| /* Low level interface for debugging AIX 4.3+ pthreads. |
| |
| Copyright (C) 1999-2021 Free Software Foundation, Inc. |
| Written by Nick Duffek <nsd@redhat.com>. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| |
| /* This module uses the libpthdebug.a library provided by AIX 4.3+ for |
| debugging pthread applications. |
| |
| Some name prefix conventions: |
| pthdb_ provided by libpthdebug.a |
| pdc_ callbacks that this module provides to libpthdebug.a |
| pd_ variables or functions interfacing with libpthdebug.a |
| |
| libpthdebug peculiarities: |
| |
| - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but |
| it's not documented, and after several calls it stops working |
| and causes other libpthdebug functions to fail. |
| |
| - pthdb_tid_pthread() doesn't always work after |
| pthdb_session_update(), but it does work after cycling through |
| all threads using pthdb_pthread(). |
| |
| */ |
| |
| #include "defs.h" |
| #include "gdbthread.h" |
| #include "target.h" |
| #include "inferior.h" |
| #include "regcache.h" |
| #include "gdbcmd.h" |
| #include "ppc-tdep.h" |
| #include "observable.h" |
| #include "objfiles.h" |
| |
| #include <procinfo.h> |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <sys/reg.h> |
| #include <sched.h> |
| #include <sys/pthdebug.h> |
| |
| #if !HAVE_DECL_GETTHRDS |
| extern int getthrds (pid_t, struct thrdsinfo64 *, int, tid_t *, int); |
| #endif |
| |
| /* Whether to emit debugging output. */ |
| static bool debug_aix_thread; |
| |
| /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */ |
| #ifndef PTHDB_VERSION_3 |
| #define pthdb_tid_t tid_t |
| #endif |
| |
| /* Return whether to treat PID as a debuggable thread id. */ |
| |
| #define PD_TID(ptid) (pd_active && ptid.tid () != 0) |
| |
| /* pthdb_user_t value that we pass to pthdb functions. 0 causes |
| PTHDB_BAD_USER errors, so use 1. */ |
| |
| #define PD_USER 1 |
| |
| /* Success and failure values returned by pthdb callbacks. */ |
| |
| #define PDC_SUCCESS PTHDB_SUCCESS |
| #define PDC_FAILURE PTHDB_CALLBACK |
| |
| /* Private data attached to each element in GDB's thread list. */ |
| |
| struct aix_thread_info : public private_thread_info |
| { |
| pthdb_pthread_t pdtid; /* thread's libpthdebug id */ |
| pthdb_tid_t tid; /* kernel thread id */ |
| }; |
| |
| /* Return the aix_thread_info attached to THREAD. */ |
| |
| static aix_thread_info * |
| get_aix_thread_info (thread_info *thread) |
| { |
| return static_cast<aix_thread_info *> (thread->priv.get ()); |
| } |
| |
| /* Information about a thread of which libpthdebug is aware. */ |
| |
| struct pd_thread { |
| pthdb_pthread_t pdtid; |
| pthread_t pthid; |
| pthdb_tid_t tid; |
| }; |
| |
| /* This module's target-specific operations, active while pd_able is true. */ |
| |
| static const target_info aix_thread_target_info = { |
| "aix-threads", |
| N_("AIX pthread support"), |
| N_("AIX pthread support") |
| }; |
| |
| class aix_thread_target final : public target_ops |
| { |
| public: |
| const target_info &info () const override |
| { return aix_thread_target_info; } |
| |
| strata stratum () const override { return thread_stratum; } |
| |
| void detach (inferior *, int) override; |
| void resume (ptid_t, int, enum gdb_signal) override; |
| ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; |
| |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| |
| enum target_xfer_status xfer_partial (enum target_object object, |
| const char *annex, |
| gdb_byte *readbuf, |
| const gdb_byte *writebuf, |
| ULONGEST offset, ULONGEST len, |
| ULONGEST *xfered_len) override; |
| |
| void mourn_inferior () override; |
| |
| bool thread_alive (ptid_t ptid) override; |
| |
| std::string pid_to_str (ptid_t) override; |
| |
| const char *extra_thread_info (struct thread_info *) override; |
| |
| ptid_t get_ada_task_ptid (long lwp, ULONGEST thread) override; |
| }; |
| |
| static aix_thread_target aix_thread_ops; |
| |
| /* Address of the function that libpthread will call when libpthdebug |
| is ready to be initialized. */ |
| |
| static CORE_ADDR pd_brk_addr; |
| |
| /* Whether the current application is debuggable by pthdb. */ |
| |
| static int pd_able = 0; |
| |
| /* Whether a threaded application is being debugged. */ |
| |
| static int pd_active = 0; |
| |
| /* Whether the current architecture is 64-bit. |
| Only valid when pd_able is true. */ |
| |
| static int arch64; |
| |
| /* Forward declarations for pthdb callbacks. */ |
| |
| static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int); |
| static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t); |
| static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid, |
| unsigned long long flags, |
| pthdb_context_t *context); |
| static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid, |
| unsigned long long flags, |
| pthdb_context_t *context); |
| static int pdc_alloc (pthdb_user_t, size_t, void **); |
| static int pdc_realloc (pthdb_user_t, void *, size_t, void **); |
| static int pdc_dealloc (pthdb_user_t, void *); |
| |
| /* pthdb callbacks. */ |
| |
| static pthdb_callbacks_t pd_callbacks = { |
| pdc_symbol_addrs, |
| pdc_read_data, |
| pdc_write_data, |
| pdc_read_regs, |
| pdc_write_regs, |
| pdc_alloc, |
| pdc_realloc, |
| pdc_dealloc, |
| NULL |
| }; |
| |
| /* Current pthdb session. */ |
| |
| static pthdb_session_t pd_session; |
| |
| /* Return a printable representation of pthdebug function return |
| STATUS. */ |
| |
| static const char * |
| pd_status2str (int status) |
| { |
| switch (status) |
| { |
| case PTHDB_SUCCESS: return "SUCCESS"; |
| case PTHDB_NOSYS: return "NOSYS"; |
| case PTHDB_NOTSUP: return "NOTSUP"; |
| case PTHDB_BAD_VERSION: return "BAD_VERSION"; |
| case PTHDB_BAD_USER: return "BAD_USER"; |
| case PTHDB_BAD_SESSION: return "BAD_SESSION"; |
| case PTHDB_BAD_MODE: return "BAD_MODE"; |
| case PTHDB_BAD_FLAGS: return "BAD_FLAGS"; |
| case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK"; |
| case PTHDB_BAD_POINTER: return "BAD_POINTER"; |
| case PTHDB_BAD_CMD: return "BAD_CMD"; |
| case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD"; |
| case PTHDB_BAD_ATTR: return "BAD_ATTR"; |
| case PTHDB_BAD_MUTEX: return "BAD_MUTEX"; |
| case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR"; |
| case PTHDB_BAD_COND: return "BAD_COND"; |
| case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR"; |
| case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK"; |
| case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR"; |
| case PTHDB_BAD_KEY: return "BAD_KEY"; |
| case PTHDB_BAD_PTID: return "BAD_PTID"; |
| case PTHDB_BAD_TID: return "BAD_TID"; |
| case PTHDB_CALLBACK: return "CALLBACK"; |
| case PTHDB_CONTEXT: return "CONTEXT"; |
