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| author | Doug Evans <dje@google.com> | 2015-01-29 10:26:38 -0800 |
|---|---|---|
| committer | Doug Evans <dje@google.com> | 2015-01-29 10:27:36 -0800 |
| commit | cd366ee8c6ca1dfe8aa11540402904b64775b208 (patch) | |
| tree | 88ea06ffb24babdb73a1b87c719e1d423a967670 | |
| parent | fa89cc82f5ca51f3135a9f2043b85b6a16c205eb (diff) | |
| download | gdb-cd366ee8c6ca1dfe8aa11540402904b64775b208.zip gdb-cd366ee8c6ca1dfe8aa11540402904b64775b208.tar.gz gdb-cd366ee8c6ca1dfe8aa11540402904b64775b208.tar.bz2 | |
PR symtab/17890
gdb/ChangeLog:
PR symtab/17890
* dwarf2read.c (dwarf_decode_line_header): Punt if version > 4.
| -rw-r--r-- | gdb/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/dwarf2read.c | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index f369364..af5da9b 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2015-01-29 Doug Evans <dje@google.com> + + PR symtab/17890 + * dwarf2read.c (dwarf_decode_line_header): Punt if version > 4. + 2015-01-25 Mark Wielaard <mjw@redhat.com> * dwarf2read.c (checkproducer): Call producer_is_gcc. diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c index 89b8dfe..090d1a5 100644 --- a/gdb/dwarf2read.c +++ b/gdb/dwarf2read.c @@ -17136,6 +17136,8 @@ get_debug_line_section (struct dwarf2_cu *cu) /* Read the statement program header starting at OFFSET in .debug_line, or .debug_line.dwo. Return a pointer to a struct line_header, allocated using xmalloc. + Returns NULL if there is a problem reading the header, e.g., if it + has a version we don't understand. NOTE: the strings in the include directory and file name tables of the returned object point into the dwarf line section buffer, @@ -17200,6 +17202,14 @@ dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) lh->statement_program_end = line_ptr + lh->total_length; lh->version = read_2_bytes (abfd, line_ptr); line_ptr += 2; + if (lh->version > 4) + { + /* This is a version we don't understand. The format could have + changed in ways we don't handle properly so just punt. */ + complaint (&symfile_complaints, + _("unsupported version in .debug_line section")); + return NULL; + } lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); line_ptr += offset_size; lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |