X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/b690bb1364b1e7002e9a5c4e920c5d3d132b961d..ea1979038ff351519752688afc00416a6fb83929:/src/xbt/memory_map.cpp diff --git a/src/xbt/memory_map.cpp b/src/xbt/memory_map.cpp index d43a9b68f4..43ce328624 100644 --- a/src/xbt/memory_map.cpp +++ b/src/xbt/memory_map.cpp @@ -1,23 +1,25 @@ -/* Copyright (c) 2008-2015. The SimGrid Team. - * All rights reserved. */ +/* Copyright (c) 2008-2019. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -#include #include +#include #include +#include +#include +#include #include #if defined __APPLE__ +# include # include # include # include # include # include # include -# include # if __MAC_OS_X_VERSION_MIN_REQUIRED < 1050 # define mach_vm_address_t vm_address_t # define mach_vm_size_t vm_size_t @@ -44,27 +46,20 @@ # include #endif -#include -#include -#include -#include +#include #include "memory_map.hpp" -extern "C" { -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_memory_map, xbt, "Logging specific to algorithms for memory_map"); -} - namespace simgrid { namespace xbt { /** * \todo This function contains many cases that do not allow for a - * recovery. Currently, xbt_abort() is called but we should + * recovery. Currently, abort() is called but we should * much rather die with the specific reason so that it's easier * to find out what's going on. */ -XBT_PRIVATE std::vector get_memory_map(pid_t pid) +std::vector get_memory_map(pid_t pid) { std::vector ret; #if defined __APPLE__ @@ -73,7 +68,8 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) /* Request authorization to read mappings */ if (task_for_pid(mach_task_self(), pid, &map) != KERN_SUCCESS) { std::perror("task_for_pid failed"); - xbt_die("Cannot request authorization for kernel information access"); + std::fprintf(stderr, "Cannot request authorization for kernel information access\n"); + abort(); } /* @@ -109,7 +105,8 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) } else if (kr != KERN_SUCCESS) { std::perror("mach_vm_region failed"); - xbt_die("Cannot request authorization for kernel information access"); + std::fprintf(stderr, "Cannot request authorization for kernel information access\n"); + abort(); } VmMap memreg; @@ -128,6 +125,7 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) memreg.prot |= PROT_EXEC; /* Private (copy-on-write) or shared? */ + memreg.flags = 0; if (info.shared) memreg.flags |= MAP_SHARED; else @@ -144,20 +142,14 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) memreg.inode = 0; /* Path */ - char path[MAXPATHLEN]; - int pathlen; - pathlen = proc_regionfilename(pid, address, path, sizeof(path)); - path[pathlen] = '\0'; - memreg.pathname = path; - -#if 0 /* Display mappings for debug */ - fprintf(stderr, - "%#014llx - %#014llx | %c%c%c | %s\n", - memreg.start_addr, memreg.end_addr, - (memreg.prot & PROT_READ) ? 'r' : '-', - (memreg.prot & PROT_WRITE) ? 'w' : '-', - (memreg.prot & PROT_EXEC) ? 'x' : '-', - memreg.pathname.c_str()); + Dl_info dlinfo; + if (dladdr(reinterpret_cast(address), &dlinfo)) + memreg.pathname = dlinfo.dli_fname; + +#if 0 /* debug */ + std::fprintf(stderr, "Region: %016" PRIx64 "-%016" PRIx64 " | %c%c%c | %s\n", memreg.start_addr, memreg.end_addr, + (memreg.prot & PROT_READ) ? 'r' : '-', (memreg.prot & PROT_WRITE) ? 'w' : '-', + (memreg.prot & PROT_EXEC) ? 'x' : '-', memreg.pathname.c_str()); #endif ret.push_back(std::move(memreg)); @@ -168,71 +160,71 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) #elif defined __linux__ /* Open the actual process's proc maps file and create the memory_map_t */ /* to be returned. */ - char* path = bprintf("/proc/%i/maps", (int) pid); - FILE *fp = std::fopen(path, "r"); - if (fp == nullptr) { - std::perror("fopen failed"); - xbt_die("Cannot open %s to investigate the memory map of the process.", path); + std::string path = std::string("/proc/") + std::to_string(pid) + "/maps"; + std::ifstream fp; + fp.rdbuf()->pubsetbuf(0, 0); + fp.open(path); + if (not fp) { + std::perror("open failed"); + std::fprintf(stderr, "Cannot open %s to investigate the memory map of the process.