| case PTHDB_HELD: return "HELD"; |
| case PTHDB_NOT_HELD: return "NOT_HELD"; |
| case PTHDB_MEMORY: return "MEMORY"; |
| case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED"; |
| case PTHDB_SYMBOL: return "SYMBOL"; |
| case PTHDB_NOT_AVAIL: return "NOT_AVAIL"; |
| case PTHDB_INTERNAL: return "INTERNAL"; |
| default: return "UNKNOWN"; |
| } |
| } |
| |
| /* A call to ptrace(REQ, ID, ...) just returned RET. Check for |
| exceptional conditions and either return nonlocally or else return |
| 1 for success and 0 for failure. */ |
| |
| static int |
| ptrace_check (int req, int id, int ret) |
| { |
| if (ret == 0 && !errno) |
| return 1; |
| |
| /* According to ptrace(2), ptrace may fail with EPERM if "the |
| Identifier parameter corresponds to a kernel thread which is |
| stopped in kernel mode and whose computational state cannot be |
| read or written." This happens quite often with register reads. */ |
| |
| switch (req) |
| { |
| case PTT_READ_GPRS: |
| case PTT_READ_FPRS: |
| case PTT_READ_SPRS: |
| if (ret == -1 && errno == EPERM) |
| { |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "ptrace (%d, %d) = %d (errno = %d)\n", |
| req, id, ret, errno); |
| return ret == -1 ? 0 : 1; |
| } |
| break; |
| } |
| error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"), |
| req, id, ret, errno, safe_strerror (errno)); |
| return 0; /* Not reached. */ |
| } |
| |
| /* Call ptracex (REQ, ID, ADDR, DATA, BUF) or |
| ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64. |
| Return success. */ |
| |
| #ifdef HAVE_PTRACE64 |
| # define ptracex(request, pid, addr, data, buf) \ |
| ptrace64 (request, pid, addr, data, buf) |
| #endif |
| |
| static int |
| ptrace64aix (int req, int id, long long addr, int data, int *buf) |
| { |
| errno = 0; |
| return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); |
| } |
| |
| /* Call ptrace (REQ, ID, ADDR, DATA, BUF) or |
| ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64. |
| Return success. */ |
| |
| #ifdef HAVE_PTRACE64 |
| # define ptrace(request, pid, addr, data, buf) \ |
| ptrace64 (request, pid, addr, data, buf) |
| # define addr_ptr long long |
| #else |
| # define addr_ptr int * |
| #endif |
| |
| static int |
| ptrace32 (int req, int id, addr_ptr addr, int data, int *buf) |
| { |
| errno = 0; |
| return ptrace_check (req, id, |
| ptrace (req, id, addr, data, buf)); |
| } |
| |
| /* If *PIDP is a composite process/thread id, convert it to a |
| process id. */ |
| |
| static void |
| pid_to_prc (ptid_t *ptidp) |
| { |
| ptid_t ptid; |
| |
| ptid = *ptidp; |
| if (PD_TID (ptid)) |
| *ptidp = ptid_t (ptid.pid ()); |
| } |
| |
| /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to |
| the address of SYMBOLS[<i>].name. */ |
| |
| static int |
| pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) |
| { |
| struct bound_minimal_symbol ms; |
| int i; |
| char *name; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n", |
| user, (long) symbols, count); |
| |
| for (i = 0; i < count; i++) |
| { |
| name = symbols[i].name; |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| " symbols[%d].name = \"%s\"\n", i, name); |
| |
| if (!*name) |
| symbols[i].addr = 0; |
| else |
| { |
| ms = lookup_minimal_symbol (name, NULL, NULL); |
| if (ms.minsym == NULL) |
| { |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n"); |
| return PDC_FAILURE; |
| } |
| symbols[i].addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| } |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n", |
| i, hex_string (symbols[i].addr)); |
| } |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n"); |
| return PDC_SUCCESS; |
| } |
| |
| /* Read registers call back function should be able to read the |
| context information of a debuggee kernel thread from an active |
| process or from a core file. The information should be formatted |
| in context64 form for both 32-bit and 64-bit process. |
| If successful return 0, else non-zero is returned. */ |
| |
| static int |
| pdc_read_regs (pthdb_user_t user, |
| pthdb_tid_t tid, |
| unsigned long long flags, |
| pthdb_context_t *context) |
| { |
| /* This function doesn't appear to be used, so we could probably |
| just return 0 here. HOWEVER, if it is not defined, the OS will |
| complain and several thread debug functions will fail. In case |
| this is needed, I have implemented what I think it should do, |
| however this code is untested. */ |
| |
| uint64_t gprs64[ppc_num_gprs]; |
| uint32_t gprs32[ppc_num_gprs]; |
| double fprs[ppc_num_fprs]; |
| struct ptxsprs sprs64; |
| struct ptsprs sprs32; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n", |
| (int) tid, hex_string (flags)); |
| |
| /* General-purpose registers. */ |
| if (flags & PTHDB_FLAG_GPRS) |
| { |
| if (arch64) |
| { |
| if (!ptrace64aix (PTT_READ_GPRS, tid, |
| (unsigned long) gprs64, 0, NULL)) |
| memset (gprs64, 0, sizeof (gprs64)); |
| memcpy (context->gpr, gprs64, sizeof(gprs64)); |
| } |
| else |
| { |
| if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL)) |
| memset (gprs32, 0, sizeof (gprs32)); |
| memcpy (context->gpr, gprs32, sizeof(gprs32)); |
| } |
| } |
| |
| /* Floating-point registers. */ |
| if (flags & PTHDB_FLAG_FPRS) |
| { |
| if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL)) |
| memset (fprs, 0, sizeof (fprs)); |
| memcpy (context->fpr, fprs, sizeof(fprs)); |
| } |
| |
| /* Special-purpose registers. */ |
| if (flags & PTHDB_FLAG_SPRS) |
| { |
| if (arch64) |
| { |
| if (!ptrace64aix (PTT_READ_SPRS, tid, |
| (unsigned long) &sprs64, 0, NULL)) |
| memset (&sprs64, 0, sizeof (sprs64)); |
| memcpy (&context->msr, &sprs64, sizeof(sprs64)); |
| } |
| else |
| { |
| if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL)) |
| memset (&sprs32, 0, sizeof (sprs32)); |
| memcpy (&context->msr, &sprs32, sizeof(sprs32)); |
| } |
| } |
| return 0; |
| } |
| |
| /* Write register function should be able to write requested context |
| information to specified debuggee's kernel thread id. |
| If successful return 0, else non-zero is returned. */ |
| |
| static int |
| pdc_write_regs (pthdb_user_t user, |
| pthdb_tid_t tid, |
| unsigned long long flags, |
| pthdb_context_t *context) |
| { |
| /* This function doesn't appear to be used, so we could probably |
| just return 0 here. HOWEVER, if it is not defined, the OS will |
| complain and several thread debug functions will fail. In case |
| this is needed, I have implemented what I think it should do, |
| however this code is untested. */ |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n", |
| (int) tid, hex_string (flags)); |
| |
| /* General-purpose registers. */ |
| if (flags & PTHDB_FLAG_GPRS) |
| { |
| if (arch64) |
