bool FunctionType::canCastTo (Type* dest_ty) const { if (!st::isa<st::FunctionType>(dest_ty)) return false; st::FunctionType* dest = st::cast<st::FunctionType>(dest_ty); if (dest->ArgumentCount() != ArgumentCount()) return false; if (dest->ReturnType() != ReturnType()) return false; for (size_t i = 0; i < ArgumentCount(); ++i) { if (!getArgument(i)->canCastTo(dest->getArgument(i))) return false; } return true; }
void FunctionType::_computeName () { _name = "("; for (size_t i = 0; i < ArgumentCount(); ++i) { if (i != 0) _name += ","; _name += _arguments[i]->gQualifiedName(); } _name += ") -> "; _name += _return_type->gQualifiedName(); }
int DTraceJSDT::pd_activate( void* moduleBaseAddress, jstring module, jint providers_count, JVM_DTraceProvider* providers) { // We need sections: // (1) STRTAB // ( // (2) PROVIDER // (3) PROBES // (4) PROBOFFS // (5) PROBARGS // ) * Number of Providers // Type of sections we create enum { STRTAB = 0, PROVIDERS = 1, PROBES = 2, PROBE_OFFSETS = 3, ARG_OFFSETS = 4, NUM_SECTIONS = 5 }; static int alignment_for[NUM_SECTIONS] = { 1, 4, 8, 4, 1 }; ResourceMark rm; uint32_t num_sections = 1 + 4 * providers_count; uint32_t offset = sizeof(dof_hdr_t) + (num_sections * sizeof(dof_sec_t)); uint32_t* secoffs = NEW_RESOURCE_ARRAY(uint32_t, num_sections); uint32_t* secsize = NEW_RESOURCE_ARRAY(uint32_t, num_sections); // Store offsets of all strings here in such order: // zero-string (always 0) // provider1-name // probe1-function // probe1-name // arg-1 // arg-2 // ... // probe2-function // probe2-name // arg-1 // arg-2 // provider2-name // ... uint32_t strcount = 0; // Count the number of strings we'll need for(int prvc = 0; prvc < providers_count; ++prvc) { JVM_DTraceProvider* provider = &providers[prvc]; // Provider name ++strcount; for(int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* p = &(provider->probes[prbc]); symbolOop sig = JNIHandles::resolve_jmethod_id(p->method)->signature(); // function + name + one per argument strcount += 2 + ArgumentCount(sig).size(); } } // Create place for string offsets uint32_t* stroffs = NEW_RESOURCE_ARRAY(uint32_t, strcount + 1); uint32_t string_index = 0; uint32_t curstr = 0; // First we need an empty string: "" stroffs[curstr++] = string_index; string_index += strlen("") + 1; for(int prvc = 0; prvc < providers_count; ++prvc) { JVM_DTraceProvider* provider = &providers[prvc]; char* provider_name = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(provider->name)); stroffs[curstr++] = string_index; string_index += strlen(provider_name) + 1; // All probes for(int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* p = &(provider->probes[prbc]); char* function = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(p->function)); stroffs[curstr++] = string_index; string_index += strlen(function) + 1; char* name = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(p->name)); stroffs[curstr++] = string_index; string_index += strlen(name) + 1; symbolOop sig = JNIHandles::resolve_jmethod_id(p->method)->signature(); SignatureStream ss(sig); for ( ; !ss.at_return_type(); ss.next()) { BasicType bt = ss.type(); const char* t = NULL; if (bt == T_OBJECT && ss.as_symbol_or_null() == vmSymbols::java_lang_String()) { t = string_sig; } else if (bt == T_LONG) { t = long_sig; } else { t = int_sig; } stroffs[curstr++] = string_index; string_index += strlen(t) + 1; } } } secoffs[STRTAB] = offset; secsize[STRTAB] = string_index; offset += string_index; // Calculate the size of the rest for(int prvc = 0; prvc < providers_count; ++prvc) { JVM_DTraceProvider* provider = &providers[prvc]; size_t provider_sec = PROVIDERS + prvc * 4; size_t probe_sec = PROBES + prvc * 4; size_t probeoffs_sec = PROBE_OFFSETS + prvc * 4; size_t argoffs_sec = ARG_OFFSETS + prvc * 4; // Allocate space for the provider data struction secoffs[provider_sec] = align_size_up(offset, alignment_for[PROVIDERS]); secsize[provider_sec] = sizeof(dof_provider_t); offset = secoffs[provider_sec] + secsize[provider_sec]; // Allocate space for all the probes secoffs[probe_sec] = align_size_up(offset, alignment_for[PROBES]); secsize[probe_sec] = sizeof(dof_probe_t) * provider->probe_count; offset = secoffs[probe_sec] + secsize[probe_sec]; // Allocate space for the probe offsets secoffs[probeoffs_sec] = align_size_up(offset, alignment_for[PROBE_OFFSETS]); secsize[probeoffs_sec] = sizeof(uint32_t) * provider->probe_count; offset = secoffs[probeoffs_sec] + secsize[probeoffs_sec]; // We need number of arguments argoffs uint32_t argscount = 0; for(int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* p = &(provider->probes[prbc]); symbolOop sig = JNIHandles::resolve_jmethod_id(p->method)->signature(); argscount += ArgumentCount(sig).size(); } secoffs[argoffs_sec] = align_size_up(offset, alignment_for[ARG_OFFSETS]); secsize[argoffs_sec] = sizeof(uint8_t) * argscount; offset = secoffs[argoffs_sec] + secsize[argoffs_sec]; } uint32_t size = offset; uint8_t* dof = NEW_RESOURCE_ARRAY(uint8_t, size); if (!dof) { return -1; } memset((void*)dof, 0, size); // Fill memory with proper values dof_hdr_t* hdr = (dof_hdr_t*)dof; hdr->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0; hdr->dofh_ident[DOF_ID_MAG1] = DOF_MAG_MAG1; hdr->dofh_ident[DOF_ID_MAG2] = DOF_MAG_MAG2; hdr->dofh_ident[DOF_ID_MAG3] = DOF_MAG_MAG3; hdr->dofh_ident[DOF_ID_MODEL] = DOF_MODEL_NATIVE; // No variants hdr->dofh_ident[DOF_ID_ENCODING] = DOF_ENCODE_NATIVE; // No variants hdr->dofh_ident[DOF_ID_VERSION] = DOF_VERSION_1; // No variants hdr->dofh_ident[DOF_ID_DIFVERS] = DIF_VERSION_2; // No variants // all other fields of ident to zero hdr->dofh_flags = 0; hdr->dofh_hdrsize = sizeof(dof_hdr_t); hdr->dofh_secsize = sizeof(dof_sec_t); hdr->dofh_secnum = num_sections; hdr->dofh_secoff = sizeof(dof_hdr_t); hdr->dofh_loadsz = size; hdr->dofh_filesz = size; // First section: STRTAB dof_sec_t* sec = (dof_sec_t*)(dof + sizeof(dof_hdr_t)); sec->dofs_type = DOF_SECT_STRTAB; sec->dofs_align = alignment_for[STRTAB]; sec->dofs_flags = DOF_SECF_LOAD; sec->dofs_entsize = 0; sec->dofs_offset = secoffs[STRTAB]; sec->dofs_size = secsize[STRTAB]; // Make data for this section char* str = (char*)(dof + sec->dofs_offset); *str = 0; str += 1; // "" // Run through all strings again for(int prvc = 0; prvc < providers_count; ++prvc) { JVM_DTraceProvider* provider = &providers[prvc]; char* provider_name = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(provider->name)); strcpy(str, provider_name); str += strlen(provider_name) + 1; // All probes for(int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* p = &(provider->probes[prbc]); char* function = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(p->function)); strcpy(str, function); str += strlen(str) + 1; char* name = java_lang_String::as_utf8_string( JNIHandles::resolve_non_null(p->name)); strcpy(str, name); str += strlen(name) + 1; symbolOop sig = JNIHandles::resolve_jmethod_id(p->method)->signature(); SignatureStream ss(sig); for ( ; !ss.at_return_type(); ss.next()) { BasicType bt = ss.type(); const char* t; if (bt == T_OBJECT && ss.as_symbol_or_null() == vmSymbols::java_lang_String()) { t = string_sig; } else if (bt == T_LONG) { t = long_sig; } else { t = int_sig; } strcpy(str, t); str += strlen(t) + 1; } } } curstr = 1; for(int prvc = 0; prvc < providers_count; ++prvc) { JVM_DTraceProvider* provider = &providers[prvc]; size_t provider_sec = PROVIDERS + prvc * 4; size_t probe_sec = PROBES + prvc * 4; size_t probeoffs_sec = PROBE_OFFSETS + prvc * 4; size_t argoffs_sec = ARG_OFFSETS + prvc * 4; // PROVIDER /////////////////////////////////////////////////////////////// // Section header sec = (dof_sec_t*) (dof + sizeof(dof_hdr_t) + sizeof(dof_sec_t) * provider_sec); sec->dofs_type = DOF_SECT_PROVIDER; sec->dofs_align = alignment_for[PROVIDERS]; sec->dofs_flags = DOF_SECF_LOAD; sec->dofs_entsize = 0; sec->dofs_offset = secoffs[provider_sec]; sec->dofs_size = secsize[provider_sec]; // Make provider