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debugUnix.c
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debugUnix.c
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#include "pharovm/pharo.h"
#include <stdarg.h>
#if __linux__
#define __USE_GNU
#define _GNU_SOURCE
#include <ucontext.h>
#endif
#if __APPLE__
#define _XOPEN_SOURCE
#include <ucontext.h>
#endif
#if __FreeBSD__
#include <ucontext.h>
#endif
#ifdef HAVE_EXECINFO_H
# include <execinfo.h>
#endif
#include <signal.h>
#include <string.h>
#define BACKTRACE_DEPTH 64
extern void dumpPrimTraceLog(void);
void ifValidWriteBackStackPointersSaveTo(void *theCFP, void *theCSP, char **savedFPP, char **savedSPP);
void printAllStacks();
void printCallStack();
char* GetAttributeString(int idx);
void reportStackState(const char *msg, char *date, int printAll, ucontext_t *uap, FILE* output);
char * getVersionInfo(int verbose);
void getCrashDumpFilenameInto(char *buf);
void dumpPrimTraceLog();
void doReport(char* fault, ucontext_t *uap){
time_t now = time(NULL);
char ctimebuf[32];
char crashdumpFileName[PATH_MAX+1];
FILE *crashDumpFile;
ctime_r(&now,ctimebuf);
//This is awful but replace the stdout to print all the messages in the file.
crashdumpFileName[0] = 0;
getCrashDumpFilenameInto(crashdumpFileName);
crashDumpFile = fopen(crashdumpFileName, "a+");
if (crashDumpFile != NULL) {
vm_setVMOutputStream(crashDumpFile);
reportStackState(fault, ctimebuf, 1, uap, crashDumpFile);
}
vm_setVMOutputStream(stderr);
if (crashDumpFile != NULL) {
fclose(crashDumpFile);
}
reportStackState(fault, ctimebuf, 1, uap, stderr);
}
void sigusr1(int sig, siginfo_t *info, ucontext_t *uap)
{
int saved_errno = errno;
doReport("SIGUSR1", uap);
errno = saved_errno;
}
static int inFault = 0;
void sigsegv(int sig, siginfo_t *info, ucontext_t *uap)
{
char *fault = strsignal(sig);
doReport(fault, uap);
exit(-1);
}
void terminateHandler(int sig, siginfo_t *info, ucontext_t *uap)
{
char *fault = strsignal(sig);
logWarn("VM terminated with signal %s", fault);
if(getLogLevel() >= LOG_DEBUG) {
doReport(fault, uap);
}
/* See exit code guideline: https://tldp.org/LDP/abs/html/exitcodes.html */
int exit_code = 128 + sig;
logWarn("Exiting with error code %d", exit_code);
exit(exit_code);
}
/*
* Useful if we want to filter which are the threads to monitor
*/
EXPORT(void) registerCurrentThreadToHandleExceptions(){
}
EXPORT(void) installErrorHandlers(){
struct sigaction sigusr1_handler_action, sigsegv_handler_action, term_handler_action, sigpipe_handler_action;
sigsegv_handler_action.sa_sigaction = (void (*)(int, siginfo_t *, void *))sigsegv;
sigsegv_handler_action.sa_flags = SA_NODEFER | SA_SIGINFO;
sigemptyset(&sigsegv_handler_action.sa_mask);
#ifdef SIGEMT
sigaction(SIGEMT, &sigsegv_handler_action, 0);
#endif
sigaction(SIGFPE, &sigsegv_handler_action, 0);
sigaction(SIGTRAP, &sigsegv_handler_action, 0);
sigaction(SIGQUIT, &sigsegv_handler_action, 0);
sigaction(SIGBUS, &sigsegv_handler_action, 0);
sigaction(SIGILL, &sigsegv_handler_action, 0);
sigaction(SIGSEGV, &sigsegv_handler_action, 0);
sigaction(SIGSYS, &sigsegv_handler_action, 0);
sigaction(SIGALRM, &sigsegv_handler_action, 0);