| ptrace64aix (PTT_WRITE_GPRS, tid, |
| (unsigned long) context->gpr, 0, NULL); |
| else |
| ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) context->gpr, 0, NULL); |
| } |
| |
| /* Floating-point registers. */ |
| if (flags & PTHDB_FLAG_FPRS) |
| { |
| ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) context->fpr, 0, NULL); |
| } |
| |
| /* Special-purpose registers. */ |
| if (flags & PTHDB_FLAG_SPRS) |
| { |
| if (arch64) |
| { |
| ptrace64aix (PTT_WRITE_SPRS, tid, |
| (unsigned long) &context->msr, 0, NULL); |
| } |
| else |
| { |
| ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &context->msr, 0, NULL); |
| } |
| } |
| return 0; |
| } |
| |
| /* pthdb callback: read LEN bytes from process ADDR into BUF. */ |
| |
| static int |
| pdc_read_data (pthdb_user_t user, void *buf, |
| pthdb_addr_t addr, size_t len) |
| { |
| int status, ret; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| user, (long) buf, hex_string (addr), len); |
| |
| status = target_read_memory (addr, (gdb_byte *) buf, len); |
| ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", |
| status, pd_status2str (ret)); |
| return ret; |
| } |
| |
| /* pthdb callback: write LEN bytes from BUF to process ADDR. */ |
| |
| static int |
| pdc_write_data (pthdb_user_t user, void *buf, |
| pthdb_addr_t addr, size_t len) |
| { |
| int status, ret; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n", |
| user, (long) buf, hex_string (addr), len); |
| |
| status = target_write_memory (addr, (gdb_byte *) buf, len); |
| ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status, |
| pd_status2str (ret)); |
| return ret; |
| } |
| |
| /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it |
| in BUFP. */ |
| |
| static int |
| pdc_alloc (pthdb_user_t user, size_t len, void **bufp) |
| { |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n", |
| user, len, (long) bufp); |
| *bufp = xmalloc (len); |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| " malloc returned 0x%lx\n", (long) *bufp); |
| |
| /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never |
| be returned. */ |
| |
| return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| } |
| |
| /* pthdb callback: reallocate BUF, which was allocated by the alloc or |
| realloc callback, so that it contains LEN bytes, and store a |
| pointer to the result in BUFP. */ |
| |
| static int |
| pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) |
| { |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n", |
| user, (long) buf, len, (long) bufp); |
| *bufp = xrealloc (buf, len); |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| " realloc returned 0x%lx\n", (long) *bufp); |
| return *bufp ? PDC_SUCCESS : PDC_FAILURE; |
| } |
| |
| /* pthdb callback: free BUF, which was allocated by the alloc or |
| realloc callback. */ |
| |
| static int |
| pdc_dealloc (pthdb_user_t user, void *buf) |
| { |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "pdc_free (user = %ld, buf = 0x%lx)\n", user, |
| (long) buf); |
| xfree (buf); |
| return PDC_SUCCESS; |
| } |
| |
| /* Return a printable representation of pthread STATE. */ |
| |
| static char * |
| state2str (pthdb_state_t state) |
| { |
| switch (state) |
| { |
| case PST_IDLE: |
| /* i18n: Like "Thread-Id %d, [state] idle" */ |
| return _("idle"); /* being created */ |
| case PST_RUN: |
| /* i18n: Like "Thread-Id %d, [state] running" */ |
| return _("running"); /* running */ |
| case PST_SLEEP: |
| /* i18n: Like "Thread-Id %d, [state] sleeping" */ |
| return _("sleeping"); /* awaiting an event */ |
| case PST_READY: |
| /* i18n: Like "Thread-Id %d, [state] ready" */ |
| return _("ready"); /* runnable */ |
| case PST_TERM: |
| /* i18n: Like "Thread-Id %d, [state] finished" */ |
| return _("finished"); /* awaiting a join/detach */ |
| default: |
| /* i18n: Like "Thread-Id %d, [state] unknown" */ |
| return _("unknown"); |
| } |
| } |
| |
| /* qsort() comparison function for sorting pd_thread structs by pthid. */ |
| |
| static int |
| pcmp (const void *p1v, const void *p2v) |
| { |
| struct pd_thread *p1 = (struct pd_thread *) p1v; |
| struct pd_thread *p2 = (struct pd_thread *) p2v; |
| return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; |
| } |
| |
| /* iterate_over_threads() callback for counting GDB threads. |
| |
| Do not count the main thread (whose tid is zero). This matches |
| the list of threads provided by the pthreaddebug library, which |
| does not include that main thread either, and thus allows us |
| to compare the two lists. */ |
| |
| static int |
| giter_count (struct thread_info *thread, void *countp) |
| { |
| if (PD_TID (thread->ptid)) |
| (*(int *) countp)++; |
| return 0; |
| } |
| |
| /* iterate_over_threads() callback for accumulating GDB thread pids. |
| |
| Do not include the main thread (whose tid is zero). This matches |
| the list of threads provided by the pthreaddebug library, which |
| does not include that main thread either, and thus allows us |
| to compare the two lists. */ |
| |
| static int |
| giter_accum (struct thread_info *thread, void *bufp) |
| { |
| if (PD_TID (thread->ptid)) |
| { |
| **(struct thread_info ***) bufp = thread; |
| (*(struct thread_info ***) bufp)++; |
| } |
| return 0; |
| } |
| |
| /* ptid comparison function */ |
| |
| static int |
| ptid_cmp (ptid_t ptid1, ptid_t ptid2) |
| { |
| if (ptid1.pid () < ptid2.pid ()) |
| return -1; |
| else if (ptid1.pid () > ptid2.pid ()) |
| return 1; |
| else if (ptid1.tid () < ptid2.tid ()) |
| return -1; |
| else if (ptid1.tid () > ptid2.tid ()) |
| return 1; |
| else if (ptid1.lwp () < ptid2.lwp ()) |
| return -1; |
| else if (ptid1.lwp () > ptid2.lwp ()) |
| return 1; |
| else |
| return 0; |
| } |
| |
| /* qsort() comparison function for sorting thread_info structs by pid. */ |
| |
| static int |
| gcmp (const void *t1v, const void *t2v) |
| { |
| struct thread_info *t1 = *(struct thread_info **) t1v; |
| struct thread_info *t2 = *(struct thread_info **) t2v; |
| return ptid_cmp (t1->ptid, t2->ptid); |
| } |
| |
| /* Search through the list of all kernel threads for the thread |
| that has stopped on a SIGTRAP signal, and return its TID. |
| Return 0 if none found. */ |
| |
| static pthdb_tid_t |
| get_signaled_thread (void) |
| { |
| struct thrdsinfo64 thrinf; |
| tid_t ktid = 0; |
| |
| while (1) |
| { |
| if (getthrds (inferior_ptid.pid (), &thrinf, |
| sizeof (thrinf), &ktid, 1) != 1) |
| break; |
| |
| if (thrinf.ti_cursig == SIGTRAP) |
| return thrinf.ti_tid; |
| } |
| |
| /* Didn't find any thread stopped on a SIGTRAP signal. */ |
| return 0; |
| } |
| |
| /* Synchronize GDB's thread list with libpthdebug's. |
| |
| There are some benefits of doing this every time the inferior stops: |
