/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <mach/task.h> /* task_suspend() */
#include <kern/task.h> /* get_task_numacts() */
+#include <security/audit/audit.h>
+
typedef struct {
int flavor; /* the number for this flavor */
- int count; /* count of ints in this flavor */
+ mach_msg_type_number_t count; /* count of ints in this flavor */
} mythread_state_flavor_t;
-#if defined (__ppc__)
-
-mythread_state_flavor_t thread_flavor_array[]={
- {PPC_THREAD_STATE , PPC_THREAD_STATE_COUNT},
- {PPC_FLOAT_STATE, PPC_FLOAT_STATE_COUNT},
- {PPC_EXCEPTION_STATE, PPC_EXCEPTION_STATE_COUNT},
- {PPC_VECTOR_STATE, PPC_VECTOR_STATE_COUNT}
- };
-int mynum_flavors=4;
-#elif defined (__i386__)
+#if defined (__i386__) || defined (__x86_64__)
mythread_state_flavor_t thread_flavor_array [] = {
- {i386_THREAD_STATE, i386_THREAD_STATE_COUNT},
- {i386_THREAD_FPSTATE, i386_THREAD_FPSTATE_COUNT},
- {i386_THREAD_EXCEPTSTATE, i386_THREAD_EXCEPTSTATE_COUNT},
- {i386_THREAD_CTHREADSTATE, i386_THREAD_CTHREADSTATE_COUNT},
- {i386_NEW_THREAD_STATE, i386_NEW_THREAD_STATE_COUNT},
- {i386_FLOAT_STATE, i386_FLOAT_STATE_COUNT},
- {i386_ISA_PORT_MAP_STATE, i386_ISA_PORT_MAP_STATE_COUNT},
- {i386_V86_ASSIST_STATE, i386_V86_ASSIST_STATE_COUNT},
- {THREAD_SYSCALL_STATE, i386_THREAD_SYSCALL_STATE_COUNT}
+ {x86_THREAD_STATE, x86_THREAD_STATE_COUNT},
+ {x86_FLOAT_STATE, x86_FLOAT_STATE_COUNT},
+ {x86_EXCEPTION_STATE, x86_EXCEPTION_STATE_COUNT},
};
-int mynum_flavors=9;
-
+int mynum_flavors=3;
#else
#error architecture not supported
#endif
int hoffset;
mythread_state_flavor_t *flavors;
int tstate_size;
+ int flavor_count;
} tir_t;
/* XXX should be static */
void collectth_state(thread_t th_act, void *tirp);
+extern int freespace_mb(vnode_t vp);
+
/* XXX not in a Mach header anywhere */
kern_return_t thread_getstatus(register thread_t act, int flavor,
thread_state_t tstate, mach_msg_type_number_t *count);
void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *);
+extern kern_return_t task_suspend_internal(task_t);
+
+static cpu_type_t process_cpu_type(proc_t proc);
+static cpu_type_t process_cpu_subtype(proc_t proc);
+
+#ifdef SECURE_KERNEL
+__XNU_PRIVATE_EXTERN int do_coredump = 0; /* default: don't dump cores */
+#else
+__XNU_PRIVATE_EXTERN int do_coredump = 1; /* default: dump cores */
+#endif
+__XNU_PRIVATE_EXTERN int sugid_coredump = 0; /* default: but not SGUID binaries */
+
+
+/* cpu_type returns only the most generic indication of the current CPU. */
+/* in a core we want to know the kind of process. */
+static cpu_type_t
+process_cpu_type(proc_t core_proc)
+{
+ cpu_type_t what_we_think;
+#if defined (__i386__) || defined (__x86_64__)
+ if (IS_64BIT_PROCESS(core_proc)) {
+ what_we_think = CPU_TYPE_X86_64;
+ } else {
+ what_we_think = CPU_TYPE_I386;
+ }
+#endif
+ return what_we_think;
+}
-__private_extern__ int do_coredump = 1; /* default: dump cores */
-__private_extern__ int sugid_coredump = 0; /* default: but not SGUID binaries */
+static cpu_type_t
+process_cpu_subtype(proc_t core_proc)
+{
+ cpu_type_t what_we_think;
+#if defined (__i386__) || defined (__x86_64__)
+ if (IS_64BIT_PROCESS(core_proc)) {
+ what_we_think = CPU_SUBTYPE_X86_64_ALL;
+ } else {
+ what_we_think = CPU_SUBTYPE_I386_ALL;
+ }
+#endif
+ return what_we_think;
+}
void
collectth_state(thread_t th_act, void *tirp)
* the appropriate thread state struct for each
* thread state flavor.
