Calculate library size (M_LRS column) from maps file

Process.h

@@ -9,6 +9,8 @@ in the source distribution for its full text.
 */
 
 #include <stdbool.h>
+#include <stdint.h>
+#include <unistd.h>
 #include <sys/types.h>
 
 #include "Object.h"
@@ -113,7 +115,7 @@ typedef struct ProcessFieldData_ {
    const char* name;
    const char* title;
    const char* description;
-   int flags;
+   uint32_t flags;
 } ProcessFieldData;
 
 // Implemented in platform-specific code:

Settings.c

@@ -90,7 +90,7 @@ static void Settings_defaultMeters(Settings* this, int initialCpuCount) {
    this->columns[1].modes[r++] = TEXT_METERMODE;
 }
 
-static void readFields(ProcessField* fields, int* flags, const char* line) {
+static void readFields(ProcessField* fields, uint32_t* flags, const char* line) {
    char* trim = String_trim(line);
    char** ids = String_split(trim, ' ', NULL);
    free(trim);

Settings.h

@@ -27,7 +27,7 @@ typedef struct Settings_ {
    MeterColumnSettings columns[2];
 
    ProcessField* fields;
-   int flags;
+   uint32_t flags;
    int colorScheme;
    int delay;
 

linux/LinuxProcess.c

@@ -73,7 +73,7 @@ ProcessFieldData Process_fields[] = {
    [M_SHARE] = { .name = "M_SHARE", .title = "  SHR ", .description = "Size of the process's shared pages", .flags = 0, },
    [M_TRS] = { .name = "M_TRS", .title = " CODE ", .description = "Size of the text segment of the process", .flags = 0, },
    [M_DRS] = { .name = "M_DRS", .title = " DATA ", .description = "Size of the data segment plus stack usage of the process", .flags = 0, },
-   [M_LRS] = { .name = "M_LRS", .title = " LIB ", .description = "The library size of the process (unused since Linux 2.6; always 0)", .flags = 0, },
+   [M_LRS] = { .name = "M_LRS", .title = "  LIB ", .description = "The library size of the process (calculated from memory maps)", .flags = PROCESS_FLAG_LINUX_LRS_FIX, },
    [M_DT] = { .name = "M_DT", .title = " DIRTY ", .description = "Size of the dirty pages of the process (unused since Linux 2.6; always 0)", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },

linux/LinuxProcess.h

@@ -19,14 +19,15 @@ in the source distribution for its full text.
 #include "Settings.h"
 
 
-#define PROCESS_FLAG_LINUX_IOPRIO   0x0100
-#define PROCESS_FLAG_LINUX_OPENVZ   0x0200
-#define PROCESS_FLAG_LINUX_VSERVER  0x0400
-#define PROCESS_FLAG_LINUX_CGROUP   0x0800
-#define PROCESS_FLAG_LINUX_OOM      0x1000
-#define PROCESS_FLAG_LINUX_SMAPS    0x2000
-#define PROCESS_FLAG_LINUX_CTXT     0x4000
-#define PROCESS_FLAG_LINUX_SECATTR  0x8000
+#define PROCESS_FLAG_LINUX_IOPRIO   0x00000100
+#define PROCESS_FLAG_LINUX_OPENVZ   0x00000200
+#define PROCESS_FLAG_LINUX_VSERVER  0x00000400
+#define PROCESS_FLAG_LINUX_CGROUP   0x00000800
+#define PROCESS_FLAG_LINUX_OOM      0x00001000
+#define PROCESS_FLAG_LINUX_SMAPS    0x00002000
+#define PROCESS_FLAG_LINUX_CTXT     0x00004000
+#define PROCESS_FLAG_LINUX_SECATTR  0x00008000
+#define PROCESS_FLAG_LINUX_LRS_FIX  0x00010000
 
 typedef enum UnsupportedProcessFields {
    FLAGS = 9,

linux/LinuxProcessList.c

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <inttypes.h>
 #include <math.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -23,6 +24,7 @@ in the source distribution for its full text.
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/utsname.h>
 
 #ifdef HAVE_DELAYACCT
 #include <linux/netlink.h>
@@ -479,7 +481,74 @@ static void LinuxProcessList_readIoFile(LinuxProcess* process, const char* dirna
    }
 }
 
-static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* dirname, const char* name) {
+typedef struct LibraryData {
+    uint64_t size;
+    bool exec;
+} LibraryData;
+
+static void LinuxProcessList_calcLibSize_helper(ATTR_UNUSED hkey_t key, void* value, void* data) {
+   if (!data)
+      return;
+
+   if (!value)
+      return;
+
+   LibraryData* v = (LibraryData *)value;
+   uint64_t* d = (uint64_t *)data;
+   if (!v->exec)
+      return;
+
+   *d += v->size;
+}
+
+static uint64_t LinuxProcessList_calcLibSize(const char* dirname, const char* name) {
+   char filename[MAX_NAME+1];
+   xSnprintf(filename, sizeof(filename), "%s/%s/maps", dirname, name);
+   FILE* mapsfile = fopen(filename, "r");
+   if (!mapsfile)
+      return 0;
+
+   Hashtable* ht = Hashtable_new(64, true);
+
+   char buffer[1024];
+   while (fgets(buffer, sizeof(buffer), mapsfile)) {
+      uint64_t map_start;
+      uint64_t map_end;
+      char map_perm[16];
+      uint32_t map_dummy;
+      int map_devmaj;
+      int map_devmin;
+      uint64_t map_inode;
+
+      if (7 != sscanf(buffer, "%"PRIx64"-%"PRIx64" %4s %"PRIx32" %d:%d %" PRIu64,
+         &map_start, &map_end, map_perm, &map_dummy,
+         &map_devmaj, &map_devmin, &map_inode))
+         continue;
+
+      if (!map_inode)
+         continue;
+
+      LibraryData * libdata;
+      libdata = Hashtable_get(ht, map_inode);
+      if (!libdata) {
+         libdata = xCalloc(1, sizeof(LibraryData));
+         Hashtable_put(ht, map_inode, libdata);
+      }
+
+      libdata->size += map_end - map_start;
+      libdata->exec |= 'x' == map_perm[2];
+   }
+
+   uint64_t total_size = 0;
+   Hashtable_foreach(ht, LinuxProcessList_calcLibSize_helper, &total_size);
+
+   Hashtable_delete(ht);
+
+   fclose(mapsfile);
+   return total_size / CRT_pageSize;
+}
+
+static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* dirname, const char* name, bool performLookup) {
    char filename[MAX_NAME + 1];
    xSnprintf(filename, sizeof(filename), "%s/%s/statm", dirname, name);
    FILE* statmfile = fopen(filename, "r");
@@ -495,6 +564,9 @@ static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* di
                   &process->m_drs,
                   &process->m_dt);
    fclose(statmfile);
+   if (r == 7 && !process->m_lrs && performLookup) {
+      process->m_lrs = LinuxProcessList_calcLibSize(dirname, name);
+   }
    return r == 7;
 }
 
@@ -1193,7 +1265,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, const char*
       if (settings->flags & PROCESS_FLAG_IO)
          LinuxProcessList_readIoFile(lp, dirname, name, now);
 
-      if (! LinuxProcessList_readStatmFile(lp, dirname, name))
+      if (!LinuxProcessList_readStatmFile(lp, dirname, name, !!(settings->flags & PROCESS_FLAG_LINUX_LRS_FIX)))
          goto errorReadingProcess;
 
       if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {