Mercurial > hg > graal-compiler
diff agent/src/os/bsd/libproc_impl.c @ 8750:39432a1cefdd
8003348: SA can not read core file on OS
Summary: Macosx uses Mach-O file format for binary files, not ELF format. Currently SA works on core files on other platforms, t his change enables SA work on core file generated on Darwin.
Reviewed-by: sla, sspitsyn
Contributed-by: yumin.qi@oracle.com
author | minqi |
---|---|
date | Thu, 14 Mar 2013 00:33:08 -0700 |
parents | 2394a89e89f4 |
children |
line wrap: on
line diff
--- a/agent/src/os/bsd/libproc_impl.c Wed Mar 13 17:34:29 2013 -0400 +++ b/agent/src/os/bsd/libproc_impl.c Thu Mar 14 00:33:08 2013 -0700 @@ -21,12 +21,6 @@ * questions. * */ -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <thread_db.h> #include "libproc_impl.h" static const char* alt_root = NULL; @@ -34,61 +28,65 @@ #define SA_ALTROOT "SA_ALTROOT" +off_t ltell(int fd) { + return lseek(fd, 0, SEEK_CUR); +} + static void init_alt_root() { - if (alt_root_len == -1) { - alt_root = getenv(SA_ALTROOT); - if (alt_root) { - alt_root_len = strlen(alt_root); - } else { - alt_root_len = 0; - } - } + if (alt_root_len == -1) { + alt_root = getenv(SA_ALTROOT); + if (alt_root) { + alt_root_len = strlen(alt_root); + } else { + alt_root_len = 0; + } + } } int pathmap_open(const char* name) { - int fd; - char alt_path[PATH_MAX + 1]; + int fd; + char alt_path[PATH_MAX + 1]; + + init_alt_root(); - init_alt_root(); - fd = open(name, O_RDONLY); - if (fd >= 0) { + if (alt_root_len > 0) { + strcpy(alt_path, alt_root); + strcat(alt_path, name); + fd = open(alt_path, O_RDONLY); + if (fd >= 0) { + print_debug("path %s substituted for %s\n", alt_path, name); return fd; - } + } - if (alt_root_len > 0) { + if (strrchr(name, '/')) { strcpy(alt_path, alt_root); - strcat(alt_path, name); + strcat(alt_path, strrchr(name, '/')); fd = open(alt_path, O_RDONLY); if (fd >= 0) { - print_debug("path %s substituted for %s\n", alt_path, name); - return fd; + print_debug("path %s substituted for %s\n", alt_path, name); + return fd; } - - if (strrchr(name, '/')) { - strcpy(alt_path, alt_root); - strcat(alt_path, strrchr(name, '/')); - fd = open(alt_path, O_RDONLY); - if (fd >= 0) { - print_debug("path %s substituted for %s\n", alt_path, name); - return fd; - } - } - } - - return -1; + } + } else { + fd = open(name, O_RDONLY); + if (fd >= 0) { + return fd; + } + } + return -1; } static bool _libsaproc_debug; void print_debug(const char* format,...) { - if (_libsaproc_debug) { - va_list alist; + if (_libsaproc_debug) { + va_list alist; - va_start(alist, format); - fputs("libsaproc DEBUG: ", stderr); - vfprintf(stderr, format, alist); - va_end(alist); - } + va_start(alist, format); + fputs("libsaproc DEBUG: ", stderr); + vfprintf(stderr, format, alist); + va_end(alist); + } } void print_error(const char* format,...) { @@ -100,172 +98,235 @@ } bool is_debug() { - return _libsaproc_debug; + return _libsaproc_debug; } +#ifdef __APPLE__ +// get arch offset in file +bool get_arch_off(int fd, cpu_type_t cputype, off_t *offset) { + struct fat_header fatheader; + struct fat_arch fatarch; + off_t img_start = 0; + + off_t pos = ltell(fd); + if (read(fd, (void *)&fatheader, sizeof(struct fat_header)) != sizeof(struct fat_header)) { + return false; + } + if (fatheader.magic == FAT_CIGAM) { + int i; + for (i = 0; i < ntohl(fatheader.nfat_arch); i++) { + if (read(fd, (void *)&fatarch, sizeof(struct fat_arch)) != sizeof(struct fat_arch)) { + return false; + } + if (ntohl(fatarch.cputype) == cputype) { + print_debug("fat offset=%x\n", ntohl(fatarch.offset)); + img_start = ntohl(fatarch.offset); + break; + } + } + if (img_start == 0) { + return false; + } + } + lseek(fd, pos, SEEK_SET); + *offset = img_start; + return true; +} + +bool is_macho_file(int fd) { + mach_header_64 