| |
| - allows users to run thread-specific commands without needing to |
| run "info threads" first |
| |
| - helps pthdb_tid_pthread() work properly (see "libpthdebug |
| peculiarities" at the top of this module) |
| |
| - simplifies the demands placed on libpthdebug, which seems to |
| have difficulty with certain call patterns */ |
| |
| static void |
| sync_threadlists (void) |
| { |
| int cmd, status, infpid; |
| int pcount, psize, pi, gcount, gi; |
| struct pd_thread *pbuf; |
| struct thread_info **gbuf, **g, *thread; |
| pthdb_pthread_t pdtid; |
| pthread_t pthid; |
| pthdb_tid_t tid; |
| |
| /* Accumulate an array of libpthdebug threads sorted by pthread id. */ |
| |
| pcount = 0; |
| psize = 1; |
| pbuf = XNEWVEC (struct pd_thread, psize); |
| |
| for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT) |
| { |
| status = pthdb_pthread (pd_session, &pdtid, cmd); |
| if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD) |
| break; |
| |
| status = pthdb_pthread_ptid (pd_session, pdtid, &pthid); |
| if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID) |
| continue; |
| |
| if (pcount == psize) |
| { |
| psize *= 2; |
| pbuf = (struct pd_thread *) xrealloc (pbuf, |
| psize * sizeof *pbuf); |
| } |
| pbuf[pcount].pdtid = pdtid; |
| pbuf[pcount].pthid = pthid; |
| pcount++; |
| } |
| |
| for (pi = 0; pi < pcount; pi++) |
| { |
| status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid); |
| if (status != PTHDB_SUCCESS) |
| tid = PTHDB_INVALID_TID; |
| pbuf[pi].tid = tid; |
| } |
| |
| qsort (pbuf, pcount, sizeof *pbuf, pcmp); |
| |
| /* Accumulate an array of GDB threads sorted by pid. */ |
| |
| gcount = 0; |
| iterate_over_threads (giter_count, &gcount); |
| g = gbuf = XNEWVEC (struct thread_info *, gcount); |
| iterate_over_threads (giter_accum, &g); |
| qsort (gbuf, gcount, sizeof *gbuf, gcmp); |
| |
| /* Apply differences between the two arrays to GDB's thread list. */ |
| |
| infpid = inferior_ptid.pid (); |
| for (pi = gi = 0; pi < pcount || gi < gcount;) |
| { |
| if (pi == pcount) |
| { |
| delete_thread (gbuf[gi]); |
| gi++; |
| } |
| else if (gi == gcount) |
| { |
| aix_thread_info *priv = new aix_thread_info; |
| priv->pdtid = pbuf[pi].pdtid; |
| priv->tid = pbuf[pi].tid; |
| |
| process_stratum_target *proc_target |
| = current_inferior ()->process_target (); |
| thread = add_thread_with_info (proc_target, |
| ptid_t (infpid, 0, pbuf[pi].pthid), |
| priv); |
| |
| pi++; |
| } |
| else |
| { |
| ptid_t pptid, gptid; |
| int cmp_result; |
| |
| pptid = ptid_t (infpid, 0, pbuf[pi].pthid); |
| gptid = gbuf[gi]->ptid; |
| pdtid = pbuf[pi].pdtid; |
| tid = pbuf[pi].tid; |
| |
| cmp_result = ptid_cmp (pptid, gptid); |
| |
| if (cmp_result == 0) |
| { |
| aix_thread_info *priv = get_aix_thread_info (gbuf[gi]); |
| |
| priv->pdtid = pdtid; |
| priv->tid = tid; |
| pi++; |
| gi++; |
| } |
| else if (cmp_result > 0) |
| { |
| delete_thread (gbuf[gi]); |
| gi++; |
| } |
| else |
| { |
| process_stratum_target *proc_target |
| = current_inferior ()->process_target (); |
| thread = add_thread (proc_target, pptid); |
| |
| aix_thread_info *priv = new aix_thread_info; |
| thread->priv.reset (priv); |
| priv->pdtid = pdtid; |
| priv->tid = tid; |
| pi++; |
| } |
| } |
| } |
| |
| xfree (pbuf); |
| xfree (gbuf); |
| } |
| |
| /* Iterate_over_threads() callback for locating a thread, using |
| the TID of its associated kernel thread. */ |
| |
| static int |
| iter_tid (struct thread_info *thread, void *tidp) |
| { |
| const pthdb_tid_t tid = *(pthdb_tid_t *)tidp; |
| aix_thread_info *priv = get_aix_thread_info (thread); |
| |
| return priv->tid == tid; |
| } |
| |
| /* Synchronize libpthdebug's state with the inferior and with GDB, |
| generate a composite process/thread <pid> for the current thread, |
| set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */ |
| |
| static ptid_t |
| pd_update (int set_infpid) |
| { |
| int status; |
| ptid_t ptid; |
| pthdb_tid_t tid; |
| struct thread_info *thread = NULL; |
| |
| if (!pd_active) |
| return inferior_ptid; |
| |
| status = pthdb_session_update (pd_session); |
| if (status != PTHDB_SUCCESS) |
| return inferior_ptid; |
| |
| sync_threadlists (); |
| |
| /* Define "current thread" as one that just received a trap signal. */ |
| |
| tid = get_signaled_thread (); |
| if (tid != 0) |
| thread = iterate_over_threads (iter_tid, &tid); |
| if (!thread) |
| ptid = inferior_ptid; |
| else |
| { |
| ptid = thread->ptid; |
| if (set_infpid) |
| switch_to_thread (thread); |
| } |
| return ptid; |
| } |
| |
| /* Try to start debugging threads in the current process. |
| If successful and SET_INFPID, set inferior_ptid to reflect the |
| current thread. */ |
| |
| static ptid_t |
| pd_activate (int set_infpid) |
| { |
| int status; |
| |
| status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT, |
| PTHDB_FLAG_REGS, &pd_callbacks, |
| &pd_session); |
| if (status != PTHDB_SUCCESS) |
| { |
| return inferior_ptid; |
| } |
| pd_active = 1; |
| return pd_update (set_infpid); |
| } |
| |
| /* Undo the effects of pd_activate(). */ |
| |
| static void |
| pd_deactivate (void) |
| { |
| if (!pd_active) |
| return; |
| pthdb_session_destroy (pd_session); |
| |
| pid_to_prc (&inferior_ptid); |
| pd_active = 0; |
| } |
| |
| /* An object file has just been loaded. Check whether the current |
| application is pthreaded, and if so, prepare for thread debugging. */ |
| |
| static void |
| pd_enable (void) |
| { |
| int status; |
| char *stub_name; |
| struct bound_minimal_symbol ms; |
| |
| /* Don't initialize twice. */ |
| if (pd_able) |
| return; |
| |
| /* Check application word size. */ |
| arch64 = register_size (target_gdbarch (), 0) == 8; |
| |
| /* Check whether the application is pthreaded. */ |
| stub_name = NULL; |
| status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS, |
| &pd_callbacks, &stub_name); |
| if ((status != PTHDB_SUCCESS |
| && status != PTHDB_NOT_PTHREADED) || !stub_name) |
| return; |
| |
| /* Set a breakpoint on the returned stub function. */ |
| ms = lookup_minimal_symbol (stub_name, NULL, NULL); |
| if (ms.minsym == NULL) |
| return; |
| pd_brk_addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| if (!create_thread_event_breakpoint (target_gdbarch (), pd_brk_addr)) |
| return; |
| |
| /* Prepare for thread debugging. */ |
| current_inferior ()->push_target (&aix_thread_ops); |
| pd_able = 1; |
| |
| /* If we're debugging a core file or an attached inferior, the |
| pthread library may already have been initialized, so try to |
| activate thread debugging. */ |
| pd_activate (1); |
| } |
| |
| /* Undo the effects of pd_enable(). */ |
| |
| static void |
| pd_disable (void) |
| { |
| if (!pd_able) |
| return; |
| if (pd_active) |
| pd_deactivate (); |
| pd_able = 0; |
| current_inferior ()->unpush_target (&aix_thread_ops); |
| } |
| |
| /* new_objfile observer callback. |
| |
| If OBJFILE is non-null, check whether a threaded application is |
| being debugged, and if so, prepare for thread debugging. |
| |
| If OBJFILE is null, stop debugging threads. */ |
| |
| static void |
| new_objfile (struct objfile *objfile) |
| { |
| if (objfile) |
| pd_enable (); |
| else |
| pd_disable (); |
| } |
| |
| /* Attach to process specified by ARGS. */ |
| |
| static void |
| aix_thread_inferior_created (inferior *inf) |
| { |
| pd_enable (); |
| } |
| |
| /* Detach from the process attached to by aix_thread_attach(). */ |
| |
| void |
| aix_thread_target::detach (inferior *inf, int from_tty) |
| { |
| target_ops *beneath = this->beneath (); |
| |
| pd_disable (); |
| beneath->detach (inf, from_tty); |
| } |
| |
| /* Tell the inferior process to continue running thread PID if != -1 |
| and all threads otherwise. */ |
| |
| void |
| aix_thread_target::resume (ptid_t ptid, int step, enum gdb_signal sig) |
| { |
| struct thread_info *thread; |
| pthdb_tid_t tid[2]; |
| |
| if (!PD_TID (ptid)) |
| { |
| scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| |
| inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| beneath ()->resume (ptid, step, sig); |
| } |
| else |
| { |
| thread = find_thread_ptid (current_inferior (), ptid); |
| if (!thread) |
| error (_("aix-thread resume: unknown pthread %ld"), |
| ptid.lwp ()); |
| |
| aix_thread_info *priv = get_aix_thread_info (thread); |
| |
| tid[0] = priv->tid; |
| if (tid[0] == PTHDB_INVALID_TID) |
| error (_("aix-thread resume: no tid for pthread %ld"), |
| ptid.lwp ()); |
| tid[1] = 0; |
| |
| if (arch64) |
| ptrace64aix (PTT_CONTINUE, tid[0], (long long) 1, |
| gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) tid); |
| else |
| ptrace32 (PTT_CONTINUE, tid[0], (addr_ptr) 1, |
| gdb_signal_to_host (sig), (PTRACE_TYPE_ARG5) tid); |
| } |
| } |
| |
| /* Wait for thread/process ID if != -1 or for any thread otherwise. |
| If an error occurs, return -1, else return the pid of the stopped |
| thread. */ |
| |
| ptid_t |
| aix_thread_target::wait (ptid_t ptid, struct target_waitstatus *status, |
| target_wait_flags options) |
| { |
| { |
| scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| |
| pid_to_prc (&ptid); |
| |
| inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| ptid = beneath ()->wait (ptid, status, options); |
| } |
| |
| if (ptid.pid () == -1) |
| return ptid_t (-1); |
| |
| /* Check whether libpthdebug might be ready to be initialized. */ |
| if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED |
| && status->value.sig == GDB_SIGNAL_TRAP) |
| { |
| process_stratum_target *proc_target |
| = current_inferior ()->process_target (); |
| struct regcache *regcache = get_thread_regcache (proc_target, ptid); |
| struct gdbarch *gdbarch = regcache->arch (); |
| |
| if (regcache_read_pc (regcache) |
| - gdbarch_decr_pc_after_break (gdbarch) == pd_brk_addr) |
| return pd_activate (0); |
| } |
| |
| return pd_update (0); |
| } |
| |
| /* Record that the 64-bit general-purpose registers contain VALS. */ |
| |
| static void |
| supply_gprs64 (struct regcache *regcache, uint64_t *vals) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| int regno; |
| |
| for (regno = 0; regno < ppc_num_gprs; regno++) |
| regcache->raw_supply (tdep->ppc_gp0_regnum + regno, |
| (char *) (vals + regno)); |
| } |
| |
| /* Record that 32-bit register REGNO contains VAL. */ |
| |
| static void |
| supply_reg32 (struct regcache *regcache, int regno, uint32_t val) |
| { |
| regcache->raw_supply (regno, (char *) &val); |
| } |
| |
| /* Record that the floating-point registers contain VALS. */ |
| |
| static void |
| supply_fprs (struct regcache *regcache, double *vals) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| int regno; |
| |
| /* This function should never be called on architectures without |
| floating-point registers. */ |
| gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| |
| for (regno = tdep->ppc_fp0_regnum; |
| regno < tdep->ppc_fp0_regnum + ppc_num_fprs; |
| regno++) |
| regcache->raw_supply (regno, |
| (char *) (vals + regno - tdep->ppc_fp0_regnum)); |
| } |
| |
| /* Predicate to test whether given register number is a "special" register. */ |
| static int |
| special_register_p (struct gdbarch *gdbarch, int regno) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| return regno == gdbarch_pc_regnum (gdbarch) |
| || regno == tdep->ppc_ps_regnum |
| || regno == tdep->ppc_cr_regnum |
| || regno == tdep->ppc_lr_regnum |
| || regno == tdep->ppc_ctr_regnum |
| || regno == tdep->ppc_xer_regnum |
| || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum) |
| || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum); |
| } |
| |
| |
| /* Record that the special registers contain the specified 64-bit and |
| 32-bit values. */ |
| |
| static void |
| supply_sprs64 (struct regcache *regcache, |
| uint64_t iar, uint64_t msr, uint32_t cr, |
| uint64_t lr, uint64_t ctr, uint32_t xer, |
| uint32_t fpscr) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar); |
| regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr); |
| regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr); |
| regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr); |
| regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr); |
| regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer); |
| if (tdep->ppc_fpscr_regnum >= 0) |
| regcache->raw_supply (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
| } |
| |
| /* Record that the special registers contain the specified 32-bit |
| values. */ |
| |
| static void |
| supply_sprs32 (struct regcache *regcache, |
| uint32_t iar, uint32_t msr, uint32_t cr, |
| uint32_t lr, uint32_t ctr, uint32_t xer, |
| uint32_t fpscr) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| regcache->raw_supply (gdbarch_pc_regnum (gdbarch), (char *) &iar); |
| regcache->raw_supply (tdep->ppc_ps_regnum, (char *) &msr); |
| regcache->raw_supply (tdep->ppc_cr_regnum, (char *) &cr); |
| regcache->raw_supply (tdep->ppc_lr_regnum, (char *) &lr); |
| regcache->raw_supply (tdep->ppc_ctr_regnum, (char *) &ctr); |
| regcache->raw_supply (tdep->ppc_xer_regnum, (char *) &xer); |
| if (tdep->ppc_fpscr_regnum >= 0) |
| regcache->raw_supply (tdep->ppc_fpscr_regnum, (char *) &fpscr); |
| } |
| |
| /* Fetch all registers from pthread PDTID, which doesn't have a kernel |
| thread. |
| |
| There's no way to query a single register from a non-kernel |
| pthread, so there's no need for a single-register version of this |
| function. */ |