decriiption dof_provider_t* prv = (dof_provider_t*)(dof + sec->dofs_offset); prv->dofpv_strtab = STRTAB; prv->dofpv_probes = probe_sec; prv->dofpv_prargs = argoffs_sec; prv->dofpv_proffs = probeoffs_sec; prv->dofpv_name = stroffs[curstr++]; // Index in string table prv->dofpv_provattr = DOF_ATTR( provider->providerAttributes.nameStability, provider->providerAttributes.dataStability, provider->providerAttributes.dependencyClass); prv->dofpv_modattr = DOF_ATTR( provider->moduleAttributes.nameStability, provider->moduleAttributes.dataStability, provider->moduleAttributes.dependencyClass); prv->dofpv_funcattr = DOF_ATTR( provider->functionAttributes.nameStability, provider->functionAttributes.dataStability, provider->functionAttributes.dependencyClass); prv->dofpv_nameattr = DOF_ATTR( provider->nameAttributes.nameStability, provider->nameAttributes.dataStability, provider->nameAttributes.dependencyClass); prv->dofpv_argsattr = DOF_ATTR( provider->argsAttributes.nameStability, provider->argsAttributes.dataStability, provider->argsAttributes.dependencyClass); // PROBES ///////////////////////////////////////////////////////////////// // Section header sec = (dof_sec_t*) (dof + sizeof(dof_hdr_t) + sizeof(dof_sec_t) * probe_sec); sec->dofs_type = DOF_SECT_PROBES; sec->dofs_align = alignment_for[PROBES]; sec->dofs_flags = DOF_SECF_LOAD; sec->dofs_entsize = sizeof(dof_probe_t); sec->dofs_offset = secoffs[probe_sec]; sec->dofs_size = secsize[probe_sec]; // Make probes descriptions uint32_t argsoffs = 0; for(int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* probe = &(provider->probes[prbc]); methodOop m = JNIHandles::resolve_jmethod_id(probe->method); int arg_count = ArgumentCount(m->signature()).size(); assert(m->code() != NULL, "must have an nmethod"); dof_probe_t* prb = (dof_probe_t*)(dof + sec->dofs_offset + prbc * sizeof(dof_probe_t)); prb->dofpr_addr = (uint64_t)m->code()->entry_point(); prb->dofpr_func = stroffs[curstr++]; // Index in string table prb->dofpr_name = stroffs[curstr++]; // Index in string table prb->dofpr_nargv = stroffs[curstr ]; // Index in string table // We spent siglen strings here curstr += arg_count; prb->dofpr_xargv = prb->dofpr_nargv; // Same bunch of strings prb->dofpr_argidx = argsoffs; prb->dofpr_offidx = prbc; prb->dofpr_nargc = arg_count; prb->dofpr_xargc = arg_count; prb->dofpr_noffs = 1; // Number of offsets // Next bunch of offsets argsoffs += arg_count; } // PROFFS ///////////////////////////////////////////////////////////////// // Section header sec = (dof_sec_t*) (dof + sizeof(dof_hdr_t) + sizeof(dof_sec_t) * probeoffs_sec); sec->dofs_type = DOF_SECT_PROFFS; sec->dofs_align = alignment_for[PROBE_OFFSETS]; sec->dofs_flags = DOF_SECF_LOAD; sec->dofs_entsize = sizeof(uint32_t); sec->dofs_offset = secoffs[probeoffs_sec]; sec->dofs_size = secsize[probeoffs_sec]; // Make offsets for (int prbc = 0; prbc < provider->probe_count; ++prbc) { uint32_t* pof = (uint32_t*)(dof + sec->dofs_offset + sizeof(uint32_t) * prbc); JVM_DTraceProbe* probe = &(provider->probes[prbc]); methodOop m = JNIHandles::resolve_jmethod_id(probe->method); *pof = m->code()->trap_offset(); } // PRARGS ///////////////////////////////////////////////////////////////// // Section header sec = (dof_sec_t*) (dof + sizeof(dof_hdr_t) + sizeof(dof_sec_t) * argoffs_sec); sec->dofs_type = DOF_SECT_PRARGS; sec->dofs_align = alignment_for[ARG_OFFSETS]; sec->dofs_flags = DOF_SECF_LOAD; sec->dofs_entsize = sizeof(uint8_t); sec->dofs_offset = secoffs[argoffs_sec]; sec->dofs_size = secsize[argoffs_sec]; // Make arguments uint8_t* par = (uint8_t*)(dof + sec->dofs_offset); for (int prbc = 0; prbc < provider->probe_count; ++prbc) { JVM_DTraceProbe* p = &(provider->probes[prbc]); symbolOop sig = JNIHandles::resolve_jmethod_id(p->method)->signature(); uint8_t count = (uint8_t)ArgumentCount(sig).size(); for (uint8_t i = 0; i < count; ++i) { *par++ = i; } } } // Register module return dof_register(module, dof, moduleBaseAddress); }