sigaction(SIGABRT, &sigsegv_handler_action, 0);
term_handler_action.sa_sigaction = (void (*)(int, siginfo_t *, void *))terminateHandler;
term_handler_action.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGHUP, &term_handler_action, 0);
sigaction(SIGTERM, &term_handler_action, 0);
sigaction(SIGKILL, &term_handler_action, 0);
//Ignore all broken pipe signals. They will be reported as normal errors by send() and write()
//Otherwise SIGPIPE kill the process without allowing any recovery or treatment
sigpipe_handler_action.sa_sigaction = (void (*)(int, siginfo_t *, void *))SIG_IGN;
sigpipe_handler_action.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGPIPE, &sigpipe_handler_action, 0);
sigusr1_handler_action.sa_sigaction = (void (*)(int, siginfo_t *, void *))sigusr1;
sigusr1_handler_action.sa_flags = SA_NODEFER | SA_SIGINFO;
sigemptyset(&sigusr1_handler_action.sa_mask);
sigaction(SIGUSR1, &sigusr1_handler_action, 0);
}
void * printRegisterState(ucontext_t *uap, FILE* output)
{
#if __linux__ && __i386__
greg_t *regs = uap->uc_mcontext.gregs;
fprintf_impl(output,
"\teax 0x%08x ebx 0x%08x ecx 0x%08x edx 0x%08x\n"
"\tedi 0x%08x esi 0x%08x ebp 0x%08x esp 0x%08x\n"
"\teip 0x%08x\n",
regs[REG_EAX], regs[REG_EBX], regs[REG_ECX], regs[REG_EDX],
regs[REG_EDI], regs[REG_EDI], regs[REG_EBP], regs[REG_ESP],
regs[REG_EIP]);
return (void *)regs[REG_EIP];
#elif __APPLE__ && __DARWIN_UNIX03 && __i386__
_STRUCT_X86_THREAD_STATE32 *regs = &uap->uc_mcontext->__ss;
fprintf_impl(output,
"\teax 0x%08x ebx 0x%08x ecx 0x%08x edx 0x%08x\n"
"\tedi 0x%08x esi 0x%08x ebp 0x%08x esp 0x%08x\n"
"\teip 0x%08x\n",
regs->__eax, regs->__ebx, regs->__ecx, regs->__edx,
regs->__edi, regs->__edi, regs->__ebp, regs->__esp,
regs->__eip);
return (void *)(regs->__eip);
#elif __APPLE__ && __i386__
_STRUCT_X86_THREAD_STATE32 *regs = &uap->uc_mcontext->ss;
fprintf_impl(output,
"\teax 0x%08x ebx 0x%08x ecx 0x%08x edx 0x%08x\n"
"\tedi 0x%08x esi 0x%08x ebp 0x%08x esp 0x%08x\n"
"\teip 0x%08x\n",
regs->eax, regs->ebx, regs->ecx, regs->edx,
regs->edi, regs->edi, regs->ebp, regs->esp,
regs->eip);
return (void *)(regs->eip);
#elif __APPLE__ && __x86_64__
_STRUCT_X86_THREAD_STATE64 *regs = &uap->uc_mcontext->__ss;
fprintf_impl(output,
"\trax 0x%016llx rbx 0x%016llx rcx 0x%016llx rdx 0x%016llx\n"
"\trdi 0x%016llx rsi 0x%016llx rbp 0x%016llx rsp 0x%016llx\n"
"\tr8 0x%016llx r9 0x%016llx r10 0x%016llx r11 0x%016llx\n"
"\tr12 0x%016llx r13 0x%016llx r14 0x%016llx r15 0x%016llx\n"
"\trip 0x%016llx\n",
regs->__rax, regs->__rbx, regs->__rcx, regs->__rdx,
regs->__rdi, regs->__rdi, regs->__rbp, regs->__rsp,
regs->__r8 , regs->__r9 , regs->__r10, regs->__r11,
regs->__r12, regs->__r13, regs->__r14, regs->__r15,
regs->__rip);
return (void *)(regs->__rip);
# elif __APPLE__ && (defined(__arm__) || defined(__arm32__))
_STRUCT_ARM_THREAD_STATE *regs = &uap->uc_mcontext->ss;
fprintf_impl(output,
"\t r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
"\t r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n"
"\t r8 0x%08x r9 0x%08x r10 0x%08x fp 0x%08x\n"
"\t ip 0x%08x sp 0x%08x lr 0x%08x pc 0x%08x\n"
"\tcpsr 0x%08x\n",