| |
| static void |
| fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| int status, i; |
| pthdb_context_t ctx; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "fetch_regs_user_thread %lx\n", (long) pdtid); |
| status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| if (status != PTHDB_SUCCESS) |
| error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"), |
| pd_status2str (status)); |
| |
| /* General-purpose registers. */ |
| |
| if (arch64) |
| supply_gprs64 (regcache, ctx.gpr); |
| else |
| for (i = 0; i < ppc_num_gprs; i++) |
| supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]); |
| |
| /* Floating-point registers. */ |
| |
| if (ppc_floating_point_unit_p (gdbarch)) |
| supply_fprs (regcache, ctx.fpr); |
| |
| /* Special registers. */ |
| |
| if (arch64) |
| supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| ctx.xer, ctx.fpscr); |
| else |
| supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, |
| ctx.xer, ctx.fpscr); |
| } |
| |
| /* Fetch register REGNO if != -1 or all registers otherwise from |
| kernel thread TID. |
| |
| AIX provides a way to query all of a kernel thread's GPRs, FPRs, or |
| SPRs, but there's no way to query individual registers within those |
| groups. Therefore, if REGNO != -1, this function fetches an entire |
| group. |
| |
| Unfortunately, kernel thread register queries often fail with |
| EPERM, indicating that the thread is in kernel space. This breaks |
| backtraces of threads other than the current one. To make that |
| breakage obvious without throwing an error to top level (which is |
| bad e.g. during "info threads" output), zero registers that can't |
| be retrieved. */ |
| |
| static void |
| fetch_regs_kernel_thread (struct regcache *regcache, int regno, |
| pthdb_tid_t tid) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| uint64_t gprs64[ppc_num_gprs]; |
| uint32_t gprs32[ppc_num_gprs]; |
| double fprs[ppc_num_fprs]; |
| struct ptxsprs sprs64; |
| struct ptsprs sprs32; |
| int i; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n", |
| (long) tid, regno, arch64); |
| |
| /* General-purpose registers. */ |
| if (regno == -1 |
| || (tdep->ppc_gp0_regnum <= regno |
| && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)) |
| { |
| if (arch64) |
| { |
| if (!ptrace64aix (PTT_READ_GPRS, tid, |
| (unsigned long) gprs64, 0, NULL)) |
| memset (gprs64, 0, sizeof (gprs64)); |
| supply_gprs64 (regcache, gprs64); |
| } |
| else |
| { |
| if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL)) |
| memset (gprs32, 0, sizeof (gprs32)); |
| for (i = 0; i < ppc_num_gprs; i++) |
| supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]); |
| } |
| } |
| |
| /* Floating-point registers. */ |
| |
| if (ppc_floating_point_unit_p (gdbarch) |
| && (regno == -1 |
| || (regno >= tdep->ppc_fp0_regnum |
| && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| { |
| if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL)) |
| memset (fprs, 0, sizeof (fprs)); |
| supply_fprs (regcache, fprs); |
| } |
| |
| /* Special-purpose registers. */ |
| |
| if (regno == -1 || special_register_p (gdbarch, regno)) |
| { |
| if (arch64) |
| { |
| if (!ptrace64aix (PTT_READ_SPRS, tid, |
| (unsigned long) &sprs64, 0, NULL)) |
| memset (&sprs64, 0, sizeof (sprs64)); |
| supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr, |
| sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr, |
| sprs64.pt_xer, sprs64.pt_fpscr); |
| } |
| else |
| { |
| if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL)) |
| memset (&sprs32, 0, sizeof (sprs32)); |
| supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr, |
| sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer, |
| sprs32.pt_fpscr); |
| |
| if (tdep->ppc_mq_regnum >= 0) |
| regcache->raw_supply (tdep->ppc_mq_regnum, (char *) &sprs32.pt_mq); |
| } |
| } |
| } |
| |
| /* Fetch register REGNO if != -1 or all registers otherwise from the |
| thread/process connected to REGCACHE. */ |
| |
| void |
| aix_thread_target::fetch_registers (struct regcache *regcache, int regno) |
| { |
| struct thread_info *thread; |
| pthdb_tid_t tid; |
| |
| if (!PD_TID (regcache->ptid ())) |
| beneath ()->fetch_registers (regcache, regno); |
| else |
| { |
| thread = find_thread_ptid (current_inferior (), regcache->ptid ()); |
| aix_thread_info *priv = get_aix_thread_info (thread); |
| tid = priv->tid; |
| |
| if (tid == PTHDB_INVALID_TID) |
| fetch_regs_user_thread (regcache, priv->pdtid); |
| else |
| fetch_regs_kernel_thread (regcache, regno, tid); |
| } |
| } |
| |
| /* Store the gp registers into an array of uint32_t or uint64_t. */ |
| |
| static void |
| fill_gprs64 (const struct regcache *regcache, uint64_t *vals) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| int regno; |
| |
| for (regno = 0; regno < ppc_num_gprs; regno++) |
| if (REG_VALID == regcache->get_register_status |
| (tdep->ppc_gp0_regnum + regno)) |
| regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno); |
| } |
| |
| static void |
| fill_gprs32 (const struct regcache *regcache, uint32_t *vals) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| int regno; |
| |
| for (regno = 0; regno < ppc_num_gprs; regno++) |
| if (REG_VALID == regcache->get_register_status |
| (tdep->ppc_gp0_regnum + regno)) |
| regcache->raw_collect (tdep->ppc_gp0_regnum + regno, vals + regno); |
| } |
| |
| /* Store the floating point registers into a double array. */ |
| static void |
| fill_fprs (const struct regcache *regcache, double *vals) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| int regno; |
| |
| /* This function should never be called on architectures without |
| floating-point registers. */ |
| gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
| |
| for (regno = tdep->ppc_fp0_regnum; |
| regno < tdep->ppc_fp0_regnum + ppc_num_fprs; |
| regno++) |
| if (REG_VALID == regcache->get_register_status (regno)) |
| regcache->raw_collect (regno, vals + regno - tdep->ppc_fp0_regnum); |
| } |
| |
| /* Store the special registers into the specified 64-bit and 32-bit |
| locations. */ |
| |
| static void |
| fill_sprs64 (const struct regcache *regcache, |
| uint64_t *iar, uint64_t *msr, uint32_t *cr, |
| uint64_t *lr, uint64_t *ctr, uint32_t *xer, |
| uint32_t *fpscr) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| /* Verify that the size of the size of the IAR buffer is the |
| same as the raw size of the PC (in the register cache). If |
| they're not, then either GDB has been built incorrectly, or |
| there's some other kind of internal error. To be really safe, |
| we should check all of the sizes. */ |
| gdb_assert (sizeof (*iar) == register_size |
| (gdbarch, gdbarch_pc_regnum (gdbarch))); |
| |
