diff options
Diffstat (limited to 'gdb/aix-thread.c')
-rw-r--r-- | gdb/aix-thread.c | 476 |
1 files changed, 262 insertions, 214 deletions
diff --git a/gdb/aix-thread.c b/gdb/aix-thread.c index a067db3..bac1347 100644 --- a/gdb/aix-thread.c +++ b/gdb/aix-thread.c @@ -31,13 +31,13 @@ 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_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(). + - pthdb_tid_pthread() doesn't always work after + pthdb_session_update(), but it does work after cycling through + all threads using pthdb_pthread(). */ @@ -63,15 +63,15 @@ #include <sched.h> #include <sys/pthdebug.h> -/* Whether to emit debugging output. */ +/* Whether to emit debugging output. */ static int debug_aix_thread; -/* in AIX 5.1, functions use pthdb_tid_t instead of tid_t */ +/* 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. */ +/* Return whether to treat PID as a debuggable thread id. */ #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0) @@ -82,23 +82,23 @@ static int debug_aix_thread; #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP) /* pthdb_user_t value that we pass to pthdb functions. 0 causes - PTHDB_BAD_USER errors, so use 1. */ + PTHDB_BAD_USER errors, so use 1. */ #define PD_USER 1 -/* Success and failure values returned by pthdb callbacks. */ +/* 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. */ +/* Private data attached to each element in GDB's thread list. */ struct private_thread_info { - pthdb_pthread_t pdtid; /* thread's libpthdebug id */ + pthdb_pthread_t pdtid; /* thread's libpthdebug id */ pthdb_tid_t tid; /* kernel thread id */ }; -/* Information about a thread of which libpthdebug is aware. */ +/* Information about a thread of which libpthdebug is aware. */ struct pd_thread { pthdb_pthread_t pdtid; @@ -106,52 +106,54 @@ struct pd_thread { pthdb_tid_t tid; }; -/* This module's target-specific operations, active while pd_able is true. */ +/* This module's target-specific operations, active while pd_able is true. */ static struct target_ops ops; -/* Copy of the target over which ops is pushed. This is - more convenient than a pointer to child_ops or core_ops, because - they lack current_target's default callbacks. */ +/* Copy of the target over which ops is pushed. + This is more convenient than a pointer to child_ops or core_ops, + because they lack current_target's default callbacks. */ static struct target_ops base_ops; -/* Address of the function that libpthread will call when libpthdebug is - ready to be initialized. */ +/* 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. */ +/* Whether the current application is debuggable by pthdb. */ static int pd_able = 0; -/* Whether a threaded application is being debugged. */ +/* 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. */ +/* Whether the current architecture is 64-bit. + Only valid when pd_able is true. */ static int arch64; -/* Saved pointer to previous owner of target_new_objfile_hook. */ +/* Saved pointer to previous owner of target_new_objfile_hook. */ static void (*target_new_objfile_chain)(struct objfile *); -/* Forward declarations for pthdb callbacks. */ +/* 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); + 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); + 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. */ +/* pthdb callbacks. */ static pthdb_callbacks_t pd_callbacks = { pdc_symbol_addrs, @@ -165,11 +167,12 @@ static pthdb_callbacks_t pd_callbacks = { NULL }; -/* Current pthdb session. */ +/* Current pthdb session. */ static pthdb_session_t pd_session; -/* Return a printable representation of pthdebug function return STATUS. */ +/* Return a printable representation of pthdebug function return + STATUS. */ static char * pd_status2str (int status) @@ -211,9 +214,9 @@ pd_status2str (int status) } } -/* 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. */ +/* 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) @@ -221,10 +224,10 @@ 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. */ + /* 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) { @@ -234,7 +237,8 @@ ptrace_check (int req, int id, int ret) if (ret == -1 && errno == EPERM) { if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, "ptrace (%d, %d) = %d (errno = %d)", + fprintf_unfiltered (gdb_stdlog, + "ptrace (%d, %d) = %d (errno = %d)", req, id, ret, errno); return ret == -1 ? 