зеркало из https://github.com/github/ruby.git
Skip dwarf if its version is not supported
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65256 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse
Родитель
e77fdcd81d
Коммит
69e328b532
234
addr2line.c
234
addr2line.c
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@ -275,17 +275,88 @@ fill_line(int num_traces, void **traces, uintptr_t addr, int file, int line,
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}
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}
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struct LineNumberProgramHeader {
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uint64_t unit_length;
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uint16_t version;
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uint8_t format; /* 4 or 8 */
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uint64_t header_length;
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uint8_t minimum_instruction_length;
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uint8_t maximum_operations_per_instruction;
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uint8_t default_is_stmt;
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uint8_t line_base;
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uint8_t line_range;
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uint8_t opcode_base;
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/* uint8_t standard_opcode_lengths[opcode_base-1]; */
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const char *include_directories;
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const char *filenames;
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const char *cu_start;
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const char *cu_end;
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};
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static int
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parse_debug_line_header(const char **pp, struct LineNumberProgramHeader *header)
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{
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const char *p = *pp;
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header->unit_length = *(uint32_t *)p;
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p += sizeof(uint32_t);
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header->format = 4;
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if (header->unit_length == 0xffffffff) {
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header->unit_length = *(uint64_t *)p;
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p += sizeof(uint64_t);
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header->format = 8;
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}
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header->cu_end = p + header->unit_length;
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header->version = *(uint16_t *)p;
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p += sizeof(uint16_t);
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if (header->version > 4) return -1;
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header->header_length = header->format == 4 ? *(uint32_t *)p : *(uint64_t *)p;
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p += header->format;
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header->cu_start = p + header->header_length;
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header->minimum_instruction_length = *(uint8_t *)p++;
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if (header->version >= 4) {
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/* maximum_operations_per_instruction = *(uint8_t *)p; */
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p++;
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}
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header->default_is_stmt = *(uint8_t *)p++;
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header->line_base = *(int8_t *)p++;
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header->line_range = *(uint8_t *)p++;
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header->opcode_base = *(uint8_t *)p++;
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/* header->standard_opcode_lengths = (uint8_t *)p - 1; */
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p += header->opcode_base - 1;
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header->include_directories = p;
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/* temporary measure for compress-debug-sections */
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if (p >= header->cu_end) return -1;
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/* skip include directories */
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while (*p) {
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p = memchr(p, '\0', header->cu_end - p);
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if (!p) return -1;
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p++;
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}
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p++;
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header->filenames = p;
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*pp = header->cu_start;
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return 0;
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}
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static int
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parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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obj_info_t *obj, line_info_t *lines, int offset)
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{
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char *p, *cu_end, *cu_start, *include_directories, *filenames;
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unsigned long unit_length, header_length;
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unsigned short dwarf_version;
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ptrdiff_t dwarf_word = 4;
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int default_is_stmt, line_base;
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unsigned int minimum_instruction_length, line_range, opcode_base;
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/* unsigned char *standard_opcode_lengths; */
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const char *p = (const char *)*debug_line;
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struct LineNumberProgramHeader header;
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/* The registers. */
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unsigned long addr = 0;
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@ -299,75 +370,19 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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/* int epilogue_begin = 0; */
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/* unsigned int isa = 0; */
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p = *debug_line;
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unit_length = *(unsigned int *)p;
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p += sizeof(unsigned int);
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if (unit_length == 0xffffffff) {
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unit_length = *(unsigned long *)p;
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p += sizeof(unsigned long);
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dwarf_word = 8;
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}
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cu_end = p + unit_length;
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dwarf_version = *(unsigned short *)p;
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p += 2;
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header_length = dwarf_word == 4 ? *(unsigned int *)p : *(unsigned long *)p;
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p += dwarf_word;
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cu_start = p + header_length;
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minimum_instruction_length = *(unsigned char *)p;
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p++;
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if (dwarf_version >= 4) {
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/* maximum_operations_per_instruction = *(unsigned char *)p; */
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p++;
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}
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is_stmt = default_is_stmt = *(unsigned char *)p;
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p++;
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line_base = *(signed char *)p;
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p++;
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line_range = *(unsigned char *)p;
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p++;
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opcode_base = *(unsigned char *)p;
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p++;
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/* standard_opcode_lengths = (unsigned char *)p - 1; */
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p += opcode_base - 1;
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include_directories = p;
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/* temporary measure for compress-debug-sections */
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if (p >= cu_end) return -1;
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/* skip include directories */
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while (*p) {
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p = memchr(p, '\0', cu_end - p);
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if (!p) return -1;
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p++;
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}
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p++;
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filenames = p;
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p = cu_start;
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if (parse_debug_line_header(&p, &header))
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return -1;
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#define FILL_LINE() \
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do { \
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fill_line(num_traces, traces, addr, file, line, \
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include_directories, filenames, \
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(char *)header.include_directories, \
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(char *)header.filenames, \
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obj, lines, offset); \
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/*basic_block = prologue_end = epilogue_begin = 0;*/ \
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} while (0)
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while (p < cu_end) {
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while (p < header.cu_end) {
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unsigned long a;
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unsigned char op = *p++;
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switch (op) {
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@ -375,19 +390,19 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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FILL_LINE();
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break;
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case DW_LNS_advance_pc:
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a = uleb128(&p);
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a = uleb128((char **)&p);
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addr += a;
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break;
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case DW_LNS_advance_line: {
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long a = sleb128(&p);
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long a = sleb128((char **)&p);
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line += a;
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break;
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}
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case DW_LNS_set_file:
