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coredump: Support threads

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Change-Id: Id75ade6c87b15abcff5d772d90f77950376a32c1
Refs: #1219
This commit is contained in:
Masamichi Takagi
2019-02-19 17:08:39 +09:00
parent 12aef0b578
commit 11ef2f8092
33 changed files with 1438 additions and 76 deletions
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7
arch/x86_64/kernel/coredump.c
View File

@ -18,8 +18,6 @@ void arch_fill_prstatus(struct elf_prstatus64 *prstatus, struct thread *thread,
short int pr_cursig;
a8_uint64_t pr_sigpend;
a8_uint64_t pr_sighold;
pid_t pr_pid;
pid_t pr_ppid;
pid_t pr_pgrp;
pid_t pr_sid;
struct prstatus64_timeval pr_utime;
@ -28,6 +26,11 @@ void arch_fill_prstatus(struct elf_prstatus64 *prstatus, struct thread *thread,
struct prstatus64_timeval pr_cstime;
*/
prstatus->pr_pid = thread->tid;
if (thread->proc->parent) {
prstatus->pr_ppid = thread->proc->parent->pid;
}
prstatus->pr_reg[0] = _r15;
prstatus->pr_reg[1] = _r14;
prstatus->pr_reg[2] = _r13;

45
arch/x86_64/kernel/syscall.c
View File

@ -573,7 +573,7 @@ long ptrace_write_regset(struct thread *thread, long type, struct iovec *iov)
return rc;
}
extern void coredump(struct thread *thread, void *regs);
extern int coredump(struct thread *thread, void *regs, int sig);
void ptrace_report_signal(struct thread *thread, int sig)
{
@ -741,6 +741,7 @@ do_signal(unsigned long rc, void *regs0, struct thread *thread, struct sig_pendi
struct mcs_rwlock_node_irqsave lock;
struct mcs_rwlock_node_irqsave mcs_rw_node;
int restart = 0;
int ret;
for(w = pending->sigmask.__val[0], sig = 0; w; sig++, w >>= 1);
dkprintf("do_signal(): tid=%d, pid=%d, sig=%d\n", thread->tid, proc->pid, sig);
@ -1006,9 +1007,31 @@ do_signal(unsigned long rc, void *regs0, struct thread *thread, struct sig_pendi
case SIGXCPU:
case SIGXFSZ:
core:
dkprintf("do_signal,default,core,sig=%d\n", sig);
coredump(thread, regs);
coredumped = 0x80;
thread->coredump_regs =
kmalloc(sizeof(struct x86_user_context),
IHK_MC_AP_NOWAIT);
if (!thread->coredump_regs) {
kprintf("%s: Out of memory\n", __func__);
goto skip;
}
memcpy(thread->coredump_regs, regs,
sizeof(struct x86_user_context));
ret = coredump(thread, regs, sig);
switch (ret) {
case -EBUSY:
kprintf("%s: INFO: coredump not performed, try ulimit -c <non-zero>\n",
__func__);
break;
case 0:
coredumped = 0x80;
break;
default:
kprintf("%s: ERROR: coredump failed (%d)\n",
__func__, ret);
break;
}
skip:
terminate(0, sig | coredumped);
break;
case SIGCHLD:
@ -1609,7 +1632,7 @@ set_signal(int sig, void *regs0, siginfo_t *info)
}
if ((__sigmask(sig) & thread->sigmask.__val[0])) {
coredump(thread, regs0);
coredump(thread, regs0, sig);
terminate(0, sig | 0x80);
}
do_kill(thread, thread->proc->pid, thread->tid, sig, info, 0);
@ -1763,10 +1786,20 @@ out:
SYSCALL_DECLARE(clone)
{
return do_fork((int)ihk_mc_syscall_arg0(ctx), ihk_mc_syscall_arg1(ctx),
struct process *proc = cpu_local_var(current)->proc;
struct mcs_rwlock_node_irqsave lock_dump;
unsigned long ret;
/* mutex coredump */
mcs_rwlock_reader_lock(&proc->coredump_lock, &lock_dump);
ret = do_fork((int)ihk_mc_syscall_arg0(ctx), ihk_mc_syscall_arg1(ctx),
ihk_mc_syscall_arg2(ctx), ihk_mc_syscall_arg3(ctx),
ihk_mc_syscall_arg4(ctx), ihk_mc_syscall_pc(ctx),
ihk_mc_syscall_sp(ctx));
mcs_rwlock_reader_unlock(&proc->coredump_lock, &lock_dump);
return ret;
}
SYSCALL_DECLARE(fork)