275 lines
7.4 KiB
C++
275 lines
7.4 KiB
C++
/*
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www.sourceforge.net/projects/dfhack
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Copyright (c) 2009 Petr Mrázek (peterix), Kenneth Ferland (Impaler[WrG]), dorf
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#include "Internal.h"
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#include "PlatformInternal.h"
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#include <string>
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#include <vector>
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#include <map>
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#include <cstdio>
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#include <cstring>
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#include <fstream>
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using namespace std;
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#include "LinuxProcess.h"
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#include "ProcessFactory.h"
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#include "MicrosoftSTL.h"
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#include "dfhack/VersionInfo.h"
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#include "dfhack/DFError.h"
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using namespace DFHack;
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#include <errno.h>
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#include <sys/ptrace.h>
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#include <md5wrapper.h>
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namespace {
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class WineProcess : public LinuxProcessBase
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{
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private:
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uint8_t vector_start;
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MicrosoftSTL stl;
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public:
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WineProcess(uint32_t pid, VersionInfoFactory * factory);
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~WineProcess()
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{
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if(attached)
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{
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detach();
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}
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}
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bool attach();
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bool detach();
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bool suspend();
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bool asyncSuspend();
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bool resume();
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bool forceresume();
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void readSTLVector(const uint32_t address, t_vecTriplet & triplet);
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const std::string readSTLString (uint32_t offset);
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size_t readSTLString (uint32_t offset, char * buffer, size_t bufcapacity);
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size_t writeSTLString(const uint32_t address, const std::string writeString);
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// get class name of an object with rtti/type info
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std::string doReadClassName(uint32_t vptr);
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};
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}
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Process* DFHack::createWineProcess(uint32_t pid, VersionInfoFactory * factory)
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{
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return new WineProcess(pid, factory);
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}
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WineProcess::WineProcess(uint32_t pid, VersionInfoFactory * factory) : LinuxProcessBase(pid)
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{
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char dir_name [256];
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char exe_link_name [256];
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char mem_name [256];
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char cwd_name [256];
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char cmdline_name [256];
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char target_name[1024];
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int target_result;
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identified = false;
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my_descriptor = 0;
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sprintf(dir_name,"/proc/%d/", pid);
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sprintf(exe_link_name,"/proc/%d/exe", pid);
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sprintf(mem_name,"/proc/%d/mem", pid);
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memFile = mem_name;
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sprintf(cwd_name,"/proc/%d/cwd", pid);
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sprintf(cmdline_name,"/proc/%d/cmdline", pid);
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// resolve /proc/PID/exe link
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target_result = readlink(exe_link_name, target_name, sizeof(target_name)-1);
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if (target_result == -1)
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{
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return;
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}
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// make sure we have a null terminated string...
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target_name[target_result] = 0;
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// FIXME: this fails when the wine process isn't started from the 'current working directory'. strip path data from cmdline
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// is this windows version of Df running in wine?
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if(strstr(target_name, "wine-preloader")!= NULL)
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{
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// get working directory
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target_result = readlink(cwd_name, target_name, sizeof(target_name)-1);
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target_name[target_result] = 0;
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// got path to executable, do the same for its name
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ifstream ifs ( cmdline_name , ifstream::in );
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string cmdline;
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getline(ifs,cmdline);
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if (cmdline.find("dwarfort-w.exe") != string::npos || cmdline.find("dwarfort.exe") != string::npos || cmdline.find("Dwarf Fortress.exe") != string::npos)
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{
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char exe_link[1024];
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// put executable name and path together
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sprintf(exe_link,"%s/%s",target_name,cmdline.c_str());
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md5wrapper md5;
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// get hash of the running DF process
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string hash = md5.getHashFromFile(exe_link);
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// create linux process, add it to the vector
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VersionInfo * vinfo = factory->getVersionInfoByMD5(hash);
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if(vinfo)
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{
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my_descriptor = new VersionInfo(*vinfo);
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my_descriptor->setParentProcess(this);
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vector_start = my_descriptor->getGroup("vector")->getOffset("start");
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stl.init(this);
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identified = true;
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}
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return;
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}
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}
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}
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void WineProcess::readSTLVector(const uint32_t address, t_vecTriplet & triplet)
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{
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read(address + vector_start, sizeof(triplet), (uint8_t *) &triplet);
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}
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size_t WineProcess::readSTLString (uint32_t offset, char * buffer, size_t bufcapacity)
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{
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return stl.readSTLString(offset, buffer, bufcapacity);
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}
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size_t WineProcess::writeSTLString(const uint32_t address, const std::string writeString)
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{
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return stl.writeSTLString(address,writeString);
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}
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const string WineProcess::readSTLString (uint32_t offset)
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{
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return stl.readSTLString(offset);
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}
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string WineProcess::doReadClassName (uint32_t vptr)
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{
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return stl.readClassName(vptr);
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}
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bool WineProcess::asyncSuspend()
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{
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return suspend();
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}
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bool WineProcess::suspend()
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{
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int status;
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if(suspended)
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return true;
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// can we attach?
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if (ptrace(PTRACE_ATTACH , my_pid, NULL, NULL) == -1)
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{
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// no, we got an error
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perror("ptrace attach error");
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cerr << "attach failed on pid " << my_pid << endl;
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return false;
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}
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while(true)
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{
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// we wait on the pid
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pid_t w = waitpid(my_pid, &status, 0);
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if (w == -1)
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{
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// child died
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perror("wait inside attach()");
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return false;
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}
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// stopped -> let's continue
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if (WIFSTOPPED(status))
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{
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break;
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}
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}
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int proc_pid_mem = open(memFile.c_str(),O_RDONLY);
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if(proc_pid_mem == -1)
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{
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ptrace(PTRACE_DETACH, my_pid, NULL, NULL);
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cerr << memFile << endl;
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cerr << "couldn't open /proc/" << my_pid << "/mem" << endl;
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perror("open(memFile.c_str(),O_RDONLY)");
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return false;
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}
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else
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{
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attached = suspended = true;
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memFileHandle = proc_pid_mem;
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return true; // we are attached
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}
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}
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bool WineProcess::forceresume()
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{
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return resume();
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}
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bool WineProcess::resume()
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{
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if(!suspended)
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return true;
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int result = 0;
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// close /proc/PID/mem
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result = close(memFileHandle);
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if(result == -1)
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{
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cerr << "couldn't close /proc/"<< my_pid <<"/mem" << endl;
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perror("mem file close");
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return false;
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}
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else
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{
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// detach
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result = ptrace(PTRACE_DETACH, my_pid, NULL, NULL);
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if(result == -1)
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{
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cerr << "couldn't detach from process pid" << my_pid << endl;
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perror("ptrace detach");
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return false;
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}
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else
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{
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attached = suspended = false;
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return true;
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}
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}
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}
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bool WineProcess::attach()
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{
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if(suspended) return true;
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return suspend();
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}
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bool WineProcess::detach()
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{
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if(!suspended) return true;
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return resume();
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}
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