1 --- COMPILING 2 3 This project has begun being ported to Windows. A working solution 4 file exists in this directory: 5 gperftools.sln 6 7 You can load this solution file into VC++ 7.1 (Visual Studio 2003) or 8 later -- in the latter case, it will automatically convert the files 9 to the latest format for you. 10 11 When you build the solution, it will create a number of unittests, 12 which you can run by hand (or, more easily, under the Visual Studio 13 debugger) to make sure everything is working properly on your system. 14 The binaries will end up in a directory called "debug" or "release" in 15 the top-level directory (next to the .sln file). It will also create 16 two binaries, nm-pdb and addr2line-pdb, which you should install in 17 the same directory you install the 'pprof' perl script. 18 19 I don't know very much about how to install DLLs on Windows, so you'll 20 have to figure out that part for yourself. If you choose to just 21 re-use the existing .sln, make sure you set the IncludeDir's 22 appropriately! Look at the properties for libtcmalloc_minimal.dll. 23 24 Note that these systems are set to build in Debug mode by default. 25 You may want to change them to Release mode. 26 27 To use tcmalloc_minimal in your own projects, you should only need to 28 build the dll and install it someplace, so you can link it into 29 further binaries. To use the dll, you need to add the following to 30 the linker line of your executable: 31 "libtcmalloc_minimal.lib" /INCLUDE:"__tcmalloc" 32 33 Here is how to accomplish this in Visual Studio 2005 (VC8): 34 35 1) Have your executable depend on the tcmalloc library by selecting 36 "Project Dependencies..." from the "Project" menu. Your executable 37 should depend on "libtcmalloc_minimal". 38 39 2) Have your executable depend on a tcmalloc symbol -- this is 40 necessary so the linker doesn't "optimize out" the libtcmalloc 41 dependency -- by right-clicking on your executable's project (in 42 the solution explorer), selecting Properties from the pull-down 43 menu, then selecting "Configuration Properties" -> "Linker" -> 44 "Input". Then, in the "Force Symbol References" field, enter the 45 text "__tcmalloc" (without the quotes). Be sure to do this for both 46 debug and release modes! 47 48 You can also link tcmalloc code in statically -- see the example 49 project tcmalloc_minimal_unittest-static, which does this. For this 50 to work, you'll need to add "/D PERFTOOLS_DLL_DECL=" to the compile 51 line of every perftools .cc file. You do not need to depend on the 52 tcmalloc symbol in this case (that is, you don't need to do either 53 step 1 or step 2 from above). 54 55 An alternative to all the above is to statically link your application 56 with libc, and then replace its malloc with tcmalloc. This allows you 57 to just build and link your program normally; the tcmalloc support 58 comes in a post-processing step. This is more reliable than the above 59 technique (which depends on run-time patching, which is inherently 60 fragile), though more work to set up. For details, see 61 https://groups.google.com/group/google-perftools/browse_thread/thread/41cd3710af85e57b 62 63 64 --- THE HEAP-PROFILER 65 66 The heap-profiler has had a preliminary port to Windows. It has not 67 been well tested, and probably does not work at all when Frame Pointer 68 Optimization (FPO) is enabled -- that is, in release mode. The other 69 features of perftools, such as the cpu-profiler and leak-checker, have 70 not yet been ported to Windows at all. 71 72 73 --- WIN64 74 75 The function-patcher has to disassemble code, and is very 76 x86-specific. However, the rest of perftools should work fine for 77 both x86 and x64. In particular, if you use the 'statically link with 78 libc, and replace its malloc with tcmalloc' approach, mentioned above, 79 it should be possible to use tcmalloc with 64-bit windows. 80 81 As of perftools 1.10, there is some support for disassembling x86_64 82 instructions, for work with win64. This work is preliminary, but the 83 test file preamble_patcher_test.cc is provided to play around with 84 that a bit. preamble_patcher_test will not compile on win32. 85 86 87 --- ISSUES 88 89 NOTE FOR WIN2K USERS: According to reports 90 (http://code.google.com/p/gperftools/issues/detail?id=127) 91 the stack-tracing necessary for the heap-profiler does not work on 92 Win2K. The best workaround is, if you are building on a Win2k system 93 is to add "/D NO_TCMALLOC_SAMPLES=" to your build, to turn off the 94 stack-tracing. You will not be able to use the heap-profiler if you 95 do this. 96 97 NOTE ON _MSIZE and _RECALLOC: The tcmalloc version of _msize returns 98 the size of the region tcmalloc allocated for you -- which is at least 99 as many bytes you asked for, but may be more. (btw, these *are* bytes 100 you own, even if you didn't ask for all of them, so it's correct code 101 to access all of them if you want.) Unfortunately, the Windows CRT 102 _recalloc() routine assumes that _msize returns exactly as many bytes 103 as were requested. As a result, _recalloc() may not zero out new 104 bytes correctly. IT'S SAFEST NOT TO USE _RECALLOC WITH TCMALLOC. 105 _recalloc() is a tricky routine to use in any case (it's not safe to 106 use with realloc, for instance). 107 108 109 I have little experience with Windows programming, so there may be 110 better ways to set this up than I've done! If you run across any 111 problems, please post to the google-perftools Google Group, or report 112 them on the gperftools Google Code site: 113 http://groups.google.com/group/google-perftools 114 http://code.google.com/p/gperftools/issues/list 115 116 -- craig 117 118 Last modified: 2 February 2012 119