fhdr; + off_t x86_64_off; + + if (fd < 0) { + print_debug("Invalid file handle passed to is_macho_file\n"); + return false; + } + + off_t pos = ltell(fd); + // check fat header + if (!get_arch_off(fd, CPU_TYPE_X86_64, &x86_64_off)) { + print_debug("failed to get fat header\n"); + return false; + } + lseek(fd, x86_64_off, SEEK_SET); + if (read(fd, (void *)&fhdr, sizeof(mach_header_64)) != sizeof(mach_header_64)) { + return false; + } + lseek(fd, pos, SEEK_SET); // restore + print_debug("fhdr.magic %x\n", fhdr.magic); + return (fhdr.magic == MH_MAGIC_64 || fhdr.magic == MH_CIGAM_64); +} + +#endif //__APPLE__ + // initialize libproc bool init_libproc(bool debug) { - // init debug mode _libsaproc_debug = debug; - +#ifndef __APPLE__ // initialize the thread_db library if (td_init() != TD_OK) { print_debug("libthread_db's td_init failed\n"); return false; } - +#endif // __APPLE__ return true; } -static void destroy_lib_info(struct ps_prochandle* ph) { - lib_info* lib = ph->libs; - while (lib) { - lib_info *next = lib->next; - if (lib->symtab) { - destroy_symtab(lib->symtab); - } - free(lib); - lib = next; - } +void destroy_lib_info(struct ps_prochandle* ph) { + lib_info* lib = ph->libs; + while (lib) { + lib_info* next = lib->next; + if (lib->symtab) { + destroy_symtab(lib->symtab); + } + free(lib); + lib = next; + } } -static void destroy_thread_info(struct ps_prochandle* ph) { - thread_info* thr = ph->threads; - while (thr) { - thread_info *next = thr->next; - free(thr); - thr = next; - } +void destroy_thread_info(struct ps_prochandle* ph) { + sa_thread_info* thr = ph->threads; + while (thr) { + sa_thread_info* n = thr->next; + free(thr); + thr = n; + } } // ps_prochandle cleanup - -// ps_prochandle cleanup void Prelease(struct ps_prochandle* ph) { - // do the "derived class" clean-up first - ph->ops->release(ph); - destroy_lib_info(ph); - destroy_thread_info(ph); - free(ph); + // do the "derived class" clean-up first + ph->ops->release(ph); + destroy_lib_info(ph); + destroy_thread_info(ph); + free(ph); } lib_info* add_lib_info(struct ps_prochandle* ph, const char* libname, uintptr_t base) { - return add_lib_info_fd(ph, libname, -1, base); + return add_lib_info_fd(ph, libname, -1, base); } lib_info* add_lib_info_fd(struct ps_prochandle* ph, const char* libname, int fd, uintptr_t base) { lib_info* newlib; + print_debug("add_lib_info_fd %s\n", libname); - if ( (newlib = (lib_info*) calloc(1, sizeof(struct lib_info))) == NULL) { - print_debug("can't allocate memory for lib_info\n"); - return NULL; - } - - strncpy(newlib->name, libname, sizeof(newlib->name)); - newlib->base = base; + if ( (newlib = (lib_info*) calloc(1, sizeof(struct lib_info))) == NULL) { + print_debug("can't allocate memory for lib_info\n"); + return NULL; + } - if (fd == -1) { - if ( (newlib->fd = pathmap_open(newlib->name)) < 0) { - print_debug("can't open shared object %s\n", newlib->name); - free(newlib); - return NULL; - } - } else { - newlib->fd = fd; - } + strncpy(newlib->name, libname, sizeof(newlib->name)); + newlib->base = base; - // check whether we have got an ELF file. /proc/<pid>/map - // gives out all file mappings and not just shared objects - if (is_elf_file(newlib->fd) == false) { - close(newlib->fd); + if (fd == -1) { + if ( (newlib->fd = pathmap_open(newlib->name)) < 0) { + print_debug("can't open shared object %s\n", newlib->name); free(newlib); return NULL; - } - - newlib->symtab = build_symtab(newlib->fd); - if (newlib->symtab == NULL) { - print_debug("symbol table build failed for %s\n", newlib->name); - } - else { - print_debug("built symbol table for %s\n", newlib->name); - } + } + } else { + newlib->fd = fd; + } - // even if symbol table building fails, we add the lib_info. - // This is because we may need to read from the ELF file for core