ad7181c692f2

mac 10.13.6
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGILL (0x4) at pc=0x000000011014b598, pid=1181, tid=8451
#
# JRE version: OpenJDK Runtime Environment (9.0) (slowdebug build 9-internal+0-adhoc.huanghaoxing.openjdk)
# Java VM: OpenJDK 64-Bit Server VM (slowdebug 9-internal+0-adhoc.huanghaoxing.openjdk, mixed mode, tiered, compressed oops, serial gc, bsd-amd64)
# Problematic frame:
# V [libjvm.dylib+0xd4b598] PerfData::~PerfData()+0x8
#
# No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/huanghaoxing/source/openjdk/make/hs_err_pid1181.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

mac 10.13.x编译openjdk8

由于 mac high sierra 系统有较大的变动,所以专门写一篇用mac high sierra 来编译 openjdk8 的博客. 准备阶段 mac 系统版本 10...

candyleer

12041 19 52

ad7181c692f2

@wenj1997 还有3G内存就不管了？

操作系统实验：Lab2 物理内存管理

清华大学操作系统Lab2实验报告课程主页：http://os.cs.tsinghua.edu.cn/oscourse/OS2018spring实验指导书：https://ch...

wenj1997

5021 3 2

ad7181c692f2

page_init 为什么只用到实际物理内存的0-KMEMSIZE(0X38000000) , 这个内存不到1G，1G-4G用到哪里了

static void
page_init(void) {
struct e820map *memmap = (struct e820map *)(0x8000 + KERNBASE);
uint64_t maxpa = 0;

cprintf("e820map:\n");
int i;
for (i = 0; i < memmap->nr_map; i ++) {
uint64_t begin = memmap->map[i].addr, end = begin + memmap->map[i].size;
cprintf(" memory: %08llx, [%08llx, %08llx], type = %d.\n",
memmap->map[i].size, begin, end - 1, memmap->map[i].type);
if (memmap->map[i].type == E820_ARM) {
if (maxpa < end && begin < KMEMSIZE) {
maxpa = end;
}
}
}
if (maxpa > KMEMSIZE) {
maxpa = KMEMSIZE;
}

extern char end[];

npage = maxpa / PGSIZE;
pages = (struct Page *)ROUNDUP((void *)end, PGSIZE);

for (i = 0; i < npage; i ++) {
SetPageReserved(pages + i);
}

uintptr_t freemem = PADDR((uintptr_t)pages + sizeof(struct Page) * npage);

for (i = 0; i < memmap->nr_map; i ++) {
uint64_t begin = memmap->map[i].addr, end = begin + memmap->map[i].size;
if (memmap->map[i].type == E820_ARM) {
if (begin < freemem) {
begin = freemem;
}
if (end > KMEMSIZE) {
end = KMEMSIZE;
}
if (begin < end) {
begin = ROUNDUP(begin, PGSIZE);
end = ROUNDDOWN(end, PGSIZE);
if (begin < end) {
init_memmap(pa2page(begin), (end - begin) / PGSIZE);
}
}
}
}
}

操作系统实验：Lab2 物理内存管理

清华大学操作系统Lab2实验报告课程主页：http://os.cs.tsinghua.edu.cn/oscourse/OS2018spring实验指导书：https://ch...

wenj1997

5021 3 2