setup = false;
+/**
+ * Used for C++ constructors/destructors
+ * and the GCC constructor/destructor extension.
+ */
+typedef void (*init_array_entry_t)();
+extern init_array_entry_t __init_array_start[];
+extern init_array_entry_t __init_array_end[];
+typedef void (*fini_array_entry_t)();
+extern fini_array_entry_t __fini_array_start[];
+extern fini_array_entry_t __fini_array_end[];
 
 void __libc_main(void *pcb_ptr)
@@ -115 +125 @@
 
         /*
+         * C++ Static constructor calls.
+         */
+        ptrdiff_t init_array_entries = (__init_array_end - __init_array_start);
+
+        for (int i = init_array_entries - 1; i > 0; --i)
+                __init_array_start[i]();
+
+        /*
          * Run main() and set task return value
          * according the result
@@ -124 +142 @@
 void __libc_exit(int status)
 {
+        /*
+         * GCC extension __attribute__((destructor)),
+         * C++ destructors are added to __cxa_finalize call
+         * when the respective constructor is called.
+         */
+        ptrdiff_t fini_array_entries = (__fini_array_end - __fini_array_start);
+
+        for (int i = 0; i < fini_array_entries; ++i)
+                __fini_array_start[i]();
+
         if (env_setup) {
                 __stdio_done();