From aa844899c937bde5d2b24f276b59997e5b668bde Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Thu, 8 Aug 2019 10:56:58 -0700 Subject: Creation of LTS branch "lts_2019_08_08" - 9ee91d3e430fb33a4590486573792eb0fa146c2d Export of internal Abseil changes by Abseil Team - 8efba58a3b656e9b41fb0471ae6453425a61c520 Export of internal Abseil changes by Abseil Team - b49b8d16b67ec6912899684b732e6367f258cfdb Export of internal Abseil changes by Abseil Team - 67222ffc4c83d918ce8395aa61769eeb77df4c4d Export of internal Abseil changes by Abseil Team - c5c4db4f5191fe5e76cbf68dcc71fb28702f7d2b Export of internal Abseil changes by Abseil Team - 14550beb3b7b97195e483fb74b5efb906395c31e Export of internal Abseil changes. by Abseil Team - 52e88ee56b72cf32bc66534d942c7398ce481331 Export of internal Abseil changes. by Abseil Team - 36d37ab992038f52276ca66b9da80c1cf0f57dc2 Export of internal Abseil changes. by Abseil Team - ad1485c8986246b2ae9105e512738d0e97aec887 Export of internal Abseil changes. by Abseil Team - f3840bc5e33ce4932e35986cf3718450c6f02af2 Export of internal Abseil changes. by Abseil Team - 278b26058c036833a4f7f3047d3f4d9296527f87 Export of internal Abseil changes. by Abseil Team - c6c3c1b498e4ee939b24be59cae29d59c3863be8 Export of internal Abseil changes. by Abseil Team - 44efe96dfca674a17b45ca53fc77fb69f1e29bf4 Export of internal Abseil changes. by Abseil Team - 3c98fcc0461bd2a4b9c149d4748a7373a225cf4b Merge pull request #340 from jtsylve/macos_cxx17_fix by Matt Calabrese <38107210+mattcalabrese-google@users.noreply.github.com> - 74d91756c11bc22f9b0108b94da9326f7f9e376f Export of internal Abseil changes. by Abseil Team - e6b050212c859fbaf67abac76105da10ec348274 Export of internal Abseil changes. by Abseil Team - c964fcffac27bd4a9ff67fe393410dd1146ef8b8 Export of internal Abseil changes. by Abseil Team - 72e09a54d993b192db32be14c65adf7e9bd08c31 Export of internal Abseil changes. by Abseil Team - d65e19dfcd8697076f68598c0131c6930cdcd74d Export of internal Abseil changes. by Abseil Team - 5162fc83d2f3b79a9753ed59594c43966afdd37a Merge pull request #336 from shields/patch-2 by Shaindel Schwartz <31392632+shaindelschwartz@users.noreply.github.com> - 0389f7bf58fa41f35b3ad60be61d32f31e4f8ed6 Merge pull request #335 from shields/patch-1 by Shaindel Schwartz <31392632+shaindelschwartz@users.noreply.github.com> - e9324d926a9189e222741fce6e676f0944661a72 Export of internal Abseil changes. by Abseil Team - 43ef2148c0936ebf7cb4be6b19927a9d9d145b8f Export of internal Abseil changes. by Abseil Team - a13d3df2b3ba68aeead92e2d078fba0510d55024 Merge pull request #323 from gosnik/master by Gennadiy Rozental - 310a11865c97c5cdcc42a4ee2c2e3578423afe69 Merge pull request #324 from RasPat1/patch-1 by Gennadiy Rozental - 8f11724067248acc330b4d1f12f0c76d03f2cfb1 Export of internal Abseil changes. by Abseil Team - b1dd425423380126f6441ce4fbb6f8f6c75b793a Export of internal Abseil changes. by Abseil Team - 361cb8a9db2f2130442389fd80593255be26d681 Export of internal Abseil changes. by Abseil Team - 0238ab0a831f179518c1a814f9584e99da2d75a3 Merge pull request #321 from christoph-cullmann/c4245_fix... by Xiaoyi Zhang - 61c9bf3e3e1c28a4aa6d7f1be4b37fd473bb5529 Export of internal Abseil changes. by Abseil Team - bc9101f9982391019521161a36179b52555ed212 Merge pull request #320 from christoph-cullmann/master by Xiaoyi Zhang - 2f76a9bf50046e396138cc8eeb3cdc17b7a5ac24 Export of internal Abseil changes. by Abseil Team - 4adaf5490921f13028b55018c9f550277de5aebb Export of internal Abseil changes. by Abseil Team - 27c30ec671cb7b5ba84c4e79feff7fd0b0ac6338 Avoid undefined