\n", path.c_str()); + abort(); } - free(path); - setbuf(fp, nullptr); /* Read one line at the time, parse it and add it to the memory map to be returned */ - ssize_t read; /* Number of bytes readed */ - char* line = nullptr; - std::size_t n = 0; /* Amount of bytes to read by xbt_getline */ - while ((read = xbt_getline(&line, &n, fp)) != -1) { + std::string sline; + while (std::getline(fp, sline)) { /** * The lines that we read have this format: (This is just an example) * 00602000-00603000 rw-p 00002000 00:28 1837264 */ - - //fprintf(stderr,"%s", line); - - /* Wipeout the new line character */ - line[read - 1] = '\0'; + char* line = &sline[0]; /* Tokenize the line using spaces as delimiters and store each token in lfields array. We expect 5 tokens for 6 fields */ + char* saveptr = nullptr; // for strtok_r() char* lfields[6]; - lfields[0] = strtok(line, " "); + lfields[0] = strtok_r(line, " ", &saveptr); int i; for (i = 1; i < 6 && lfields[i - 1] != nullptr; i++) { - lfields[i] = std::strtok(nullptr, " "); + lfields[i] = strtok_r(nullptr, " ", &saveptr); } /* Check to see if we got the expected amount of columns */ - if (i < 6) - xbt_die("The memory map apparently only supplied less than 6 columns. Recovery impossible."); + if (i < 6) { + std::fprintf(stderr, "The memory map apparently only supplied less than 6 columns. Recovery impossible.\n"); + abort(); + } /* Ok we are good enough to try to get the info we need */ /* First get the start and the end address of the map */ - char *tok = std::strtok(lfields[0], "-"); - if (tok == nullptr) - xbt_die("Start and end address of the map are not concatenated by a hyphen (-). Recovery impossible."); + char* tok = strtok_r(lfields[0], "-", &saveptr); + if (tok == nullptr) { + std::fprintf(stderr, + "Start and end address of the map are not concatenated by a hyphen (-). Recovery impossible.\n"); + abort(); + } VmMap memreg; char *endptr; memreg.start_addr = std::strtoull(tok, &endptr, 16); /* Make sure that the entire string was an hex number */ if (*endptr != '\0') - xbt_abort(); + abort(); - tok = std::strtok(nullptr, "-"); + tok = strtok_r(nullptr, "-", &saveptr); if (tok == nullptr) - xbt_abort(); + abort(); memreg.end_addr = std::strtoull(tok, &endptr, 16); /* Make sure that the entire string was an hex number */ if (*endptr != '\0') - xbt_abort(); + abort(); /* Get the permissions flags */ if (std::strlen(lfields[1]) < 4) - xbt_abort(); + abort(); memreg.prot = 0; - for (i = 0; i < 3; i++){ switch(lfields[1][i]){ case 'r': @@ -251,44 +243,47 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) if (memreg.prot == 0) memreg.prot |= PROT_NONE; + memreg.flags = 0; if (lfields[1][3] == 'p') { memreg.flags |= MAP_PRIVATE; } else { memreg.flags |= MAP_SHARED; if (lfields[1][3] != 's') - XBT_WARN("The protection is neither 'p' (private) nor 's' (shared) but '%s'. Let's assume shared, as on b0rken win-ubuntu systems.\nFull line: %s\n", - lfields[1], line); + fprintf(stderr, + "The protection is neither 'p' (private) nor 's' (shared) but '%s'. Let's assume shared, as on b0rken " + "win-ubuntu systems.