| if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch))) |
| regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| regcache->raw_collect (tdep->ppc_ps_regnum, msr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| regcache->raw_collect (tdep->ppc_cr_regnum, cr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| regcache->raw_collect (tdep->ppc_lr_regnum, lr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| regcache->raw_collect (tdep->ppc_ctr_regnum, ctr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| regcache->raw_collect (tdep->ppc_xer_regnum, xer); |
| if (tdep->ppc_fpscr_regnum >= 0 |
| && REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum)) |
| regcache->raw_collect (tdep->ppc_fpscr_regnum, fpscr); |
| } |
| |
| static void |
| fill_sprs32 (const struct regcache *regcache, |
| uint32_t *iar, uint32_t *msr, uint32_t *cr, |
| uint32_t *lr, uint32_t *ctr, uint32_t *xer, |
| uint32_t *fpscr) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| /* Verify that the size of the size of the IAR buffer is the |
| same as the raw size of the PC (in the register cache). If |
| they're not, then either GDB has been built incorrectly, or |
| there's some other kind of internal error. To be really safe, |
| we should check all of the sizes. */ |
| gdb_assert (sizeof (*iar) == register_size (gdbarch, |
| gdbarch_pc_regnum (gdbarch))); |
| |
| if (REG_VALID == regcache->get_register_status (gdbarch_pc_regnum (gdbarch))) |
| regcache->raw_collect (gdbarch_pc_regnum (gdbarch), iar); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| regcache->raw_collect (tdep->ppc_ps_regnum, msr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| regcache->raw_collect (tdep->ppc_cr_regnum, cr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| regcache->raw_collect (tdep->ppc_lr_regnum, lr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| regcache->raw_collect (tdep->ppc_ctr_regnum, ctr); |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| regcache->raw_collect (tdep->ppc_xer_regnum, xer); |
| if (tdep->ppc_fpscr_regnum >= 0 |
| && REG_VALID == regcache->get_register_status (tdep->ppc_fpscr_regnum)) |
| regcache->raw_collect (tdep->ppc_fpscr_regnum, fpscr); |
| } |
| |
| /* Store all registers into pthread PDTID, which doesn't have a kernel |
| thread. |
| |
| It's possible to store a single register into a non-kernel pthread, |
| but I doubt it's worth the effort. */ |
| |
| static void |
| store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| int status, i; |
| pthdb_context_t ctx; |
| uint32_t int32; |
| uint64_t int64; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "store_regs_user_thread %lx\n", (long) pdtid); |
| |
| /* Retrieve the thread's current context for its non-register |
| values. */ |
| status = pthdb_pthread_context (pd_session, pdtid, &ctx); |
| if (status != PTHDB_SUCCESS) |
| error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"), |
| pd_status2str (status)); |
| |
| /* Collect general-purpose register values from the regcache. */ |
| |
| for (i = 0; i < ppc_num_gprs; i++) |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_gp0_regnum + i)) |
| { |
| if (arch64) |
| { |
| regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int64); |
| ctx.gpr[i] = int64; |
| } |
| else |
| { |
| regcache->raw_collect (tdep->ppc_gp0_regnum + i, (void *) &int32); |
| ctx.gpr[i] = int32; |
| } |
| } |
| |
| /* Collect floating-point register values from the regcache. */ |
| if (ppc_floating_point_unit_p (gdbarch)) |
| fill_fprs (regcache, ctx.fpr); |
| |
| /* Special registers (always kept in ctx as 64 bits). */ |
| if (arch64) |
| { |
| fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, |
| &ctx.xer, &ctx.fpscr); |
| } |
| else |
| { |
| /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32. |
| Solution: use 32-bit temp variables. */ |
| uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| tmp_fpscr; |
| |
| fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr, |
| &tmp_xer, &tmp_fpscr); |
| if (REG_VALID == regcache->get_register_status |
| (gdbarch_pc_regnum (gdbarch))) |
| ctx.iar = tmp_iar; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ps_regnum)) |
| ctx.msr = tmp_msr; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_cr_regnum)) |
| ctx.cr = tmp_cr; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_lr_regnum)) |
| ctx.lr = tmp_lr; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_ctr_regnum)) |
| ctx.ctr = tmp_ctr; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| ctx.xer = tmp_xer; |
| if (REG_VALID == regcache->get_register_status (tdep->ppc_xer_regnum)) |
| ctx.fpscr = tmp_fpscr; |
| } |
| |
| status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx); |
| if (status != PTHDB_SUCCESS) |
| error (_("aix-thread: store_registers: " |
| "pthdb_pthread_setcontext returned %s"), |
| pd_status2str (status)); |
| } |
| |
| /* Store register REGNO if != -1 or all registers otherwise into |
| kernel thread TID. |
| |
| AIX provides a way to set all of a kernel thread's GPRs, FPRs, or |
| SPRs, but there's no way to set individual registers within those |
| groups. Therefore, if REGNO != -1, this function stores an entire |
| group. */ |
| |
| static void |
| store_regs_kernel_thread (const struct regcache *regcache, int regno, |
| pthdb_tid_t tid) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| uint64_t gprs64[ppc_num_gprs]; |
| uint32_t gprs32[ppc_num_gprs]; |
| double fprs[ppc_num_fprs]; |
| struct ptxsprs sprs64; |
| struct ptsprs sprs32; |
| |
| if (debug_aix_thread) |
| fprintf_unfiltered (gdb_stdlog, |
| "store_regs_kernel_thread tid=%lx regno=%d\n", |
| (long) tid, regno); |
| |
| /* General-purpose registers. */ |
| if (regno == -1 |
| || (tdep->ppc_gp0_regnum <= regno |
| && regno < tdep->ppc_gp0_regnum + ppc_num_fprs)) |
| { |
| if (arch64) |
| { |
| /* Pre-fetch: some regs may not be in the cache. */ |
| ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| fill_gprs64 (regcache, gprs64); |
| ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL); |
| } |
| else |
| { |
| /* Pre-fetch: some regs may not be in the cache. */ |
| ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL); |
| fill_gprs32 (regcache, gprs32); |
| ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) gprs32, 0, NULL); |
| } |
| } |
| |
| /* Floating-point registers. */ |
| |
| if (ppc_floating_point_unit_p (gdbarch) |
| && (regno == -1 |
| || (regno >= tdep->ppc_fp0_regnum |
| && regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| { |
| /* Pre-fetch: some regs may not be in the cache. */ |
| ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL); |
| fill_fprs (regcache, fprs); |
| ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) fprs, 0, NULL); |