0 : 1; } @@ -242,10 +246,10 @@ ptrace_check (int req, int id, int ret) } error ("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)", req, id, ret, errno, safe_strerror (errno)); - return 0; /* not reached. */ + return 0; /* Not reached. */ } -/* Call ptracex(REQ, ID, ADDR, DATA, BUF). Return success. */ +/* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */ static int ptrace64aix (int req, int id, long long addr, int data, int *buf) @@ -254,16 +258,18 @@ ptrace64aix (int req, int id, long long addr, int data, int *buf) return ptrace_check (req, id, ptracex (req, id, addr, data, buf)); } -/* Call ptrace(REQ, ID, ADDR, DATA, BUF). Return success. */ +/* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */ static int ptrace32 (int req, int id, int *addr, int data, int *buf) { errno = 0; - return ptrace_check (req, id, ptrace (req, id, (int *)addr, data, buf)); + return ptrace_check (req, id, + ptrace (req, id, (int *)addr, data, buf)); } -/* If *PIDP is a composite process/thread id, convert it to a process id. */ +/* If *PIDP is a composite process/thread id, convert it to a + process id. */ static void pid_to_prc (ptid_t *ptidp) @@ -275,8 +281,8 @@ pid_to_prc (ptid_t *ptidp) *ptidp = pid_to_ptid (PIDGET (ptid)); } -/* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to the - address of SYMBOLS[<i>].name. */ +/* 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) @@ -294,7 +300,8 @@ pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) { name = symbols[i].name; if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " symbols[%d].name = \"%s\"", i, name); + fprintf_unfiltered (gdb_stdlog, + " symbols[%d].name = \"%s\"", i, name); if (!*name) symbols[i].addr = 0; @@ -317,22 +324,24 @@ pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count) 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. */ +/* 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. */ + /* 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[32]; uint32_t gprs32[32]; double fprs[32]; @@ -343,12 +352,13 @@ pdc_read_regs (pthdb_user_t user, fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%llx\n", (int)tid, flags); - /* General-purpose registers. */ + /* General-purpose registers. */ if (flags & PTHDB_FLAG_GPRS) { if (arch64) { - if (!ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL)) + if (!ptrace64aix (PTT_READ_GPRS, tid, + (unsigned long) gprs64, 0, NULL)) memset (gprs64, 0, sizeof (gprs64)); memcpy (context->gpr, gprs64, sizeof(gprs64)); } @@ -360,7 +370,7 @@ pdc_read_regs (pthdb_user_t user, } } - /* Floating-point registers. */ + /* Floating-point registers. */ if (flags & PTHDB_FLAG_FPRS) { if (!ptrace32 (PTT_READ_FPRS, tid, (int *) fprs, 0, NULL)) @@ -368,12 +378,13 @@ pdc_read_regs (pthdb_user_t user, memcpy (context->fpr, fprs, sizeof(fprs)); } - /* Special-purpose registers. */ + /* Special-purpose registers. */ if (flags & PTHDB_FLAG_SPRS) { if (arch64) { - if (!ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL)) + if (!ptrace64aix (PTT_READ_SPRS, tid, + (unsigned long) &sprs64, 0, NULL)) memset (&sprs64, 0, sizeof (sprs64)); memcpy (&context->msr, &sprs64, sizeof(sprs64)); } @@ -387,46 +398,49 @@ pdc_read_regs (pthdb_user_t user, 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. */ +/* 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. */ + /* 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=%llx\n", (int)tid, flags); - /* General-purpose registers. */ + /* General-purpose registers. */ if (flags & PTHDB_FLAG_GPRS) { if (arch64) - ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long)context->gpr, 0, NULL); + ptrace64aix (PTT_WRITE_GPRS, tid, + (unsigned long)context->gpr, 0, NULL); else ptrace32 (PTT_WRITE_GPRS, tid, (int *)context->gpr, 0, NULL); } - /* Floating-point registers. */ + /* Floating-point registers. */ if (flags & PTHDB_FLAG_FPRS) { ptrace32 (PTT_WRITE_FPRS, tid, (int *)context->fpr, 0, NULL); } - /* Special-purpose registers. */ + /* Special-purpose registers. */ if (flags & PTHDB_FLAG_SPRS) { if (arch64) { - ptrace64aix (PTT_WRITE_SPRS, tid, (unsigned long) &context->msr, 0, NULL); + ptrace64aix (PTT_WRITE_SPRS, tid, + (unsigned long) &context->msr, 0, NULL); } else { @@ -436,10 +450,11 @@ pdc_write_regs (pthdb_user_t user, return 0; } -/* pthdb callback: read LEN bytes from process ADDR into BUF. */ +/* 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) +pdc_read_data (pthdb_user_t user, void *buf, + pthdb_addr_t addr, size_t len) { int status, ret; @@ -452,15 +467,16 @@ pdc_read_data (pthdb_user_t user, void *buf, pthdb_addr_t addr, size_t len) ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE; if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s", status, - pd_status2str (ret)); + fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s", + status, pd_status2str (ret)); return ret; } -/* pthdb callback: write LEN bytes from BUF to process ADDR. */ +/* 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) +pdc_write_data (pthdb_user_t user, void *buf, + pthdb_addr_t addr, size_t len) { int status, ret; @@ -478,8 +494,8 @@ pdc_write_data (pthdb_user_t user, void *buf, pthdb_addr_t addr, size_t len) return ret; } -/* pthdb callback: allocate a LEN-byte buffer and store a pointer to it in - BUFP. */ +/* 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) @@ -490,15 +506,18 @@ pdc_alloc (pthdb_user_t user, size_t len, void **bufp) user, len, (long) bufp); *bufp = xmalloc (len); if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " malloc returned 0x%lx", (long) *bufp); - /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never be - returned. */ + fprintf_unfiltered (gdb_stdlog, + " malloc returned 0x%lx", (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. */ +/* 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) @@ -509,24 +528,26 @@ pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp) user, (long) buf, len, (long) bufp); *bufp = xrealloc (buf, len); if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, " realloc returned 0x%lx", (long) *bufp); + fprintf_unfiltered (gdb_stdlog, + " realloc returned 0x%lx", (long) *bufp); return *bufp ? PDC_SUCCESS : PDC_FAILURE; } -/* pthdb callback: free BUF, which was allocated by the alloc or realloc - callback. */ +/* 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)", user, + fprintf_unfiltered (gdb_stdlog, + "pdc_free (user = %ld, buf = 0x%lx)", user, (long) buf); xfree (buf); return PDC_SUCCESS; } -/* Return a printable representation of pthread STATE. */ +/* Return a printable representation of pthread STATE. */ static char * state2str (pthdb_state_t state) @@ -542,7 +563,7 @@ state2str (pthdb_state_t state) } } -/* qsort() comparison function for sorting pd_thread structs by pthid. */ +/* qsort() comparison function for sorting pd_thread structs by pthid. */ static int pcmp (const void *p1v, const void *p2v) @@ -552,7 +573,7 @@ pcmp (const void *p1v, const void *p2v) return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid; } -/* iterate_over_threads() callback for counting GDB threads. */ +/* iterate_over_threads() callback for counting GDB threads. */ static int giter_count (struct thread_info *thread, void *countp) @@ -561,7 +582,7 @@ giter_count (struct thread_info *thread, void *countp) return 0; } -/* iterate_over_threads() callback for accumulating GDB thread pids. */ +/* iterate_over_threads() callback for accumulating GDB thread pids. */ static