behavior when nullptr is passed to memcpy... by Roman Gershman - ce65f5ac3cbf897bb5e3de1a51d80fd00866abaa Export of internal Abseil changes. by Abseil Team - a18fc7461e7409c2ad64e28537261db1e02e76fa Export of internal Abseil changes. by Abseil Team - 8a394b19c149cab50534b04c5e21d42bc2217a7d Export of internal Abseil changes. by Abseil Team - daf381e8535a1f1f1b8a75966a74e7cca63dee89 Export of internal Abseil changes. by Abseil Team - fa00c321073c7ea40a4fc3dfc8a06309eae3d025 Export of internal Abseil changes. by Abseil Team - 436ba6c4a0ea3a06eca6e055f9c8d296bf3bae12 Export of internal Abseil changes. by Abseil Team - 0cbdc774b97f7e80ab60dbe2ed4eaca3b2e33fc8 Export of internal Abseil changes. by Abseil Team - 27c2f6e2f3b5929fbd322b0f0ca392eb02efd9f8 Export of internal Abseil changes. by Abseil Team - aa468ad75539619b47979911297efbb629c52e44 Export of internal Abseil changes. by Abseil Team - cd86d0d20ab167c33b23d3875db68d1d4bad3a3b Export of internal Abseil changes. by Abseil Team - 33841c5c963aa9c3f096ef8e6c1e71624b941940 Export of internal Abseil changes. by Abseil Team - ca3f87560a0eef716195cadf66dc6b938a579ec6 Export of internal Abseil changes. by Abseil Team - d902eb869bcfacc1bad14933ed9af4bed006d481 Export of internal Abseil changes. by Abseil Team - a02f62f456f2c4a7ecf2be3104fe0c6e16fbad9a Export of internal Abseil changes. by Abseil Team - 0b545b460141b882b244a1efcef7621d59278160 Export of internal Abseil changes. by Abseil Team - dbae8764fbd429bf7d7745e24bcf73962177a7c0 Export of internal Abseil changes. by Abseil Team - 044da8a29c923506af0f0b46bc46f43c1e1300b5 Export of internal Abseil changes. by Abseil Team - 6cc6ac44e065b9e8975fadfd6ccb99cbcf89aac4 Export of internal Abseil changes. by Abseil Team - 666fc1266bccfd8e6eaaa084e7b42580bb8eb199 Export of internal Abseil changes. by Abseil Team - 93dfcf74cb5fccae3da07897d8613ae6cab958a0 Export of internal Abseil changes. by Abseil Team - 2c8421e1c6cef0da9e8a20b01c15256ec9ec116d Export of internal Abseil changes. by Abseil Team - 5b65c4af5107176555b23a638e5947686410ac1f Export of internal Abseil changes. by Abseil Team - eab2078b53c9e3d9d240135c09d27e3393acb50a Export of internal Abseil changes. by Abseil Team - 253eb7416421661873afbaa33828a850db978541 [CMake] Set correct flags for clang-cl (#278) by Loo Rong Jie - e75672f6afc7e8f23ee7b532e86d1b3b9be3984e Export of internal Abseil changes. by Abseil Team - bf29470384a101b307873b26d358433138c857fc Export of internal Abseil changes. by Abseil Team - 6fd827124facd8336981e73218997f9e73029b4f Merge pull request #280 from chiumichael/master by Derek Mauro <761129+derekmauro@users.noreply.github.com> - 7c7754fb3ed9ffb57d35fe8658f3ba4d73a31e72 Export of internal Abseil changes. by Abseil Team - 256be563447a315f2a7993ec669460ba475fa86a Export of internal Abseil changes. by Abseil Team - 88a152ae747c3c42dc9167d46c590929b048d436 Export of internal Abseil changes. by Abseil Team - c1cecb25a94c075725e9d2640f6b978a8f61957b Implement Span::first and Span::last from C++20 (#274) by Girts - 38b704384cd2f17590b3922b97744be0b43622c9 Changed HTTP URLs to HTTPS where possible (#270) by nik7273 - febc5ee6a92d0eb7dac1fceaa6c648cf6521b4dc Export of internal Abseil changes. by Abseil Team - 9fdf5e5b805412cb2a2e624d3e9a11588120465f Export of internal Abseil changes. by Abseil Team - 419f3184f8ebcdb23105295eadd2a569f3351eb9 Export of internal Abseil changes. by Abseil Team - b312c3cb53a0aad75a85ac2bf57c4a614fbd48d4 Export of internal Abseil changes. by Abseil Team - 308ce31528a7edfa39f5f6d36142278a0ae1bf45 Export of internal Abseil changes. by Abseil Team - 93d155bc4414f6c121bb1f19dba9fdb27c8943bc Export of internal Abseil changes. by Abseil Team - 426eaa4aa44e4580418bee46c1bd13911151bfb1 Export of internal Abseil changes. by Abseil Team - 2901ec32a919311384d6ad4194e2d927c06831f7 Export of internal Abseil changes. by Abseil Team - d78310fe5a82f2e0e6e16509ef8079c8d7e4674e Export of internal Abseil changes. by Abseil Team - a4cb1c8ba61531a63f9d309eea01ac1d43d8371d Export of internal Abseil changes. by Abseil Team - 540e2537b92cd4abfae6ceddfe24304345461f32 Export of internal Abseil changes. by Abseil Team - 89ea0c5ff34aaa5855cfc7aa41f323b8a0ef0ede Merge pull request #255 from uilianries/hotfix/conan by ahedberg - 5e0dcf72c64fae912184d2e0de87195fe8f0a425 Export of internal Abseil changes. by Abseil Team - 0dffca4e36791c7beeda04da10460b534283948a Export of internal Abseil changes. by Abseil Team - 6b4201f9ef650637510a21b8d6cbcc3bee4a606f Fix GCC8 warnings by Boris Staletic - 0b1e6d417b414aad9282e32e8c49c719edeb63c1 Export of internal Abseil changes. by Abseil Team - efccc502606bed768e50a6cd5806d8eb13e4e935 Export of internal Abseil changes. by Abseil Team - 5e6a78131f7bd5940218462c07d88cdefdd75dbe Export of internal Abseil changes. by Abseil Team - 5eea0f713c14ac17788b83e496f11903f8e2bbb0 Export of internal Abseil changes. by Abseil Team - 66f9becbb98ecc083f4db349b4b1e0ca9de93b15 Export of internal Abseil changes. by Abseil Team - 018b4db1d73ec8238e6dc4b17fd9e1fd7468d0ed Export of internal Abseil changes. by Abseil Team - 9449ae94397f2fd683851348e25ed8c93f75b3b9 Merge pull request #243 from ThomsonTan/FixIntrinsic by Alex Strelnikov - b16aeb6756bdab08cdf12d40baab5b51f7d15b16 Export of internal Abseil changes. by Abseil Team - 7ffbe09f3d85504bd018783bbe1e2c12992fe47c Export of internal Abseil changes. by Abseil Team - 01b471d9f3ebef27f5aaca14b66509099fa8cd6c Export of internal Abseil changes. by Abseil Team - 7bd8f36c741c7cbe311611d7981bf38ba04c6fef Export of internal Abseil changes. by Abseil Team - 968a34ffdaadd7db062a9621dfbdf8b2d16e05af Export of internal Abseil changes. by Abseil Team - 3e2e9b5557e76d098de4b8a2a659125b98ca519b Merge pull request #231 from uilianries/feature/conan by Mark Barolak - 111ca7060a6ff50115ca85b59f6b5d8c8c5e9105 Export of internal Abseil changes. by Abseil Team - 389ec3f906f018661a5308458d623d01f96d7b23 Export of internal Abseil changes. by Abseil Team - 8fbcdb90952c57828c4a9c2f6d79fcd7cae9088f Export of internal Abseil changes. by Abseil Team - 455dc17ba1af9635f0b60155bc565bc572a1e722 Export of internal Abseil changes. by Abseil Team - f197d7c72a54064cfde5a2058f1513a4a0ee36fb Export of internal Abseil changes. by Abseil Team - 284378a71b32dfb3af4e3661f585e671d1b603a3 Export of internal Abseil changes. by Abseil Team GitOrigin-RevId: 9ee91d3e430fb33a4590486573792eb0fa146c2d Change-Id: Ia06e548bc106cc9d136f6c65714be6645317aced --- absl/debugging/symbolize_elf.inc | 72 ++++++++++++++++++---------------------- 1 file changed, 33 insertions(+), 39 deletions(-) (limited to 'absl/debugging/symbolize_elf.inc') diff --git a/absl/debugging/symbolize_elf.inc b/absl/debugging/symbolize_elf.inc index 37f77ca6..2bd7659f 100644 --- a/absl/debugging/symbolize_elf.inc +++ b/absl/debugging/symbolize_elf.inc @@ -4,7 +4,7 @@ // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // -// http://www.apache.org/licenses/LICENSE-2.0 +// https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, @@ -76,7 +76,7 @@ #include "absl/debugging/internal/vdso_support.h" namespace absl { -inline namespace lts_2018_12_18 { +inline namespace lts_2019_08_08 { // Value of argv[0]. Used