file - // address read functionality. lookup_symbol checks for NULL symtab. - if (ph->libs) { - ph->lib_tail->next = newlib; - ph->lib_tail = newlib; - } else { - ph->libs = ph->lib_tail = newlib; - } - ph->num_libs++; +#ifdef __APPLE__ + // check whether we have got an Macho file. + if (is_macho_file(newlib->fd) == false) { + close(newlib->fd); + free(newlib); + print_debug("not a mach-o file\n"); + return NULL; + } +#else + // check whether we have got an ELF file. /proc/<pid>/map + // gives out all file mappings and not just shared objects + if (is_elf_file(newlib->fd) == false) { + close(newlib->fd); + free(newlib); + return NULL; + } +#endif // __APPLE__ - return newlib; + newlib->symtab = build_symtab(newlib->fd); + if (newlib->symtab == NULL) { + print_debug("symbol table build failed for %s\n", newlib->name); + } else { + print_debug("built symbol table for %s\n", newlib->name); + } + + // even if symbol table building fails, we add the lib_info. + // This is because we may need to read from the ELF file or MachO file for core file + // address read functionality. lookup_symbol checks for NULL symtab. + if (ph->libs) { + ph->lib_tail->next = newlib; + ph->lib_tail = newlib; + } else { + ph->libs = ph->lib_tail = newlib; + } + ph->num_libs++; + return newlib; } // lookup for a specific symbol uintptr_t lookup_symbol(struct ps_prochandle* ph, const char* object_name, const char* sym_name) { - // ignore object_name. search in all libraries - // FIXME: what should we do with object_name?? The library names are obtained - // by parsing /proc/<pid>/maps, which may not be the same as object_name. - // What we need is a utility to map object_name to real file name, something - // dlopen() does by looking at LD_LIBRARY_PATH and /etc/ld.so.cache. For - // now, we just ignore object_name and do a global search for the symbol. + // ignore object_name. search in all libraries + // FIXME: what should we do with object_name?? The library names are obtained + // by parsing /proc/<pid>/maps, which may not be the same as object_name. + // What we need is a utility to map object_name to real file name, something + // dlopen() does by looking at LD_LIBRARY_PATH and /etc/ld.so.cache. For + // now, we just ignore object_name and do a global search for the symbol. - lib_info* lib = ph->libs; - while (lib) { - if (lib->symtab) { - uintptr_t res = search_symbol(lib->symtab, lib->base, sym_name, NULL); - if (res) return res; - } - lib = lib->next; - } + lib_info* lib = ph->libs; + while (lib) { + if (lib->symtab) { + uintptr_t res = search_symbol(lib->symtab, lib->base, sym_name, NULL); + if (res) return res; + } + lib = lib->next; + } - print_debug("lookup failed for symbol '%s' in obj '%s'\n", + print_debug("lookup failed for symbol '%s' in obj '%s'\n", sym_name, object_name); - return (uintptr_t) NULL; + return (uintptr_t) NULL; } - const char* symbol_for_pc(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* poffset) { - const char* res = NULL; - lib_info* lib = ph->libs; - while (lib) { - if (lib->symtab && addr >= lib->base) { - res = nearest_symbol(lib->symtab, addr - lib->base, poffset); - if (res) return res; - } - lib = lib->next; - } - return NULL; + const char* res = NULL; + lib_info* lib = ph->libs; + while (lib) { + if (lib->symtab && addr >= lib->base) { + res = nearest_symbol(lib->symtab, addr - lib->base, poffset); + if (res) return res; + } + lib = lib->next; + } + return NULL; } // add a thread to ps_prochandle -thread_info* add_thread_info(struct ps_prochandle* ph, pthread_t pthread_id, lwpid_t lwp_id) { - thread_info* newthr; - if ( (newthr = (thread_info*) calloc(1, sizeof(thread_info))) == NULL) { - print_debug("can't allocate memory for thread_info\n"); - return NULL; - } +sa_thread_info* add_thread_info(struct