diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-profile.c | 88 | ||||
| -rw-r--r-- | elf/dl-runtime.c | 27 | ||||
| -rw-r--r-- | elf/sofini.c | 10 | ||||
| -rw-r--r-- | elf/soinit.c | 13 |
4 files changed, 86 insertions, 52 deletions
diff --git a/elf/dl-profile.c b/elf/dl-profile.c index 9b020e8fe9..dcbbcd026e 100644 --- a/elf/dl-profile.c +++ b/elf/dl-profile.c @@ -30,6 +30,7 @@ #include <sys/gmon.h> #include <sys/gmon_out.h> #include <sys/mman.h> +#include <sys/param.h> #include <sys/stat.h> #include <atomicity.h> @@ -97,7 +98,7 @@ ?? ?? ?? ?? <- ToPC#CGN 0038+(2*CN+2)*A+(CN-1)*4+K ?? ?? ?? ?? <- Count#CGN - We put (for now? no basic block information in the file since this would + We put (for now?) no basic block information in the file since this would introduce rase conditions among all the processes who want to write them. `K' is the number of count entries which is computed as @@ -140,10 +141,10 @@ static uint32_t narcs; currently in the mmaped file. At no point of time this has to be the same as NARCS. If it is equal all entries from the file are in our lists. */ -static uint32_t *narcsp; +static volatile uint32_t *narcsp; /* Description of the currently profiled object. */ -static long int state; +static long int state = GMON_PROF_OFF; static volatile uint16_t *kcount; static size_t kcountsize; @@ -260,13 +261,24 @@ _dl_start_profile (struct link_map *map, const char *output_dir) fd = __open (filename, O_RDWR | O_CREAT, 0666); if (fd == -1) - /* We cannot write the profiling data so don't do anthing. */ - return; + { + /* We cannot write the profiling data so don't do anthing. */ + char buf[400]; + _dl_sysdep_message (filename, ": cannot open file: ", + _strerror_internal (errno, buf, sizeof buf), + "\n", NULL); + return; + } if (fstat (fd, &st) < 0 || !S_ISREG (st.st_mode)) { /* Not stat'able or not a regular file => don't use it. */ - close (fd); + char buf[400]; + int errnum = errno; + __close (fd); + _dl_sysdep_message (filename, ": cannot stat file: ", + _strerror_internal (errnum, buf, sizeof buf), + "\n", NULL); return; } @@ -286,9 +298,9 @@ _dl_start_profile (struct link_map *map, const char *output_dir) cannot_create: errnum = errno; __close (fd); - _dl_sysdep_error (filename, ": cannot create file: ", - _strerror_internal (errnum, buf, sizeof buf), - "\n", NULL); + _dl_sysdep_message (filename, ": cannot create file: ", + _strerror_internal (errnum, buf, sizeof buf), + "\n", NULL); return; } @@ -304,9 +316,9 @@ _dl_start_profile (struct link_map *map, const char *output_dir) if (addr != NULL) __munmap ((void *) addr, expected_size); - _dl_sysdep_error (filename, - ": file is no correct profile data file for `", - _dl_profile, "'\n", NULL); + _dl_sysdep_message (filename, + ": file is no correct profile data file for `", + _dl_profile, "'\n", NULL); return; } @@ -317,9 +329,9 @@ _dl_start_profile (struct link_map *map, const char *output_dir) char buf[400]; int errnum = errno; __close (fd); - _dl_sysdep_error (filename, ": cannot map file: ", - _strerror_internal (errnum, buf, sizeof buf), - "\n", NULL); + _dl_sysdep_message (filename, ": cannot map file: ", + _strerror_internal (errnum, buf, sizeof buf), + "\n", NULL); return; } @@ -332,10 +344,8 @@ _dl_start_profile (struct link_map *map, const char *output_dir) + sizeof (struct gmon_hist_hdr)); /* Compute pointer to array of the arc information. */ - data = (struct here_cg_arc_record *) ((char *) kcount + kcountsize - + 2 * sizeof (uint32_t)); - narcsp = (uint32_t *) (hist + sizeof (uint32_t) - + sizeof (struct gmon_hist_hdr) + sizeof (uint32_t)); + narcsp = (uint32_t *) ((char *) kcount + kcountsize + sizeof (uint32_t)); + data = (struct here_cg_arc_record *) ((char *) narcsp + sizeof (uint32_t)); if (st.st_size == 0) { @@ -346,8 +356,7 @@ _dl_start_profile (struct link_map *map, const char *output_dir) memcpy (hist + sizeof (uint32_t), &hist_hdr, sizeof (struct gmon_hist_hdr)); - *(uint32_t *) (hist + sizeof (uint32_t) + sizeof (struct gmon_hist_hdr) - + kcountsize) = GMON_TAG_CG_ARC; + narcsp[-1] = GMON_TAG_CG_ARC; } else { @@ -356,18 +365,16 @@ _dl_start_profile (struct link_map *map, const char *output_dir) || *(uint32_t *) hist != GMON_TAG_TIME_HIST || memcmp (hist + sizeof (uint32_t), &hist_hdr, sizeof (struct gmon_hist_hdr)) != 0 - || (*(uint32_t *) (hist + sizeof (uint32_t) - + sizeof (struct gmon_hist_hdr) + kcountsize) - != GMON_TAG_CG_ARC)) + || narcsp[-1] != GMON_TAG_CG_ARC) goto wrong_format; } /* Allocate memory for the froms data and the pointer to the tos records. */ tos = (uint16_t *) calloc (tossize + fromssize, 1); - if (froms == NULL) + if (tos == NULL) { __munmap ((void *) addr, expected_size); - _dl_sysdep_fatal ("Out of memory while initializing profiler", NULL); + _dl_sysdep_fatal ("Out of memory while initializing profiler\n", NULL); /* NOTREACHED */ } @@ -381,13 +388,12 @@ _dl_start_profile (struct link_map *map, const char *output_dir) Loading the entries in reverse order should help to get the most frequently used entries at the front of the list. */ - for (idx = narcs = *narcsp; idx > 0; ) + for (idx = narcs = MIN (*narcsp, fromlimit); idx > 0; ) { size_t to_index; size_t newfromidx; --idx; - to_index = ((data[idx].self_pc - lowpc) - / (hashfraction * sizeof (*tos))); + to_index = (data[idx].self_pc / (hashfraction * sizeof (*tos))); newfromidx = fromidx++; froms[newfromidx].here = &data[idx]; froms[newfromidx].link = tos[to_index]; @@ -458,18 +464,18 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) fromp = &froms[fromp->link]; while (fromp->link != 0 && fromp->here->from_pc != frompc); - if (fromp->link == 0) + if (fromp->here->from_pc != frompc) { topcindex = &fromp->link; check_new_or_add: /* Our entry is not among the entries we read so far from the data file. Now see whether we have to update the list. */ - while (narcs != *narcsp) + while (narcs != *narcsp && narcs < fromlimit) { size_t to_index; size_t newfromidx; - to_index = ((data[narcs].self_pc - lowpc) + to_index = (data[narcs].self_pc / (hashfraction * sizeof (*tos))); newfromidx = fromidx++; froms[newfromidx].here = &data[narcs]; @@ -481,22 +487,22 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) /* If we still have no entry stop searching and insert. */ if (*topcindex == 0) { - fromidx = 1 + exchange_and_add (narcsp, 1); - ++narcs; + size_t newarc = 1 + exchange_and_add (narcsp, 1); /* In rare cases it could happen that all entries in FROMS are occupied. So we cannot count this anymore. */ - if (fromidx >= fromlimit) + if (newarc >= fromlimit) goto done; - *topcindex = fromindex; - fromp = &froms[fromindex]; - - fromp = &froms[fromp->link]; + fromp = &froms[*topcindex = fromidx++]; + fromp->here = &data[newarc]; + data[newarc].from_pc = frompc; + data[newarc].self_pc = selfpc; + data[newarc].count = 0; fromp->link = 0; - fromp->here->from_pc = frompc; - fromp->here->count = 0; + + narcs++; break; } diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c index 46c0e1b8ab..e7132ed832 100644 --- a/elf/dl-runtime.c +++ b/elf/dl-runtime.c @@ -130,6 +130,8 @@ fixup ( struct link_map **scope = _dl_object_relocation_scope (l); { + const struct r_found_version *here_version; + /* This macro is used as a callback from the elf_machine_relplt code. */ #define RESOLVE(ref, version, flags) \ ((version) != NULL && (version)->hash != 0 \ @@ -147,13 +149,13 @@ fixup ( l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr); ElfW(Half) ndx = version[ELFW(R_SYM) (reloc->r_info)]; - elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], - &l->l_versions[ndx], - (void *) rel_addr); + here_version = &l->l_versions[ndx]; } else - elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], - NULL, (void *) rel_addr); + here_version = NULL; + + elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], + here_version, (void *) rel_addr); } *_dl_global_scope_end = NULL; @@ -194,6 +196,8 @@ profile_fixup ( struct link_map **scope = _dl_object_relocation_scope (l); { + const struct r_found_version *here_version; + /* This macro is used as a callback from the elf_machine_relplt code. */ #define RESOLVE(ref, version, flags) \ ((version) != NULL && (version)->hash != 0 \ @@ -211,19 +215,20 @@ profile_fixup ( l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr); ElfW(Half) ndx = version[ELFW(R_SYM) (reloc->r_info)]; - elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], - &l->l_versions[ndx], (void *) &result); + here_version = &l->l_versions[ndx]; } else - elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], - NULL, (void *) &result); + here_version = NULL; + + elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)], + here_version, (void *) &result); } *_dl_global_scope_end = NULL; - (*mcount_fct) (retaddr, result); + (*mcount_fct) (retaddr, ELF_FIXUP_RETURN_VALUE (l, result)); /* Return the address that was written by the relocation. */ - return ELF_FIXUP_RETURN_VALUE(l, result); + return ELF_FIXUP_RETURN_VALUE (l, result); } #endif diff --git a/elf/sofini.c b/elf/sofini.c index e44041b5ec..6da0062d06 100644 --- a/elf/sofini.c +++ b/elf/sofini.c @@ -7,3 +7,13 @@ static void (*const __CTOR_END__[1]) (void) static void (*const __DTOR_END__[1]) (void) __attribute__ ((unused, section (".dtors"))) = { 0 }; + +#ifdef HAVE_DWARF2_UNWIND_INFO +/* Terminate the frame unwind info section with a 4byte 0 as a sentinel; + this would be the 'length' field in a real FDE. */ + +typedef unsigned int ui32 __attribute__ ((mode (SI))); +static const ui32 __FRAME_END__[1] + __attribute__ ((unused, section (".eh_frame"))) + = { 0 }; +#endif diff --git a/elf/soinit.c b/elf/soinit.c index 0310b74b93..0c3f5b3163 100644 --- a/elf/soinit.c +++ b/elf/soinit.c @@ -17,6 +17,13 @@ run_hooks (void (*const list[]) (void)) (**list) (); } +#ifdef HAVE_DWARF2_UNWIND_INFO +static const char __EH_FRAME_BEGIN__[] + __attribute__ ((section (".eh_frame"))) + = { }; +extern void __register_frame (const void *); +extern void __deregister_frame (const void *); +#endif /* This function will be called from _init in init-first.c. */ void @@ -24,6 +31,9 @@ __libc_global_ctors (void) { /* Call constructor functions. */ run_hooks (__CTOR_LIST__); +#ifdef HAVE_DWARF2_UNWIND_INFO + __register_frame (__EH_FRAME_BEGIN__); +#endif } @@ -35,4 +45,7 @@ _fini (void) { /* Call destructor functions. */ run_hooks (__DTOR_LIST__); +#ifdef HAVE_DWARF2_UNWIND_INFO + __deregister_frame (__EH_FRAME_BEGIN__); +#endif } |