| /* Copyright (C) 2007-2008 The Android Open Source Project |
| ** |
| ** This software is licensed under the terms of the GNU General Public |
| ** License version 2, as published by the Free Software Foundation, and |
| ** may be copied, distributed, and modified under those terms. |
| ** |
| ** This program is distributed in the hope that it will be useful, |
| ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| ** GNU General Public License for more details. |
| */ |
| /* |
| * Virtual hardware for bridging the FUSE kernel module |
| * in the emulated OS and outside file system |
| */ |
| #include "migration/qemu-file.h" |
| #include "hw/android/goldfish/trace.h" |
| #include "hw/android/goldfish/vmem.h" |
| #include "sysemu/sysemu.h" |
| |
| /* Set to 1 to debug tracing */ |
| #define DEBUG 0 |
| |
| #if DEBUG |
| # define D(...) printf(__VA_ARGS__), fflush(stdout) |
| #else |
| # define D(...) ((void)0) |
| #endif |
| |
| /* Set to 1 to debug PID tracking */ |
| #define DEBUG_PID 0 |
| |
| #if DEBUG_PID |
| # define DPID(...) printf(__VA_ARGS__), fflush(stdout) |
| #else |
| # define DPID(...) ((void)0) |
| #endif |
| |
| // TODO(digit): Re-enable tracing some day? |
| #define tracing 0 |
| |
| extern void cpu_loop_exit(CPUState* cpu); |
| |
| extern const char *trace_filename; |
| |
| /* for execve */ |
| static char exec_path[CLIENT_PAGE_SIZE]; |
| static char exec_arg[CLIENT_PAGE_SIZE]; |
| static unsigned long vstart; // VM start |
| static unsigned long vend; // VM end |
| static unsigned long eoff; // offset in EXE file |
| static unsigned cmdlen; // cmdline length |
| static unsigned pid; // PID (really thread id) |
| static unsigned tgid; // thread group id (really process id) |
| static unsigned tid; // current thread id (same as pid, most of the time) |
| static unsigned long dsaddr; // dynamic symbol address |
| static unsigned long unmap_start; // start address to unmap |
| |
| /* for context switch */ |
| //static unsigned long cs_pid; // context switch PID |
| |
| /* I/O write */ |
| static void trace_dev_write(void *opaque, hwaddr offset, uint32_t value) |
| { |
| trace_dev_state *s = (trace_dev_state *)opaque; |
| |
| (void)s; |
| |
| switch (offset >> 2) { |
| case TRACE_DEV_REG_SWITCH: // context switch, switch to pid |
| DPID("QEMU.trace: context switch tid=%u\n", value); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, context switch %u\n", value); |
| } |
| tid = (unsigned) value; |
| break; |
| case TRACE_DEV_REG_TGID: // save the tgid for the following fork/clone |
| DPID("QEMU.trace: tgid=%u\n", value); |
| tgid = value; |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, tgid %u\n", value); |
| } |
| break; |
| case TRACE_DEV_REG_FORK: // fork, fork new pid |
| DPID("QEMU.trace: fork (pid=%d tgid=%d value=%d)\n", pid, tgid, value); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, fork %u\n", value); |
| } |
| break; |
| case TRACE_DEV_REG_CLONE: // fork, clone new pid (i.e. thread) |
| DPID("QEMU.trace: clone (pid=%d tgid=%d value=%d)\n", pid, tgid, value); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, clone %u\n", value); |
| } |
| break; |
| case TRACE_DEV_REG_EXECVE_VMSTART: // execve, vstart |
| vstart = value; |
| break; |
| case TRACE_DEV_REG_EXECVE_VMEND: // execve, vend |
| vend = value; |
| break; |
| case TRACE_DEV_REG_EXECVE_OFFSET: // execve, offset in EXE |
| eoff = value; |
| break; |
| case TRACE_DEV_REG_EXECVE_EXEPATH: // init exec, path of EXE |
| vstrcpy(value, exec_path, CLIENT_PAGE_SIZE); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, init exec [%lx,%lx]@%lx [%s]\n", |
| vstart, vend, eoff, exec_path); |
| } |
| exec_path[0] = 0; |
| break; |
| case TRACE_DEV_REG_CMDLINE_LEN: // execve, process cmdline length |
| cmdlen = value; |
| break; |
| case TRACE_DEV_REG_CMDLINE: // execve, process cmdline |
| safe_memory_rw_debug(current_cpu, value, (uint8_t*)exec_arg, cmdlen, 0); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, execve [%.*s]\n", cmdlen, exec_arg); |
| } |
| #if DEBUG || DEBUG_PID |
| if (trace_filename != NULL) { |
| int i; |
| for (i = 0; i < cmdlen; i ++) |
| if (i != cmdlen - 1 && exec_arg[i] == 0) |
| exec_arg[i] = ' '; |
| printf("QEMU.trace: kernel, execve %s[%d]\n", exec_arg, cmdlen); |
| exec_arg[0] = 0; |
| } |
| #endif |
| break; |
| case TRACE_DEV_REG_EXIT: // exit, exit current process with exit code |
| DPID("QEMU.trace: exit tid=%u\n", value); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, exit %x\n", value); |
