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PR symtab/17890

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gdb/ChangeLog:

	PR symtab/17890
	* dwarf2read.c (dwarf_decode_line_header): Punt if version > 4.
This commit is contained in:
Doug Evans 2015-01-29 10:26:38 -08:00
parent fa89cc82f5
commit cd366ee8c6
2 changed files with 15 additions and 0 deletions
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5
gdb/ChangeLog
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@ -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.

10
gdb/dwarf2read.c
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@ -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);