Commit m5threads package.
This patch adds limited multithreading support in syscall-emulation mode, by using the clone system call. The clone system call works for Alpha, SPARC and x86, and multithreaded applications run correctly in Alpha and SPARC.
This commit is contained in:
Daniel Sanchez
parent
b0489d18ed
commit
b0e9654f86
7 changed files with 156 additions and 25 deletions
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@ -434,7 +434,7 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
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/* 309 */ SyscallDesc("get_kernel_syms", unimplementedFunc),
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/* 310 */ SyscallDesc("syslog", unimplementedFunc),
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/* 311 */ SyscallDesc("reboot", unimplementedFunc),
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/* 312 */ SyscallDesc("clone", unimplementedFunc),
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/* 312 */ SyscallDesc("clone", cloneFunc),
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/* 313 */ SyscallDesc("uselib", unimplementedFunc),
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/* 314 */ SyscallDesc("mlock", unimplementedFunc),
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/* 315 */ SyscallDesc("munlock", unimplementedFunc),
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@ -527,7 +527,7 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
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/* 402 */ SyscallDesc("io_cancel", unimplementedFunc),
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/* 403 */ SyscallDesc("unknown #403", unimplementedFunc),
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/* 404 */ SyscallDesc("unknown #404", unimplementedFunc),
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/* 405 */ SyscallDesc("exit_group", exitFunc), // exit all threads...
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/* 405 */ SyscallDesc("exit_group", exitGroupFunc), // exit all threads...
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/* 406 */ SyscallDesc("lookup_dcookie", unimplementedFunc),
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/* 407 */ SyscallDesc("sys_epoll_create", unimplementedFunc),
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/* 408 */ SyscallDesc("sys_epoll_ctl", unimplementedFunc),
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@ -162,7 +162,7 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
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/* 71 */ SyscallDesc("mmap", mmapFunc<Sparc32Linux>),
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/* 72 */ SyscallDesc("setreuid32", unimplementedFunc),
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/* 73 */ SyscallDesc("munmap", munmapFunc),
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/* 74 */ SyscallDesc("mprotect", unimplementedFunc),
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/* 74 */ SyscallDesc("mprotect", ignoreFunc),
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/* 75 */ SyscallDesc("madvise", unimplementedFunc),
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/* 76 */ SyscallDesc("vhangup", unimplementedFunc),
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/* 77 */ SyscallDesc("truncate64", unimplementedFunc), //32 bit
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@ -191,20 +191,20 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
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/* 100 */ SyscallDesc("getpriority", unimplementedFunc), //32 bit
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/* 101 */ SyscallDesc("rt_sigreturn", unimplementedFunc), //32 bit
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/* 102 */ SyscallDesc("rt_sigaction", ignoreFunc), //32 bit
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/* 103 */ SyscallDesc("rt_sigprocmask", unimplementedFunc), //32 bit
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/* 103 */ SyscallDesc("rt_sigprocmask", ignoreFunc), //32 bit
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/* 104 */ SyscallDesc("rt_sigpending", unimplementedFunc), //32 bit
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/* 105 */ SyscallDesc("rt_sigtimedwait", unimplementedFunc),
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/* 106 */ SyscallDesc("rt_sigqueueinfo", unimplementedFunc), //32 bit
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/* 107 */ SyscallDesc("rt_sigsuspend", unimplementedFunc),
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/* 108 */ SyscallDesc("setresuid32", unimplementedFunc),
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/* 109 */ SyscallDesc("getresuid32", getresuidFunc),
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/* 110 */ SyscallDesc("setresgid32", unimplementedFunc),
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/* 110 */ SyscallDesc("setresgid32", ignoreFunc),
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/* 111 */ SyscallDesc("getresgid32", unimplementedFunc),
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/* 112 */ SyscallDesc("setregid32", unimplementedFunc),
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/* 113 */ SyscallDesc("revcmsg", unimplementedFunc),
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/* 114 */ SyscallDesc("sendmsg", unimplementedFunc),