ps_prochandle* ph, pthread_t pthread_id, lwpid_t lwp_id) { + sa_thread_info* newthr; + if ( (newthr = (sa_thread_info*) calloc(1, sizeof(sa_thread_info))) == NULL) { + print_debug("can't allocate memory for thread_info\n"); + return NULL; + } - // initialize thread info - newthr->pthread_id = pthread_id; - newthr->lwp_id = lwp_id; + // initialize thread info + newthr->pthread_id = pthread_id; + newthr->lwp_id = lwp_id; - // add new thread to the list - newthr->next = ph->threads; - ph->threads = newthr; - ph->num_threads++; - return newthr; + // add new thread to the list + newthr->next = ph->threads; + ph->threads = newthr; + ph->num_threads++; + return newthr; } - +#ifndef __APPLE__ // struct used for client data from thread_db callback struct thread_db_client_data { - struct ps_prochandle* ph; - thread_info_callback callback; + struct ps_prochandle* ph; + thread_info_callback callback; }; // callback function for libthread_db @@ -314,6 +375,7 @@ return true; } +#endif // __APPLE__ // get number of threads int get_num_threads(struct ps_prochandle* ph) { @@ -322,18 +384,54 @@ // get lwp_id of n'th thread lwpid_t get_lwp_id(struct ps_prochandle* ph, int index) { - int count = 0; - thread_info* thr = ph->threads; - while (thr) { - if (count == index) { - return thr->lwp_id; - } - count++; - thr = thr->next; - } - return -1; + int count = 0; + sa_thread_info* thr = ph->threads; + while (thr) { + if (count == index) { + return thr->lwp_id; + } + count++; + thr = thr->next; + } + return 0; } +#ifdef __APPLE__ +// set lwp_id of n'th thread +bool set_lwp_id(struct ps_prochandle* ph, int index, lwpid_t lwpid) { + int count = 0; + sa_thread_info* thr = ph->threads; + while (thr) { + if (count == index) { + thr->lwp_id = lwpid; + return true; + } + count++; + thr = thr->next; + } + return false; +} + +// get regs of n-th thread, only used in fillThreads the first time called +bool get_nth_lwp_regs(struct ps_prochandle* ph, int index, struct reg* regs) { + int count = 0; + sa_thread_info* thr = ph->threads; + while (thr) { + if (count == index) { + break; + } + count++; + thr = thr->next; + } + if (thr != NULL) { + memcpy(regs, &thr->regs, sizeof(struct reg)); + return true; + } + return false; +} + +#endif // __APPLE__ + // get regs for a given lwp bool get_lwp_regs(struct ps_prochandle* ph, lwpid_t lwp_id, struct reg* regs) { return ph->ops->get_lwp_regs(ph, lwp_id, regs); @@ -341,35 +439,35 @@ // get number of shared objects int get_num_libs(struct ps_prochandle* ph) { - return ph->num_libs; + return ph->num_libs; } // get name of n'th solib const char* get_lib_name(struct ps_prochandle* ph, int index) { - int count = 0; - lib_info* lib = ph->libs; - while (lib) { - if (count == index) { - return lib->name; - } - count++; - lib = lib->next; - } - return NULL; + int count = 0; + lib_info* lib = ph->libs; + while (lib) { + if (count == index) { + return lib->name; + } + count++; + lib = lib->next; + } + return NULL; } // get base address of a lib uintptr_t get_lib_base(struct ps_prochandle* ph, int index) { - int count = 0; - lib_info* lib = ph->libs; - while (lib) { - if (count == index) { - return lib->base; - } - count++; - lib = lib->next; - } - return (uintptr_t)NULL; + int count = 0; + lib_info* lib = ph->libs; + while (lib) { + if (count == index) { + return lib->base; + } + count++; + lib = lib->next; + } + return (uintptr_t)NULL; } bool find_lib(struct ps_prochandle* ph, const char *lib_name) { @@ -425,6 +523,7 @@ va_end(alist); } +#ifndef __APPLE__ // ------------------------------------------------------------------------ // Functions below this point are not yet implemented. They are here only // to make the linker happy. @@ -458,3 +557,4 @@ print_debug("ps_pcontinue not implemented\n"); return PS_OK; } +#endif // __APPLE__