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Make native mvnd only require glibc 2.12 on ubuntu 22.04 (#825, fixes #823)

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The modern glibc from 2.34 had two breaking changes: move all api in lib{pthread,dl,rt}.so into libc.so, new static start up code breaking the runtime compatibility for old glibc (<2.34). See https://developers.redhat.com/articles/2021/12/17/why-glibc-234-removed-libpthread for more info.

This commit has 3 changes to overcome these changes:
- override gcc path to redefine glibc symbols on the fly in the generated .o by graalvm when linking
- provide a dynamic startup code to support both old and modern runtime glibc
- add needed dynamic libraries: lib{pthread,rt,dl}.so.
This commit is contained in:
James Z.M. Gao
2023-03-23 16:02:38 +08:00
committed by GitHub
parent 76f8139281
commit da20df03cd
8 changed files with 222 additions and 27 deletions
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67
client/src/main/resources/glibc/dynamic-libc-start.c Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/* ref:
* https://elixir.bootlin.com/glibc/glibc-2.37.9000/source/csu/libc-start.c
* https://elixir.bootlin.com/glibc/glibc-2.33.9000/source/csu/elf-init.c#L68
*/
#define _GNU_SOURCE
#include <dlfcn.h>
#include <stdint.h>
__asm__(".symver dlsym,dlsym@GLIBC_2.2.5");
__asm__(".symver dlvsym,dlvsym@GLIBC_2.2.5");
/* These magic symbols are provided by the linker. */
extern void (*__init_array_start[])(int, char **, char **) __attribute__ ((visibility ("hidden")));
extern void (*__init_array_end[])(int, char **, char **) __attribute__ ((visibility ("hidden")));
extern void _init(void);
/* These functions are passed to __libc_start_main by the startup code.
These get statically linked into each program. */
static void
__libc_csu_init(const int argc, char **const argv, char **const envp)
{
_init();
const __auto_type size = __init_array_end - __init_array_start;
for (__auto_type i = 0; i < size; ++i)
(*__init_array_start[i])(argc, argv, envp);
}
int
__dynamic_libc_start_main(int (*const main)(int, char **, char **),
const int argc,
char ** const argv,
__typeof(&__libc_csu_init) init,
void (*const fini)(void),
void (*const rtld_fini)(void),
void (*const stack_end))
{
_Static_assert(sizeof(uintptr_t) >= sizeof(void*), "uintptr_t should contain a object pointer");
_Static_assert(sizeof(uintptr_t) <= sizeof(&__dynamic_libc_start_main), "function pointer should contain an uintptr_t");
const __auto_type __libc_start_main = (__typeof(&__dynamic_libc_start_main))(uintptr_t)dlsym(RTLD_DEFAULT, "__libc_start_main");
if (!dlvsym(RTLD_DEFAULT, "__libc_start_main", "GLIBC_2.34")) {
init = &__libc_csu_init; // old runtime glibc, ver < 2.34
}
return __libc_start_main(main, argc, argv, init, fini, rtld_fini, stack_end);
}