[compiler-rt] df626dd - Revert "[msan] Increase kNumStackOriginDescrs constant (#92838)"

[Thurston Dang via llvm-commits]

Author: Thurston Dang
Date: 2024-05-21T21:45:37Z
New Revision: df626dd11c360c58eddae813ce6a0524d0a53696

URL: https://github.com/llvm/llvm-project/commit/df626dd11c360c58eddae813ce6a0524d0a53696
DIFF: https://github.com/llvm/llvm-project/commit/df626dd11c360c58eddae813ce6a0524d0a53696.diff

LOG: Revert "[msan] Increase kNumStackOriginDescrs constant (#92838)"

This reverts commit 57a507930b50c445140feb68bffe1c21af53319e.

Reason: buildbot breakage
(https://lab.llvm.org/buildbot/#/builders/57/builds/35160)

Added: 
    

Modified: 
    compiler-rt/lib/msan/msan.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/msan/msan.cpp b/compiler-rt/lib/msan/msan.cpp
index 7a152910193e0..a2fc27de1901b 100644
--- a/compiler-rt/lib/msan/msan.cpp
+++ b/compiler-rt/lib/msan/msan.cpp
@@ -100,11 +100,7 @@ int msan_report_count = 0;
 
 // Array of stack origins.
 // FIXME: make it resizable.
-// Although BSS memory doesn't cost anything until used, it is limited to 2GB
-// in some configurations (e.g., "relocation R_X86_64_PC32 out of range:
-// ... is not in [-2147483648, 2147483647]; references section '.bss'").
-// We use kNumStackOriginDescrs * (sizeof(char*) + sizeof(uptr)) == 64MB.
-static const uptr kNumStackOriginDescrs = 4 * 1024 * 1024;
+static const uptr kNumStackOriginDescrs = 1024 * 1024;
 static const char *StackOriginDescr[kNumStackOriginDescrs];
 static uptr StackOriginPC[kNumStackOriginDescrs];
 static atomic_uint32_t NumStackOriginDescrs;