| // Copyright (c) 2007, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #import "OnDemandServer.h" |
| |
| #import "Breakpad.h" |
| #include "common/mac/bootstrap_compat.h" |
| |
| #if DEBUG |
| #define PRINT_MACH_RESULT(result_, message_) \ |
| printf(message_"%s (%d)\n", mach_error_string(result_), result_ ); |
| #if defined(MAC_OS_X_VERSION_10_5) && \ |
| MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 |
| #define PRINT_BOOTSTRAP_RESULT(result_, message_) \ |
| printf(message_"%s (%d)\n", bootstrap_strerror(result_), result_ ); |
| #else |
| #define PRINT_BOOTSTRAP_RESULT(result_, message_) \ |
| PRINT_MACH_RESULT(result_, message_) |
| #endif |
| #else |
| #define PRINT_MACH_RESULT(result_, message_) |
| #define PRINT_BOOTSTRAP_RESULT(result_, message_) |
| #endif |
| |
| //============================================================================== |
| OnDemandServer* OnDemandServer::Create(const char* server_command, |
| const char* service_name, |
| bool unregister_on_cleanup, |
| kern_return_t* out_result) { |
| OnDemandServer* server = new OnDemandServer(); |
| |
| if (!server) return NULL; |
| |
| kern_return_t result = server->Initialize(server_command, |
| service_name, |
| unregister_on_cleanup); |
| |
| if (out_result) { |
| *out_result = result; |
| } |
| |
| if (result == KERN_SUCCESS) { |
| return server; |
| } |
| |
| delete server; |
| return NULL; |
| } |
| |
| //============================================================================== |
| kern_return_t OnDemandServer::Initialize(const char* server_command, |
| const char* service_name, |
| bool unregister_on_cleanup) { |
| unregister_on_cleanup_ = unregister_on_cleanup; |
| |
| mach_port_t self_task = mach_task_self(); |
| |
| mach_port_t bootstrap_port; |
| kern_return_t kr = task_get_bootstrap_port(self_task, &bootstrap_port); |
| if (kr != KERN_SUCCESS) { |
| PRINT_MACH_RESULT(kr, "task_get_bootstrap_port(): "); |
| return kr; |
| } |
| |
| mach_port_t bootstrap_subset_port; |
| kr = bootstrap_subset(bootstrap_port, self_task, &bootstrap_subset_port); |
| if (kr != BOOTSTRAP_SUCCESS) { |
| PRINT_BOOTSTRAP_RESULT(kr, "bootstrap_subset(): "); |
| return kr; |
| } |
| |
| // The inspector will be invoked with its bootstrap port set to the subset, |
| // but the sender will need access to the original bootstrap port. Although |
| // the original port is the subset's parent, bootstrap_parent can't be used |
| // because it requires extra privileges. Stash the original bootstrap port |
| // in the subset by registering it under a known name. The inspector will |
| // recover this port and set it as its own bootstrap port in Inspector.mm |
| // Inspector::ResetBootstrapPort. |
| kr = breakpad::BootstrapRegister( |
| bootstrap_subset_port, |
| const_cast<char*>(BREAKPAD_BOOTSTRAP_PARENT_PORT), |
| bootstrap_port); |
| if (kr != BOOTSTRAP_SUCCESS) { |
| PRINT_BOOTSTRAP_RESULT(kr, "bootstrap_register(): "); |
| return kr; |
| } |
| |
| kr = bootstrap_create_server(bootstrap_subset_port, |
| const_cast<char*>(server_command), |
| geteuid(), // server uid |
| true, |
| &server_port_); |
| if (kr != BOOTSTRAP_SUCCESS) { |
| PRINT_BOOTSTRAP_RESULT(kr, "bootstrap_create_server(): "); |
| return kr; |
| } |
| |
| strlcpy(service_name_, service_name, sizeof(service_name_)); |
| |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wdeprecated-declarations" |
| // Create a service called service_name, and return send rights to |
| // that port in service_port_. |
| kr = bootstrap_create_service(server_port_, |
| const_cast<char*>(service_name), |
| &service_port_); |
| #pragma clang diagnostic pop |
| if (kr != BOOTSTRAP_SUCCESS) { |
| PRINT_BOOTSTRAP_RESULT(kr, "bootstrap_create_service(): "); |
| |
| // perhaps the service has already been created - try to look it up |
| kr = bootstrap_look_up(bootstrap_port, (char*)service_name, &service_port_); |
| |
| if (kr != BOOTSTRAP_SUCCESS) { |
| PRINT_BOOTSTRAP_RESULT(kr, "bootstrap_look_up(): "); |
| Unregister(); // clean up server port |
| return kr; |
| } |
| } |
| |
| return KERN_SUCCESS; |
| } |
| |
| //============================================================================== |
| OnDemandServer::~OnDemandServer() { |
| if (unregister_on_cleanup_) { |
| Unregister(); |
| } |
| } |
| |
| //============================================================================== |
| void OnDemandServer::LaunchOnDemand() { |
| // We need to do this, since the launched server is another process |
| // and holding on to this port delays launching until the current process |
| // exits! |
| mach_port_deallocate(mach_task_self(), server_port_); |
| server_port_ = MACH_PORT_DEAD; |
| |
| // Now, the service is still registered and all we need to do is send |
| // a mach message to the service port in order to launch the server. |
| } |
| |
| //============================================================================== |
| void OnDemandServer::Unregister() { |
| if (service_port_ != MACH_PORT_NULL) { |
| mach_port_deallocate(mach_task_self(), service_port_); |
| service_port_ = MACH_PORT_NULL; |
| } |
| |
| if (server_port_ != MACH_PORT_NULL) { |
| // unregister the service |
| kern_return_t kr = breakpad::BootstrapRegister(server_port_, |
| service_name_, |
| MACH_PORT_NULL); |
| |
| if (kr != KERN_SUCCESS) { |
| PRINT_MACH_RESULT(kr, "Breakpad UNREGISTER : bootstrap_register() : "); |
| } |
| |
| mach_port_deallocate(mach_task_self(), server_port_); |
| server_port_ = MACH_PORT_NULL; |
| } |
| } |
