Support compressed debug_info
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65012 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse
parent
136d24ea1b
commit
628e85c7b3
342
addr2line.c
342
addr2line.c
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@ -125,14 +125,32 @@ typedef struct line_info {
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struct line_info *next;
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} line_info_t;
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typedef struct obj_info obj_info_t;
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struct obj_info {
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struct dwarf_section {
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ElfW(Shdr) *shdr;
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char *ptr;
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size_t size;
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};
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typedef struct obj_info {
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const char *path; /* object path */
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void *mapped;
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char *mapped;
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size_t mapped_size;
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void *uncompressed_debug_line;
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void *uncompressed;
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uintptr_t base_addr;
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obj_info_t *next;
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struct dwarf_section debug_abbrev;
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struct dwarf_section debug_info;
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struct dwarf_section debug_line;
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struct dwarf_section debug_ranges;
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struct dwarf_section debug_str;
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struct obj_info *next;
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} obj_info_t;
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#define obj_dwarf_section_at(obj,n) (&obj->debug_abbrev + n)
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#define DWARF_SECTION_COUNT 5
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struct debug_section_definition {
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const char *name;
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struct dwarf_section *dwarf;
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};
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/* Avoid consuming stack as this module may be used from signal handler */
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@ -486,63 +504,6 @@ follow_debuglink(const char *debuglink, int num_traces, void **traces,
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fill_lines(num_traces, traces, 0, objp, lines, offset);
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}
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#ifdef SUPPORT_COMPRESSED_DEBUG_LINE
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static int
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parse_compressed_debug_line(int num_traces, void **traces,
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char *debug_line, unsigned long size,
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obj_info_t *obj, line_info_t *lines, int offset)
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{
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void *uncompressed_debug_line;
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ElfW(Chdr) *chdr = (ElfW(Chdr) *)debug_line;
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unsigned long destsize = chdr->ch_size;
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int ret = 0;
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if (chdr->ch_type != ELFCOMPRESS_ZLIB) {
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/* unsupported compression type */
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return -1;
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}
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uncompressed_debug_line = malloc(destsize);
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if (!uncompressed_debug_line) return -1;
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ret = uncompress(uncompressed_debug_line, &destsize,
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(const Bytef *)debug_line + sizeof(ElfW(Chdr)), size-sizeof(ElfW(Chdr)));
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if (ret != Z_OK) goto fail;
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ret = parse_debug_line(num_traces, traces,
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uncompressed_debug_line,
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destsize,
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obj, lines, offset);
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if (ret) goto fail;
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obj->uncompressed_debug_line = uncompressed_debug_line;
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return 0;
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fail:
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free(uncompressed_debug_line);
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return -1;
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}
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#endif
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void hexdump0(const unsigned char *p, size_t n) {
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size_t i;
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fprintf(stderr, " 0 1 2 3 4 5 6 7 8 9 A B C D E F\n");
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for (i=0; i < n; i++){
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switch (i & 15) {
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case 0:
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fprintf(stderr, "%02zd: %02X ", i/16, p[i]);
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break;
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case 15:
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fprintf(stderr, "%02X\n", p[i]);
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break;
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default:
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fprintf(stderr, "%02X ", p[i]);
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break;
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}
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}
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if ((i & 15) != 15) {
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fprintf(stderr, "\n");
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}
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}
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#define hexdump(p,n) hexdump0((const unsigned char *)p, n)
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enum
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{
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DW_TAG_inlined_subroutine = 0x1d,
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@ -769,22 +730,12 @@ typedef struct {