| } |
| |
| /* Special-purpose registers. */ |
| |
| if (regno == -1 || special_register_p (gdbarch, regno)) |
| { |
| if (arch64) |
| { |
| /* Pre-fetch: some registers won't be in the cache. */ |
| ptrace64aix (PTT_READ_SPRS, tid, |
| (unsigned long) &sprs64, 0, NULL); |
| fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr, |
| &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr, |
| &sprs64.pt_xer, &sprs64.pt_fpscr); |
| ptrace64aix (PTT_WRITE_SPRS, tid, |
| (unsigned long) &sprs64, 0, NULL); |
| } |
| else |
| { |
| /* The contents of "struct ptspr" were declared as "unsigned |
| long" up to AIX 5.2, but are "unsigned int" since 5.3. |
| Use temporaries to work around this problem. Also, add an |
| assert here to make sure we fail if the system header files |
| use "unsigned long", and the size of that type is not what |
| the headers expect. */ |
| uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer, |
| tmp_fpscr; |
| |
| gdb_assert (sizeof (sprs32.pt_iar) == 4); |
| |
| /* Pre-fetch: some registers won't be in the cache. */ |
| ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL); |
| |
| fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, |
| &tmp_ctr, &tmp_xer, &tmp_fpscr); |
| |
| sprs32.pt_iar = tmp_iar; |
| sprs32.pt_msr = tmp_msr; |
| sprs32.pt_cr = tmp_cr; |
| sprs32.pt_lr = tmp_lr; |
| sprs32.pt_ctr = tmp_ctr; |
| sprs32.pt_xer = tmp_xer; |
| sprs32.pt_fpscr = tmp_fpscr; |
| |
| if (tdep->ppc_mq_regnum >= 0) |
| if (REG_VALID == regcache->get_register_status |
| (tdep->ppc_mq_regnum)) |
| regcache->raw_collect (tdep->ppc_mq_regnum, &sprs32.pt_mq); |
| |
| ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &sprs32, 0, NULL); |
| } |
| } |
| } |
| |
| /* Store gdb's current view of the register set into the |
| thread/process connected to REGCACHE. */ |
| |
| void |
| aix_thread_target::store_registers (struct regcache *regcache, int regno) |
| { |
| struct thread_info *thread; |
| pthdb_tid_t tid; |
| |
| if (!PD_TID (regcache->ptid ())) |
| beneath ()->store_registers (regcache, regno); |
| else |
| { |
| thread = find_thread_ptid (current_inferior (), regcache->ptid ()); |
| aix_thread_info *priv = get_aix_thread_info (thread); |
| tid = priv->tid; |
| |
| if (tid == PTHDB_INVALID_TID) |
| store_regs_user_thread (regcache, priv->pdtid); |
| else |
| store_regs_kernel_thread (regcache, regno, tid); |
| } |
| } |
| |
| /* Implement the to_xfer_partial target_ops method. */ |
| |
| enum target_xfer_status |
| aix_thread_target::xfer_partial (enum target_object object, |
| const char *annex, gdb_byte *readbuf, |
| const gdb_byte *writebuf, |
| ULONGEST offset, ULONGEST len, |
| ULONGEST *xfered_len) |
| { |
| scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| |
| inferior_ptid = ptid_t (inferior_ptid.pid ()); |
| return beneath ()->xfer_partial (object, annex, readbuf, |
| writebuf, offset, len, xfered_len); |
| } |
| |
| /* Clean up after the inferior exits. */ |
| |
| void |
| aix_thread_target::mourn_inferior () |
| { |
| target_ops *beneath = this->beneath (); |
| |
| pd_deactivate (); |
| beneath->mourn_inferior (); |
| } |
| |
| /* Return whether thread PID is still valid. */ |
| |
| bool |
| aix_thread_target::thread_alive (ptid_t ptid) |
| { |
| if (!PD_TID (ptid)) |
| return beneath ()->thread_alive (ptid); |
| |
| /* We update the thread list every time the child stops, so all |
| valid threads should be in the thread list. */ |
| process_stratum_target *proc_target |
| = current_inferior ()->process_target (); |
| return in_thread_list (proc_target, ptid); |
| } |
| |
| /* Return a printable representation of composite PID for use in |
| "info threads" output. */ |
| |
| std::string |
| aix_thread_target::pid_to_str (ptid_t ptid) |
| { |
| if (!PD_TID (ptid)) |
| return beneath ()->pid_to_str (ptid); |
| |
| return string_printf (_("Thread %ld"), ptid.tid ()); |
| } |
| |
| /* Return a printable representation of extra information about |
| THREAD, for use in "info threads" output. */ |
| |
| const char * |
| aix_thread_target::extra_thread_info (struct thread_info *thread) |
| { |
| int status; |
| pthdb_pthread_t pdtid; |
| pthdb_tid_t tid; |
| pthdb_state_t state; |
| pthdb_suspendstate_t suspendstate; |
| pthdb_detachstate_t detachstate; |
| int cancelpend; |
| static char *ret = NULL; |
| |
| if (!PD_TID (thread->ptid)) |
| return NULL; |
| |
| string_file buf; |
| aix_thread_info *priv = get_aix_thread_info (thread); |
| |
| pdtid = priv->pdtid; |
| tid = priv->tid; |
| |
| if (tid != PTHDB_INVALID_TID) |
| /* i18n: Like "thread-identifier %d, [state] running, suspended" */ |
| buf.printf (_("tid %d"), (int)tid); |
| |
| status = pthdb_pthread_state (pd_session, pdtid, &state); |
| if (status != PTHDB_SUCCESS) |
| state = PST_NOTSUP; |
| buf.printf (", %s", state2str (state)); |
| |
| status = pthdb_pthread_suspendstate (pd_session, pdtid, |
| &suspendstate); |
| if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) |
| /* i18n: Like "Thread-Id %d, [state] running, suspended" */ |
| buf.printf (_(", suspended")); |
| |
| status = pthdb_pthread_detachstate (pd_session, pdtid, |
| &detachstate); |
| if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) |
| /* i18n: Like "Thread-Id %d, [state] running, detached" */ |
| buf.printf (_(", detached")); |
| |
| pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend); |
| if (status == PTHDB_SUCCESS && cancelpend) |
| /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */ |
| buf.printf (_(", cancel pending")); |
| |
| buf.write ("", 1); |
| |
| xfree (ret); /* Free old buffer. */ |
| |
| ret = xstrdup (buf.c_str ()); |
| |
| return ret; |
| } |
| |
| ptid_t |
| aix_thread_target::get_ada_task_ptid (long lwp, ULONGEST thread) |
| { |
| return ptid_t (inferior_ptid.pid (), 0, thread); |
| } |
| |
| |
| /* Module startup initialization function, automagically called by |
| init.c. */ |
| |
| void _initialize_aix_thread (); |
| void |
| _initialize_aix_thread () |
| { |
| /* Notice when object files get loaded and unloaded. */ |
| gdb::observers::new_objfile.attach (new_objfile, "aix-thread"); |
| |
| /* Add ourselves to inferior_created event chain. |
| This is needed to enable the thread target on "attach". */ |
| gdb::observers::inferior_created.attach (aix_thread_inferior_created, |
| "aix-thread"); |
| |
| add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread, |
| _("Set debugging of AIX thread module."), |
| _("Show debugging of AIX thread module."), |
| _("Enables debugging output (used to debug GDB)."), |
| NULL, NULL, |
| /* FIXME: i18n: Debugging of AIX thread |
| module is \"%d\". */ |
| &setdebuglist, &showdebuglist); |
| } |