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/* 115 */ SyscallDesc("getgroups32", unimplementedFunc), //32 bit
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/* 116 */ SyscallDesc("gettimeofday", unimplementedFunc), //32 bit
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/* 116 */ SyscallDesc("gettimeofday", gettimeofdayFunc<Sparc32Linux>), //32 bit
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/* 117 */ SyscallDesc("getrusage", unimplementedFunc), //32 bit
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/* 118 */ SyscallDesc("getsockopt", unimplementedFunc),
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/* 119 */ SyscallDesc("getcwd", getcwdFunc),
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@ -276,7 +276,7 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
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/* 185 */ SyscallDesc("setpgid", unimplementedFunc), //32 bit
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/* 186 */ SyscallDesc("fremovexattr", unimplementedFunc), //32 bit
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/* 187 */ SyscallDesc("tkill", unimplementedFunc), //32 bit
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/* 188 */ SyscallDesc("exit_group", exitFunc), //32 bit
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/* 188 */ SyscallDesc("exit_group", exitGroupFunc), //32 bit
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/* 189 */ SyscallDesc("uname", unameFunc),
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/* 190 */ SyscallDesc("init_module", unimplementedFunc), //32 bit
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/* 191 */ SyscallDesc("personality", unimplementedFunc),
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@ -305,7 +305,7 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
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/* 214 */ SyscallDesc("sysinfo", unimplementedFunc), //32 bit
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/* 215 */ SyscallDesc("ipc", unimplementedFunc), //32 bit
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/* 216 */ SyscallDesc("sigreturn", unimplementedFunc), //32 bit
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/* 217 */ SyscallDesc("clone", unimplementedFunc),
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/* 217 */ SyscallDesc("clone", cloneFunc),
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/* 218 */ SyscallDesc("ioprio_get", unimplementedFunc), //32 bit
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/* 219 */ SyscallDesc("adjtimex", unimplementedFunc), //32 bit
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/* 220 */ SyscallDesc("sigprocmask", unimplementedFunc), //32 bit
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@ -468,7 +468,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
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/* 71 */ SyscallDesc("mmap", mmapFunc<SparcLinux>),
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/* 72 */ SyscallDesc("setreuid32", unimplementedFunc),
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/* 73 */ SyscallDesc("munmap", munmapFunc),
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/* 74 */ SyscallDesc("mprotect", unimplementedFunc),
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/* 74 */ SyscallDesc("mprotect", ignoreFunc),
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/* 75 */ SyscallDesc("madvise", unimplementedFunc),
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/* 76 */ SyscallDesc("vhangup", unimplementedFunc),
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/* 77 */ SyscallDesc("truncate64", unimplementedFunc),
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@ -497,20 +497,20 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
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/* 100 */ SyscallDesc("getpriority", unimplementedFunc),
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/* 101 */ SyscallDesc("rt_sigreturn", unimplementedFunc),
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/* 102 */ SyscallDesc("rt_sigaction", ignoreFunc),
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/* 103 */ SyscallDesc("rt_sigprocmask", unimplementedFunc),
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/* 103 */ SyscallDesc("rt_sigprocmask", ignoreFunc),
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/* 104 */ SyscallDesc("rt_sigpending", unimplementedFunc),
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/* 105 */ SyscallDesc("rt_sigtimedwait", unimplementedFunc),
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/* 106 */ SyscallDesc("rt_sigqueueinfo", unimplementedFunc),
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/* 107 */ SyscallDesc("rt_sigsuspend", unimplementedFunc),
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/* 108 */ SyscallDesc("setresuid", unimplementedFunc),
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/* 109 */ SyscallDesc("getresuid", getresuidFunc),
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/* 110 */ SyscallDesc("setresgid", unimplementedFunc),
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/* 110 */ SyscallDesc("setresgid", ignoreFunc),
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/* 111 */ SyscallDesc("getresgid", unimplementedFunc),
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/* 112 */ SyscallDesc("setregid32", unimplementedFunc),