regs->r[0],regs->r[1],regs->r[2],regs->r[3],
regs->r[4],regs->r[5],regs->r[6],regs->r[7],
regs->r[8],regs->r[9],regs->r[10],regs->r[11],
regs->r[12], regs->sp, regs->lr, regs->pc, regs->cpsr);
return (void *)(regs->pc);
# elif __APPLE__ && defined(__aarch64__)
_STRUCT_ARM_THREAD_STATE64 *regs = &uap->uc_mcontext->__ss;
fprintf_impl(output,
"\t x00 0x%016llx x01 0x%016llx x02 0x%016llx x03 0x%016llx\n"
"\t x04 0x%016llx x05 0x%016llx x06 0x%016llx x07 0x%016llx\n"
"\t x08 0x%016llx x09 0x%016llx x10 0x%016llx x11 0x%016llx\n"
"\t x12 0x%016llx x13 0x%016llx x14 0x%016llx x15 0x%016llx\n"
"\t x16 0x%016llx x17 0x%016llx x18 0x%016llx x19 0x%016llx\n"
"\t x20 0x%016llx x21 0x%016llx x22 0x%016llx x23 0x%016llx\n"
"\t x24 0x%016llx x25 0x%016llx x26 0x%016llx x27 0x%016llx\n"
"\t x28 0x%016llx FP 0x%016llx LR 0x%016llx SP 0x%016llx\n"
"\t PC 0x%016llx STATE 0x%016llx\n",
regs->__x[0],
regs->__x[1],
regs->__x[2],
regs->__x[3],
regs->__x[4],
regs->__x[5],
regs->__x[6],
regs->__x[7],
regs->__x[8],
regs->__x[9],
regs->__x[10],
regs->__x[11],
regs->__x[12],
regs->__x[13],
regs->__x[14],
regs->__x[15],
regs->__x[16],
regs->__x[17],
regs->__x[18],
regs->__x[19],
regs->__x[20],
regs->__x[21],
regs->__x[22],
regs->__x[23],
regs->__x[24],
regs->__x[25],
regs->__x[26],
regs->__x[27],
regs->__x[28],
regs->__fp,
regs->__lr,
regs->__sp,
regs->__pc,
(__uint64_t)regs->__cpsr);
return (void*)(regs->__pc);
#elif __FreeBSD__ && __i386__
struct mcontext *regs = &uap->uc_mcontext;
fprintf_impl(output,
"\teax 0x%08x ebx 0x%08x ecx 0x%08x edx 0x%08x\n"
"\tedi 0x%08x esi 0x%08x ebp 0x%08x esp 0x%08x\n"
"\teip 0x%08x\n",
regs->mc_eax, regs->mc_ebx, regs->mc_ecx, regs->mc_edx,
regs->mc_edi, regs->mc_edi, regs->mc_ebp, regs->mc_esp,
regs->mc_eip);
return regs->mc_eip;
#elif __linux__ && __x86_64__
greg_t *regs = uap->uc_mcontext.gregs;
fprintf_impl(output,
"\trax 0x%08llx rbx 0x%08llx rcx 0x%08llx rdx 0x%08llx\n"
"\trdi 0x%08llx rsi 0x%08llx rbp 0x%08llx rsp 0x%08llx\n"
"\tr8 0x%08llx r9 0x%08llx r10 0x%08llx r11 0x%08llx\n"
"\tr12 0x%08llx r13 0x%08llx r14 0x%08llx r15 0x%08llx\n"
"\trip 0x%08llx\n",
regs[REG_RAX], regs[REG_RBX], regs[REG_RCX], regs[REG_RDX],
regs[REG_RDI], regs[REG_RDI], regs[REG_RBP], regs[REG_RSP],
regs[REG_R8 ], regs[REG_R9 ], regs[REG_R10], regs[REG_R11],
regs[REG_R12], regs[REG_R13], regs[REG_R14], regs[REG_R15],
regs[REG_RIP]);
return (void*)regs[REG_RIP];
# elif __linux__ && (defined(__arm__) || defined(__arm32__) || defined(ARM32))
struct sigcontext *regs = &uap->uc_mcontext;
fprintf_impl(output,
"\t r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
"\t r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n"
"\t r8 0x%08x r9 0x%08x r10 0x%08x fp 0x%08x\n"
"\t ip 0x%08x sp 0x%08x lr 0x%08x pc 0x%08x\n",
regs->arm_r0,regs->arm_r1,regs->arm_r2,regs->arm_r3,
regs->arm_r4,regs->arm_r5,regs->arm_r6,regs->arm_r7,
regs->arm_r8,regs->arm_r9,regs->arm_r10,regs->arm_fp,
regs->arm_ip, regs->arm_sp, regs->arm_lr, regs->arm_pc);
return regs->arm_pc;
# elif __linux__ && defined(__aarch64__)
fprintf_impl(output,
"\t x00 0x%016llx x01 0x%016llx x02 0x%016llx x03 0x%016llx\n"