| } |
| break; |
| case TRACE_DEV_REG_NAME: // record thread name |
| vstrcpy(value, exec_path, CLIENT_PAGE_SIZE); |
| DPID("QEMU.trace: thread name=%s\n", exec_path); |
| |
| // Remove the trailing newline if it exists |
| int len = strlen(exec_path); |
| if (exec_path[len - 1] == '\n') { |
| exec_path[len - 1] = 0; |
| } |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, name %s\n", exec_path); |
| } |
| break; |
| case TRACE_DEV_REG_MMAP_EXEPATH: // mmap, path of EXE, the others are same as execve |
| vstrcpy(value, exec_path, CLIENT_PAGE_SIZE); |
| DPID("QEMU.trace: mmap exe=%s\n", exec_path); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, mmap [%lx,%lx]@%lx [%s]\n", vstart, vend, eoff, exec_path); |
| } |
| exec_path[0] = 0; |
| break; |
| case TRACE_DEV_REG_INIT_PID: // init, name the pid that starts before device registered |
| pid = value; |
| DPID("QEMU.trace: pid=%d\n", value); |
| break; |
| case TRACE_DEV_REG_INIT_NAME: // init, the comm of the init pid |
| vstrcpy(value, exec_path, CLIENT_PAGE_SIZE); |
| DPID("QEMU.trace: tgid=%d pid=%d name=%s\n", tgid, pid, exec_path); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: kernel, init name %u [%s]\n", pid, exec_path); |
| } |
| exec_path[0] = 0; |
| break; |
| |
| case TRACE_DEV_REG_DYN_SYM_ADDR: // dynamic symbol address |
| dsaddr = value; |
| break; |
| case TRACE_DEV_REG_DYN_SYM: // add dynamic symbol |
| vstrcpy(value, exec_arg, CLIENT_PAGE_SIZE); |
| if (trace_filename != NULL) { |
| D("QEMU.trace: dynamic symbol %lx:%s\n", dsaddr, exec_arg); |
| } |
| exec_arg[0] = 0; |
| break; |
| case TRACE_DEV_REG_REMOVE_ADDR: // remove dynamic symbol addr |
| if (trace_filename != NULL) { |
| D("QEMU.trace: dynamic symbol remove %lx\n", dsaddr); |
| } |
| break; |
| |
| case TRACE_DEV_REG_PRINT_STR: // print string |
| vstrcpy(value, exec_arg, CLIENT_PAGE_SIZE); |
| printf("%s", exec_arg); |
| exec_arg[0] = 0; |
| break; |
| case TRACE_DEV_REG_PRINT_NUM_DEC: // print number in decimal |
| printf("%d", value); |
| break; |
| case TRACE_DEV_REG_PRINT_NUM_HEX: // print number in hexical |
| printf("%x", value); |
| break; |
| |
| case TRACE_DEV_REG_STOP_EMU: // stop the VM execution |
| current_cpu->exception_index = EXCP_HLT; |
| current_cpu->halted = 1; |
| qemu_system_shutdown_request(); |
| cpu_loop_exit(current_cpu); |
| break; |
| |
| case TRACE_DEV_REG_ENABLE: // tracing enable: 0 = stop, 1 = start |
| break; |
| |
| case TRACE_DEV_REG_UNMAP_START: |
| unmap_start = value; |
| break; |
| case TRACE_DEV_REG_UNMAP_END: |
| break; |
| |
| case TRACE_DEV_REG_METHOD_ENTRY: |
| case TRACE_DEV_REG_METHOD_EXIT: |
| case TRACE_DEV_REG_METHOD_EXCEPTION: |
| case TRACE_DEV_REG_NATIVE_ENTRY: |
| case TRACE_DEV_REG_NATIVE_EXIT: |
| case TRACE_DEV_REG_NATIVE_EXCEPTION: |
| if (trace_filename != NULL) { |
| if (tracing) { |
| int __attribute__((unused)) call_type = (offset - 4096) >> 2; |
| //trace_interpreted_method(value, call_type); |
| } |
| } |
| break; |
| |
| default: |
| if (offset < 4096) { |
| cpu_abort(current_cpu, |
| "trace_dev_write: Bad offset %" HWADDR_PRIx "\n", |
| offset); |
| } else { |
| D("%s: offset=%d (0x%x) value=%d (0x%x)\n", __FUNCTION__, offset, |
| offset, value, value); |
| } |
| break; |
| } |
| } |
| |
| /* I/O read */ |
| static uint32_t trace_dev_read(void *opaque, hwaddr offset) |
| { |
| trace_dev_state *s = (trace_dev_state *)opaque; |
| |
| (void)s; |
| |
| switch (offset >> 2) { |
| case TRACE_DEV_REG_ENABLE: // tracing enable |
| return tracing; |
| |
| default: |
| if (offset < 4096) { |
| cpu_abort(current_cpu, |
| "trace_dev_read: Bad offset %" HWADDR_PRIx "\n", |
| offset); |
| } else { |
| D("%s: offset=%d (0x%x)\n", __FUNCTION__, offset, offset); |
| } |
| return 0; |
| } |
| return 0; |
| } |
| |
| static CPUReadMemoryFunc *trace_dev_readfn[] = { |
| trace_dev_read, |
| trace_dev_read, |
| trace_dev_read |
| }; |
| |
| static CPUWriteMemoryFunc *trace_dev_writefn[] = { |
| trace_dev_write, |
| trace_dev_write, |
| trace_dev_write |
| }; |
| |
| /* initialize the trace device */ |
| void trace_dev_init() |
| { |
| trace_dev_state *s; |
| |
| s = (trace_dev_state *)g_malloc0(sizeof(trace_dev_state)); |
| s->dev.name = "qemu_trace"; |
| s->dev.id = -1; |
| s->dev.base = 0; // will be allocated dynamically |
| s->dev.size = 0x2000; |
| s->dev.irq = 0; |
| s->dev.irq_count = 0; |
| |
| goldfish_device_add(&s->dev, trace_dev_readfn, trace_dev_writefn, s); |
| |
| exec_path[0] = exec_arg[0] = '\0'; |
| } |
