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- added access to thread state info from the signal handler

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SVN=124404
This commit is contained in:
Robert Griesemer 2008-06-24 16:48:54 -07:00
parent 2987c8434b
commit 206daeabda
1 changed files with 105 additions and 15 deletions
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120
src/runtime/rt1_amd64_darwin.c
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@ -5,6 +5,99 @@
#include "runtime.h"
#include "signals.h"
typedef uint64 __uint64_t;
// From /usr/include/mach/i386/_structs.h
#define _STRUCT_X86_THREAD_STATE64 struct __darwin_x86_thread_state64
_STRUCT_X86_THREAD_STATE64
{
__uint64_t __rax;
__uint64_t __rbx;
__uint64_t __rcx;
__uint64_t __rdx;
__uint64_t __rdi;
__uint64_t __rsi;
__uint64_t __rbp;
__uint64_t __rsp;
__uint64_t __r8;
__uint64_t __r9;
__uint64_t __r10;
__uint64_t __r11;
__uint64_t __r12;
__uint64_t __r13;
__uint64_t __r14;
__uint64_t __r15;
__uint64_t __rip;
__uint64_t __rflags;
__uint64_t __cs;
__uint64_t __fs;
__uint64_t __gs;
};
void
print_thread_state(_STRUCT_X86_THREAD_STATE64* ss)
{
prints("\nrax 0x"); sys_printpointer((void*)ss->__rax);
prints("\nrbx 0x"); sys_printpointer((void*)ss->__rbx);
prints("\nrcx 0x"); sys_printpointer((void*)ss->__rcx);
prints("\nrdx 0x"); sys_printpointer((void*)ss->__rdx);
prints("\nrdi 0x"); sys_printpointer((void*)ss->__rdi);
prints("\nrsi 0x"); sys_printpointer((void*)ss->__rsi);
prints("\nrbp 0x"); sys_printpointer((void*)ss->__rbp);
prints("\nrsp 0x"); sys_printpointer((void*)ss->__rsp);
prints("\nr8 0x"); sys_printpointer((void*)ss->__r8 );
prints("\nr9 0x"); sys_printpointer((void*)ss->__r9 );
prints("\nr10 0x"); sys_printpointer((void*)ss->__r10);
prints("\nr11 0x"); sys_printpointer((void*)ss->__r11);
prints("\nr12 0x"); sys_printpointer((void*)ss->__r12);
prints("\nr13 0x"); sys_printpointer((void*)ss->__r13);
prints("\nr14 0x"); sys_printpointer((void*)ss->__r14);
prints("\nr15 0x"); sys_printpointer((void*)ss->__r15);
prints("\nrip 0x"); sys_printpointer((void*)ss->__rip);
prints("\nrflags 0x"); sys_printpointer((void*)ss->__rflags);
prints("\ncs 0x"); sys_printpointer((void*)ss->__cs);
prints("\nfs 0x"); sys_printpointer((void*)ss->__fs);
prints("\ngs 0x"); sys_printpointer((void*)ss->__gs);
prints("\n");
}
/* Code generated via: g++ -m64 signals.cc && a.out */
static void *adr_at(void *ptr, int32 offs) {
return (void *)((uint8 *)ptr + offs);
}
static void *ptr_at(void *ptr, int32 offs) {
return *(void **)((uint8 *)ptr + offs);
}
typedef void ucontext_t;
typedef void _STRUCT_MCONTEXT64;
typedef void _STRUCT_X86_EXCEPTION_STATE64;
typedef void _STRUCT_X86_FLOAT_STATE64;
static _STRUCT_MCONTEXT64 *get_uc_mcontext(ucontext_t *ptr) {
return (_STRUCT_MCONTEXT64 *)ptr_at(ptr, 48);
}
static _STRUCT_X86_EXCEPTION_STATE64 *get___es(_STRUCT_MCONTEXT64 *ptr) {
return (_STRUCT_X86_EXCEPTION_STATE64 *)adr_at(ptr, 0);
}
static _STRUCT_X86_THREAD_STATE64 *get___ss(_STRUCT_MCONTEXT64 *ptr) {
return (_STRUCT_X86_THREAD_STATE64 *)adr_at(ptr, 16);
}
static _STRUCT_X86_FLOAT_STATE64 *get___fs(_STRUCT_MCONTEXT64 *ptr) {
return (_STRUCT_X86_FLOAT_STATE64 *)adr_at(ptr, 184);
}
/* End of generated code */
/*
* This assembler routine takes the args from registers, puts them on the stack,
* and calls sighandler().
@ -37,10 +130,8 @@ typedef struct sigaction {
} sigaction;
void
sighandler(int32 sig, siginfo* info, void** context) {
int32 i;
void *pc, *sp;
sighandler(int32 sig, siginfo *info, void *context)
{
if(sig < 0 || sig >= NSIG){
prints("Signal ");
sys_printint(sig);
@ -48,17 +139,16 @@ sighandler(int32 sig, siginfo* info, void** context) {
prints(sigtab[sig].name);
}
prints("\nFaulting address: 0x");
sys_printpointer(info->si_addr);
prints("\nPC: 0x");
pc = ((void**)((&sig)+1))[22];
sys_printpointer(pc);
prints("\nSP: 0x");
sp = ((void**)((&sig)+1))[13];
sys_printpointer(sp);
prints("\n");
if (pc != 0 && sp != 0)
traceback(pc, sp); /* empirically discovered locations */
_STRUCT_MCONTEXT64 *uc_mcontext = get_uc_mcontext(context);
_STRUCT_X86_THREAD_STATE64 *ss = get___ss(uc_mcontext);
prints("\nFaulting address: 0x"); sys_printpointer(info->si_addr);
prints("\npc: 0x"); sys_printpointer((void *)ss->__rip);
prints("\n\n");
traceback((void *)ss->__rip, (void *)ss->__rsp);
print_thread_state(ss);
sys_exit(2);
}