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} __attribute__((packed)) DW_CompilationUnitHeader64;
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typedef struct {
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ElfW(Shdr) *abbrev;
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ElfW(Shdr) *info;
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ElfW(Shdr) *ranges;
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ElfW(Shdr) *str;
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ElfW(Shdr) *line;
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} dwarf_args;
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typedef struct {
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dwarf_args *dwarf;
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obj_info_t *obj;
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char *file;
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char *current_cu;
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char *debug_line_cu_end;
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char *debug_line_files;
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char *debug_line_directories;
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char *p0;
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char *p;
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char *pend;
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char *q0;
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@ -795,6 +746,7 @@ typedef struct {
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} DebugInfoReader;
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typedef struct {
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ptrdiff_t pos;
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int tag;
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int has_children;
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} DIE;
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@ -805,6 +757,7 @@ typedef struct {
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uint64_t uint64;
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int64_t int64;
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} as;
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uint64_t off;
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uint64_t at;
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uint64_t form;
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size_t size;
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@ -891,14 +844,13 @@ read_sleb128(DebugInfoReader *reader)
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}
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static void
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debug_info_reader_init(DebugInfoReader *reader, obj_info_t *obj, dwarf_args *dwarf)
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debug_info_reader_init(DebugInfoReader *reader, obj_info_t *obj)
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{
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reader->file = obj->mapped;
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reader->obj = obj;
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reader->dwarf = dwarf;
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reader->p0 = reader->p = reader->file + dwarf->info->sh_offset;
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reader->pend = reader->file + dwarf->info->sh_offset + dwarf->info->sh_size;
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reader->debug_line_cu_end = reader->file + dwarf->line->sh_offset;
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reader->p = obj->debug_info.ptr;
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reader->pend = obj->debug_info.ptr + obj->debug_info.size;
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reader->debug_line_cu_end = obj->debug_line.ptr;
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}
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static void
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@ -933,7 +885,7 @@ di_read_debug_line_cu(DebugInfoReader *reader)
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p = memchr(p, '\0', reader->debug_line_cu_end - p);
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if (!p) {
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fprintf(stderr, "Wrongly reached the end of Directory Table at %tx",
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reader->debug_line_directories - (reader->file + reader->dwarf->line->sh_offset));
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reader->debug_line_directories - reader->obj->debug_line.ptr);
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abort();
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}
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p++;
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@ -951,13 +903,13 @@ di_read_cu(DebugInfoReader *reader)
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if (hdr32->unit_length == 0xffffffff) {
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DW_CompilationUnitHeader64 *hdr = (DW_CompilationUnitHeader64 *)hdr32;
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reader->p += 23;
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reader->q0 = reader->file + reader->dwarf->abbrev->sh_offset + hdr->debug_abbrev_offset;
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reader->q0 = reader->obj->debug_abbrev.ptr + hdr->debug_abbrev_offset;
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reader->address_size = hdr->address_size;
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reader->format = 64;
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} else {
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DW_CompilationUnitHeader32 *hdr = hdr32;
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reader->p += 11;
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reader->q0 = reader->file + reader->dwarf->abbrev->sh_offset + hdr->debug_abbrev_offset;
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reader->q0 = reader->obj->debug_abbrev.ptr + hdr->debug_abbrev_offset;
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reader->address_size = hdr->address_size;
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reader->format = 32;
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}
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@ -983,6 +935,15 @@ static void
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set_cstr_value(DebugInfoValue *v, char *s)
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{
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v->as.ptr = s;
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v->off = 0;
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v->type = VAL_cstr;
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}
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static void
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set_cstrp_value(DebugInfoValue *v, char *s, uint64_t off)
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{
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v->as.ptr = s;
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v->off = off;
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v->type = VAL_cstr;
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}
