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From Craig Silverstein: Add first version of generating error messages

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with file name and line number.
This commit is contained in:
Ian Lance Taylor
2007-11-02 23:02:44 +00:00
parent 8942f2584c
commit 5c2c6c957b
8 changed files with 1089 additions and 267 deletions
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52
gold/object.cc
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@ -27,6 +27,7 @@
#include <cstdarg>
#include "target-select.h"
#include "dwarf_reader.h"
#include "layout.h"
#include "output.h"
#include "symtab.h"
@ -844,7 +845,7 @@ Sized_relobj<size, big_endian>::get_symbol_location_info(
else if (sym.get_st_shndx() == shndx
&& static_cast<off_t>(sym.get_st_value()) <= offset
&& (static_cast<off_t>(sym.get_st_value() + sym.get_st_size())
>= offset))
> offset))
{
if (sym.get_st_name() > names_size)
info->enclosing_symbol_name = "(invalid)";
@ -907,25 +908,54 @@ template<int size, bool big_endian>
std::string
Relocate_info<size, big_endian>::location(size_t, off_t offset) const
{
// FIXME: We would like to print the following:
// /tmp/foo.o: in function 'fn':foo.c:12: undefined reference to 'xxx'
// We're missing line numbers.
// See if we can get line-number information from debugging sections.
std::string filename;
std::string file_and_lineno; // Better than filename-only, if available.
for (unsigned int shndx = 0; shndx < this->object->shnum(); ++shndx)
if (this->object->section_name(shndx) == ".debug_line")
{
off_t debuglines_size;
const unsigned char* debuglines = this->object->section_contents(
shndx, &debuglines_size, false);
if (debuglines)
{
Dwarf_line_info line_info(debuglines, debuglines_size);
line_info.read_line_mappings<size, big_endian>();
file_and_lineno = line_info.addr2line(this->data_shndx, offset);
}
break;
}
std::string ret(this->object->name());
ret += ':';
Symbol_location_info info;
if (this->object->get_symbol_location_info(this->data_shndx, offset, &info))
{
ret += " in function ";
// We could demangle this name before printing, but we don't
// bother because gcc runs linker output through a demangle
// filter itself. The only advantage to demangling here is if
// someone might call ld directly, rather than via gcc. If we
// did want to demangle, cplus_demangle() is in libiberty.
ret += info.enclosing_symbol_name;
ret += ":";
ret += info.source_file;
filename = info.source_file;
}
if (!file_and_lineno.empty())
ret += file_and_lineno;
else
{
if (!filename.empty())
ret += filename;
ret += "(";
ret += this->object->section_name(this->data_shndx);
char buf[100];
// Offsets into sections have to be positive.
snprintf(buf, sizeof(buf), "+0x%lx", static_cast<long>(offset));
ret += buf;
ret += ")";
}
ret += "(";
ret += this->object->section_name(this->data_shndx);
char buf[100];
// Offsets into sections have to be positive.
snprintf(buf, sizeof(buf), "+0x%lx)", static_cast<long>(offset));
ret += buf;
return ret;
}