int giter_accum (struct thread_info *thread, void *bufp) @@ -572,6 +593,7 @@ giter_accum (struct thread_info *thread, void *bufp) } /* ptid comparison function */ + static int ptid_cmp (ptid_t ptid1, ptid_t ptid2) { @@ -593,7 +615,7 @@ ptid_cmp (ptid_t ptid1, ptid_t ptid2) return 0; } -/* qsort() comparison function for sorting thread_info structs by pid. */ +/* qsort() comparison function for sorting thread_info structs by pid. */ static int gcmp (const void *t1v, const void *t2v) @@ -607,14 +629,14 @@ gcmp (const void *t1v, const void *t2v) 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 + - 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 */ + - simplifies the demands placed on libpthdebug, which seems to + have difficulty with certain call patterns */ static void sync_threadlists (void) @@ -627,7 +649,7 @@ sync_threadlists (void) pthread_t pthid; pthdb_tid_t tid; - /* Accumulate an array of libpthdebug threads sorted by pthread id. */ + /* Accumulate an array of libpthdebug threads sorted by pthread id. */ pcount = 0; psize = 1; @@ -646,7 +668,8 @@ sync_threadlists (void) if (pcount == psize) { psize *= 2; - pbuf = (struct pd_thread *) xrealloc (pbuf, psize * sizeof *pbuf); + pbuf = (struct pd_thread *) xrealloc (pbuf, + psize * sizeof *pbuf); } pbuf[pcount].pdtid = pdtid; pbuf[pcount].pthid = pthid; @@ -663,7 +686,7 @@ sync_threadlists (void) qsort (pbuf, pcount, sizeof *pbuf, pcmp); - /* Accumulate an array of GDB threads sorted by pid. */ + /* Accumulate an array of GDB threads sorted by pid. */ gcount = 0; iterate_over_threads (giter_count, &gcount); @@ -671,7 +694,7 @@ sync_threadlists (void) iterate_over_threads (giter_accum, &g); qsort (gbuf, gcount, sizeof *gbuf, gcmp); - /* Apply differences between the two arrays to GDB's thread list. */ + /* Apply differences between the two arrays to GDB's thread list. */ infpid = PIDGET (inferior_ptid); for (pi = gi = 0; pi < pcount || gi < gcount;) @@ -728,8 +751,8 @@ sync_threadlists (void) xfree (gbuf); } -/* iterate_over_threads() callback for locating a thread whose kernel thread - just received a trap signal. */ +/* Iterate_over_threads() callback for locating a thread whose kernel + thread just received a trap signal. */ static int iter_trap (struct thread_info *thread, void *unused) @@ -737,22 +760,24 @@ iter_trap (struct thread_info *thread, void *unused) struct thrdsinfo64 thrinf; pthdb_tid_t tid; - /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ - extern int getthrds (pid_t, struct thrdsinfo64 *, int, pthdb_tid_t *, int); + /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ + extern int getthrds (pid_t, struct thrdsinfo64 *, + int, pthdb_tid_t *, int); tid = thread->private->tid; if (tid == PTHDB_INVALID_TID) return 0; - if (getthrds (PIDGET (inferior_ptid), &thrinf, sizeof (thrinf), &tid, 1) != 1) + if (getthrds (PIDGET (inferior_ptid), &thrinf, + sizeof (thrinf), &tid, 1) != 1) return 0; return thrinf.ti_cursig == SIGTRAP; } -/* 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>. */ +/* 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) @@ -770,7 +795,7 @@ pd_update (int set_infpid) sync_threadlists (); - /* Define "current thread" as one that just received a trap signal. */ + /* Define "current thread" as one that just received a trap signal. */ thread = iterate_over_threads (iter_trap, NULL); if (!thread) @@ -784,8 +809,9 @@ pd_update (int set_infpid) return ptid; } -/* Try to start debugging threads in the current process. If successful and - SET_INFPID, set inferior_ptid to reflect the current thread. */ +/* 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) @@ -793,7 +819,8 @@ 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); + PTHDB_FLAG_REGS, &pd_callbacks, + &pd_session); if (status != PTHDB_SUCCESS) { return inferior_ptid; @@ -802,7 +829,7 @@ pd_activate (int set_infpid) return pd_update (set_infpid); } -/* Undo the effects of pd_activate(). */ +/* Undo the effects of pd_activate(). */ static void pd_deactivate (void) @@ -815,8 +842,8 @@ pd_deactivate (void) pd_active = 0; } -/* An object file has just been loaded. Check whether the current application - is pthreaded, and if so, prepare for thread debugging. */ +/* 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) @@ -825,39 +852,40 @@ pd_enable (void) char *stub_name; struct minimal_symbol *ms; - /* Don't initialize twice. */ + /* Don't initialize twice. */ if (pd_able) return; - /* Check application word size. */ + /* Check application word size. */ arch64 = REGISTER_RAW_SIZE (0) == 8; - /* Check whether the application is pthreaded. */ + /* 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) + 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. */ + /* Set a breakpoint on the returned stub function. */ if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL))) return; pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms); if (!create_thread_event_breakpoint (pd_brk_addr)) return; - /* Prepare for thread debugging. */ + /* Prepare for thread debugging. */ base_ops = current_target; push_target (&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. */ + /* 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(). */ +/* Undo the effects of pd_enable(). */ static void pd_disable (void) @@ -872,10 +900,10 @@ pd_disable (void) /* target_new_objfile_hook callback. - If OBJFILE is non-null, check whether a threaded application is being - debugged, and if so, prepare for thread debugging. + 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. */ + If OBJFILE is null, stop debugging threads. */ static void new_objfile (struct objfile *objfile) @@ -889,7 +917,7 @@ new_objfile (struct objfile *objfile) target_new_objfile_chain (objfile); } -/* Attach to process specified by ARGS. */ +/* Attach to process specified by ARGS. */ static void ops_attach (char *args, int from_tty) @@ -898,7 +926,7 @@ ops_attach (char *args, int from_tty) pd_activate (1); } -/* Detach from the process attached to by ops_attach(). */ +/* Detach from the process attached to by ops_attach(). */ static void ops_detach (char *args, int from_tty) @@ -908,7 +936,7 @@ ops_detach (char *args, int from_tty) } /* Tell the inferior process to continue running thread PID if != -1 - and all threads otherwise. */ + and all threads otherwise. */ static void ops_resume (ptid_t ptid, int step, enum target_signal sig) @@ -927,23 +955,27 @@ ops_resume (ptid_t ptid, int step, enum target_signal sig) { thread = find_thread_pid (ptid); if (!thread) - error ("aix-thread resume: unknown pthread %ld", TIDGET (ptid)); + error ("aix-thread resume: unknown pthread %ld", + TIDGET (ptid)); tid[0] = thread->private->tid; if (tid[0] == PTHDB_INVALID_TID) - error ("aix-thread resume: no tid for pthread %ld", TIDGET (ptid)); + error ("aix-thread resume: no tid for pthread %ld", + TIDGET (ptid)); tid[1] = 0; if (arch64) - ptrace64aix (PTT_CONTINUE, tid[0], 1, target_signal_to_host (sig), (int *)tid); + ptrace64aix (PTT_CONTINUE, tid[0], 1, + target_signal_to_host (sig), (int *)tid); else ptrace32 (PTT_CONTINUE, tid[0], (int *) 1, target_signal_to_host (sig), (int *)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. */ +/* 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. */ static ptid_t ops_wait (ptid_t ptid, struct target_waitstatus *status) @@ -959,7 +991,7 @@ ops_wait (ptid_t ptid, struct target_waitstatus *status) if (PIDGET (ptid) == -1) return pid_to_ptid (-1); - /* Check whether libpthdebug might be ready to be initialized. */ + /* Check whether libpthdebug might be ready to be initialized. */ if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED && status->value.sig == TARGET_SIGNAL_TRAP && read_pc_pid (ptid) - DECR_PC_AFTER_BREAK == pd_brk_addr) @@ -968,7 +1000,7 @@ ops_wait (ptid_t ptid, struct target_waitstatus *status) return pd_update (0); } -/* Record that the 64-bit general-purpose