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@ -993,6 +954,16 @@ set_data_value(DebugInfoValue *v, char *s)
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v->type = VAL_data;
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}
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static const char *
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get_cstr_value(DebugInfoValue *v)
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{
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if (v->as.ptr) {
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return v->as.ptr + v->off;
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} else {
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return NULL;
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}
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}
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static void
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debug_info_reader_read_value(DebugInfoReader *reader, uint64_t form, DebugInfoValue *v)
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{
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@ -1051,7 +1022,7 @@ debug_info_reader_read_value(DebugInfoReader *reader, uint64_t form, DebugInfoVa
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set_int_value(v, read_sleb128(reader));
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break;
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case DW_FORM_strp:
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set_cstr_value(v, reader->file + reader->dwarf->str->sh_offset + read_uint(reader));
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set_cstrp_value(v, reader->obj->debug_str.ptr, read_uint(reader));
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break;
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case DW_FORM_udata:
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set_uint_value(v, read_uleb128(reader));
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@ -1227,6 +1198,7 @@ di_read_die(DebugInfoReader *reader, DIE *die) {
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reader->q = find_abbrev(reader->q0, abbrev_number);
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die->pos = reader->p - reader->obj->debug_info.ptr - 1;
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die->tag = uleb128(&reader->q); /* tag */
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die->has_children = *reader->q++; /* has_children */
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if (die->has_children) {
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@ -1258,8 +1230,7 @@ di_skip_records(DebugInfoReader *reader) {
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}
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typedef struct {
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char *file;
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uintptr_t debug_ranges_offset;
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char *debug_ranges;
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uint64_t low_pc;
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uint64_t high_pc;
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uint64_t ranges;
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@ -1286,8 +1257,8 @@ ranges_set_ranges(ranges_t *ptr, uint64_t ranges) {
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ptr->ranges_set = true;
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}
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static int
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ranges_include(ranges_t *ptr, uint64_t addr) {
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static bool
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ranges_include(DebugInfoReader *reader, ranges_t *ptr, uint64_t addr) {
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if (ptr->high_pc_set) {
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if (ptr->ranges_set || !ptr->low_pc_set) {
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exit(1);
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@ -1297,7 +1268,7 @@ ranges_include(ranges_t *ptr, uint64_t addr) {
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}
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}
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else if (ptr->ranges_set) {
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char *p = ptr->file + ptr->debug_ranges_offset + ptr->ranges;
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char *p = reader->obj->debug_ranges.ptr + ptr->ranges;
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for (;;) {
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uint64_t from = read_uint64(&p);
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uint64_t to = read_uint64(&p);
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@ -1328,7 +1299,7 @@ ranges_inspect(ranges_t *ptr) {
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else if (ptr->ranges_set) {
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char *p;
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fprintf(stderr,"low_pc:%lx ranges:%lx\n",ptr->low_pc,ptr->ranges);
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p = ptr->file + ptr->debug_ranges_offset + ptr->ranges;
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p = ptr->debug_ranges + ptr->ranges;
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for (;;) {
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uint64_t from = read_uint64(&p);
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uint64_t to = read_uint64(&p);
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@ -1360,7 +1331,7 @@ read_abstract_origin(DebugInfoReader *reader, uint64_t abstract_origin, line_inf
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if (!di_read_record(reader, &v)) break;
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switch (v.at) {
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case DW_AT_name:
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line->sname = v.as.ptr;
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line->sname = get_cstr_value(&v);
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break;
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}
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}
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@ -1376,8 +1347,7 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
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line_info_t *lines, int offset) {
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do {
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DIE die;
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ranges_t ranges = {reader->file, reader->dwarf->ranges->sh_offset};
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//ptrdiff_t diepos = reader->p - reader->p0;
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ranges_t ranges = {0};
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line_info_t line = {0};
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if (!di_read_die(reader, &die)) continue;
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@ -1398,7 +1368,7 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
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//div_inspect(&v);
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switch (v.at) {