*/
- for (i = 0; i < mynum_flavors; i++) {
+ for (i = 0; i < t->flavor_count; i++) {
*(mythread_state_flavor_t *)(header+hoffset) =
flavors[i];
hoffset += sizeof(mythread_state_flavor_t);
t->hoffset = hoffset;
}
+
/*
- * Create a core image on the file "core".
+ * coredump
+ *
+ * Description: Create a core image on the file "core" for the process
+ * indicated
+ *
+ * Parameters: core_proc Process to dump core [*]
+ * reserve_mb If non-zero, leave filesystem with
+ * at least this much free space.
+ * ignore_ulimit If set, ignore the process's core file ulimit.
+ *
+ * Returns: 0 Success
+ * EFAULT Failed
+ *
+ * IMPORTANT: This function can only be called on the current process, due
+ * to assumptions below; see variable declaration section for
+ * details.
*/
#define MAX_TSTATE_FLAVORS 10
int
-coredump(struct proc *p)
+coredump(proc_t core_proc, uint32_t reserve_mb, int ignore_ulimit)
{
- int error=0;
- kauth_cred_t cred = kauth_cred_get();
+/* Begin assumptions that limit us to only the current process */
+ vfs_context_t ctx = vfs_context_current();
+ vm_map_t map = current_map();
+ task_t task = current_task();
+/* End assumptions */
+ kauth_cred_t cred = vfs_context_ucred(ctx);
+ int error = 0;
struct vnode_attr va;
- struct vfs_context context;
- vm_map_t map;
int thread_count, segment_count;
int command_size, header_size, tstate_size;
int hoffset;
off_t foffset;
- vm_map_offset_t vmoffset;
+ mach_vm_offset_t vmoffset;
vm_offset_t header;
- vm_map_size_t vmsize;
+ mach_vm_size_t vmsize;
vm_prot_t prot;
vm_prot_t maxprot;
vm_inherit_t inherit;
- int error1;
- task_t task;
- char core_name[MAXCOMLEN+6];
+ int error1 = 0;
+ char stack_name[MAXCOMLEN+6];
+ char *alloced_name = NULL;
char *name;
mythread_state_flavor_t flavors[MAX_TSTATE_FLAVORS];
vm_size_t mapsize;
int i;
- int nesting_depth = 0;
+ uint32_t nesting_depth = 0;
kern_return_t kret;
struct vm_region_submap_info_64 vbr;
- int vbrcount=0;
+ mach_msg_type_number_t vbrcount = 0;
tir_t tir1;
struct vnode * vp;
- struct mach_header *mh;
- struct mach_header_64 *mh64;
+ struct mach_header *mh = NULL; /* protected by is_64 */
+ struct mach_header_64 *mh64 = NULL; /* protected by is_64 */
int is_64 = 0;
size_t mach_header_sz = sizeof(struct mach_header);
size_t segment_command_sz = sizeof(struct segment_command);
+
+ if (current_proc() != core_proc) {
+ panic("coredump() called against proc that is not current_proc: %p", core_proc);
+ }
if (do_coredump == 0 || /* Not dumping at all */
( (sugid_coredump == 0) && /* Not dumping SUID/SGID binaries */
- ( (cred->cr_svuid != cred->cr_ruid) ||
- (cred->cr_svgid != cred->cr_rgid)))) {
-
+ ( (kauth_cred_getsvuid(cred) != kauth_cred_getruid(cred)) ||
+ (kauth_cred_getsvgid(cred) != kauth_cred_getrgid(cred))))) {
+
+#if CONFIG_AUDIT
+ audit_proc_coredump(core_proc, NULL, EFAULT);
+#endif
return (EFAULT);
}
- if (IS_64BIT_PROCESS(p)) {
+ if (IS_64BIT_PROCESS(core_proc)) {
is_64 = 1;
mach_header_sz = sizeof(struct mach_header_64);
segment_command_sz = sizeof(struct segment_command_64);
}
- task = current_task();
- map = current_map();
mapsize = get_vmmap_size(map);
- if (mapsize >= p->p_rlimit[RLIMIT_CORE].rlim_cur)
+ if ((mapsize >= core_proc->p_rlimit[RLIMIT_CORE].rlim_cur) && (ignore_ulimit == 0))
return (EFAULT);
- (void) task_suspend(task);
+ (void) task_suspend_internal(task);
- /* create name according to sysctl'able format string */
- name = proc_core_name(p->p_comm, kauth_cred_getuid(cred), p->p_pid);
+ MALLOC(alloced_name, char *, MAXPATHLEN, M_TEMP, M_NOWAIT | M_ZERO);
+ /* create name according to sysctl'able format string */
/* if name creation fails, fall back to historical behaviour... */
- if (name == NULL) {
- sprintf(core_name, "/cores/core.%d", p->p_pid);
- name = core_name;
- }
- context.vc_proc = p;
- context.vc_ucred = cred;
-
- if ((error = vnode_open(name, (O_CREAT | FWRITE | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, &context)))
- return (error);
+ if (alloced_name == NULL ||
+ proc_core_name(core_proc->p_comm, kauth_cred_getuid(cred),
+ core_proc->p_pid, alloced_name, MAXPATHLEN)) {
+ snprintf(stack_name, sizeof(stack_name),
+ "/cores/core.%d", core_proc->p_pid);
+ name = stack_name;
+ } else
+ name = alloced_name;
+
+ if ((error = vnode_open(name, (O_CREAT | FWRITE | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, ctx)))
+ goto out2;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_nlink);
/* Don't dump to non-regular files or files with links. */
if (vp->v_type != VREG ||
- vnode_getattr(vp, &va, &context) || va.va_nlink != 1) {
+ vnode_getattr(vp, &va, ctx) || va.va_nlink != 1) {
error = EFAULT;
goto out;
}
VATTR_INIT(&va); /* better to do it here than waste more stack in vnode_setsize */
VATTR_SET(&va, va_data_size, 0);
- vnode_setattr(vp, &va, &context);
- p->p_acflag |= ACORE;
+ vnode_setattr(vp, &va, ctx);
+ core_proc->p_acflag |= ACORE;
+
+ if ((reserve_mb > 0) &&
+ ((freespace_mb(vp) - (mapsize >> 20)) < reserve_mb)) {
+ error = ENOSPC;
+ goto out;
+ }
/*
* If the task is modified while dumping the file
thread_count = get_task_numacts(task);
segment_count = get_vmmap_entries(map); /* XXX */
- bcopy(thread_flavor_array,flavors,sizeof(thread_flavor_array));
+ tir1.flavor_count = sizeof(thread_flavor_array)/sizeof(mythread_state_flavor_t);
+ bcopy(thread_flavor_array, flavors,sizeof(thread_flavor_array));
tstate_size = 0;
- for (i = 0; i < mynum_flavors; i++)
+ for (i = 0; i < tir1.flavor_count; i++)
tstate_size += sizeof(mythread_state_flavor_t) +
(flavors[i].count * sizeof(int));
-
command_size = segment_count * segment_command_sz +
thread_count*sizeof(struct thread_command) +
tstate_size*thread_count;
header_size = command_size + mach_header_sz;
- (void) kmem_alloc(kernel_map,
- (vm_offset_t *)&header,
- (vm_size_t)header_size);
+ if (kmem_alloc(kernel_map, &header, (vm_size_t)header_size) != KERN_SUCCESS) {
+ error = ENOMEM;
+ goto out;
+ }
/*
* Set up Mach-O header.
