> `jhsdb jstack --mixed` with coredump cannot resolve function symbol which has > `.cold` attribute. > > > ----------------- 120485 ----------------- > "Thread-0" #24 prio=5 tid=0x00007f50dc1aa7c0 nid=120485 waiting on condition > [0x00007f50c0d1a000] > java.lang.Thread.State: TIMED_WAITING (sleeping) > JavaThread state: _thread_blocked > 0x00007f50e4710735 __GI_abort + 0x8b > 0x00007f50e1e01f33 ???????? > > > 0x7f50e1e01f33 was `os::abort(bool, void const*, void const*) [clone .cold]` > and I could see it in GDB. However it has `.cold` suffix, it means the code > has been relocated as ["cold" > function](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute). > In GDB, we can see the code in another area from function body as following: > > > (gdb) disas 0x7f50e1e01f2e, 0x7f50e1e01f34 > Dump of assembler code from 0x7f50e1e01f2e to 0x7f50e1e01f34: > 0x00007f50e1e01f2e <_ZN2os5abortEbPKvS1_.cold+0>: call 0x7f50e1e01010 > <abort@plt> > => 0x00007f50e1e01f33: nop > End of assembler dump. > > > libsaproc.so checks address range to resolve symbol whether the address is in > between `start` and `start + size - 1`. As you can see in assembler dump, the > code in `.cold` section is `call` instruction, thus IP points next `nop`, > thus we should allow address range between `start` and `start + size`. > > After this PR, you can see the right symbol as following: > > > ----------------- 120485 ----------------- > "Thread-0" #24 prio=5 tid=0x00007f50dc1aa7c0 nid=120485 waiting on condition > [0x00007f50c0d1a000] > java.lang.Thread.State: TIMED_WAITING (sleeping) > JavaThread state: _thread_blocked > 0x00007f50e4710735 __GI_abort + 0x8b > 0x00007f50e1e01f33 os::abort(bool, void const*, void const*) [clone > .cold] + 0x5
Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision: Clarify comment about RIP-1 fallback handling ------------- Changes: - all: https://git.openjdk.org/jdk/pull/27846/files - new: https://git.openjdk.org/jdk/pull/27846/files/3492a833..335d0408 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=27846&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27846&range=01-02 Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/27846.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27846/head:pull/27846 PR: https://git.openjdk.org/jdk/pull/27846