"\t x04 0x%016llx x05 0x%016llx x06 0x%016llx x07 0x%016llx\n"
"\t x08 0x%016llx x09 0x%016llx x10 0x%016llx x11 0x%016llx\n"
"\t x12 0x%016llx x13 0x%016llx x14 0x%016llx x15 0x%016llx\n"
"\t x16 0x%016llx x17 0x%016llx x18 0x%016llx x19 0x%016llx\n"
"\t x20 0x%016llx x21 0x%016llx x22 0x%016llx x23 0x%016llx\n"
"\t x24 0x%016llx x25 0x%016llx x26 0x%016llx x27 0x%016llx\n"
"\t x28 0x%016llx FP 0x%016llx LR 0x%016llx SP 0x%016llx\n"
"\t PC 0x%016llx STATE 0x%016llx\n",
uap->uc_mcontext.regs[0],
uap->uc_mcontext.regs[1],
uap->uc_mcontext.regs[2],
uap->uc_mcontext.regs[3],
uap->uc_mcontext.regs[4],
uap->uc_mcontext.regs[5],
uap->uc_mcontext.regs[6],
uap->uc_mcontext.regs[7],
uap->uc_mcontext.regs[8],
uap->uc_mcontext.regs[9],
uap->uc_mcontext.regs[10],
uap->uc_mcontext.regs[11],
uap->uc_mcontext.regs[12],
uap->uc_mcontext.regs[13],
uap->uc_mcontext.regs[14],
uap->uc_mcontext.regs[15],
uap->uc_mcontext.regs[16],
uap->uc_mcontext.regs[17],
uap->uc_mcontext.regs[18],
uap->uc_mcontext.regs[19],
uap->uc_mcontext.regs[20],
uap->uc_mcontext.regs[21],
uap->uc_mcontext.regs[22],
uap->uc_mcontext.regs[23],
uap->uc_mcontext.regs[24],
uap->uc_mcontext.regs[25],
uap->uc_mcontext.regs[26],
uap->uc_mcontext.regs[27],
uap->uc_mcontext.regs[28],
uap->uc_mcontext.regs[29],
uap->uc_mcontext.regs[30],
uap->uc_mcontext.sp,
uap->uc_mcontext.pc,
uap->uc_mcontext.pstate);
return (void*)uap->uc_mcontext.pc;
#else
fprintf_impl(output,"don't know how to derive register state from a ucontext_t on this platform\n");
return 0;
#endif
}
static int runningInVMThread(){
/*
IF THE VM is compiled without support for PTHREAD we assume that we are in the VM thread
*/
#ifdef PHARO_VM_IN_WORKER_THREAD
return ioOSThreadsEqual(ioCurrentOSThread(),getVMOSThread());
#else
return 1;
#endif
}
static sqInt printingStack = false;
void reportStackState(const char *msg, char *date, int printAll, ucontext_t *uap, FILE* output)
{
#if !defined(NOEXECINFO)
void *addrs[BACKTRACE_DEPTH];
void *pc;
int depth;
#endif
/* flag prevents recursive error when trying to print a broken stack */
#if COGVM
/* Testing stackLimit tells us whether the VM is initialized. */
extern usqInt stackLimitAddress(void);
#endif
fprintf_impl(output,"\n%s%s%s\n\n", msg, date ? " " : "", date ? date : "");
fprintf_impl(output,"%s\n%s\n\n", GetAttributeString(0), getVersionInfo(1));
#if COGVM
/* Do not attempt to report the stack until the VM is initialized!! */
if (!*(char **)stackLimitAddress())
return;
#endif
#ifdef HAVE_EXECINFO_H
fprintf_impl(output,"C stack backtrace & registers:\n");
if (uap) {
addrs[0] = printRegisterState(uap, output);
depth = 1 + backtrace(addrs + 1, BACKTRACE_DEPTH);
}
else{
depth = backtrace(addrs, BACKTRACE_DEPTH);
}
fputc('*', output); /* indicate where pc is */
fflush(output); /* backtrace_symbols_fd uses unbuffered i/o */
backtrace_symbols_fd(addrs, depth + 1, fileno(output));
#endif
if (runningInVMThread()) {
if (!printingStack) {
#if COGVM
/* If we're in generated machine code then the only way the stack
* dump machinery has of giving us an accurate report is if we set
* stackPointer & framePointer to the native stack & frame pointers.