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case DW_AT_name:
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line.sname = v.as.ptr;
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line.sname = get_cstr_value(&v);
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break;
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case DW_AT_call_file:
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fill_filename(v.as.uint64, reader->debug_line_directories, reader->debug_line_files, &line);
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@ -1429,9 +1399,9 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
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for (int i=offset; i < num_traces; i++) {
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uintptr_t addr = (uintptr_t)traces[i];
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uintptr_t offset = addr - reader->obj->base_addr;
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if (ranges_include(&ranges, offset)) {
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//fprintf(stderr, "%d:%tx: %lx %x %s: %s/%s %d\n",__LINE__,diepos,addr, die.tag,line.sname,line.dirname,line.filename,line.line);
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if (lines[i].path) {
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if (ranges_include(reader, &ranges, offset)) {
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//fprintf(stderr, "%d:%tx: %lx->%lx %x %s: %s/%s %d %s\n",__LINE__,die.pos, addr,offset, die.tag,line.sname,line.dirname,line.filename,line.line,reader->obj->path);
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if (lines[i].sname) {
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line_info_t *lp = malloc(sizeof(line_info_t));
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memcpy(lp, &lines[i], sizeof(line_info_t));
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lines[i].next = lp;
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@ -1449,14 +1419,54 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
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} while (reader->level > 0);
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}
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static void print_line0(line_info_t *line, void *address);
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static void
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print_line(line_info_t *line, void *address) {
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print_line0(line, address);
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if (line->next) {
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print_line(line->next, NULL);
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static unsigned long
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uncompress_debug_section(ElfW(Shdr) *shdr, char *file, char **ptr)
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{
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#ifdef SUPPORT_COMPRESSED_DEBUG_LINE
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ElfW(Chdr) *chdr = (ElfW(Chdr) *)(file + shdr->sh_offset);
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unsigned long destsize = chdr->ch_size;
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int ret = 0;
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if (chdr->ch_type != ELFCOMPRESS_ZLIB) {
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/* unsupported compression type */
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return 0;
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}
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*ptr = malloc(destsize);
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if (!*ptr) return 0;
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ret = uncompress((Bytef *)*ptr, &destsize,
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(const Bytef*)chdr + sizeof(ElfW(Chdr)),
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shdr->sh_size - sizeof(ElfW(Chdr)));
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if (ret != Z_OK) goto fail;
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return destsize;
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fail:
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free(*ptr);
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#endif
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return 0;
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}
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void hexdump0(const unsigned char *p, size_t n) {
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size_t i;
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fprintf(stderr, " 0 1 2 3 4 5 6 7 8 9 A B C D E F\n");
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for (i=0; i < n; i++){
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switch (i & 15) {
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case 0:
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fprintf(stderr, "%02zd: %02X ", i/16, p[i]);
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break;
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case 15:
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fprintf(stderr, "%02X\n", p[i]);
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break;
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default:
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fprintf(stderr, "%02X ", p[i]);
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break;
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}
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}
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if ((i & 15) != 15) {
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fprintf(stderr, "\n");
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}
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}
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#define hexdump(p,n) hexdump0((const unsigned char *)p, n)
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/* read file and fill lines */
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static uintptr_t
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@ -1468,8 +1478,7 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
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char *section_name;
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ElfW(Ehdr) *ehdr;
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ElfW(Shdr) *shdr, *shstr_shdr;
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ElfW(Shdr) *debug_line_shdr = NULL, *gnu_debuglink_shdr = NULL;
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dwarf_args dwarf = {0};
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ElfW(Shdr) *gnu_debuglink_shdr = NULL;
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int fd;
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off_t filesize;
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char *file;
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@ -1477,7 +1486,13 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
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ElfW(Shdr) *dynsym_shdr = NULL, *dynstr_shdr = NULL;
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obj_info_t *obj = *objp;
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uintptr_t dladdr_fbase = 0;
