diff options
Diffstat (limited to 'tools/jprof/bfd.cpp')
| -rw-r--r-- | tools/jprof/bfd.cpp | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/tools/jprof/bfd.cpp b/tools/jprof/bfd.cpp deleted file mode 100644 index 2e013d0ae..000000000 --- a/tools/jprof/bfd.cpp +++ /dev/null @@ -1,231 +0,0 @@ -// vim:ts=8:sw=2:et: -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -#include "leaky.h" - -#ifdef USE_BFD -#include <stdio.h> -#include <string.h> -#include <fcntl.h> -#include <unistd.h> -#include <libgen.h> -#include <bfd.h> -#include <cxxabi.h> - -static bfd *try_debug_file(const char *filename, unsigned long crc32) -{ - int fd = open(filename, O_RDONLY); - if (fd < 0) - return nullptr; - - unsigned char buf[4*1024]; - unsigned long crc = 0; - - while (1) { - ssize_t count = read(fd, buf, sizeof(buf)); - if (count <= 0) - break; - - crc = bfd_calc_gnu_debuglink_crc32(crc, buf, count); - } - - close(fd); - - if (crc != crc32) - return nullptr; - - bfd *object = bfd_openr(filename, nullptr); - if (!bfd_check_format(object, bfd_object)) { - bfd_close(object); - return nullptr; - } - - return object; -} - -static bfd *find_debug_file(bfd *lib, const char *aFileName) -{ - // check for a separate debug file with symbols - asection *sect = bfd_get_section_by_name(lib, ".gnu_debuglink"); - - if (!sect) - return nullptr; - - bfd_size_type debuglinkSize = bfd_section_size (objfile->obfd, sect); - - char *debuglink = new char[debuglinkSize]; - bfd_get_section_contents(lib, sect, debuglink, 0, debuglinkSize); - - // crc checksum is aligned to 4 bytes, and after the NUL. - int crc_offset = (int(strlen(debuglink)) & ~3) + 4; - unsigned long crc32 = bfd_get_32(lib, debuglink + crc_offset); - - // directory component - char *dirbuf = strdup(aFileName); - const char *dir = dirname(dirbuf); - - static const char debug_subdir[] = ".debug"; - // This is gdb's default global debugging info directory, but gdb can - // be instructed to use a different directory. - static const char global_debug_dir[] = "/usr/lib/debug"; - - char *filename = - new char[strlen(global_debug_dir) + strlen(dir) + crc_offset + 3]; - - // /path/debuglink - sprintf(filename, "%s/%s", dir, debuglink); - bfd *debugFile = try_debug_file(filename, crc32); - if (!debugFile) { - - // /path/.debug/debuglink - sprintf(filename, "%s/%s/%s", dir, debug_subdir, debuglink); - debugFile = try_debug_file(filename, crc32); - if (!debugFile) { - - // /usr/lib/debug/path/debuglink - sprintf(filename, "%s/%s/%s", global_debug_dir, dir, debuglink); - debugFile = try_debug_file(filename, crc32); - } - } - - delete[] filename; - free(dirbuf); - delete[] debuglink; - - return debugFile; -} - - -// Use an indirect array to avoid copying tons of objects -Symbol ** leaky::ExtendSymbols(int num) -{ - long n = numExternalSymbols + num; - - externalSymbols = (Symbol**) - realloc(externalSymbols, - (size_t) (sizeof(externalSymbols[0]) * n)); - Symbol *new_array = new Symbol[n]; - for (int i = 0; i < num; i++) { - externalSymbols[i + numExternalSymbols] = &new_array[i]; - } - lastSymbol = externalSymbols + n; - Symbol **sp = externalSymbols + numExternalSymbols; - numExternalSymbols = n; - return sp; -} - -#define NEXT_SYMBOL do { sp++; \ - if (sp >= lastSymbol) { \ - sp = ExtendSymbols(16384); \ - } \ - } while (0) - -void leaky::ReadSymbols(const char *aFileName, u_long aBaseAddress) -{ - int initialSymbols = usefulSymbols; - if (nullptr == externalSymbols) { - externalSymbols = (Symbol**) calloc(sizeof(Symbol*),10000); - Symbol *new_array = new Symbol[10000]; - for (int i = 0; i < 10000; i++) { - externalSymbols[i] = &new_array[i]; - } - numExternalSymbols = 10000; - } - Symbol** sp = externalSymbols + usefulSymbols; - lastSymbol = externalSymbols + numExternalSymbols; - - // Create a dummy symbol for the library so, if it doesn't have any - // symbols, we show it by library. - (*sp)->Init(aFileName, aBaseAddress); - NEXT_SYMBOL; - - bfd_boolean kDynamic = (bfd_boolean) false; - - static int firstTime = 1; - if (firstTime) { - firstTime = 0; - bfd_init (); - } - - bfd* lib = bfd_openr(aFileName, nullptr); - if (nullptr == lib) { - return; - } - if (!bfd_check_format(lib, bfd_object)) { - bfd_close(lib); - return; - } - - bfd *symbolFile = find_debug_file(lib, aFileName); - - // read mini symbols - PTR minisyms; - unsigned int size; - long symcount = 0; - - if (symbolFile) { - symcount = bfd_read_minisymbols(symbolFile, kDynamic, &minisyms, &size); - if (symcount == 0) { - bfd_close(symbolFile); - } else { - bfd_close(lib); - } - } - if (symcount == 0) { - symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size); - if (symcount == 0) { - // symtab is empty; try dynamic symbols - kDynamic = (bfd_boolean) true; - symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size); - } - symbolFile = lib; - } - - asymbol* store; - store = bfd_make_empty_symbol(symbolFile); - - // Scan symbols - size_t demangle_buffer_size = 128; - char *demangle_buffer = (char*) malloc(demangle_buffer_size); - bfd_byte* from = (bfd_byte *) minisyms; - bfd_byte* fromend = from + symcount * size; - for (; from < fromend; from += size) { - asymbol *sym; - sym = bfd_minisymbol_to_symbol(symbolFile, kDynamic, (const PTR) from, store); - - symbol_info syminfo; - bfd_get_symbol_info (symbolFile, sym, &syminfo); - -// if ((syminfo.type == 'T') || (syminfo.type == 't')) { - const char* nm = bfd_asymbol_name(sym); - if (nm && nm[0]) { - char* dnm = nullptr; - if (strncmp("__thunk", nm, 7)) { - dnm = - abi::__cxa_demangle(nm, demangle_buffer, &demangle_buffer_size, 0); - if (dnm) { - demangle_buffer = dnm; - } - } - (*sp)->Init(dnm ? dnm : nm, syminfo.value + aBaseAddress); - NEXT_SYMBOL; - } -// } - } - - free(demangle_buffer); - demangle_buffer = nullptr; - - bfd_close(symbolFile); - - int interesting = sp - externalSymbols; - if (!quiet) { - printf("%s provided %d symbols\n", aFileName, - interesting - initialSymbols); - } - usefulSymbols = interesting; -} - -#endif /* USE_BFD */ |