by MaybeInitializeObjFile(). static char *argv0_value = nullptr; @@ -306,7 +306,7 @@ class Symbolizer { char *tmp_buf, int tmp_buf_size); enum { - SYMBOL_BUF_SIZE = 2048, + SYMBOL_BUF_SIZE = 3072, TMP_BUF_SIZE = 1024, SYMBOL_CACHE_LINES = 128, }; @@ -763,37 +763,27 @@ FindSymbolResult Symbolizer::GetSymbolFromObjectFile( } } - // Consult a regular symbol table first. - if (!GetSectionHeaderByType(obj.fd, obj.elf_header.e_shnum, - obj.elf_header.e_shoff, SHT_SYMTAB, &symtab, - tmp_buf, tmp_buf_size)) { - return SYMBOL_NOT_FOUND; - } - if (!ReadFromOffsetExact( - obj.fd, &strtab, sizeof(strtab), - obj.elf_header.e_shoff + symtab.sh_link * sizeof(symtab))) { - return SYMBOL_NOT_FOUND; - } - const FindSymbolResult rc = - FindSymbol(pc, obj.fd, out, out_size, relocation, &strtab, &symtab, - opd_ptr, tmp_buf, tmp_buf_size); - if (rc != SYMBOL_NOT_FOUND) { - return rc; // Found the symbol in a regular symbol table. + // Consult a regular symbol table, then fall back to the dynamic symbol table. + for (const auto symbol_table_type : {SHT_SYMTAB, SHT_DYNSYM}) { + if (!GetSectionHeaderByType(obj.fd, obj.elf_header.e_shnum, + obj.elf_header.e_shoff, symbol_table_type, + &symtab, tmp_buf, tmp_buf_size)) { + continue; + } + if (!ReadFromOffsetExact( + obj.fd, &strtab, sizeof(strtab), + obj.elf_header.e_shoff + symtab.sh_link * sizeof(symtab))) { + continue; + } + const FindSymbolResult rc = + FindSymbol(pc, obj.fd, out, out_size, relocation, &strtab, &symtab, + opd_ptr, tmp_buf, tmp_buf_size); + if (rc != SYMBOL_NOT_FOUND) { + return rc; + } } - // If the symbol is not found, then consult a dynamic symbol table. - if (!GetSectionHeaderByType(obj.fd, obj.elf_header.e_shnum, - obj.elf_header.e_shoff, SHT_DYNSYM, &symtab, - tmp_buf, tmp_buf_size)) { - return SYMBOL_NOT_FOUND; - } - if (!ReadFromOffsetExact( - obj.fd, &strtab, sizeof(strtab), - obj.elf_header.e_shoff + symtab.sh_link * sizeof(symtab))) { - return SYMBOL_NOT_FOUND; - } - return FindSymbol(pc, obj.fd, out, out_size, relocation, &strtab, &symtab, - opd_ptr, tmp_buf, tmp_buf_size); + return SYMBOL_NOT_FOUND; } namespace { @@ -926,6 +916,14 @@ static const char *GetHex(const char *start, const char *end, return p; } +// Normally we are only interested in "r?x" maps. +// On the PowerPC, function pointers point to descriptors in the .opd +// section. The descriptors themselves are not executable code, so +// we need to relax the check below to "r??". +static bool ShouldUseMapping(const char *const flags) { + return flags[0] == 'r' && (kPlatformUsesOPDSections || flags[2] == 'x'); +} + // Read /proc/self/maps and run "callback" for each mmapped file found. If // "callback" returns false, stop scanning and return true. Else continue // scanning /proc/self/maps. Return true if no parse error is found. @@ -995,12 +993,8 @@ static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap( return false; } - // Check flags. Normally we are only interested in "r-x" maps. On - // the PowerPC, function pointers point to descriptors in the .opd - // section. The descriptors themselves are not executable code. So - // we need to relax the check below to "r**". - if (memcmp(flags_start, "r-x", 3) != 0 && // Not a "r-x" map. - !(kPlatformUsesOPDSections && flags_start[0] == 'r')) { + // Check flags. + if (!ShouldUseMapping(flags_start)) { continue; // We skip this map. } ++cursor; // Skip ' '. @@ -1475,5 +1469,5 @@ bool Symbolize(const void *pc, char *out, int out_size) { return ok; } -} // inline namespace lts_2018_12_18 +} // inline namespace lts_2019_08_08 } // namespace absl -- cgit v1.2.3