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/* 113 */ SyscallDesc("recvmsg", unimplementedFunc),
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/* 114 */ SyscallDesc("sendmsg", unimplementedFunc),
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/* 115 */ SyscallDesc("getgroups32", unimplementedFunc),
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/* 116 */ SyscallDesc("gettimeofday", unimplementedFunc),
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/* 116 */ SyscallDesc("gettimeofday", gettimeofdayFunc<SparcLinux>),
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/* 117 */ SyscallDesc("getrusage", unimplementedFunc),
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/* 118 */ SyscallDesc("getsockopt", unimplementedFunc),
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/* 119 */ SyscallDesc("getcwd", unimplementedFunc),
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@ -582,7 +582,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
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/* 185 */ SyscallDesc("setpgid", unimplementedFunc),
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/* 186 */ SyscallDesc("fremovexattr", unimplementedFunc),
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/* 187 */ SyscallDesc("tkill", unimplementedFunc),
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/* 188 */ SyscallDesc("exit_group", exitFunc),
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/* 188 */ SyscallDesc("exit_group", exitGroupFunc),
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/* 189 */ SyscallDesc("uname", unameFunc),
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/* 190 */ SyscallDesc("init_module", unimplementedFunc),
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/* 191 */ SyscallDesc("personality", unimplementedFunc),
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@ -611,7 +611,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
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/* 214 */ SyscallDesc("sysinfo", unimplementedFunc),
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/* 215 */ SyscallDesc("ipc", unimplementedFunc),
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/* 216 */ SyscallDesc("sigreturn", unimplementedFunc),
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/* 217 */ SyscallDesc("clone", unimplementedFunc),
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/* 217 */ SyscallDesc("clone", cloneFunc),
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/* 218 */ SyscallDesc("ioprio_get", unimplementedFunc),
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/* 219 */ SyscallDesc("adjtimex", unimplementedFunc),
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/* 220 */ SyscallDesc("sigprocmask", unimplementedFunc),
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@ -353,9 +353,30 @@ void SparcISA::copyMiscRegs(ThreadContext *src, ThreadContext *dest)
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void SparcISA::copyRegs(ThreadContext *src, ThreadContext *dest)
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{
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//First loop through the integer registers.
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for (int i = 0; i < SparcISA::NumIntRegs; ++i) {
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dest->setIntReg(i, src->readIntReg(i));
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int old_gl = src->readMiscRegNoEffect(MISCREG_GL);
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int old_cwp = src->readMiscRegNoEffect(MISCREG_CWP);
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//Globals
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for (int x = 0; x < MaxGL; ++x) {
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src->setMiscRegNoEffect(MISCREG_GL, x);
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dest->setMiscRegNoEffect(MISCREG_GL, x);
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for (int y = 0; y < 8; y++)
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dest->setIntReg(y, src->readIntReg(y));
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}
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//Locals/Ins/Outs
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for (int x = 0; x < NWindows; ++x) {
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src->setMiscRegNoEffect(MISCREG_CWP, x);
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dest->setMiscRegNoEffect(MISCREG_CWP, x);
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for (int y = 8; y < 32; y++)
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dest->setIntReg(y, src->readIntReg(y));
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}
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//MicroIntRegs
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for (int y = 0; y < NumMicroIntRegs; ++y)
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dest->setIntReg(y+32, src->readIntReg(y+32));
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//Restore src's GL, CWP
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src->setMiscRegNoEffect(MISCREG_GL, old_gl);
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src->setMiscRegNoEffect(MISCREG_CWP, old_cwp);
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// Then loop through the floating point registers.
