--- a/hotspot/agent/src/os/bsd/ps_core.c Wed Mar 13 17:34:29 2013 -0400
+++ b/hotspot/agent/src/os/bsd/ps_core.c Thu Mar 14 00:33:08 2013 -0700
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -28,10 +28,11 @@
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
-#include <elf.h>
-#include <link.h>
#include "libproc_impl.h"
-#include "salibelf.h"
+
+#ifdef __APPLE__
+#include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h"
+#endif
// This file has the libproc implementation to read core files.
// For live processes, refer to ps_proc.c. Portions of this is adapted
@@ -41,156 +42,158 @@
// ps_prochandle cleanup helper functions
// close all file descriptors
-static void close_elf_files(struct ps_prochandle* ph) {
- lib_info* lib = NULL;
+static void close_files(struct ps_prochandle* ph) {
+ lib_info* lib = NULL;
+ // close core file descriptor
+ if (ph->core->core_fd >= 0)
+ close(ph->core->core_fd);
- // close core file descriptor
- if (ph->core->core_fd >= 0)
- close(ph->core->core_fd);
+ // close exec file descriptor
+ if (ph->core->exec_fd >= 0)
+ close(ph->core->exec_fd);
- // close exec file descriptor
- if (ph->core->exec_fd >= 0)
- close(ph->core->exec_fd);
+ // close interp file descriptor
+ if (ph->core->interp_fd >= 0)
+ close(ph->core->interp_fd);
- // close interp file descriptor
- if (ph->core->interp_fd >= 0)
- close(ph->core->interp_fd);
-
- // close class share archive file
- if (ph->core->classes_jsa_fd >= 0)
- close(ph->core->classes_jsa_fd);
+ // close class share archive file
+ if (ph->core->classes_jsa_fd >= 0)
+ close(ph->core->classes_jsa_fd);
- // close all library file descriptors
- lib = ph->libs;
- while (lib) {
- int fd = lib->fd;
- if (fd >= 0 && fd != ph->core->exec_fd) close(fd);
- lib = lib->next;
- }
+ // close all library file descriptors
+ lib = ph->libs;
+ while (lib) {
+ int fd = lib->fd;
+ if (fd >= 0 && fd != ph->core->exec_fd) {
+ close(fd);
+ }
+ lib = lib->next;
+ }
}
// clean all map_info stuff
static void destroy_map_info(struct ps_prochandle* ph) {
map_info* map = ph->core->maps;
while (map) {
- map_info* next = map->next;
- free(map);
- map = next;
+ map_info* next = map->next;
+ free(map);
+ map = next;
}
if (ph->core->map_array) {
- free(ph->core->map_array);
+ free(ph->core->map_array);
}
// Part of the class sharing workaround
map = ph->core->class_share_maps;
while (map) {
- map_info* next = map->next;
- free(map);
- map = next;
+ map_info* next = map->next;
+ free(map);
+ map = next;
}
}
// ps_prochandle operations
static void core_release(struct ps_prochandle* ph) {
- if (ph->core) {
- close_elf_files(ph);
- destroy_map_info(ph);
- free(ph->core);
- }
+ if (ph->core) {
+ close_files(ph);
+ destroy_map_info(ph);
+ free(ph->core);
+ }
}
static map_info* allocate_init_map(int fd, off_t offset, uintptr_t vaddr, size_t memsz) {
- map_info* map;
- if ( (map = (map_info*) calloc(1, sizeof(map_info))) == NULL) {
- print_debug("can't allocate memory for map_info\n");
- return NULL;
- }
+ map_info* map;
+ if ( (map = (map_info*) calloc(1, sizeof(map_info))) == NULL) {
+ print_debug("can't allocate memory for map_info\n");
+ return NULL;
+ }
- // initialize map
- map->fd = fd;
- map->offset = offset;
- map->vaddr = vaddr;
- map->memsz = memsz;
- return map;
+ // initialize map
+ map->fd = fd;
+ map->offset = offset;
+ map->vaddr = vaddr;
+ map->memsz = memsz;
+ return map;
}
// add map info with given fd, offset, vaddr and memsz
static map_info* add_map_info(struct ps_prochandle* ph, int fd, off_t offset,
uintptr_t vaddr, size_t memsz) {
- map_info* map;
- if ((map = allocate_init_map(fd, offset, vaddr, memsz)) == NULL) {
- return NULL;
- }
+ map_info* map;
+ if ((map = allocate_init_map(fd, offset, vaddr, memsz)) == NULL) {
+ return NULL;
+ }
- // add this to map list
- map->next = ph->core->maps;
- ph->core->maps = map;
- ph->core->num_maps++;
+ // add this to map list
+ map->next = ph->core->maps;
+ ph->core->maps = map;
+ ph->core->num_maps++;
- return map;
+ return map;
}
// Part of the class sharing workaround
static map_info* add_class_share_map_info(struct ps_prochandle* ph, off_t offset,
uintptr_t vaddr, size_t memsz) {
- map_info* map;
- if ((map = allocate_init_map(ph->core->classes_jsa_fd,
- offset, vaddr, memsz)) == NULL) {
- return NULL;
- }
+ map_info* map;
+ if ((map = allocate_init_map(ph->core->classes_jsa_fd,
+ offset, vaddr, memsz)) == NULL) {
+ return NULL;
+ }
- map->next = ph->core->class_share_maps;
- ph->core->class_share_maps = map;
- return map;
+ map->next = ph->core->class_share_maps;
+ ph->core->class_share_maps = map;
+ return map;
}
// Return the map_info for the given virtual address. We keep a sorted
// array of pointers in ph->map_array, so we can binary search.
static map_info* core_lookup(struct ps_prochandle *ph, uintptr_t addr)
{
- int mid, lo = 0, hi = ph->core->num_maps - 1;
- map_info *mp;
+ int mid, lo = 0, hi = ph->core->num_maps - 1;
+ map_info *mp;
- while (hi - lo > 1) {
- mid = (lo + hi) / 2;
- if (addr >= ph->core->map_array[mid]->vaddr)
- lo = mid;
- else
- hi = mid;
- }
+ while (hi - lo > 1) {
+ mid = (lo + hi) / 2;
+ if (addr >= ph->core->map_array[mid]->vaddr) {
+ lo = mid;
+ } else {
+ hi = mid;
+ }
+ }
- if (addr < ph->core->map_array[hi]->vaddr)
- mp = ph->core->map_array[lo];
- else
- mp = ph->core->map_array[hi];
+ if (addr < ph->core->map_array[hi]->vaddr) {
+ mp = ph->core->map_array[lo];
+ } else {
+ mp = ph->core->map_array[hi];
+ }
- if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz)
- return (mp);
+ if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) {
+ return (mp);
+ }
- // Part of the class sharing workaround
- // Unfortunately, we have no way of detecting -Xshare state.
- // Check out the share maps atlast, if we don't find anywhere.
- // This is done this way so to avoid reading share pages
- // ahead of other normal maps. For eg. with -Xshare:off we don't
- // want to prefer class sharing data to data from core.