registers contain VALS. */ +/* Record that the 64-bit general-purpose registers contain VALS. */ static void supply_gprs64 (uint64_t *vals) @@ -979,7 +1011,7 @@ supply_gprs64 (uint64_t *vals) supply_register (regno, (char *) (vals + regno)); } -/* Record that 32-bit register REGNO contains VAL. */ +/* Record that 32-bit register REGNO contains VAL. */ static void supply_reg32 (int regno, uint32_t val) @@ -987,7 +1019,7 @@ supply_reg32 (int regno, uint32_t val) supply_register (regno, (char *) &val); } -/* Record that the floating-point registers contain VALS. */ +/* Record that the floating-point registers contain VALS. */ static void supply_fprs (double *vals) @@ -998,8 +1030,8 @@ supply_fprs (double *vals) supply_register (regno + FP0_REGNUM, (char *) (vals + regno)); } -/* Record that the special registers contain the specified 64-bit and 32-bit - values. */ +/* Record that the special registers contain the specified 64-bit and + 32-bit values. */ static void supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, @@ -1014,7 +1046,8 @@ supply_sprs64 (uint64_t iar, uint64_t msr, uint32_t cr, supply_register (regno + 5, (char *) &xer); } -/* Record that the special registers contain the specified 32-bit values. */ +/* Record that the special registers contain the specified 32-bit + values. */ static void supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, @@ -1032,8 +1065,9 @@ supply_sprs32 (uint32_t iar, uint32_t msr, uint32_t cr, /* 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. */ + 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_lib (pthdb_pthread_t pdtid) @@ -1048,7 +1082,7 @@ fetch_regs_lib (pthdb_pthread_t pdtid) error ("aix-thread: fetch_registers: pthdb_pthread_context returned %s", pd_status2str (status)); - /* General-purpose registers. */ + /* General-purpose registers. */ if (arch64) supply_gprs64 (ctx.gpr); @@ -1056,11 +1090,11 @@ fetch_regs_lib (pthdb_pthread_t pdtid) for (i = 0; i < 32; i++) supply_reg32 (i, ctx.gpr[i]); - /* Floating-point registers. */ + /* Floating-point registers. */ supply_fprs (ctx.fpr); - /* Special registers. */ + /* Special registers. */ if (arch64) supply_sprs64 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer); @@ -1068,18 +1102,20 @@ fetch_regs_lib (pthdb_pthread_t pdtid) supply_sprs32 (ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr, ctx.xer); } -/* Fetch register REGNO if != -1 or all registers otherwise from kernel thread - TID. +/* 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. + 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. */ + 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_kern (int regno, pthdb_tid_t tid) @@ -1096,12 +1132,13 @@ fetch_regs_kern (int regno, pthdb_tid_t tid) "fetch_regs_kern tid=%lx regno=%d arch64=%d\n", (long)tid, regno, arch64); - /* General-purpose registers. */ + /* General-purpose registers. */ if (regno == -1 || regno < FP0_REGNUM) { if (arch64) { - if (!ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL)) + if (!ptrace64aix (PTT_READ_GPRS, tid, + (unsigned long) gprs64, 0, NULL)) memset (gprs64, 0, sizeof (gprs64)); supply_gprs64 (gprs64); } @@ -1114,7 +1151,7 @@ fetch_regs_kern (int regno, pthdb_tid_t tid) } } - /* Floating-point registers. */ + /* Floating-point registers. */ if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) { @@ -1123,13 +1160,15 @@ fetch_regs_kern (int regno, pthdb_tid_t tid) supply_fprs (fprs); } - /* Special-purpose registers. */ + /* Special-purpose registers. */ - if (regno == -1 || (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) + if (regno == -1 || + (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) { if (arch64) { - if (!ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL)) + if (!ptrace64aix (PTT_READ_SPRS, tid, + (unsigned long) &sprs64, 0, NULL)) memset (&sprs64, 0, sizeof (sprs64)); supply_sprs64 (sprs64.pt_iar, sprs64.pt_msr, sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr, sprs64.pt_xer); @@ -1148,7 +1187,7 @@ fetch_regs_kern (int regno, pthdb_tid_t tid) } /* Fetch register REGNO if != -1 or all registers otherwise in the - thread/process specified by inferior_ptid. */ + thread/process specified by inferior_ptid. */ static void ops_fetch_registers (int regno) @@ -1171,7 +1210,7 @@ ops_fetch_registers (int regno) } /* Store the special registers into the specified 64-bit and 32-bit - locations. */ + locations. */ static void fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, @@ -1189,8 +1228,8 @@ fill_sprs64 (uint64_t *iar, uint64_t *msr, uint32_t *cr, /* 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. */ + 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_lib (pthdb_pthread_t pdtid) @@ -1199,25 +1238,27 @@ store_regs_lib (pthdb_pthread_t pdtid) pthdb_context_t ctx; if (debug_aix_thread) - fprintf_unfiltered (gdb_stdlog, "store_regs_lib %lx\n", (long)pdtid); + fprintf_unfiltered (gdb_stdlog, + "store_regs_lib %lx\n", (long)pdtid); - /* Retrieve the thread's current context for its non-register values. */ + /* 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)); - /* General-purpose registers. */ + /* General-purpose registers. */ for (i = 0; i < 32; i++) ctx.gpr[i] = read_register (i); - /* Floating-point registers. */ + /* Floating-point registers. */ for (i = 0; i < 32; i++) ctx.fpr[i] = *(double *) ®isters[REGISTER_BYTE (FP0_REGNUM + i)]; - /* Special registers. */ + /* Special registers. */ fill_sprs64 (&ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr, &ctx.xer); @@ -1227,12 +1268,13 @@ store_regs_lib (pthdb_pthread_t pdtid) pd_status2str (status)); } -/* Store register REGNO if != -1 or all registers otherwise into kernel - thread TID. +/* 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. */ + 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_kern (int regno, pthdb_tid_t tid) @@ -1245,7 +1287,7 @@ store_regs_kern (int regno, pthdb_tid_t tid) fprintf_unfiltered (gdb_stdlog, "store_regs_kern tid=%lx regno=%d\n", (long)tid, regno); - /* General-purpose registers. */ + /* General-purpose registers. */ if (regno == -1 || regno < FP0_REGNUM) { regp = ®isters[REGISTER_BYTE (0)]; @@ -1255,7 +1297,7 @@ store_regs_kern (int regno, pthdb_tid_t tid) ptrace32 (PTT_WRITE_GPRS, tid, (int *) regp, 0, NULL); } - /* Floating-point registers. */ + /* Floating-point registers. */ if (regno == -1 || (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)) { @@ -1263,16 +1305,19 @@ store_regs_kern (int regno, pthdb_tid_t tid) ptrace32 (PTT_WRITE_FPRS, tid, (int *) regp, 0, NULL); } - /* Special-purpose registers. */ + /* Special-purpose registers. */ - if (regno == -1 || (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) + if (regno == -1 || + (regno > FPLAST_REGNUM && regno <= LAST_UISA_SP_REGNUM)) { if (arch64) { - ptrace64aix (PTT_READ_SPRS, tid, (unsigned long) &sprs64, 0, NULL); + ptrace64aix (PTT_READ_SPRS, tid, + (unsigned long) &sprs64, 0, NULL); fill_sprs64 (&sprs64.pt_iar, &sprs64.pt_msr, &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr, &sprs64.pt_xer); - ptrace64aix (PTT_WRITE_SPRS, tid, (unsigned long) &sprs64, 0, NULL); + ptrace64aix (PTT_WRITE_SPRS, tid, + (unsigned long) &sprs64, 0, NULL); } else { @@ -1294,8 +1339,8 @@ store_regs_kern (int regno, pthdb_tid_t tid) } } -/* Store gdb's current view of the register set into the thread/process - specified by inferior_ptid. */ +/* Store gdb's current view of the register set into the + thread/process specified by inferior_ptid. */ static void ops_store_registers (int regno) @@ -1317,7 +1362,7 @@ ops_store_registers (int regno) } } -/* Prepare to modify the registers array. */ +/* Prepare to modify the registers array. */ static void ops_prepare_to_store (void) @@ -1328,8 +1373,8 @@ ops_prepare_to_store (void) read_register_bytes (0, NULL, REGISTER_BYTES); } -/* Transfer LEN bytes of memory from GDB address MYADDR to target address - MEMADDR if WRITE and vice versa otherwise. */ +/* Transfer LEN bytes of memory from GDB address MYADDR to target + address MEMADDR if WRITE and vice versa otherwise. */ static int ops_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, @@ -1340,13 +1385,14 @@ ops_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, struct cleanup *cleanup = save_inferior_ptid (); inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid)); - n = base_ops.to_xfer_memory (memaddr, myaddr, len, write, attrib, &base_ops); + n = base_ops.to_xfer_memory (memaddr, myaddr, len, + write, attrib, &base_ops); do_cleanups (cleanup); return n; } -/* Kill and forget about the inferior process. */ +/* Kill and forget about the inferior process. */ static void ops_kill (void) @@ -1358,7 +1404,7 @@ ops_kill (void) do_cleanups (cleanup); } -/* Clean up after the inferior exits. */ +/* Clean up after the inferior exits. */ static void ops_mourn_inferior (void) @@ -1367,7 +1413,7 @@ ops_mourn_inferior (void) base_ops.to_mourn_inferior (); } -/* Return whether thread PID is still valid. */ +/* Return whether thread PID is still valid. */ static int ops_thread_alive (ptid_t ptid) @@ -1375,13 +1421,13 @@ ops_thread_alive (ptid_t ptid) if (!PD_TID (ptid)) return base_ops.to_thread_alive (ptid); - /* We update the thread list every time the child stops, so all valid - threads should be in the thread list. */ + /* We update the thread list every time the child stops, so all + valid threads should be in the thread list. */ return in_thread_list (ptid); } -/* Return a printable representation of composite PID for use in "info - threads" output. */ +/* Return a printable representation of composite PID for use in + "info threads" output. */ static char * ops_pid_to_str (ptid_t ptid) @@ -1399,8 +1445,8 @@ ops_pid_to_str (ptid_t ptid) return ret; } -/* Return a printable representation of extra information about THREAD, for - use in "info threads" output. */ +/* Return a printable representation of extra information about + THREAD, for use in "info threads" output. */ static char * ops_extra_thread_info (struct thread_info *thread) @@ -1432,11 +1478,13 @@ ops_extra_thread_info (struct thread_info *thread) state = PST_NOTSUP; fprintf_unfiltered (buf, ", %s", state2str (state)); - status = pthdb_pthread_suspendstate (pd_session, pdtid, &suspendstate); + status = pthdb_pthread_suspendstate (pd_session, pdtid, + &suspendstate); if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED) fprintf_unfiltered (buf, ", suspended"); - status = pthdb_pthread_detachstate (pd_session, pdtid, &detachstate); + status = pthdb_pthread_detachstate (pd_session, pdtid, + &detachstate); if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED) fprintf_unfiltered (buf, ", detached"); @@ -1454,7 +1502,7 @@ ops_extra_thread_info (struct thread_info *thread) return ret; } -/* Initialize target ops. */ +/* Initialize target ops. */ static void init_ops (void) @@ -1471,8 +1519,8 @@ init_ops (void) ops.to_store_registers = ops_store_registers; ops.to_prepare_to_store = ops_prepare_to_store; ops.to_xfer_memory = ops_xfer_memory; - /* No need for ops.to_create_inferior, because we activate thread debugging - when the inferior reaches pd_brk_addr. */ + /* No need for ops.to_create_inferior, because we activate thread + debugging when the inferior reaches pd_brk_addr. */ ops.to_kill = ops_kill; ops.to_mourn_inferior = ops_mourn_inferior; ops.to_thread_alive = ops_thread_alive; @@ -1483,7 +1531,7 @@ init_ops (void) } /* Module startup initialization function, automagically called by - init.c. */ + init.c. */ void _initialize_aix_thread (void) @@ -1491,7 +1539,7 @@ _initialize_aix_thread (void) init_ops (); add_target (&ops); - /* Notice when object files get loaded and unloaded. */ + /* Notice when object files get loaded and unloaded. */ target_new_objfile_chain = target_new_objfile_hook; target_new_objfile_hook = new_objfile; |