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for (int i = 0; i < SparcISA::NumFloatRegs; ++i) {
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@ -365,8 +386,10 @@ void SparcISA::copyRegs(ThreadContext *src, ThreadContext *dest)
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// Copy misc. registers
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copyMiscRegs(src, dest);
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// Lastly copy PC/NPC
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dest->setPC(src->readPC());
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dest->setNextPC(src->readNextPC());
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dest->setNextNPC(src->readNextNPC());
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}
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@ -267,7 +267,7 @@ SyscallDesc X86_64LinuxProcess::syscallDescs[] = {
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/* 36 */ SyscallDesc("getitimer", unimplementedFunc),
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/* 37 */ SyscallDesc("alarm", unimplementedFunc),
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/* 38 */ SyscallDesc("setitimer", unimplementedFunc),
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/* 39 */ SyscallDesc("getpid", unimplementedFunc),
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/* 39 */ SyscallDesc("getpid", getpidFunc),
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/* 40 */ SyscallDesc("sendfile", unimplementedFunc),
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/* 41 */ SyscallDesc("socket", unimplementedFunc),
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/* 42 */ SyscallDesc("connect", unimplementedFunc),
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@ -284,7 +284,7 @@ SyscallDesc X86_64LinuxProcess::syscallDescs[] = {
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/* 53 */ SyscallDesc("socketpair", unimplementedFunc),
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/* 54 */ SyscallDesc("setsockopt", unimplementedFunc),
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/* 55 */ SyscallDesc("getsockopt", unimplementedFunc),
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/* 56 */ SyscallDesc("clone", unimplementedFunc),
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/* 56 */ SyscallDesc("clone", cloneFunc),
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/* 57 */ SyscallDesc("fork", unimplementedFunc),
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/* 58 */ SyscallDesc("vfork", unimplementedFunc),
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/* 59 */ SyscallDesc("execve", unimplementedFunc),
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@ -430,7 +430,7 @@ SyscallDesc X86_64LinuxProcess::syscallDescs[] = {
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/* 199 */ SyscallDesc("fremovexattr", unimplementedFunc),
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/* 200 */ SyscallDesc("tkill", unimplementedFunc),
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/* 201 */ SyscallDesc("time", unimplementedFunc),
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/* 202 */ SyscallDesc("futex", unimplementedFunc),
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/* 202 */ SyscallDesc("futex", ignoreFunc),
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/* 203 */ SyscallDesc("sched_setaffinity", unimplementedFunc),
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/* 204 */ SyscallDesc("sched_getaffinity", unimplementedFunc),
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/* 205 */ SyscallDesc("set_thread_area", unimplementedFunc),
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@ -459,7 +459,7 @@ SyscallDesc X86_64LinuxProcess::syscallDescs[] = {
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/* 228 */ SyscallDesc("clock_gettime", unimplementedFunc),
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/* 229 */ SyscallDesc("clock_getres", unimplementedFunc),
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/* 230 */ SyscallDesc("clock_nanosleep", unimplementedFunc),
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/* 231 */ SyscallDesc("exit_group", exitFunc),
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/* 231 */ SyscallDesc("exit_group", exitGroupFunc),
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/* 232 */ SyscallDesc("epoll_wait", unimplementedFunc),
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/* 233 */ SyscallDesc("epoll_ctl", unimplementedFunc),
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/* 234 */ SyscallDesc("tgkill", unimplementedFunc),
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@ -250,7 +250,17 @@ RegFile::unserialize(EventManager *em, Checkpoint *cp, const string §ion)
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void X86ISA::copyMiscRegs(ThreadContext *src, ThreadContext *dest)
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{
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panic("copyMiscRegs not implemented for x86!\n");
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//panic("copyMiscRegs not implemented for x86!\n");
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warn("copyMiscRegs is naively implemented for x86\n");
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for (int i = 0; i < X86ISA::NumMiscRegs; ++i) {
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if ( ( i != MISCREG_CR1 &&
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!(i > MISCREG_CR4 && i < MISCREG_CR8) &&
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!(i > MISCREG_CR8 && i <= MISCREG_CR15) ) == false) {
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continue;
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}
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dest->setMiscRegNoEffect(i, src->readMiscRegNoEffect(i));
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}
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}
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void X86ISA::copyRegs(ThreadContext *src, ThreadContext *dest)
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@ -105,6 +105,19 @@ exitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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}
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SyscallReturn
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exitGroupFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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ThreadContext *tc)
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{
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// really should just halt all thread contexts belonging to this
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// process in case there's another process running...
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exitSimLoop("target called exit()",
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process->getSyscallArg(tc, 0) & 0xff);
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return 1;
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}
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SyscallReturn
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getpagesizeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
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{
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@ -641,3 +654,81 @@ getegidFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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}
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SyscallReturn
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cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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ThreadContext *tc)
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{
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DPRINTF(SyscallVerbose, "In sys_clone:\n");
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DPRINTF(SyscallVerbose, " Flags=%llx\n", tc->getSyscallArg(0));
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DPRINTF(SyscallVerbose, " Child stack=%llx\n", tc->getSyscallArg(1));
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if (tc->getSyscallArg(0) != 0x10f00) {
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warn("This sys_clone implementation assumes flags CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD (0x10f00), and may not work correctly with given flags 0x%llx\n", tc->getSyscallArg(0));
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}
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ThreadContext* ctc; //child thread context
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if ( ( ctc = process->findFreeContext() ) != NULL ) {
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DPRINTF(SyscallVerbose, " Found unallocated thread context\n");
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ctc->clearArchRegs();
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//Arch-specific cloning code
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#if THE_ISA == ALPHA_ISA or THE_ISA == X86_ISA
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//Cloning the misc. regs for these archs is enough
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TheISA::copyMiscRegs(tc, ctc);
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#elif THE_ISA == SPARC_ISA
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TheISA::copyRegs(tc, ctc);
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//TODO: Explain what this code actually does :-)
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ctc->setIntReg(NumIntArchRegs + 6, 0);
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ctc->setIntReg(NumIntArchRegs + 4, 0);
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ctc->setIntReg(NumIntArchRegs + 3, NWindows - 2);
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ctc->setIntReg(NumIntArchRegs + 5, NWindows);
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ctc->setMiscRegNoEffect(MISCREG_CWP, 0);
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ctc->setIntReg(NumIntArchRegs + 7, 0);
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ctc->setMiscRegNoEffect(MISCREG_TL, 0);
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ctc->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
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for (int y = 8; y < 32; y++)
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ctc->setIntReg(y, tc->readIntReg(y));
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#else
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fatal("sys_clone is not implemented for this ISA\n");
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#endif
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//Set up stack register
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ctc->setIntReg(TheISA::StackPointerReg, tc->getSyscallArg(1));
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//Set up syscall return values in parent and child
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ctc->setIntReg(ReturnValueReg, 0); //return value, child
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//Alpha needs SyscallSuccessReg=0 in child
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#if THE_ISA == ALPHA_ISA
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ctc->setIntReg(SyscallSuccessReg, 0);
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#endif
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//In SPARC/Linux, clone returns 0 on pseudo-return register if parent, non-zero if child
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#if THE_ISA == SPARC_ISA
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tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0);
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ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1);
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#endif
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ctc->setPC(tc->readNextPC());
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ctc->setNextPC(tc->readNextPC() + sizeof(TheISA::MachInst));
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//In SPARC, need NNPC too...
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#if THE_ISA == SPARC_ISA
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ctc->setNextNPC(tc->readNextNPC() + sizeof(TheISA::MachInst));
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#endif
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ctc->activate();
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// Should return nonzero child TID in parent's syscall return register,
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// but for our pthread library any non-zero value will work
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return 1;
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} else {
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fatal("Called sys_clone, but no unallocated thread contexts found!\n");
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return 0;
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}
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}
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@ -183,10 +183,14 @@ SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
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SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target exit() handler: terminate simulation.
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/// Target exit() handler: terminate current context.
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SyscallReturn exitFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target exit_group() handler: terminate simulation. (exit all threads)
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SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getpagesize() handler.
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SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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@ -308,6 +312,9 @@ SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
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SyscallReturn getegidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target clone() handler.
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SyscallReturn cloneFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Pseudo Funcs - These functions use a different return convension,
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@ -1013,8 +1020,8 @@ gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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getElapsedTime(tp->tv_sec, tp->tv_usec);
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tp->tv_sec += seconds_since_epoch;
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tp->tv_sec = htog(tp->tv_sec);
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tp->tv_usec = htog(tp->tv_usec);
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tp->tv_sec = TheISA::htog(tp->tv_sec);
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tp->tv_usec = TheISA::htog(tp->tv_usec);
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tp.copyOut(tc->getMemPort());
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