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file = (unsigned int)uleb128(&p);
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file = (unsigned int)uleb128((char **)&p);
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break;
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case DW_LNS_set_column:
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/*column = (unsigned int)*/(void)uleb128(&p);
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/*column = (unsigned int)*/(void)uleb128((char **)&p);
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break;
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case DW_LNS_negate_stmt:
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is_stmt = !is_stmt;
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@ -396,8 +411,8 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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/*basic_block = 1; */
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break;
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case DW_LNS_const_add_pc:
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a = ((255 - opcode_base) / line_range) *
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minimum_instruction_length;
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a = ((255 - header.opcode_base) / header.line_range) *
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header.minimum_instruction_length;
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addr += a;
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break;
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case DW_LNS_fixed_advance_pc:
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@ -411,7 +426,7 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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/* epilogue_begin = 1; */
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break;
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case DW_LNS_set_isa:
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/* isa = (unsigned int)*/(void)uleb128(&p);
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/* isa = (unsigned int)*/(void)uleb128((char **)&p);
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break;
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case 0:
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a = *(unsigned char *)p++;
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@ -424,7 +439,7 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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file = 1;
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line = 1;
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/* column = 0; */
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is_stmt = default_is_stmt;
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is_stmt = header.default_is_stmt;
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/* end_sequence = 0; */
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/* isa = 0; */
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break;
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@ -438,7 +453,7 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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break;
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case DW_LNE_set_discriminator:
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/* TODO:currently ignore */
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uleb128(&p);
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uleb128((char **)&p);
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break;
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default:
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kprintf("Unknown extended opcode: %d in %s\n",
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@ -448,16 +463,16 @@ parse_debug_line_cu(int num_traces, void **traces, char **debug_line,
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default: {
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unsigned long addr_incr;
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unsigned long line_incr;
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a = op - opcode_base;
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addr_incr = (a / line_range) * minimum_instruction_length;
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line_incr = line_base + (a % line_range);
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a = op - header.opcode_base;
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addr_incr = (a / header.line_range) * header.minimum_instruction_length;
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line_incr = header.line_base + (a % header.line_range);
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addr += (unsigned int)addr_incr;
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line += (unsigned int)line_incr;
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FILL_LINE();
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}
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}
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}
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*debug_line = p;
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*debug_line = (char *)p;
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return 0;
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}
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@ -922,49 +937,21 @@ di_read_debug_abbrev_cu(DebugInfoReader *reader)
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}
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}
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static void
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static int
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di_read_debug_line_cu(DebugInfoReader *reader)
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{
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char *p;
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unsigned long unit_length;
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unsigned short dwarf_version;
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unsigned int opcode_base;
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ptrdiff_t dwarf_word = 4;
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const char *p;
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struct LineNumberProgramHeader header;
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p = reader->debug_line_cu_end;
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p = (const char *)reader->debug_line_cu_end;
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if (parse_debug_line_header(&p, &header))
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return -1;
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unit_length = *(unsigned int *)p;
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p += sizeof(unsigned int);
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if (unit_length == 0xffffffff) {
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unit_length = *(unsigned long *)p;
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p += sizeof(unsigned long);
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dwarf_word = 8;
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}
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reader->debug_line_cu_end = (char *)header.cu_end;
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reader->debug_line_directories = (char *)header.include_directories;
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reader->debug_line_files = (char *)header.filenames;
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reader->debug_line_cu_end = p + unit_length;
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dwarf_version = *(unsigned short *)p;
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p += 2;
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p += dwarf_word;
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p += dwarf_version >= 4 ? 5 : 4;
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opcode_base = *(unsigned char *)p++;
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/* standard_opcode_lengths = (unsigned char *)p - 1; */
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p += opcode_base - 1;
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reader->debug_line_directories = p;
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/* skip include directories */
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while (*p) {
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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->obj->debug_line.ptr);
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abort();
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}
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p++;
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}
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p++;
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reader->debug_line_files = p;
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return 0;
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}
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static void
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@ -1423,7 +1410,7 @@ ranges_inspect(DebugInfoReader *reader, ranges_t *ptr)
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}
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#endif
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static void
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static int
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di_read_cu(DebugInfoReader *reader)
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{
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DW_CompilationUnitHeader32 *hdr32 = (DW_CompilationUnitHeader32 *)reader->p;
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@ -1445,7 +1432,7 @@ di_read_cu(DebugInfoReader *reader)
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}
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reader->level = 0;
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di_read_debug_abbrev_cu(reader);
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di_read_debug_line_cu(reader);
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if (di_read_debug_line_cu(reader)) return -1;
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#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER_BUILD_DATE)
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/* Though DWARF specifies "the applicable base address defaults to the base
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@ -1473,6 +1460,7 @@ di_read_cu(DebugInfoReader *reader)
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}
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} while (0);
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#endif
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return 0;
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}
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static void
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@ -1760,7 +1748,7 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
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i = 0;
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while (reader.p < reader.pend) {
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/* fprintf(stderr, "%d:%tx: CU[%d]\n", __LINE__, reader.p - reader.obj->debug_info.ptr, i++); */
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di_read_cu(&reader);
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if (di_read_cu(&reader)) goto fail;
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debug_info_read(&reader, num_traces, traces, lines, offset);
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}
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}
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@ -1952,7 +1940,7 @@ fill_lines(int num_traces, void **traces, int check_debuglink,
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DebugInfoReader reader;
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debug_info_reader_init(&reader, obj);
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while (reader.p < reader.pend) {
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di_read_cu(&reader);
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if (di_read_cu(&reader)) goto fail;
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debug_info_read(&reader, num_traces, traces, lines, offset);
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}
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}
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