- mp = ph->core->class_share_maps;
- if (mp) {
- print_debug("can't locate map_info at 0x%lx, trying class share maps\n",
- addr);
- }
- while (mp) {
- if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) {
- print_debug("located map_info at 0x%lx from class share maps\n",
- addr);
- return (mp);
- }
- mp = mp->next;
- }
+ // Part of the class sharing workaround
+ // Unfortunately, we have no way of detecting -Xshare state.
+ // Check out the share maps atlast, if we don't find anywhere.
+ // This is done this way so to avoid reading share pages
+ // ahead of other normal maps. For eg. with -Xshare:off we don't
+ // want to prefer class sharing data to data from core.
+ mp = ph->core->class_share_maps;
+ if (mp) {
+ print_debug("can't locate map_info at 0x%lx, trying class share maps\n", addr);
+ }
+ while (mp) {
+ if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) {
+ print_debug("located map_info at 0x%lx from class share maps\n", addr);
+ return (mp);
+ }
+ mp = mp->next;
+ }
- print_debug("can't locate map_info at 0x%lx\n", addr);
- return (NULL);
+ print_debug("can't locate map_info at 0x%lx\n", addr);
+ return (NULL);
}
//---------------------------------------------------------------
@@ -239,157 +242,171 @@
};
static bool read_jboolean(struct ps_prochandle* ph, uintptr_t addr, jboolean* pvalue) {
- jboolean i;
- if (ps_pread(ph, (psaddr_t) addr, &i, sizeof(i)) == PS_OK) {
- *pvalue = i;
- return true;
- } else {
- return false;
- }
+ jboolean i;
+ if (ps_pread(ph, (psaddr_t) addr, &i, sizeof(i)) == PS_OK) {
+ *pvalue = i;
+ return true;
+ } else {
+ return false;
+ }
}
static bool read_pointer(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* pvalue) {
- uintptr_t uip;
- if (ps_pread(ph, (psaddr_t) addr, &uip, sizeof(uip)) == PS_OK) {
- *pvalue = uip;
- return true;
- } else {
- return false;
- }
+ uintptr_t uip;
+ if (ps_pread(ph, (psaddr_t) addr, (char *)&uip, sizeof(uip)) == PS_OK) {
+ *pvalue = uip;
+ return true;
+ } else {
+ return false;
+ }
}
// used to read strings from debuggee
static bool read_string(struct ps_prochandle* ph, uintptr_t addr, char* buf, size_t size) {
- size_t i = 0;
- char c = ' ';
+ size_t i = 0;
+ char c = ' ';
- while (c != '\0') {
- if (ps_pread(ph, (psaddr_t) addr, &c, sizeof(char)) != PS_OK)
- return false;
- if (i < size - 1)
- buf[i] = c;
- else // smaller buffer
- return false;
- i++; addr++;
- }
-
- buf[i] = '\0';
- return true;
+ while (c != '\0') {
+ if (ps_pread(ph, (psaddr_t) addr, &c, sizeof(char)) != PS_OK) {
+ return false;
+ }
+ if (i < size - 1) {
+ buf[i] = c;
+ } else {
+ // smaller buffer
+ return false;
+ }
+ i++; addr++;
+ }
+ buf[i] = '\0';
+ return true;
}
+#ifdef __APPLE__
+#define USE_SHARED_SPACES_SYM "_UseSharedSpaces"
+// mangled name of Arguments::SharedArchivePath
+#define SHARED_ARCHIVE_PATH_SYM "_ZN9Arguments17SharedArchivePathE"
+#else
#define USE_SHARED_SPACES_SYM "UseSharedSpaces"
// mangled name of Arguments::SharedArchivePath
-#define SHARED_ARCHIVE_PATH_SYM "_ZN9Arguments17SharedArchivePathE"
+#define SHARED_ARCHIVE_PATH_SYM "__ZN9Arguments17SharedArchivePathE"
+#endif // __APPLE_
static bool init_classsharing_workaround(struct ps_prochandle* ph) {
- lib_info* lib = ph->libs;
- while (lib != NULL) {
- // we are iterating over shared objects from the core dump. look for
- // libjvm[_g].so.
- const char *jvm_name = 0;
- if ((jvm_name = strstr(lib->name, "/libjvm.so")) != 0 ||
- (jvm_name = strstr(lib->name, "/libjvm_g.so")) != 0) {
- char classes_jsa[PATH_MAX];
- struct FileMapHeader header;
- size_t n = 0;
- int fd = -1, m = 0;
- uintptr_t base = 0, useSharedSpacesAddr = 0;
- uintptr_t sharedArchivePathAddrAddr = 0, sharedArchivePathAddr = 0;
- jboolean useSharedSpaces = 0;
-
- memset(classes_jsa, 0, sizeof(classes_jsa));
- jvm_name = lib->name;
- useSharedSpacesAddr = lookup_symbol(ph, jvm_name, USE_SHARED_SPACES_SYM);
- if (useSharedSpacesAddr == 0) {
- print_debug("can't lookup 'UseSharedSpaces' flag\n");
- return false;
- }
+ int m;
+ size_t n;
+ lib_info* lib = ph->libs;
+ while (lib != NULL) {
+ // we are iterating over shared objects from the core dump. look for
+ // libjvm[_g].so.
+ const char *jvm_name = 0;
+#ifdef __APPLE__
+ if ((jvm_name = strstr(lib->name, "/libjvm.dylib")) != 0 ||
+ (jvm_name = strstr(lib->name, "/libjvm_g.dylib")) != 0)
+#else
+ if ((jvm_name = strstr(lib->name, "/libjvm.so")) != 0 ||
+ (jvm_name = strstr(lib->name, "/libjvm_g.so")) != 0)
+#endif // __APPLE__
+ {
+ char classes_jsa[PATH_MAX];
+ struct FileMapHeader header;
+ int fd = -1;
+ uintptr_t base = 0, useSharedSpacesAddr = 0;
+ uintptr_t sharedArchivePathAddrAddr = 0, sharedArchivePathAddr = 0;
+ jboolean useSharedSpaces = 0;
- // Hotspot vm types are not exported to build this library. So
- // using equivalent type jboolean to read the value of
- // UseSharedSpaces which is same as hotspot type "bool".
- if (read_jboolean(ph, useSharedSpacesAddr, &useSharedSpaces) != true) {
- print_debug("can't read the value of 'UseSharedSpaces' flag\n");
- return false;
- }
+ memset(classes_jsa, 0, sizeof(classes_jsa));
+ jvm_name = lib->name;
+ useSharedSpacesAddr = lookup_symbol(ph, jvm_name, USE_SHARED_SPACES_SYM);
+ if (useSharedSpacesAddr == 0) {
+ print_debug("can't lookup 'UseSharedSpaces' flag\n");
+ return false;
+ }
- if ((int)useSharedSpaces == 0) {
- print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
- return true;
- }
+ // Hotspot vm types are not exported to build this library. So
+ // using equivalent type jboolean to read the value of
+ // UseSharedSpaces which is same as hotspot type "bool".
+ if (read_jboolean(ph, useSharedSpacesAddr, &useSharedSpaces) != true) {
+ print_debug("can't read the value of 'UseSharedSpaces' flag\n");
+ return false;
+ }
- sharedArchivePathAddrAddr = lookup_symbol(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM);
- if (sharedArchivePathAddrAddr == 0) {
- print_debug("can't lookup shared archive path symbol\n");
- return false;
- }
+ if ((int)useSharedSpaces == 0) {
+ print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
+ return true;
+ }
- if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
- print_debug("can't read shared archive path pointer\n");
- return false;
- }
+ sharedArchivePathAddrAddr = lookup_symbol(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM);
+ if (sharedArchivePathAddrAddr == 0) {
+ print_debug("can't lookup shared archive path symbol\n");
+ return false;
+ }
- if (read_string(ph, sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
- print_debug("can't read shared archive path value\n");
- return false;
- }
+ if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
+ print_debug("can't read shared archive path pointer\n");
+ return false;
+ }
- print_debug("looking for %s\n", classes_jsa);
- // open the class sharing archive file
- fd = pathmap_open(classes_jsa);
- if (fd < 0) {
- print_debug("can't open %s!\n", classes_jsa);
- ph->core->classes_jsa_fd = -1;
- return false;
- } else {
- print_debug("opened %s\n", classes_jsa);
- }
+ if (read_string(ph, sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
+ print_debug("can't read shared archive path value\n");
+ return false;
+ }
- // read FileMapHeader from the file
- memset(&header, 0, sizeof(struct FileMapHeader));
- if ((n = read(fd, &header, sizeof(struct FileMapHeader)))
- != sizeof(struct FileMapHeader)) {
- print_debug("can't read shared archive file map header from %s\n", classes_jsa);
- close(fd);
- return false;
- }
+ print_debug("looking for %s\n", classes_jsa);
+ // open the class sharing archive file
+ fd = pathmap_open(classes_jsa);
+ if (fd < 0) {
+ print_debug("can't open %s!\n", classes_jsa);
+ ph->core->classes_jsa_fd = -1;
+ return false;
+ } else {
+ print_debug("opened %s\n", classes_jsa);
+ }
- // check file magic
- if (header._magic != 0xf00baba2) {
- print_debug("%s has bad shared archive file magic number 0x%x, expecing 0xf00baba2\n",
- classes_jsa, header._magic);
- close(fd);
- return false;
- }
+ // read FileMapHeader from the file
+ memset(&header, 0, sizeof(struct FileMapHeader));
+ if ((n = read(fd, &header, sizeof(struct FileMapHeader)))
+ != sizeof(struct FileMapHeader)) {
+ print_debug("can't read shared archive file map header from %s\n", classes_jsa);
+ close(fd);
+ return false;
+ }
- // check version
- if (header._version != CURRENT_ARCHIVE_VERSION) {
- print_debug("%s has wrong shared archive file version %d, expecting %d\n",
- classes_jsa, header._version, CURRENT_ARCHIVE_VERSION);
- close(fd);
- return false;
- }
+ // check file magic
+ if (header._magic != 0xf00baba2) {
+ print_debug("%s has bad shared archive file magic number 0x%x, expecing 0xf00baba2\n",
+ classes_jsa, header._magic);
+ close(fd);
+ return false;
+ }
+
+ // check version
+ if (header._version != CURRENT_ARCHIVE_VERSION) {
+ print_debug("%s has wrong shared archive file version %d, expecting %d\n",
+ classes_jsa, header._version, CURRENT_ARCHIVE_VERSION);
+ close(fd);
+ return false;
+ }
- ph->core->classes_jsa_fd = fd;
- // add read-only maps from classes[_g].jsa to the list of maps
- for (m = 0; m < NUM_SHARED_MAPS; m++) {
- if (header._space[m]._read_only) {
- base = (uintptr_t) header._space[m]._base;
- // no need to worry about the fractional pages at-the-end.
- // possible fractional pages are handled by core_read_data.
- add_class_share_map_info(ph, (off_t) header._space[m]._file_offset,
- base, (size_t) header._space[m]._used);
- print_debug("added a share archive map at 0x%lx\n", base);
- }
- }
- return true;
+ ph->core->classes_jsa_fd = fd;
+ // add read-only maps from classes[_g].jsa to the list of maps
+ for (m = 0; m < NUM_SHARED_MAPS; m++) {
+ if (header._space[m]._read_only) {
+ base = (uintptr_t) header._space[m]._base;
+ // no need to worry about the fractional pages at-the-end.
+ // possible fractional pages are handled by core_read_data.
+ add_class_share_map_info(ph, (off_t) header._space[m]._file_offset,
+ base, (size_t) header._space[m]._used);
+ print_debug("added a share archive map at 0x%lx\n", base);
+ }
}
- lib = lib->next;
- }
- return true;
+ return true;
+ }
+ lib = lib->next;
+ }
+ return true;
}
-
//---------------------------------------------------------------------------
// functions to handle map_info
@@ -397,54 +414,57 @@
// callback for sorting the array of map_info pointers.
static int core_cmp_mapping(const void *lhsp, const void *rhsp)
{
- const map_info *lhs = *((const map_info **)lhsp);
- const map_info *rhs = *((const map_info **)rhsp);
+ const map_info *lhs = *((const map_info **)lhsp);
+ const map_info *rhs = *((const map_info **)rhsp);
- if (lhs->vaddr == rhs->vaddr)
- return (0);
+ if (lhs->vaddr == rhs->vaddr) {
+ return (0);
+ }
- return (lhs->vaddr < rhs->vaddr ? -1 : 1);
+ return (lhs->vaddr < rhs->vaddr ? -1 : 1);
}
// we sort map_info by starting virtual address so that we can do
// binary search to read from an address.
static bool sort_map_array(struct ps_prochandle* ph) {
- size_t num_maps = ph->core->num_maps;
- map_info* map = ph->core->maps;
- int i = 0;
+ size_t num_maps = ph->core->num_maps;
+ map_info* map = ph->core->maps;
+ int i = 0;
- // allocate map_array
- map_info** array;
- if ( (array = (map_info**) malloc(sizeof(map_info*) * num_maps)) == NULL) {
- print_debug("can't allocate memory for map array\n");
- return false;
- }
+ // allocate map_array
+ map_info** array;
+ if ( (array = (map_info**) malloc(sizeof(map_info*) * num_maps)) == NULL) {
+ print_debug("can't allocate memory for map array\n");
+ return false;
+ }
- // add maps to array
- while (map) {
- array[i] = map;
- i++;
- map = map->next;
- }
+ // add maps to array
+ while (map) {
+ array[i] = map;
+ i++;
+ map = map->next;
+ }
- // sort is called twice. If this is second time, clear map array
- if (ph->core->map_array) free(ph->core->map_array);
- ph->core->map_array = array;
- // sort the map_info array by base virtual address.
- qsort(ph->core->map_array, ph->core->num_maps, sizeof (map_info*),
- core_cmp_mapping);
+ // sort is called twice. If this is second time, clear map array
+ if (ph->core->map_array) {
+ free(ph->core->map_array);
+ }
+ ph->core->map_array = array;
+ // sort the map_info array by base virtual address.
+ qsort(ph->core->map_array, ph->core->num_maps, sizeof (map_info*),
+ core_cmp_mapping);
- // print map
- if (is_debug()) {
- int j = 0;
- print_debug("---- sorted virtual address map ----\n");
- for (j = 0; j < ph->core->num_maps; j++) {
- print_debug("base = 0x%lx\tsize = %d\n", ph->core->map_array[j]->vaddr,
- ph->core->map_array[j]->memsz);
- }
- }
+ // print map
+ if (is_debug()) {
+ int j = 0;
+ print_debug("---- sorted virtual address map ----\n");
+ for (j = 0; j < ph->core->num_maps; j++) {
+ print_debug("base = 0x%lx\tsize = %d\n", ph->core->map_array[j]->vaddr,
+ ph->core->map_array[j]->memsz);
+ }
+ }
- return true;
+ return true;
}
#ifndef MIN
@@ -461,16 +481,18 @@
off_t off;
int fd;
- if (mp == NULL)
+ if (mp == NULL) {
break; /* No mapping for this address */
+ }
fd = mp->fd;
mapoff = addr - mp->vaddr;
len = MIN(resid, mp->memsz - mapoff);
off = mp->offset + mapoff;
- if ((len = pread(fd, buf, len, off)) <= 0)
+ if ((len = pread(fd, buf, len, off)) <= 0) {
break;
+ }
resid -= len;
addr += len;
@@ -507,8 +529,8 @@
static bool core_get_lwp_regs(struct ps_prochandle* ph, lwpid_t lwp_id,
struct reg* regs) {
- // for core we have cached the lwp regs from NOTE section
- thread_info* thr = ph->threads;
+ // for core we have cached the lwp regs after segment parsed
+ sa_thread_info* thr = ph->threads;
while (thr) {
if (thr->lwp_id == lwp_id) {
memcpy(regs, &thr->regs, sizeof(struct reg));
@@ -519,7 +541,7 @@
return false;
}
-static bool core_get_lwp_info(struct ps_prochandle *ph, lwpid_t lwp_id, void *linfo) {
+static bool core_get_lwp_info(struct ps_prochandle *ph, lwpid_t id, void *info) {
print_debug("core_get_lwp_info not implemented\n");
return false;
}
@@ -532,12 +554,451 @@
.get_lwp_info= core_get_lwp_info
};
-// read regs and create thread from NT_PRSTATUS entries from core file
+// from this point, mainly two blocks divided by def __APPLE__
+// one for Macosx, the other for regular Bsd
+
+#ifdef __APPLE__
+
+void print_thread(sa_thread_info *threadinfo) {
+ print_debug("thread added: %d\n", threadinfo->lwp_id);
+ print_debug("registers:\n");
+ print_debug(" r_r15: 0x%" PRIx64 "\n", threadinfo->regs.r_r15);
+ print_debug(" r_r14: 0x%" PRIx64 "\n", threadinfo->regs.r_r14);
+ print_debug(" r_r13: 0x%" PRIx64 "\n", threadinfo->regs.r_r13);
+ print_debug(" r_r12: 0x%" PRIx64 "\n", threadinfo->regs.r_r12);
+ print_debug(" r_r11: 0x%" PRIx64 "\n", threadinfo->regs.r_r11);
+ print_debug(" r_r10: 0x%" PRIx64 "\n", threadinfo->regs.r_r10);
+ print_debug(" r_r9: 0x%" PRIx64 "\n", threadinfo->regs.r_r9);
+ print_debug(" r_r8: 0x%" PRIx64 "\n", threadinfo->regs.r_r8);
+ print_debug(" r_rdi: 0x%" PRIx64 "\n", threadinfo->regs.r_rdi);
+ print_debug(" r_rsi: 0x%" PRIx64 "\n", threadinfo->regs.r_rsi);
+ print_debug(" r_rbp: 0x%" PRIx64 "\n", threadinfo->regs.r_rbp);
+ print_debug(" r_rbx: 0x%" PRIx64 "\n", threadinfo->regs.r_rbx);
+ print_debug(" r_rdx: 0x%" PRIx64 "\n", threadinfo->regs.r_rdx);
+ print_debug(" r_rcx: 0x%" PRIx64 "\n", threadinfo->regs.r_rcx);
+ print_debug(" r_rax: 0x%" PRIx64 "\n", threadinfo->regs.r_rax);
+ print_debug(" r_fs: 0x%" PRIx32 "\n", threadinfo->regs.r_fs);
+ print_debug(" r_gs: 0x%" PRIx32 "\n", threadinfo->regs.r_gs);
+ print_debug(" r_rip 0x%" PRIx64 "\n", threadinfo->regs.r_rip);
+ print_debug(" r_cs: 0x%" PRIx64 "\n", threadinfo->regs.r_cs);
+ print_debug(" r_rsp: 0x%" PRIx64 "\n", threadinfo->regs.r_rsp);
+ print_debug(" r_rflags: 0x%" PRIx64 "\n", threadinfo->regs.r_rflags);
+}
+
+// read all segments64 commands from core file
+// read all thread commands from core file
+static bool read_core_segments(struct ps_prochandle* ph) {
+ int i = 0;
+ int num_threads = 0;
+ int fd = ph->core->core_fd;
+ off_t offset = 0;
+ mach_header_64 fhead;
+ load_command lcmd;
+ segment_command_64 segcmd;
+ // thread_command thrcmd;
+
+ lseek(fd, offset, SEEK_SET);
+ if(read(fd, (void *)&fhead, sizeof(mach_header_64)) != sizeof(mach_header_64)) {
+ goto err;
+ }
+ print_debug("total commands: %d\n", fhead.ncmds);
+ offset += sizeof(mach_header_64);
+ for (i = 0; i < fhead.ncmds; i++) {
+ lseek(fd, offset, SEEK_SET);
+ if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) {
+ goto err;
+ }
+ offset += lcmd.cmdsize; // next command position
+ if (lcmd.cmd == LC_SEGMENT_64) {
+ lseek(fd, -sizeof(load_command), SEEK_CUR);
+ if (read(fd, (void *)&segcmd, sizeof(segment_command_64)) != sizeof(segment_command_64)) {
+ print_debug("failed to read LC_SEGMENT_64 i = %d!\n", i);
+ goto err;
+ }
+ if (add_map_info(ph, fd, segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize) == NULL) {
+ print_debug("Failed to add map_info at i = %d\n", i);
+ goto err;
+ }
+ print_debug("segment added: %" PRIu64 " 0x%" PRIx64 " %d\n",
+ segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize);
+ } else if (lcmd.cmd == LC_THREAD || lcmd.cmd == LC_UNIXTHREAD) {
+ typedef struct thread_fc {
+ uint32_t flavor;
+ uint32_t count;
+ } thread_fc;
+ thread_fc fc;
+ uint32_t size = sizeof(load_command);
+ while (size < lcmd.cmdsize) {
+ if (read(fd, (void *)&fc, sizeof(thread_fc)) != sizeof(thread_fc)) {
+ printf("Reading flavor, count failed.\n");
+ goto err;
+ }
+ size += sizeof(thread_fc);
+ if (fc.flavor == x86_THREAD_STATE) {
+ x86_thread_state_t thrstate;
+ if (read(fd, (void *)&thrstate, sizeof(x86_thread_state_t)) != sizeof(x86_thread_state_t)) {
+ printf("Reading flavor, count failed.\n");
+ goto err;
+ }
+ size += sizeof(x86_thread_state_t);
+ // create thread info list, update lwp_id later
+ sa_thread_info* newthr = add_thread_info(ph, (pthread_t) -1, (lwpid_t) num_threads++);
+ if (newthr == NULL) {
+ printf("create thread_info failed\n");
+ goto err;
+ }
+
+ // note __DARWIN_UNIX03 depengs on other definitions
+#if __DARWIN_UNIX03
+#define get_register_v(regst, regname) \
+ regst.uts.ts64.__##regname
+#else
+#define get_register_v(regst, regname) \
+ regst.uts.ts64.##regname
+#endif // __DARWIN_UNIX03
+ newthr->regs.r_rax = get_register_v(thrstate, rax);
+ newthr->regs.r_rbx = get_register_v(thrstate, rbx);
+ newthr->regs.r_rcx = get_register_v(thrstate, rcx);
+ newthr->regs.r_rdx = get_register_v(thrstate, rdx);
+ newthr->regs.r_rdi = get_register_v(thrstate, rdi);
+ newthr->regs.r_rsi = get_register_v(thrstate, rsi);
+ newthr->regs.r_rbp = get_register_v(thrstate, rbp);
+ newthr->regs.r_rsp = get_register_v(thrstate, rsp);
+ newthr->regs.r_r8 = get_register_v(thrstate, r8);
+ newthr->regs.r_r9 = get_register_v(thrstate, r9);
+ newthr->regs.r_r10 = get_register_v(thrstate, r10);
+ newthr->regs.r_r11 = get_register_v(thrstate, r11);
+ newthr->regs.r_r12 = get_register_v(thrstate, r12);
+ newthr->regs.r_r13 = get_register_v(thrstate, r13);
+ newthr->regs.r_r14 = get_register_v(thrstate, r14);
+ newthr->regs.r_r15 = get_register_v(thrstate, r15);
+ newthr->regs.r_rip = get_register_v(thrstate, rip);
+ newthr->regs.r_rflags = get_register_v(thrstate, rflags);
+ newthr->regs.r_cs = get_register_v(thrstate, cs);
+ newthr->regs.r_fs = get_register_v(thrstate, fs);
+ newthr->regs.r_gs = get_register_v(thrstate, gs);
+ print_thread(newthr);
+ } else if (fc.flavor == x86_FLOAT_STATE) {
+ x86_float_state_t flstate;
+ if (read(fd, (void *)&flstate, sizeof(x86_float_state_t)) != sizeof(x86_float_state_t)) {
+ print_debug("Reading flavor, count failed.\n");
+ goto err;
+ }
+ size += sizeof(x86_float_state_t);
+ } else if (fc.flavor == x86_EXCEPTION_STATE) {
+ x86_exception_state_t excpstate;
+ if (read(fd, (void *)&excpstate, sizeof(x86_exception_state_t)) != sizeof(x86_exception_state_t)) {
+ printf("Reading flavor, count failed.\n");
+ goto err;
+ }
+ size += sizeof(x86_exception_state_t);
+ }
+ }
+ }
+ }
+ return true;
+err:
+ return false;
+}
+
+/**local function **/
+bool exists(const char *fname)
+{
+ int fd;
+ if ((fd = open(fname, O_RDONLY)) > 0) {
+ close(fd);
+ return true;
+ }
+ return false;
+}
+
+// we check: 1. lib
+// 2. lib/server
+// 3. jre/lib
+// 4. jre/lib/server
+// from: 1. exe path
+// 2. JAVA_HOME
+// 3. DYLD_LIBRARY_PATH
+static bool get_real_path(struct ps_prochandle* ph, char *rpath) {
+ /** check if they exist in JAVA ***/
+ char* execname = ph->core->exec_path;
+ char filepath[4096];
+ char* filename = strrchr(rpath, '/'); // like /libjvm.dylib
+ if (filename == NULL) {
+ return false;
+ }
+
+ char* posbin = strstr(execname, "/bin/java");
+ if (posbin != NULL) {
+ memcpy(filepath, execname, posbin - execname); // not include trailing '/'
+ filepath[posbin - execname] = '\0';
+ } else {
+ char* java_home = getenv("JAVA_HOME");
+ if (java_home != NULL) {
+ strcpy(filepath, java_home);
+ } else {
+ char* dyldpath = getenv("DYLD_LIBRARY_PATH");
+ char* dypath = strtok(dyldpath, ":");
+ while (dypath != NULL) {
+ strcpy(filepath, dypath);
+ strcat(filepath, filename);
+ if (exists(filepath)) {
+ strcpy(rpath, filepath);
+ return true;
+ }
+ dypath = strtok(dyldpath, ":");
+ }
+ // not found
+ return false;
+ }
+ }
+ // for exec and java_home, jdkpath now is filepath
+ size_t filepath_base_size = strlen(filepath);
+
+ // first try /lib/ and /lib/server
+ strcat(filepath, "/lib");
+ strcat(filepath, filename);
+ if (exists(filepath)) {
+ strcpy(rpath, filepath);
+ return true;
+ }
+ char* pos = strstr(filepath, filename); // like /libjvm.dylib
+ *pos = '\0';
+ strcat(filepath, "/server");
+ strcat(filepath, filename);
+ if (exists(filepath)) {
+ strcpy(rpath, filepath);
+ return true;
+ }
+
+ // then try /jre/lib/ and /jre/lib/server
+ filepath[filepath_base_size] = '\0';
+ strcat(filepath, "/jre/lib");
+ strcat(filepath, filename);
+ if (exists(filepath)) {
+ strcpy(rpath, filepath);
+ return true;
+ }
+ pos = strstr(filepath, filename);
+ *pos = '\0';
+ strcat(filepath, "/server");
+ strcat(filepath, filename);
+ if (exists(filepath)) {
+ strcpy(rpath, filepath);
+ return true;
+ }
+
+ return false;
+}
+
+static bool read_shared_lib_info(struct ps_prochandle* ph) {
+ static int pagesize = 0;
+ int fd = ph->core->core_fd;
+ int i = 0, j;
+ uint32_t v;
+ mach_header_64 header; // used to check if a file header in segment
+ load_command lcmd;
+ dylib_command dylibcmd;
+
+ char name[BUF_SIZE]; // use to store name
+
+ if (pagesize == 0) {
+ pagesize = getpagesize();
+ print_debug("page size is %d\n", pagesize);
+ }
+ for (j = 0; j < ph->core->num_maps; j++) {
+ map_info *iter = ph->core->map_array[j]; // head
+ off_t fpos = iter->offset;
+ if (iter->fd != fd) {
+ // only search core file!
+ continue;
+ }
+ print_debug("map_info %d: vmaddr = 0x%016" PRIx64 " fileoff = %" PRIu64 " vmsize = %" PRIu64 "\n",
+ j, iter->vaddr, iter->offset, iter->memsz);
+ lseek(fd, fpos, SEEK_SET);
+ // we assume .dylib loaded at segment address --- which is true for JVM libraries
+ // multiple files may be loaded in one segment.
+ // if first word is not a magic word, means this segment does not contain lib file.
+ if (read(fd, (void *)&v, sizeof(uint32_t)) == sizeof(uint32_t)) {
+ if (v != MH_MAGIC_64) {
+ continue;
+ }
+ } else {
+ // may be encountered last map, which is not readable
+ continue;
+ }
+ while (ltell(fd) - iter->offset < iter->memsz) {
+ lseek(fd, fpos, SEEK_SET);
+ if (read(fd, (void *)&v, sizeof(uint32_t)) != sizeof(uint32_t)) {
+ break;
+ }
+ if (v != MH_MAGIC_64) {
+ fpos = (ltell(fd) + pagesize -1)/pagesize * pagesize;
+ continue;
+ }
+ lseek(fd, -sizeof(uint32_t), SEEK_CUR);
+ // this is the file begining to core file.
+ if (read(fd, (void *)&header, sizeof(mach_header_64)) != sizeof(mach_header_64)) {
+ goto err;
+ }
+ fpos = ltell(fd);
+
+ // found a mach-o file in this segment
+ for (i = 0; i < header.ncmds; i++) {
+ // read commands in this "file"
+ // LC_ID_DYLIB is the file itself for a .dylib
+ lseek(fd, fpos, SEEK_SET);
+ if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) {
+ return false; // error
+ }
+ fpos += lcmd.cmdsize; // next command position
+ // make sure still within seg size.
+ if (fpos - lcmd.cmdsize - iter->offset > iter->memsz) {
+ print_debug("Warning: out of segement limit: %ld \n", fpos - lcmd.cmdsize - iter->offset);
+ break; // no need to iterate all commands
+ }
+ if (lcmd.cmd == LC_ID_DYLIB) {
+ lseek(fd, -sizeof(load_command), SEEK_CUR);
+ if (read(fd, (void *)&dylibcmd, sizeof(dylib_command)) != sizeof(dylib_command)) {
+ return false;
+ }
+ /**** name stored at dylib_command.dylib.name.offset, is a C string */
+ lseek(fd, dylibcmd.dylib.name.offset - sizeof(dylib_command), SEEK_CUR);
+ int j = 0;
+ while (j < BUF_SIZE) {
+ read(fd, (void *)(name + j), sizeof(char));
+ if (name[j] == '\0') break;
+ j++;
+ }
+ print_debug("%s\n", name);
+ // changed name from @rpath/xxxx.dylib to real path
+ if (strrchr(name, '@')) {
+ get_real_path(ph, name);
+ print_debug("get_real_path returned: %s\n", name);
+ }
+ add_lib_info(ph, name, iter->vaddr);
+ break;
+ }
+ }
+ // done with the file, advanced to next page to search more files
+ fpos = (ltell(fd) + pagesize - 1) / pagesize * pagesize;
+ }
+ }
+ return true;
+err:
+ return false;
+}
+
+bool read_macho64_header(int fd, mach_header_64* core_header) {
+ bool is_macho = false;
+ if (fd < 0) return false;
+ off_t pos = ltell(fd);
+ lseek(fd, 0, SEEK_SET);
+ if (read(fd, (void *)core_header, sizeof(mach_header_64)) != sizeof(mach_header_64)) {
+ is_macho = false;
+ } else {
+ is_macho = (core_header->magic == MH_MAGIC_64 || core_header->magic == MH_CIGAM_64);
+ }
+ lseek(fd, pos, SEEK_SET);
+ return is_macho;
+}
+
+// the one and only one exposed stuff from this file
+struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) {
+ mach_header_64 core_header;
+ mach_header_64 exec_header;
+
+ struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle));
+ if (ph == NULL) {
+ print_debug("cant allocate ps_prochandle\n");
+ return NULL;
+ }
+
+ if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) {
+ free(ph);
+ print_debug("can't allocate ps_prochandle\n");
+ return NULL;
+ }
+
+ // initialize ph
+ ph->ops = &core_ops;
+ ph->core->core_fd = -1;
+ ph->core->exec_fd = -1;
+ ph->core->interp_fd = -1;
+
+ print_debug("exec: %s core: %s", exec_file, core_file);
+
+ strncpy(ph->core->exec_path, exec_file, sizeof(ph->core->exec_path));
+
+ // open the core file
+ if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) {
+ print_error("can't open core file\n");
+ goto err;
+ }
+
+ // read core file header
+ if (read_macho64_header(ph->core->core_fd, &core_header) != true || core_header.filetype != MH_CORE) {
+ print_debug("core file is not a valid Mach-O file\n");
+ goto err;
+ }
+
+ if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) {
+ print_error("can't open executable file\n");
+ goto err;
+ }
+
+ if (read_macho64_header(ph->core->exec_fd, &exec_header) != true ||
+ exec_header.filetype != MH_EXECUTE) {
+ print_error("executable file is not a valid Mach-O file\n");
+ goto err;
+ }
+
+ // process core file segments
+ if (read_core_segments(ph) != true) {
+ print_error("failed to read core segments\n");
+ goto err;
+ }
+
+ // allocate and sort maps into map_array, we need to do this
+ // here because read_shared_lib_info needs to read from debuggee
+ // address space
+ if (sort_map_array(ph) != true) {
+ print_error("failed to sort segment map array\n");
+ goto err;
+ }
+
+ if (read_shared_lib_info(ph) != true) {
+ print_error("failed to read libraries\n");
+ goto err;
+ }
+
+ // sort again because we have added more mappings from shared objects
+ if (sort_map_array(ph) != true) {
+ print_error("failed to sort segment map array\n");
+ goto err;
+ }
+
+ if (init_classsharing_workaround(ph) != true) {
+ print_error("failed to workaround classshareing\n");
+ goto err;
+ }
+
+ print_debug("Leave Pgrab_core\n");
+ return ph;
+
+err:
+ Prelease(ph);
+ return NULL;
+}
+
+#else // __APPLE__ (none macosx)
+
+// read regs and create thread from core file
static bool core_handle_prstatus(struct ps_prochandle* ph, const char* buf, size_t nbytes) {
// we have to read prstatus_t from buf
// assert(nbytes == sizeof(prstaus_t), "size mismatch on prstatus_t");
prstatus_t* prstat = (prstatus_t*) buf;
- thread_info* newthr;
+ sa_thread_info* newthr;
print_debug("got integer regset for lwp %d\n", prstat->pr_pid);
// we set pthread_t to -1 for core dump
if((newthr = add_thread_info(ph, (pthread_t) -1, prstat->pr_pid)) == NULL)
@@ -632,8 +1093,9 @@
notep->n_type, notep->n_descsz);
if (notep->n_type == NT_PRSTATUS) {
- if (core_handle_prstatus(ph, descdata, notep->n_descsz) != true)
+ if (core_handle_prstatus(ph, descdata, notep->n_descsz) != true) {
return false;
+ }
}
p = descdata + ROUNDUP(notep->n_descsz, 4);
}
@@ -681,7 +1143,9 @@
for (core_php = phbuf, i = 0; i < core_ehdr->e_phnum; i++) {
switch (core_php->p_type) {
case PT_NOTE:
- if (core_handle_note(ph, core_php) != true) goto err;
+ if (core_handle_note(ph, core_php) != true) {
+ goto err;
+ }
break;
case PT_LOAD: {
@@ -800,7 +1264,6 @@
return false;
}
-
#define FIRST_LINK_MAP_OFFSET offsetof(struct r_debug, r_map)
#define LD_BASE_OFFSET offsetof(struct r_debug, r_ldbase)
#define LINK_MAP_ADDR_OFFSET offsetof(struct link_map, l_addr)
@@ -810,213 +1273,218 @@
// read shared library info from runtime linker's data structures.
// This work is done by librtlb_db in Solaris
static bool read_shared_lib_info(struct ps_prochandle* ph) {
- uintptr_t addr = ph->core->dynamic_addr;
- uintptr_t debug_base;
- uintptr_t first_link_map_addr;
- uintptr_t ld_base_addr;
- uintptr_t link_map_addr;
- uintptr_t lib_base_diff;
- uintptr_t lib_base;
- uintptr_t lib_name_addr;
- char lib_name[BUF_SIZE];
- ELF_DYN dyn;
- ELF_EHDR elf_ehdr;
- int lib_fd;
+ uintptr_t addr = ph->core->dynamic_addr;
+ uintptr_t debug_base;
+ uintptr_t first_link_map_addr;
+ uintptr_t ld_base_addr;
+ uintptr_t link_map_addr;
+ uintptr_t lib_base_diff;
+ uintptr_t lib_base;
+ uintptr_t lib_name_addr;
+ char lib_name[BUF_SIZE];
+ ELF_DYN dyn;
+ ELF_EHDR elf_ehdr;
+ int lib_fd;
- // _DYNAMIC has information of the form
- // [tag] [data] [tag] [data] .....
- // Both tag and data are pointer sized.
- // We look for dynamic info with DT_DEBUG. This has shared object info.
- // refer to struct r_debug in link.h
+ // _DYNAMIC has information of the form
+ // [tag] [data] [tag] [data] .....
+ // Both tag and data are pointer sized.
+ // We look for dynamic info with DT_DEBUG. This has shared object info.
+ // refer to struct r_debug in link.h
- dyn.d_tag = DT_NULL;
- while (dyn.d_tag != DT_DEBUG) {
- if (ps_pread(ph, (psaddr_t) addr, &dyn, sizeof(ELF_DYN)) != PS_OK) {
- print_debug("can't read debug info from _DYNAMIC\n");
- return false;
- }
- addr += sizeof(ELF_DYN);
- }
+ dyn.d_tag = DT_NULL;
+ while (dyn.d_tag != DT_DEBUG) {
+ if (ps_pread(ph, (psaddr_t) addr, &dyn, sizeof(ELF_DYN)) != PS_OK) {
+ print_debug("can't read debug info from _DYNAMIC\n");
+ return false;
+ }
+ addr += sizeof(ELF_DYN);
+ }
- // we have got Dyn entry with DT_DEBUG
- debug_base = dyn.d_un.d_ptr;
- // at debug_base we have struct r_debug. This has first link map in r_map field
- if (ps_pread(ph, (psaddr_t) debug_base + FIRST_LINK_MAP_OFFSET,
- &first_link_map_addr, sizeof(uintptr_t)) != PS_OK) {
- print_debug("can't read first link map address\n");
- return false;
- }
+ // we have got Dyn entry with DT_DEBUG
+ debug_base = dyn.d_un.d_ptr;
+ // at debug_base we have struct r_debug. This has first link map in r_map field
+ if (ps_pread(ph, (psaddr_t) debug_base + FIRST_LINK_MAP_OFFSET,
+ &first_link_map_addr, sizeof(uintptr_t)) != PS_OK) {
+ print_debug("can't read first link map address\n");
+ return false;
+ }
- // read ld_base address from struct r_debug
- // XXX: There is no r_ldbase member on BSD
-/*
- if (ps_pread(ph, (psaddr_t) debug_base + LD_BASE_OFFSET, &ld_base_addr,
- sizeof(uintptr_t)) != PS_OK) {
- print_debug("can't read ld base address\n");
- return false;
- }
- ph->core->ld_base_addr = ld_base_addr;
-*/
- ph->core->ld_base_addr = 0;
+ // read ld_base address from struct r_debug
+ // XXX: There is no r_ldbase member on BSD
+ /*
+ if (ps_pread(ph, (psaddr_t) debug_base + LD_BASE_OFFSET, &ld_base_addr,
+ sizeof(uintptr_t)) != PS_OK) {
+ print_debug("can't read ld base address\n");
+ return false;
+ }
+ ph->core->ld_base_addr = ld_base_addr;
+ */
+ ph->core->ld_base_addr = 0;
- print_debug("interpreter base address is 0x%lx\n", ld_base_addr);
+ print_debug("interpreter base address is 0x%lx\n", ld_base_addr);
- // now read segments from interp (i.e ld-elf.so.1)
- if (read_interp_segments(ph) != true)
- return false;
+ // now read segments from interp (i.e ld-elf.so.1)
+ if (read_interp_segments(ph) != true)
+ return false;
- // after adding interpreter (ld.so) mappings sort again
- if (sort_map_array(ph) != true)
- return false;
+ // after adding interpreter (ld.so) mappings sort again
+ if (sort_map_array(ph) != true)
+ return false;
- print_debug("first link map is at 0x%lx\n", first_link_map_addr);
+ print_debug("first link map is at 0x%lx\n", first_link_map_addr);
- link_map_addr = first_link_map_addr;
- while (link_map_addr != 0) {
- // read library base address of the .so. Note that even though <sys/link.h> calls
- // link_map->l_addr as "base address", this is * not * really base virtual
- // address of the shared object. This is actually the difference b/w the virtual
- // address mentioned in shared object and the actual virtual base where runtime
- // linker loaded it. We use "base diff" in read_lib_segments call below.
+ link_map_addr = first_link_map_addr;
+ while (link_map_addr != 0) {
+ // read library base address of the .so. Note that even though <sys/link.h> calls
+ // link_map->l_addr as "base address", this is * not * really base virtual
+ // address of the shared object. This is actually the difference b/w the virtual
+ // address mentioned in shared object and the actual virtual base where runtime
+ // linker loaded it. We use "base diff" in read_lib_segments call below.
- if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_ADDR_OFFSET,
- &lib_base_diff, sizeof(uintptr_t)) != PS_OK) {
- print_debug("can't read shared object base address diff\n");
- return false;
- }
+ if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_ADDR_OFFSET,
+ &lib_base_diff, sizeof(uintptr_t)) != PS_OK) {
+ print_debug("can't read shared object base address diff\n");
+ return false;
+ }
- // read address of the name
- if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NAME_OFFSET,
- &lib_name_addr, sizeof(uintptr_t)) != PS_OK) {
- print_debug("can't read address of shared object name\n");
- return false;
- }
+ // read address of the name
+ if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NAME_OFFSET,
+ &lib_name_addr, sizeof(uintptr_t)) != PS_OK) {
+ print_debug("can't read address of shared object name\n");
+ return false;
+ }
- // read name of the shared object
- if (read_string(ph, (uintptr_t) lib_name_addr, lib_name, sizeof(lib_name)) != true) {
- print_debug("can't read shared object name\n");
- return false;
- }
+ // read name of the shared object
+ if (read_string(ph, (uintptr_t) lib_name_addr, lib_name, sizeof(lib_name)) != true) {
+ print_debug("can't read shared object name\n");
+ return false;
+ }
- if (lib_name[0] != '\0') {
- // ignore empty lib names
- lib_fd = pathmap_open(lib_name);
+ if (lib_name[0] != '\0') {
+ // ignore empty lib names
+ lib_fd = pathmap_open(lib_name);
- if (lib_fd < 0) {
- print_debug("can't open shared object %s\n", lib_name);
- // continue with other libraries...
- } else {
- if (read_elf_header(lib_fd, &elf_ehdr)) {
- lib_base = lib_base_diff + find_base_address(lib_fd, &elf_ehdr);
- print_debug("reading library %s @ 0x%lx [ 0x%lx ]\n",
- lib_name, lib_base, lib_base_diff);
- // while adding library mappings we need to use "base difference".
- if (! read_lib_segments(ph, lib_fd, &elf_ehdr, lib_base_diff)) {
- print_debug("can't read shared object's segments\n");
- close(lib_fd);
- return false;
- }
- add_lib_info_fd(ph, lib_name, lib_fd, lib_base);
- // Map info is added for the library (lib_name) so
- // we need to re-sort it before calling the p_pdread.
- if (sort_map_array(ph) != true)
- return false;
- } else {
- print_debug("can't read ELF header for shared object %s\n", lib_name);
- close(lib_fd);
- // continue with other libraries...
- }
- }
+ if (lib_fd < 0) {
+ print_debug("can't open shared object %s\n", lib_name);
+ // continue with other libraries...
+ } else {
+ if (read_elf_header(lib_fd, &elf_ehdr)) {
+ lib_base = lib_base_diff + find_base_address(lib_fd, &elf_ehdr);
+ print_debug("reading library %s @ 0x%lx [ 0x%lx ]\n",
+ lib_name, lib_base, lib_base_diff);
+ // while adding library mappings we need to use "base difference".
+ if (! read_lib_segments(ph, lib_fd, &elf_ehdr, lib_base_diff)) {
+ print_debug("can't read shared object's segments\n");
+ close(lib_fd);
+ return false;
+ }
+ add_lib_info_fd(ph, lib_name, lib_fd, lib_base);
+ // Map info is added for the library (lib_name) so
+ // we need to re-sort it before calling the p_pdread.
+ if (sort_map_array(ph) != true)
+ return false;
+ } else {
+ print_debug("can't read ELF header for shared object %s\n", lib_name);
+ close(lib_fd);
+ // continue with other libraries...
+ }
}
+ }
- // read next link_map address
- if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NEXT_OFFSET,
- &link_map_addr, sizeof(uintptr_t)) != PS_OK) {
- print_debug("can't read next link in link_map\n");
- return false;
- }
- }
+ // read next link_map address
+ if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NEXT_OFFSET,
+ &link_map_addr, sizeof(uintptr_t)) != PS_OK) {
+ print_debug("can't read next link in link_map\n");
+ return false;
+ }
+ }
- return true;
+ return true;
}
// the one and only one exposed stuff from this file
struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) {
- ELF_EHDR core_ehdr;
- ELF_EHDR exec_ehdr;
+ ELF_EHDR core_ehdr;
+ ELF_EHDR exec_ehdr;
- struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle));
- if (ph == NULL) {
- print_debug("can't allocate ps_prochandle\n");
- return NULL;
- }
+ struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle));
+ if (ph == NULL) {
+ print_debug("cant allocate ps_prochandle\n");
+ return NULL;
+ }
- if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) {
- free(ph);
- print_debug("can't allocate ps_prochandle\n");
- return NULL;
- }
+ if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) {
+ free(ph);
+ print_debug("can't allocate ps_prochandle\n");
+ return NULL;
+ }
- // initialize ph
- ph->ops = &core_ops;
- ph->core->core_fd = -1;
- ph->core->exec_fd = -1;
- ph->core->interp_fd = -1;
+ // initialize ph
+ ph->ops = &core_ops;
+ ph->core->core_fd = -1;
+ ph->core->exec_fd = -1;
+ ph->core->interp_fd = -1;
+
+ print_debug("exec: %s core: %s", exec_file, core_file);
- // open the core file
- if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) {
- print_debug("can't open core file\n");
- goto err;
- }
+ // open the core file
+ if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) {
+ print_debug("can't open core file\n");
+ goto err;
+ }
- // read core file ELF header
- if (read_elf_header(ph->core->core_fd, &core_ehdr) != true || core_ehdr.e_type != ET_CORE) {
- print_debug("core file is not a valid ELF ET_CORE file\n");
- goto err;
- }
+ // read core file ELF header
+ if (read_elf_header(ph->core->core_fd, &core_ehdr) != true || core_ehdr.e_type != ET_CORE) {
+ print_debug("core file is not a valid ELF ET_CORE file\n");
+ goto err;
+ }
- if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) {
- print_debug("can't open executable file\n");
- goto err;
- }
+ if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) {
+ print_debug("can't open executable file\n");
+ goto err;
+ }
- if (read_elf_header(ph->core->exec_fd, &exec_ehdr) != true || exec_ehdr.e_type != ET_EXEC) {
- print_debug("executable file is not a valid ELF ET_EXEC file\n");
- goto err;
- }
+ if (read_elf_header(ph->core->exec_fd, &exec_ehdr) != true || exec_ehdr.e_type != ET_EXEC) {
+ print_debug("executable file is not a valid ELF ET_EXEC file\n");
+ goto err;
+ }
- // process core file segments
- if (read_core_segments(ph, &core_ehdr) != true)
- goto err;
+ // process core file segments
+ if (read_core_segments(ph, &core_ehdr) != true)
+ goto err;
- // process exec file segments
- if (read_exec_segments(ph, &exec_ehdr) != true)
- goto err;
+ // process exec file segments
+ if (read_exec_segments(ph, &exec_ehdr) != true)
+ goto err;
- // exec file is also treated like a shared object for symbol search
- if (add_lib_info_fd(ph, exec_file, ph->core->exec_fd,
- (uintptr_t)0 + find_base_address(ph->core->exec_fd, &exec_ehdr)) == NULL)
- goto err;
+ // exec file is also treated like a shared object for symbol search
+ if (add_lib_info_fd(ph, exec_file, ph->core->exec_fd,
+ (uintptr_t)0 + find_base_address(ph->core->exec_fd, &exec_ehdr)) == NULL)
+ goto err;
- // allocate and sort maps into map_array, we need to do this
- // here because read_shared_lib_info needs to read from debuggee
- // address space
- if (sort_map_array(ph) != true)
- goto err;
+ // allocate and sort maps into map_array, we need to do this
+ // here because read_shared_lib_info needs to read from debuggee
+ // address space
+ if (sort_map_array(ph) != true)
+ goto err;
- if (read_shared_lib_info(ph) != true)
- goto err;
+ if (read_shared_lib_info(ph) != true)
+ goto err;
- // sort again because we have added more mappings from shared objects
- if (sort_map_array(ph) != true)
- goto err;
+ // sort again because we have added more mappings from shared objects
+ if (sort_map_array(ph) != true)
+ goto err;
- if (init_classsharing_workaround(ph) != true)
- goto err;
+ if (init_classsharing_workaround(ph) != true)
+ goto err;
- return ph;
+ print_debug("Leave Pgrab_core\n");
+ return ph;
err:
- Prelease(ph);
- return NULL;
+ Prelease(ph);
+ return NULL;
}
+
+#endif // __APPLE__