*/
# if __APPLE__ && __MACH__ && __i386__
# if __GNUC__ && !__INTEL_COMPILER /* icc pretends to be gcc */
void *fp = (void *)(uap ? uap->uc_mcontext->__ss.__ebp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext->__ss.__esp: 0);
# else
void *fp = (void *)(uap ? uap->uc_mcontext->ss.ebp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext->ss.esp: 0);
# endif
# elif __APPLE__ && __MACH__ && __x86_64__
void *fp = (void *)(uap ? uap->uc_mcontext->__ss.__rbp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext->__ss.__rsp: 0);
# elif __linux__ && __i386__
void *fp = (void *)(uap ? uap->uc_mcontext.gregs[REG_EBP]: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.gregs[REG_ESP]: 0);
# elif __linux__ && __x86_64__
void *fp = (void *)(uap ? uap->uc_mcontext.gregs[REG_RBP]: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.gregs[REG_RSP]: 0);
# elif __FreeBSD__ && __i386__
void *fp = (void *)(uap ? uap->uc_mcontext.mc_ebp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.mc_esp: 0);
# elif __FreeBSD__ && __x86_64__
void *fp = (void *)(uap ? uap->uc_mcontext.mc_rbp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.mc_rsp: 0);
# elif __OpenBSD__
void *fp = (void *)(uap ? uap->sc_rbp: 0);
void *sp = (void *)(uap ? uap->sc_rsp: 0);
# elif __sun__ && __i386__
void *fp = (void *)(uap ? uap->uc_mcontext.gregs[REG_FP]: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.gregs[REG_SP]: 0);
# elif defined(__arm__) || defined(__arm32__) || defined(ARM32)
void *fp = (void *)(uap ? uap->uc_mcontext.arm_fp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext.arm_sp: 0);
# elif defined(__aarch64__) && __APPLE__
void *fp = (void *)(uap ? uap->uc_mcontext->__ss.__fp: 0);
void *sp = (void *)(uap ? uap->uc_mcontext->__ss.__sp: 0);
# elif defined(__aarch64__)
void *fp = (void *)(uap ? uap->uc_mcontext.regs[29]: 0); // This is the Register that we are using for the FramePointer
void *sp = (void *)(uap ? uap->uc_mcontext.sp: 0);
# else
# error need to implement extracting pc from a ucontext_t on this system
# endif
char *savedSP, *savedFP;
ifValidWriteBackStackPointersSaveTo(fp,sp,&savedFP,&savedSP);
#endif /* COGVM */
printingStack = true;
if (printAll) {
fprintf_impl(output, "\n\nAll Smalltalk process stacks (active first):\n");
printAllStacks();
}
else {
fprintf_impl(output,"\n\nSmalltalk stack dump:\n");
printCallStack();
}
printingStack = false;
#if COGVM
/* Now restore framePointer and stackPointer via same function */
ifValidWriteBackStackPointersSaveTo(savedFP,savedSP,0,0);
#endif
}
}
else {
fprintf_impl(output,"\nNot in VM thread.\n");
}
#if STACKVM
fprintf_impl(output, "\nMost recent primitives\n");
dumpPrimTraceLog();
# if COGVM
fprintf_impl(output,"\n");
reportMinimumUnusedHeadroom();
# endif
#endif
fprintf_impl(output,"\n\t(%s)\n", msg);
fflush(output);
}
EXPORT(void) printStatusAfterError(){
ucontext_t uap;
getcontext(&uap);
int saved_errno = errno;
doReport("VM Error", &uap);
errno = saved_errno;
}
EXPORT(int) fprintf_impl(FILE * stream, const char * format, ... ){
va_list list;
va_start(list, format);
int returnValue = vfprintf(stream, format, list);
va_end(list);
return returnValue;
}
EXPORT(int) vfprintf_impl(FILE * stream, const char * format, va_list arg){
return vfprintf(stream, format, arg);
}