if (is_64) {
mh64 = (struct mach_header_64 *)header;
mh64->magic = MH_MAGIC_64;
- mh64->cputype = cpu_type();
- mh64->cpusubtype = cpu_subtype();
+ mh64->cputype = process_cpu_type(core_proc);
+ mh64->cpusubtype = process_cpu_subtype(core_proc);
mh64->filetype = MH_CORE;
mh64->ncmds = segment_count + thread_count;
mh64->sizeofcmds = command_size;
} else {
mh = (struct mach_header *)header;
mh->magic = MH_MAGIC;
- mh->cputype = cpu_type();
- mh->cpusubtype = cpu_subtype();
+ mh->cputype = process_cpu_type(core_proc);
+ mh->cpusubtype = process_cpu_subtype(core_proc);
mh->filetype = MH_CORE;
mh->ncmds = segment_count + thread_count;
mh->sizeofcmds = command_size;
sc->cmdsize = sizeof(struct segment_command);
/* segment name is zeroed by kmem_alloc */
sc->segname[0] = 0;
- sc->vmaddr = CAST_DOWN(vm_offset_t,vmoffset);
- sc->vmsize = CAST_DOWN(vm_size_t,vmsize);
- sc->fileoff = CAST_DOWN(uint32_t,foffset);
- sc->filesize = CAST_DOWN(uint32_t,vmsize);
+ sc->vmaddr = CAST_DOWN_EXPLICIT(vm_offset_t,vmoffset);
+ sc->vmsize = CAST_DOWN_EXPLICIT(vm_size_t,vmsize);
+ sc->fileoff = CAST_DOWN_EXPLICIT(uint32_t,foffset); /* will never truncate */
+ sc->filesize = CAST_DOWN_EXPLICIT(uint32_t,vmsize); /* will never truncate */
sc->maxprot = maxprot;
sc->initprot = prot;
sc->nsects = 0;
if ((maxprot & VM_PROT_READ) == VM_PROT_READ
&& vbr.user_tag != VM_MEMORY_IOKIT
&& coredumpok(map,vmoffset)) {
- vm_map_size_t tmp_vmsize = vmsize;
- off_t xfer_foffset = foffset;
-
- //LP64todo - works around vn_rdwr_64() 2G limit
- while (tmp_vmsize > 0) {
- vm_map_size_t xfer_vmsize = tmp_vmsize;
- if (xfer_vmsize > INT_MAX)
- xfer_vmsize = INT_MAX;
- error = vn_rdwr_64(UIO_WRITE, vp,
- vmoffset, xfer_vmsize, xfer_foffset,
- (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
- tmp_vmsize -= xfer_vmsize;
- xfer_foffset += xfer_vmsize;
- }
+
+ error = vn_rdwr_64(UIO_WRITE, vp, vmoffset, vmsize, foffset,
+ (IS_64BIT_PROCESS(core_proc) ? UIO_USERSPACE64 : UIO_USERSPACE32),
+ IO_NOCACHE|IO_NODELOCKED|IO_UNIT, cred, (int64_t *) 0, core_proc);
+
}
hoffset += segment_command_sz;
*/
if (is_64) {
mh64->ncmds -= segment_count;
+ mh64->sizeofcmds -= segment_count * segment_command_sz;
} else {
mh->ncmds -= segment_count;
+ mh->sizeofcmds -= segment_count * segment_command_sz;
}
tir1.header = header;
* file. OK to use a 32 bit write for this.
*/
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)header, header_size, (off_t)0,
- UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
+ UIO_SYSSPACE, IO_NOCACHE|IO_NODELOCKED|IO_UNIT, cred, (int *) 0, core_proc);
kmem_free(kernel_map, header, header_size);
out:
- error1 = vnode_close(vp, FWRITE, &context);
+ error1 = vnode_close(vp, FWRITE, ctx);
+out2:
+#if CONFIG_AUDIT
+ audit_proc_coredump(core_proc, name, error);
+#endif
+ if (alloced_name != NULL)
+ FREE(alloced_name, M_TEMP);
if (error == 0)
error = error1;
projects / apple / xnu.git / blobdiff