\nFull line: %s\n", + lfields[1], line); } /* Get the offset value */ memreg.offset = std::strtoull(lfields[2], &endptr, 16); /* Make sure that the entire string was an hex number */ if (*endptr != '\0') - xbt_abort(); + abort(); /* Get the device major:minor bytes */ - tok = std::strtok(lfields[3], ":"); + tok = strtok_r(lfields[3], ":", &saveptr); if (tok == nullptr) - xbt_abort(); + abort(); memreg.dev_major = (char) strtoul(tok, &endptr, 16); /* Make sure that the entire string was an hex number */ if (*endptr != '\0') - xbt_abort(); + abort(); - tok = std::strtok(nullptr, ":"); + tok = strtok_r(nullptr, ":", &saveptr); if (tok == nullptr) - xbt_abort(); + abort(); memreg.dev_minor = (char) std::strtoul(tok, &endptr, 16); /* Make sure that the entire string was an hex number */ if (*endptr != '\0') - xbt_abort(); + abort(); /* Get the inode number and make sure that the entire string was a long int */ memreg.inode = strtoul(lfields[4], &endptr, 10); if (*endptr != '\0') - xbt_abort(); + abort(); /* And finally get the pathname */ if (lfields[5]) @@ -296,13 +291,12 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) /* Create space for a new map region in the region's array and copy the */ /* parsed stuff from the temporal memreg variable */ - XBT_DEBUG("Found region for %s", !memreg.pathname.empty() ? memreg.pathname.c_str() : "(null)"); + // std::fprintf(stderr, "Found region for %s\n", not memreg.pathname.empty() ? memreg.pathname.c_str() : "(null)"); ret.push_back(std::move(memreg)); } - std::free(line); - std::fclose(fp); + fp.close(); #elif defined __FreeBSD__ struct procstat *prstat; struct kinfo_proc *proc; @@ -311,15 +305,18 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) if ((prstat = procstat_open_sysctl()) == NULL) { std::perror("procstat_open_sysctl failed"); - xbt_die("Cannot access kernel state information"); + std::fprintf(stderr, "Cannot access kernel state information\n"); + abort(); } if ((proc = procstat_getprocs(prstat, KERN_PROC_PID, pid, &cnt)) == NULL) { std::perror("procstat_open_sysctl failed"); - xbt_die("Cannot access process information"); + std::fprintf(stderr, "Cannot access process information\n"); + abort(); } if ((vmentries = procstat_getvmmap(prstat, proc, &cnt)) == NULL) { std::perror("procstat_getvmmap failed"); - xbt_die("Cannot access process memory mappings"); + std::fprintf(stderr, "Cannot access process memory mappings\n"); + abort(); } for (unsigned int i = 0; i < cnt; i++) { VmMap memreg; @@ -338,6 +335,7 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) memreg.prot |= PROT_EXEC; /* Private (copy-on-write) or shared? */ + memreg.flags = 0; if (vmentries[i].kve_flags & KVME_FLAG_COW) memreg.flags |= MAP_PRIVATE; else @@ -360,9 +358,8 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) */ if (vmentries[i].kve_path[0] != '\0') memreg.pathname = vmentries[i].kve_path; - else if (vmentries[i].kve_type == KVME_TYPE_DEFAULT - && vmentries[i-1].kve_type == KVME_TYPE_VNODE - && vmentries[i-1].kve_path[0] != '\0') + else if (vmentries[i].kve_type == KVME_TYPE_DEFAULT && vmentries[i - 1].kve_type == KVME_TYPE_VNODE && + vmentries[i - 1].kve_path[0] != '\0') memreg.pathname = vmentries[i-1].kve_path; else if (vmentries[i].kve_type == KVME_TYPE_DEFAULT && vmentries[i].kve_flags & KVME_FLAG_GROWS_DOWN) @@ -374,8 +371,7 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) * later identifies mappings based on the permissions that are expected * when running the Linux kernel. */ - if (vmentries[i].kve_type == KVME_TYPE_VNODE - && ! (vmentries[i].kve_flags & KVME_FLAG_NEEDS_COPY)) + if (vmentries[i].kve_type == KVME_TYPE_VNODE && not(vmentries[i].kve_flags & KVME_FLAG_NEEDS_COPY)) memreg.prot &= ~PROT_WRITE; ret.push_back(std::move(memreg)); @@ -384,7 +380,8 @@ XBT_PRIVATE std::vector get_memory_map(pid_t pid) procstat_freeprocs(prstat, proc); procstat_close(prstat); #else - xbt_die("Could not get memory map from process %lli", (long long int) pid); + std::fprintf(stderr, "Could not get memory map from process %lli\n", (long long int)pid); + abort(); #endif return ret; }