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bool compressed_p = false;
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const char *debug_section_names[] = {
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".debug_abbrev",
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".debug_info",
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".debug_line",
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".debug_ranges",
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".debug_str"
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};
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fd = open(binary_filename, O_RDONLY);
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if (fd < 0) {
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@ -1544,28 +1559,18 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
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dynsym_shdr = shdr + i;
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break;
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case SHT_PROGBITS:
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if (!strcmp(section_name, ".debug_line")) {
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if (shdr[i].sh_flags & SHF_COMPRESSED) {
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compressed_p = true;
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}
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debug_line_shdr = shdr + i;
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dwarf.line = shdr + i;
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}
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else if (!strcmp(section_name, ".gnu_debuglink")) {
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if (!strcmp(section_name, ".gnu_debuglink")) {
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gnu_debuglink_shdr = shdr + i;
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}
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else if (!strcmp(section_name, ".debug_abbrev")) {
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dwarf.abbrev = shdr + i;
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else {
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int j;
|
||||
for (j=0; j < DWARF_SECTION_COUNT; j++) {
|
||||
if (strcmp(section_name, debug_section_names[j]) == 0) {
|
||||
obj_dwarf_section_at(obj, j)->shdr = &shdr[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (!strcmp(section_name, ".debug_info")) {
|
||||
dwarf.info = shdr + i;
|
||||
}
|
||||
else if (!strcmp(section_name, ".debug_ranges")) {
|
||||
dwarf.ranges = shdr + i;
|
||||
}
|
||||
else if (!strcmp(section_name, ".debug_str")) {
|
||||
dwarf.str = shdr + i;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
@ -1583,7 +1588,7 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
|
|||
ElfW(Sym) *sym = &symtab[j];
|
||||
Dl_info info;
|
||||
void *s;
|
||||
if (ELF_ST_TYPE(sym->st_info) != STT_FUNC) continue;
|
||||
if (ELF_ST_TYPE(sym->st_info) != STT_FUNC || sym->st_size == 0) continue;
|
||||
s = dlsym(handle, strtab + sym->st_name);
|
||||
if (s && dladdr(s, &info)) {
|
||||
dladdr_fbase = (uintptr_t)info.dli_fbase;
|
||||
|
|
@ -1602,21 +1607,56 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
|
|||
}
|
||||
}
|
||||
|
||||
if (dwarf.str && dwarf.info && dwarf.line && dwarf.abbrev && dwarf.ranges) {
|
||||
if (obj->debug_info.shdr) {
|
||||
size_t j;
|
||||
for (j=0; j < DWARF_SECTION_COUNT; j++) {
|
||||
struct dwarf_section *s = obj_dwarf_section_at(obj, j);
|
||||
ElfW(Shdr) *shdr = s->shdr;
|
||||
if (!shdr) break;
|
||||
s->ptr = file + shdr->sh_offset;
|
||||
s->size = shdr->sh_size;
|
||||
if (shdr->sh_flags & SHF_COMPRESSED) {
|
||||
s->size = uncompress_debug_section(shdr, file, &s->ptr);
|
||||
if (!s->size) goto fail;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!obj->debug_line.shdr) {
|
||||
/* This file doesn't have .debug_line section,
|
||||
let's check .gnu_debuglink section instead. */
|
||||
if (gnu_debuglink_shdr && check_debuglink) {
|
||||
follow_debuglink(file + gnu_debuglink_shdr->sh_offset,
|
||||
num_traces, traces,
|
||||
objp, lines, offset);
|
||||
}
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (obj->debug_info.ptr && obj->debug_abbrev.ptr) {
|
||||
DebugInfoReader reader;
|
||||
debug_info_reader_init(&reader, obj, &dwarf);
|
||||
debug_info_reader_init(&reader, obj);
|
||||
i = 0;
|
||||
while (reader.p < reader.pend) {
|
||||
//fprintf(stderr, "%d:%tx: CU[%d]\n", __LINE__, di_pos(&reader), i++);
|
||||
//fprintf(stderr, "%d:%tx: CU[%d]\n", __LINE__, reader.p - reader.obj->debug_info, i++);
|
||||
di_read_cu(&reader);
|
||||
debug_info_read(&reader, num_traces, traces, lines, offset);
|
||||
}
|
||||
}
|
||||
|
||||
if (parse_debug_line(num_traces, traces,
|
||||
obj->debug_line.ptr,
|
||||
obj->debug_line.size,
|
||||
obj, lines, offset) == -1)
|
||||
goto fail;
|
||||
|
||||
/* This file doesn't have symtab, use dynsym instead */
|
||||
if (!symtab_shdr) {
|
||||
symtab_shdr = dynsym_shdr;
|
||||
strtab_shdr = dynstr_shdr;
|
||||
}
|
||||
|
||||
/* This file doesn't have dwarf, use symtab */
|
||||
if (symtab_shdr && strtab_shdr) {
|
||||
char *strtab = file + strtab_shdr->sh_offset;
|
||||
ElfW(Sym) *symtab = (ElfW(Sym) *)(file + symtab_shdr->sh_offset);
|
||||
|
|
@ -1638,33 +1678,6 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
|
|||
}
|
||||
}
|
||||
|
||||
if (!debug_line_shdr) {
|
||||
/* This file doesn't have .debug_line section,
|
||||
let's check .gnu_debuglink section instead. */
|
||||
if (gnu_debuglink_shdr && check_debuglink) {
|
||||
follow_debuglink(file + gnu_debuglink_shdr->sh_offset,
|
||||
num_traces, traces,
|
||||
objp, lines, offset);
|
||||
}
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (compressed_p) {
|
||||
#ifdef SUPPORT_COMPRESSED_DEBUG_LINE
|
||||
int r = parse_compressed_debug_line(num_traces, traces,
|
||||
file + debug_line_shdr->sh_offset,
|
||||
debug_line_shdr->sh_size,
|
||||
obj, lines, offset);
|
||||
if (r) goto fail;
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
int r = parse_debug_line(num_traces, traces,
|
||||
file + debug_line_shdr->sh_offset,
|
||||
debug_line_shdr->sh_size,
|
||||
obj, lines, offset);
|
||||
if (r) goto fail;
|
||||
}
|
||||
finish:
|
||||
return dladdr_fbase;
|
||||
fail:
|
||||
|
|
@ -1745,6 +1758,14 @@ print_line0(line_info_t *line, void *address) {
|
|||
}
|
||||
}
|
||||
|
||||
static void
|
||||
print_line(line_info_t *line, void *address) {
|
||||
print_line0(line, address);
|
||||
if (line->next) {
|
||||
print_line(line->next, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
rb_dump_backtrace_with_lines(int num_traces, void **traces)
|
||||
{
|
||||
|
|
@ -1816,13 +1837,16 @@ next_line:
|
|||
/* free */
|
||||
while (obj) {
|
||||
obj_info_t *o = obj;
|
||||
obj = o->next;
|
||||
if (o->mapped_size) {
|
||||
munmap(o->mapped, o->mapped_size);
|
||||
}
|
||||
if (o->uncompressed_debug_line) {
|
||||
free(o->uncompressed_debug_line);
|
||||
for (i=0; i < DWARF_SECTION_COUNT; i++) {
|
||||
struct dwarf_section *s = obj_dwarf_section_at(obj, i);
|
||||
if (s->shdr && (s->shdr->sh_flags & SHF_COMPRESSED)) {
|
||||
free(s->ptr);
|
||||
}
|
||||
}
|
||||
if (obj->mapped_size) {
|
||||
munmap(obj->mapped, obj->mapped_size);
|
||||
}
|
||||
obj = o->next;
|
||||
free(o);
|
||||
}
|
||||
for (i = 0; i < num_traces; i++) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue