Commit Graph

7 Commits

Author SHA1 Message Date
Fangrui Song c3bc697974 [yaml2obj] Write the section header table after section contents
Linkers (ld.bfd/gold/lld) place the section header table at the very
end. This allows tools to strip it, which is optional in executable/shared objects.
In addition, if we add or section, the size of the section header table
will change. Placing the section header table in the end keeps section
offsets unchanged.

yaml2obj currently places the section header table immediately after the
program header. Follow what linkers do to make offset updating easier.

Reviewed By: grimar

Differential Revision: https://reviews.llvm.org/D67221

llvm-svn: 371074
2019-09-05 14:25:57 +00:00
George Rimar e3fb2d549b Recommit r369190 "[llvm-readobj/llvm-readelf] - Improve/cleanup the error reporting API."
Fix: Add a `consumeError` call removed by mistake to 'printStackSize',
this should fix the "Expected<T> must be checked before access or destruction." reported by following bot:
http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/9743/steps/stage%201%20check/logs/stdio

Original commit message:
Currently we have the following functions for error reporting:

LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg);
void reportError(Error Err, StringRef Input); 
void reportWarning(Twine Msg);
void reportWarning(StringRef Input, Error Err);
void warn(llvm::Error Err);
void error(std::error_code EC);

Problems are: naming is inconsistent, arguments order is inconsistent,
some of the functions looks excessive.

After applying this patch we have:

void reportError(Error Err, StringRef Input); 
void reportError(std::error_code EC, StringRef Input);
void reportWarning(Error Err, StringRef Input);

I'd be happy to remove reportError(std::error_code EC, StringRef Input) too, but it
is used by COFF heavily.

Test cases were updated, they show an improvement introduced.

Differential revision: https://reviews.llvm.org/D66286

llvm-svn: 369194
2019-08-17 16:07:18 +00:00
George Rimar c35d4c900d Revert r369190, r369192 ([llvm-readobj/llvm-readelf] - Improve/cleanup the error reporting API.)
It caused multiple BB failtures:

http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/9743/steps/stage%201%20check/logs/stdio
http://lab.llvm.org:8011/builders/clang-cmake-x86_64-sde-avx512-linux/builds/26042/steps/ninja%20check%201/logs/FAIL%3A%20LLVM%3A%3Astack-sizes.test

llvm-svn: 369193
2019-08-17 15:36:06 +00:00
George Rimar bb56755f15 [llvm-readobj/llvm-readelf] - Improve/cleanup the error reporting API.
urrently we have the following functions for error reporting:

--
LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg);
void reportError(Error Err, StringRef Input); 
void reportWarning(Twine Msg);
void reportWarning(StringRef Input, Error Err);
void warn(llvm::Error Err);
void error(std::error_code EC);
---

Problems are: naming is inconsistent, arguments order is inconsistent,
some of the functions looks excessive.

After applying this patch we have:

---
LLVM_ATTRIBUTE_NORETURN void reportError(Error Err, StringRef Input); 
LLVM_ATTRIBUTE_NORETURN void reportError(std::error_code EC, StringRef Input);
void reportWarning(Error Err, StringRef Input);
---

I'd be happy to remove reportError(std::error_code EC, StringRef Input) too, but it
is used by COFF heavily.

Test cases were updated, they show an improvement introduced.

Differential revision: https://reviews.llvm.org/D66286

llvm-svn: 369190
2019-08-17 14:36:40 +00:00
George Rimar d0921a4696 [Object/ELF.h] - Improve error reporting.
The errors coming from ELF.h are usually not very
useful because they are uninformative. This patch is a
first step to improve the situation.

I tested this patch with a run of check-llvm and found
that few messages are untested. In this patch, I did not
add more tests but marked all such cases with a "TODO" comment.

For all tested messages I extended the error text to
provide more details (see test cases changed).

Differential revision: https://reviews.llvm.org/D64014

llvm-svn: 365183
2019-07-05 11:28:49 +00:00
George Rimar fc7b911313 [llvm-readobj] - Do not use precompiled binary in elf-broken-dynsym-link.test
Now we can remove the "TODO" since https://bugs.llvm.org/show_bug.cgi?id=42216
was fixed.

llvm-svn: 363045
2019-06-11 10:28:15 +00:00
George Rimar dd4f253c4d [llvm-readobj/llvm-readelf] - Don't fail to dump the object if .dynsym has broken sh_link field.
This is https://bugs.llvm.org/show_bug.cgi?id=42215.

GNU readelf allows to dump the objects in that case,
but llvm-readobj/llvm-readelf reports an error and stops.

The patch fixes that.

Differential revision: https://reviews.llvm.org/D63074

llvm-svn: 362938
2019-06-10 14:23:46 +00:00